Particular safety requirements and test methods for screwdrivers and impact wrenches. Hand-held electric machines. Particular safety requirements and test methods for screwdrivers and impact wrenches Cordless drill screwdriver gost
Date of introduction 1995-01-01
1. Scope
1.1. Replacement
2. Terms and definitions
According to GOST 12.2.013.0 with the following change.
2.2.23. First paragraph. Replacement
3. General requirements
According to GOST 12.2.013.0.
4. Tests. General Provisions
According to GOST 12.2.013.0.
5. Rated voltage
According to GOST 12.2.013.0.
6. Classification
According to GOST 12.2.013.0.
7. Marking
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
9. Start
According to GOST 12.2.013.0.
According to GOST 12.2.013.0 with the following change.
11. Heating
According to GOST 12.2.013.0 with the following change.
11.4 Item replacement
12. Leakage current
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
14. Moisture resistance
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
16. Reliability
According to GOST 12.2.013.0 with the following change.
16.2. Addition
17. Abnormal operation
According to GOST 12.2.013.0.
18. Mechanical safety
According to GOST 12.2.013.0.
19. Mechanical strength
According to GOST 12.2.013.0.
20. Construction
According to GOST 12.2.013.0.
21. Internal wiring
According to GOST 12.2.013.0.
22. Completing products
According to GOST 12.2.013.0.
According to GOST 12.2.013.0 with the following change.
According to GOST 12.2.013.0.
25. Grounding
According to GOST 12.2.013.0.
26. Screws and connections
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
29. Corrosion resistance
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
APPENDIX 3 Acceptance
According to GOST 12.2.013.0.
INFORMATION DATA
snipov.net
GOST R 50635-94 “Hand-held electric machines. Particular safety requirements and test methods for screwdrivers and impact wrenches "
STATE STANDARD OF THE RUSSIAN FEDERATION
| ELECTRIC MANUAL MACHINES Particular safety requirements and test methods for screwdrivers and impact wrenches Electric hand-held tools. Particular safety requirements and methods of testing screwdrivers and impact wrenches |
Date of introduction 1995-01-01
This standard establishes safety requirements and test methods for electric hand-held screwdrivers and impact wrenches, which supplement, modify or replace paragraphs of GOST 12.2.013.0.
Test methods are in italics, national requirements are highlighted with a vertical line in the margin.
The requirements of the standard are mandatory.
1. Scope
According to GOST 12.2.013.0 with the following change.
1.1. Replacement
This standard applies to electric hand-held screwdrivers and impact wrenches (hereinafter referred to as machines).
2. Terms and definitions
According to GOST 12.2.013.0 with the following change.
2.2.23. First paragraph. Replacement
Normal load is a load that is created during intermittent operation, each cycle of which consists of a period of continuous operation of 1 min and a break of 1 min, during which the machine is turned off. The load applied to the machine during periods of uninterrupted operation must be such that the power input in watts is equal to the rated power input.
NOTE During this test, it is permissible to replace the clutch with a rotating gear, allowing the motor to be loaded with rated power input by means of the brake.
3. General requirements
According to GOST 12.2.013.0.
4. Tests. General Provisions
According to GOST 12.2.013.0.
5. Rated voltage
According to GOST 12.2.013.0.
6. Classification
According to GOST 12.2.013.0.
7. Marking
According to GOST 12.2.013.0.
8. Protection from defeat electric shock
According to GOST 12.2.013.0.
According to GOST 12.2.013.0.
10. Power consumption and current
According to GOST 12.2.013.0 with the following change.
10.1. This item is not checked.
11. Heating
According to GOST 12.2.013.0 with the following change.
11.4 Item replacement
The machine is operated under normal load for 30 cycles.
The temperature rise is measured at the end of the 30th switch-on period.
12. Leakage current
According to GOST 12.2.013.0.
13. Suppression of radio and television interference
According to GOST 12.2.013.0.
14. Moisture resistance
According to GOST 12.2.013.0.
15. Insulation resistance and dielectric strength
According to GOST 12.2.013.0.
16. Reliability
According to GOST 12.2.013.0 with the following change.
16.2. Addition
The impact wrench must operate for 24 hours in intermittent operation, each cycle of which consists of a 5 s idle period and a 5 s break, during which the machine is turned off.
