Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T 5343-1999
Electric self-tapping screwdriver
Published on August 6, 1999
National Bureau of Machinery Industry
Implemented on January 1, 2000
JB/T 5343-1999
This standard is the first revision of JB5343-91 "Electric self-tapping screwdriver". This standard complies with GB3883.2-1991 "Safety of Hand-held Electric Tools Part 2"
(idtIEC60745-2-1:1982).
This standard adds 4.8.2, 4.8.3, 5.5, 5.6, and modifies 2, 8.1.
Special requirements for screwdrivers and impact wrenches》This standard is compiled based on GB/T1.1-1993 & Guidelines for Standardization Unit 1: Rules for drafting and expressing standards Part 1: Basic provisions for the compilation of standards.
This standard replaces JB5343-91 from the date of implementation. This standard is proposed and managed by the National Electric Tool Standardization Committee. The drafting unit of this standard: Beijing Electric Tool Factory. The drafters of this standard: Zhou Xingsheng, Shen Wangkun, Wang Fenglan. -
Mechanical Industry Standard of the People's Republic of China
Electric self-tapping screwdriver
JB/T 5343 - 1999
Replaces JB5343-91
This standard specifies the basic parameters and types, technical requirements, test methods and inspection rules of electric self-tapping screwdrivers. This standard applies to AC/DC dual-purpose, single-phase series-excited self-tapping screwdrivers (hereinafter referred to as self-tapping screwdrivers) for tightening or removing cross-slot self-tapping screws under normal environmental conditions.
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 755—1987
GB2099.1—1996
GB 3883.2—1991
GB4343—1995
GB/T4583—1995
GB5013.4—1997
GB 5023.5—1997
GB/T9088—1988
GB17625.11998
GB17625.2—1999
Basic parameters and types
Basic technical requirements for rotating electrical machines
Plugs and sockets for household and similar purposes
(eqvIEC60884:1994)
Part 1: General requirements
Safety of hand-held electric tools Part 2
(idtIEC 60745-2-1:1982)
Special requirements for screwdrivers and impact wrenches
Methods of measurement and allowable values of radio interference characteristics of household and similar electric and heating appliances, electric tools and similar electrical appliances (eqvC.ISPRNO.14:1993) Engineering method for measuring noise of electric tools
Rubber insulated flexible cables with rated voltage of 450/750V and below (idtIEC60245:1994)
Part 4: Flexible cords and flexible cables
Polyvinyl fluoride insulated cables with rated voltage of 450/750V and below Cable (idtIEC60227:1993)
Method for compiling electric tool models
Part 5: Flexible electric wires (flexible cords)
Limits of harmonic currents emitted by low-voltage electrical and electronic equipment (equipment input current per phase ≤16A) (idtIEC61000-3-2:1995)
Electromagnetic compatibility
Limits of voltage fluctuations and flicker generated in low-voltage power supply systems by equipment with rated current not exceeding 16A (idtIEC61000-3-3:1994)The basic parameters of self-tapping screwdrivers shall comply with the provisions of Table 1. Table 1
Applicable range of self-tapping screws
ST3--ST5
ST4—ST6
Approved by the State Machinery Industry Bureau on August 6, 1999 W
Output power
≥200
Load speed r/min
≥1600
≥1500
Implemented on January 1, 2000
JB/T5343-1999
3.2 The model of self-tapping screwdriver shall comply with GB/T 9088, its meaning is as follows: POU-OO-
The maximum diameter of the screw to be tightened or removed, expressed in Arabic numerals (specification code)
Design serial number, expressed in Arabic numerals
Design unit code
Self-tapping screwdriver (product code)
Power category code
Assembly operation category (major category code)
4 Technical requirements
General requirements
4.1.1 Self-tapping screwdrivers shall be manufactured according to drawings and technical documents approved by the prescribed procedures. 4.1.2 The screwdriver shall be able to operate at rated speed under the following environmental conditions. a) Altitude not exceeding 1000m;
b) Ambient temperature not exceeding 40℃;
c) Relative air humidity not exceeding 90% (25℃). 4.1.3 The power supply conditions applicable to self-tapping screwdrivers are: a) AC/DC dual-purpose self-tapping screwdrivers can operate at rated power under DC and single-phase AC power with actual sine waveform and rated frequency.
b) Single-phase series-excited self-tapping screwdrivers can operate at rated power under single-phase AC power with actual sine waveform and rated frequency.
4.1.4 Rated voltage and rated power:
a) AC rated voltage; 220, 42, 36V; b) DC rated voltage: 220V;
c) AC rated power: 50Hz.
Safety of self-tapping screwdrivers
The safety of self-tapping screwdrivers shall comply with the provisions of GB3883.2, except for the chapters and clauses that have been supplemented and improved in this standard. 4.2.2 The switch that changes the rotation direction of the screwdriver shall be marked. When the clutch position is adjusted to transmit the maximum torque and tighten the maximum specification screw, the handle structure of the self-tapping screwdriver should ensure that the operator can hold the tool reliably in his hand.
After the clutch of the self