The test is carried out for 12 hours at a supply voltage equal to 1.1 times the rated voltage, and then for 12 hours at a supply voltage equal to 0.9 times the rated voltage.
17. Abnormal operation
According to GOST 12.2.013.0.
18. Mechanical safety
According to GOST 12.2.013.0.
19. Mechanical strength
According to GOST 12.2.013.0.
20. Construction
According to GOST 12.2.013.0.
21. Internal wiring
According to GOST 12.2.013.0.
22. Completing products
According to GOST 12.2.013.0.
23. Mains connection and external flexible cables and cords
According to GOST 12.2.013.0 with the following change.
23.3. First and second paragraphs. Replacement
The cable should conform to a conventional flexible polychloroprene sheath or equivalent synthetic rubber sheath.
24. Clamps for external wires
According to GOST 12.2.013.0.
25. Grounding
According to GOST 12.2.013.0.
26. Screws and connections
According to GOST 12.2.013.0.
27. Creepage distances, clearances and insulation thickness
According to GOST 12.2.013.0.
28. Heat resistance, fire resistance and resistance to the formation of conductive bridges
According to GOST 12.2.013.0.
29. Corrosion resistance
According to GOST 12.2.013.0.
APPENDIX A Thermal switches and overload protection devices
According to GOST 12.2.013.0.
APPLICATION
Electronic circuits
According to GOST 12.2.013.0.
APPLICATION
Safety isolation transformer design
According to GOST 12.2.013.0.
APPLICATION
Measurement of creepage distances and clearances
According to GOST 12.2.013.0.
APPENDIX 1 Safety rules for the operation of machines in production conditions
According to GOST 12.2.013.0.
APPENDIX 2 Safety rules for the operation of machines in living conditions
According to GOST 12.2.013.0.
APPENDIX 3 Acceptance
According to GOST 12.2.013.0.
INFORMATION DATA
REFERENCE REGULATORY AND TECHNICAL DOCUMENTS
files.stroyinf.ru
Gost for a screwdriver »Perforators, drills, screwdrivers and wrenches.
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GOST R 50635-94 Hand-held electric machines. Particular safety requirements and test methods for screwdrivers and impact wrenches - free download
GOST R 50635-94 Hand-held electric machines. Particular safety requirements and test methods for screwdrivers and impact wrenches
GOST P 50635-94
(IEC 745-2-2-82)
STATE STANDARD OF THE RUSSIAN FEDERATION
ELECTRIC MANUAL MACHINES
Particular safety requirements and test methods for screwdrivers and impact wrenches
STATE STANDARD OF RUSSIA
Foreword
1. DEVELOPED AND INTRODUCED by the Technical Committee TC 262 "Mechanized and manual tools"
This standard contains the full authentic text of the international standard IEC 745-2-2-82 "Safety of hand-held electrical machines. Part 2. Particular requirements for screwdrivers and impact wrenches "with additional requirements reflecting the needs National economy
3. INTRODUCED FOR THE FIRST TIME
4. REDISSION
| 1. Scope 2. Terms and Definitions 3. General requirements 4. Tests. General Provisions 5. Rated voltage 6. Classification 7. Marking 8. Protection against electric shock 10. Power consumption and current 11. Heating 12. Leakage current 13. Suppression of radio and television interference 14. Moisture resistance 15. Insulation resistance and dielectric strength 16. Reliability 17. Abnormal operation 18. Mechanical safety 19. Mechanical strength 20. Construction 21. Internal wiring 22. Completing products 23. Mains connection and external flexible cables and cords 24. Clamps for external wires 25. Grounding 26. Screws and connections 27. Creepage distances, clearances and insulation thickness 28. Heat resistance, fire resistance and resistance to the formation of conductive bridges 29. Corrosion resistance APPENDIX A Thermal switches and overload protection devices APPENDIX B Electronic Circuits APPENDIX C Design of Safety Isolation Transformers APPENDIX D Creepage and Clearance Measurements APPENDIX 1 Safety rules for the operation of machines in production conditions APPENDIX 2 Safety rules for the operation of machines in a domestic environment APPENDIX 3 Acceptance |
STATE STANDARD OF THE RUSSIAN FEDERATION
| ELECTRIC MANUAL MACHINES Particular safety requirements and test methods for screwdrivers and impact wrenches Electric hand-held tools. Particular safety requirements and methods of testing screwdrivers and impact wrenches |
Date of introduction 1995-01-01
This standard establishes safety requirements and test methods for electric hand-held screwdrivers and impact wrenches, which supplement, modify or replace paragraphs of GOST 12.2.013.0.
Test methods are in italics, national requirements are highlighted with a vertical line in the margin.
The requirements of the standard are mandatory.
1. Scope
According to GOST 12.2.013.0 with the following change.
1.1. Replacement
This standard applies to electric hand-held screwdrivers and impact wrenches (hereinafter referred to as machines).
2. Terms and definitions
According to GOST 12.2.013.0 with the following change.
2.2.23. First paragraph. Replacement
Normal load is a load that is created during intermittent operation, each cycle of which consists of a period of continuous operation of 1 min and a break of 1 min, during which the machine is turned off. The load applied to the machine during periods of uninterrupted operation must be such that the power input in watts is equal to the rated power input.
NOTE During this test, it is permissible to replace the clutch with a rotating gear, allowing the motor to be loaded with rated power input by means of the brake.
3. General requirements
According to GOST 12.2.013.0.
4. Tests. General Provisions
According to GOST 12.2.013.0.
5. Rated voltage
According to GOST 12.2.013.0.
6. Classification
According to GOST 12.2.013.0.
7. Marking
According to GOST 12.2.013.0.
8. Protection against electric shock
According to GOST 12.2.013.0.
9. Start
According to GOST 12.2.013.0.
10. Power consumption and current
According to GOST 12.2.013.0 with the following change.
10.1. This item is not checked.
11. Heating
According to GOST 12.2.013.0 with the following change.
11.4 Item replacement
The machine is operated under normal load for 30 cycles.
The temperature rise is measured at the end of the 30th switch-on period.
12. Leakage current
According to GOST 12.2.013.0.
13. Suppression of radio and television interference
According to GOST 12.2.013.0.
14. Moisture resistance
According to GOST 12.2.013.0.
15. Insulation resistance and dielectric strength
According to GOST 12.2.013.0.
16. Reliability
According to GOST 12.2.013.0 with the following change.
16.2. Addition
The impact wrench must operate for 24 hours in intermittent operation, each cycle of which consists of a 5 s idle period and a 5 s break, during which the machine is turned off.
The test is carried out for 12 hours at a supply voltage equal to 1.1 times the rated voltage, and then for 12 hours at a supply voltage equal to 0.9 times the rated voltage.
17. Abnormal operation
According to GOST 12.2.013.0.
18. Mechanical safety
According to GOST 12.2.013.0.
19. Mechanical strength
According to GOST 12.2.013.0.
20. Construction
According to GOST 12.2.013.0.
21. Internal wiring
According to GOST 12.2.013.0.
22. Completing products
According to GOST 12.2.013.0.
23. Mains connection and external flexible cables and cords
According to GOST 12.2.013.0 with the following change.
23.3. First and second paragraphs. Replacement
The cable should conform to a conventional flexible polychloroprene sheath or equivalent synthetic rubber sheath.
24. Clamps for external wires
According to GOST 12.2.013.0.
25. Grounding
According to GOST 12.2.013.0.
26. Screws and connections
According to GOST 12.2.013.0.
27. Creepage distances, clearances and insulation thickness
According to GOST 12.2.013.0.
28. Heat resistance, fire resistance and resistance to the formation of conductive bridges
According to GOST 12.2.013.0.
29. Corrosion resistance
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FOR TECHNICAL REGULATION AND METROLOGY
GOST R mek 60745-2-2-2010
NATIONAL
STANDARD
RUSSIAN
FEDERATIONS
Hand-held electric machines
SAFETY AND TEST METHODS
IEC 60745-2-2: 2008 Hand-held motor-operated electric tools - Safety -
Part 2-2: Particular requirements for screwdrivers and impact wrenches
Official edition
|
Standardinform |
Foreword
Objectives and principles of standardization in Russian Federation installed Federal law of December 27, 2002 No. 184-FZ "On technical regulation", and the rules for the application of national standards of the Russian Federation - GOST R 1.0-2004 "Standardization in the Russian Federation. Basic provisions "
Information about the standard
1 PREPARED by the Autonomous Non-Commercial Organization “Russian Electric Machines. Certification "(ANO REMS) based on its own authentic translation into Russian of the standard specified in clause 4
2 INTRODUCED by the Technical Committee for Standardization TC 262 "Power and Hand Tools"
3 APPROVED AND INTRODUCED BY Order Federal agency on technical regulation and metrology dated November 30, 2010 No. 589-st
4 This standard is identical to the international standard IEC 60745-2-2: 2008 "Power hand tools powered by a motor. Security. Part 2-2. Particular requirements for screwdrivers and wrenches "(IEC 60745-2-2: 2008" Hand-held motor-operated electric tools - Safety - Part2-2: Particular requirements for screwdrivers and impact wrenches ").
The name of this standard has been changed relative to the name of the specified international standard to bring it into line with GOST R 1.5-2004 (clause 3.5)
Moscow, Lyalin per., 6.
Typed in FSUE "STANDARTINFORM" on a PC. Printed at the branch of FSUE STANDARTINFORM - type. "Moscow printer", 105062
1 area of use............................................... ....1
3 Terms and definitions .............................................. ..1
4 General requirements ............................................... .....1
5 General test conditions .............................................. .1
6 Under consideration .............................................. ...1
7 Classification ................................................ ......1
8 Marking and instructions .............................................. ..2
9 Protection against contact with live parts ................................... 2
10 Start ................................................ ............. 2
11 Power consumption and current ............................................ 2
12 Heating ................................................ ........... 2
13 Leakage current ............................................... .......... 2
14 Moisture resistance ................................................ ..... 2
15 Dielectric strength ............................................... 2
16 Overload protection of transformers and connected circuits ................... 2
17 Reliability ................................................ ........ 3
18 Abnormal operation ............................................ 3
19 Mechanical safety ............................................. 3
20 Mechanical strength ............................................... 3
21 Design ................................................ ....... 3
22 Internal wiring ............................................... ... 3
23 Accessories ............................................... 4
24 Connection to power supply and external flexible cords ........................ 4
25 Terminals for external wires ........................................... 4
26 Grounding ................................................ ........4
27 Screws and connections .............................................. ....4
28 Creepage distances, clearances and insulation distances ... 4
29 Resistance to heat, fire resistance and resistance to the formation of current-carrying bridges ........... 4
30 Corrosion resistance ............................................... .4
31 Radiation, toxicity and similar hazards .................................. 4
Appendix K (normative) Accumulator cars and storage batteries ........... 5
Annex L (normative) Battery machines and batteries provided for connection to the mains or non-isolated power sources ... 5
Bibliography................................................. .......5
Appendix YES (informative) Compliance information with referenced International Standards
reference national standards Russian Federation ............... 6
Introduction
This standard refers to a set of standards that establish safety requirements for hand-held electrical machines and methods for their testing.
This standard is used in conjunction with GOST R IEC 60745-1-2009 "Hand-held electric machines. Safety and test methods. Part 1. General requirements ", which is identical to the international standard IEC 60745-1: 2006" Hand-held electric tools driven by an electric motor. Security. Part 1. General requirements ".
This standard specifies specific safety requirements and test methods for screwdrivers and impact wrenches that supplement, modify or replace the relevant clauses, subsections, clauses, tables and figures of IEC 60745-1: 2006.
Section numbers, clauses, tables and figures correspond to those given in IEC 60745-2-2: 2008. Clauses complementary to IEC 60745-1: 2006 are numbered starting with 101.
In this standard, the requirements for test methods for screwdrivers and impact wrenches are shown in italics.
The change in the title of Section 3 was caused by the need to bring it into conformity with GOST R 1.5-2004.
NATIONAL STANDARD OF THE RUSSIAN FEDERATION
Handheld electrical machines SAFETY AND TEST METHODS Part 2-2
Particular requirements for screwdrivers and impact wrenches
Hand-held motor-operated electric tools. Safety and test methods.
Part 2-2. Particular requirements for screwdrivers and impact wrenches
Date of introduction - 2012-01-01
1 area of use
According to IEC 60745-1 with the following addition:
1.1 Addition
This standard applies to screwdrivers and impact wrenches.
2 Normative references
According to IEC 60745-1.
3 Terms and definitions
According to IEC 60745-1 with the following additions:
3.101 screwdrivermachine which is designed to tighten the loosening of screws, nuts and the like, is not equipped with an impact device, but which may be equipped with a device to adjust the depth or torque or to stop rotation
3.102 Impact WrenchMachine designed for tightening and loosening screws, nuts of similar elements, equipped with a rotating impact mechanism Impact wrenches can be equipped with a device to adjust the depth or torque, or to stop rotation.
4 General requirements
According to IEC 60745-1.
5 General test conditions
According to IEC 60745-1.
6 Pending 7 Classification
According to IEC 60745-1.
Official edition
8 Marking and instructions
8.12.1.1 Addition:
Hold the machine by insulated hand gripping surfaces when performing an operation where fasteners (screwed screws or screws) could come into contact with hidden wiring or with their own cable. When they come into contact with a live conductor, metal parts of the machine that are accessible to touch are energized, and as a result, the operator can be electrocuted.
9 Protection against contact with live parts
According to IEC 60745-1.
10 Start
According to IEC 60745-1.
11 Power consumption and current
According to IEC 60745-1.
12 Heating
According to IEC 60745-1 with the following modification:
12.4 Replacement:
The machine must operate in intermittent mode for 30 cycles or until a state of thermal equilibrium (steady state) is reached, whichever is reached first. Each cycle consists of a 30 s run period and a 90 s rest period during which the machine is turned off. During operation, the machine is braked to the rated power input or rated current input. The temperature rise is measured at the end of the 30th "On" period. By agreement with the manufacturer, the machine can operate in a continuous mode until a state of thermal equilibrium (steady state) is reached.
The impact mechanism can be disabled to prevent damage to the brake.
13 Leakage current
According to IEC 60745-1.
14 Moisture resistance
According to IEC 60745-1.
15 Dielectric strength
According to IEC 60745-1.
16 Overload protection for transformers and associated circuits
17 Reliability
According to IEC 60745-1 with the following modification:
17.2 Replacement
For screwdrivers, the test in accordance with IEC 60745-1 applies.
Impact wrenches are tested as follows:
The impact wrench must operate at intermittent operation for 12 hours at a supply voltage equal to 1.1 of the rated voltage, and then for 12 hours at a voltage equal to 0.9 of the rated voltage.
The wrench can be turned on and off using a switch in addition to the one built into the machine.
Each duty cycle consists of an On-position period of 100 seconds when the machine is idling and an Off-position period of 20 seconds, with the duration of the break included in the prescribed working time.
During the above test, the wrench is placed in three different positions, with a working period at each test voltage of approximately 4 hours for each position.
Thereafter, the impact wrench shall operate under intermittent operation for 12 hours at a supply voltage equal to 1.1 of the rated voltage, and then for 12 hours at a voltage equal to 0.9 of the rated voltage under the following conditions.
In each working cycle, the impact wrench operates in an impact mode for 1 s and in a disconnected state for 9 s, with the break time included in the prescribed working time.
During this test, replacement of brushes is allowed and the wrench is lubricated as in normal use.
If, during the test, the striking mechanism fails and the parts of the machine accessible to touch are not energized, the striking mechanism may be replaced.
If the temperature rise of any part of the wrench is greater than the temperature rise measured during the test of 12.1, forced cooling or rest periods are provided that are not included in the prescribed operating time.
During these tests, the overload protection devices shall not trip.
18 Abnormal operation
According to IEC 60745-1.
19 Mechanical safety
According to IEC 60745-1.
20 Mechanical strength
According to IEC 60745-1 with the following modification:
20.5 This clause does not apply to impact wrenches.
21 Construction
According to IEC 60745-1 with the following modification:
21.32 This clause does not apply to impact wrenches.
22 Internal wiring
According to IEC 60745-1.
23 Accessories
According to IEC 60745-1 with the following modification:
23.3 Substitution
Overload protection devices must not provide for self-resetting if the machine is not equipped with a switch providing for fixing in the "on" position. Compliance is checked by inspection.
24 Power connection and external flexible cords
According to IEC 60745-1 with the following modification:
24.4 Replacement of the first and second paragraphs:
The flexible power cable (cord) for impact wrenches shall not be lighter than a reinforced polychloroprene sheath (code designation 60245 IEC 66 according to IEC 60245-1).
25 Clamps for external conductors
According to IEC 60745-1.
26 Grounding
According to IEC 60745-1.
27 Screws and connections
According to IEC 60745-1.
28 Creepage distances, clearances and insulation distances
According to IEC 60745-1.
29 Resistance to heat, fire and bridging
According to IEC 60745-1.
30 Corrosion resistance
According to IEC 60745-1.
31 Radiation, toxicity and similar hazards
According to IEC 60745-1.
GOST R IEC 60745-2-2-2010
Applications
According to IEC60745-1 with the following modifications:
Appendix K (mandatory)
Accumulator cars and batteries
K. 1.1 Addition:
K.8.12.1.1 Replacement:
Hold the machine by insulated hand gripping surfaces when performing an operation where fasteners (screwed screws or screws) could come into contact with hidden wiring. When they come into contact with a live conductor, metal parts of the machine that are accessible to touch are energized, and as a result, the operator can be electrocuted.
K.12.4 Replacement:
This clause does not apply.
K.17.2 Replacement:
This clause does not apply.
K.24.4 Replacement:
This clause does not apply.
Appendix L (mandatory)
Accumulator machines and accumulator batteries provided with connection to the mains or non-isolated power sources
L.1.1 Addition:
All clauses of this standard apply unless otherwise specified in this annex.
Bibliography
According to IEC60745-1.
Appendix YES (reference)
Information on the compliance of international reference standards with reference national standards of the Russian Federation
|
Table YES.1 |
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|
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Cordless drills are a tool that allows you to tighten and unscrew self-tapping screws, as well as drill holes in any hard-to-reach places without connecting the tool to the electrical network using a cable.
Today, almost all leading tool manufacturers offer screwdriver models that differ in their characteristics and prices.
Screwdriver device
As a rule, all screwdrivers are arranged in about the same way. The main parts are the battery, the DC motor, the gearbox, the load regulator and the chuck into which the bit or drill is clamped.
The operating time without recharging depends on the type and capacity of the battery, the device of the gearbox having more than one rotation speed will allow you not only to tighten and unscrew the screws, but also to drill wood or metal with ease.
What are screwdrivers
Modern screwdrivers have some design features that make it much more convenient to work.
Almost all screwdrivers have a reverse, which allows you to switch the rotation of the chuck in one direction or the other, that is, literally on the go, switch from tightening the screw to unscrewing it. Reverse is activated by pressing the button, as shown in the figure below:
Some models are equipped with an impact mechanism that allows you to drill brick or concrete no worse than a conventional electric drill.
You can find cordless drills with LED illumination, which can be very convenient when working in places with poor lighting.
The presence of a spindle lock, and keyless chuck help you quickly change your rig.
If, when buying an instrument, you plan to perform some minor one-time work, the presence or absence of such additional options may not play crucial... But if you plan to use a screwdriver often, performing large amounts of work, then their absence can become a very noticeable disadvantage.
Screwdriver gearbox
Depending on the device of the screwdriver gearbox, the tool can have 1-2 or more rotation speeds. The planetary gearbox consists of a ring gear, a sun gear, a carrier and satellites.
With a two-speed gearbox, the first speed (up to 450 rpm) allows you to work on twisting / unscrewing self-tapping screws, and the second speed (up to 1400 rpm) makes it possible to use a screwdriver as a drill.
Battery for screwdriver
Today on the market there are screwdrivers equipped with rechargeable batteries several different types- lithium-ion, nickel-metal hydride and nickel-cadmium. Which one is better and why?
The most popular batteries today are nickel-cadmium and lithium-ion batteries.
Each battery type has its own advantages and disadvantages, which may affect the overall impression of the instrument as a whole. What are the features of different types of batteries and what to look for before buying?
Without going into the jungle of electrical concepts, you can advise for regular work to purchase a drill-screwdriver with a nickel-cadmium battery, which has two batteries in its configuration - while one is working, the other is being charged.
One of the main disadvantages of a Ni-Cd battery is the need to completely discharge it during operation, and then also fully charge it. When not in use, a charged Nickel-Cadmium battery will quickly lose charge. In addition, such a battery that is not recharged to full charge, after lying idle for a while, may lose capacity.
Lithium-ion batteries are believed to hold a charge longer between jobs and do not need to be fully discharged — they can be recharged even if they are not fully discharged.
But nickel-cadmium batteries have one more advantage - they can be used at slight negative temperatures.
Characteristics of screwdrivers
Battery voltage
The torque directly depends on the supply voltage of the screwdriver. The higher the voltage, the greater the maximum torque, the easier it is to tighten a self-tapping screw of a large diameter and length or drill a hole of the required diameter.
Screwdrivers are equipped with batteries with a supply voltage of 9 to 36 volts. The lowest voltage will only allow you to screw a sheet of drywall to the profile. If you plan to work on the installation of wooden structures, drilling holes, tightening long screws of large diameter, where significant effort is required, then you should choose a tool with a supply voltage of at least 12-14 volts.
Torque
Torque is one of the most important characteristics of a screwdriver. The more power the power tool is able to develop, the easier it will be to tighten or unscrew self-tapping screws of large diameters or lengths, as well as drill holes.
Torque is measured in newtons per meter (Nm). For domestic use, a screwdriver with a torque of 10-15 Nm is enough. But for jobs that require significant effort, this torque may not be enough. In this case, you should take a closer look at professional-class models that develop a torque of up to 40-60 Nm. There are cordless screwdrivers with a maximum torque of 130 Nm.
The torque is regulated on the screwdriver with a special ring, the torque value should be set in such a way that the splines of the screws are not crumpled when they are tightened with the required force to the stop.
Other characteristics
Drilling diameter, number of speeds, the presence of an impact mechanism - all this should be selected based on the need. Do not overpay for a 36 mm drill / driver with a percussion mechanism and 120 Nm torque if you only plan to screw a couple of sheets of corrugated board to a pitched roof.
Also, when purchasing a cordless screwdriver, pay attention to the complete set - the presence of a replaceable battery, a plastic carrying case, the presence of a belt for the screwdriver, as well as various replaceable attachments.
Hand-held electric machines. Particular safety requirements and test methods for screwdrivers and impact wrenches
Superseded This standard applies to electric hand-held screwdrivers and impact wrenches.
This standard establishes safety requirements and test methods for electric hand-held screwdrivers and impact wrenches, which supplement, modify or replace paragraphs of GOST 12.2.013.0
Text of GOST R 50635-94
Other GOSTs
GOST R 50637-94 Hand-held electric machines. Particular safety requirements and test methods for threading machines for internal threadsGOST 30701-2001 Hand-held electric machines. Particular safety requirements and test methods for stapling machines
GOST 30699-2001 Hand-held electric machines. Particular safety requirements and test methods for milling and edge processing machines
GOST 30506-97 Hand-held electric machines. Particular safety requirements and test methods for chain saws
GOST 12.2.013.3-2002 Hand-held electric machines. Particular safety requirements and test methods for grinding, disc grinding and polishing machines with rotary motion of the working tool
GOST 12.2.013.3-95 Hand-held electric machines. Particular safety requirements and test methods for grinding, disc grinding and polishing machines with rotary motion of the working tool
GOST R 50614-93 Hand-held electric machines. Particular safety requirements and test methods for grinding, disc grinding and polishing machines with rotary motion of the working tool
GOST IEC 62841-2-21-2018 Hand-held, portable and electric gardening machines. Safety and test methods. Part 2-21. Particular requirements for manual pipe cleaning machines
GOST IEC 62841-2-2-2015 Hand-held, portable and electric gardening machines. Safety and test methods. Part 2-2. Particular requirements for screwdrivers and impact wrenches
GOST IEC 62841-2-17-2018 Hand-held, portable and electric gardening machines. Safety and test methods. Part 2-17. Particular requirements for manual molding machines
GOST IEC 62841-2-14-2016 Hand-held, portable and electric gardening machines. Safety and test methods. Part 2-14. Particular requirements for hand planers
GOST IEC 62841-2-11-2017 Hand-held, portable and electric gardening machines. Safety and test methods. Part 2-11. Particular requirements for hand saws with a reciprocating movement of the working tool (jigsaws and hacksaws)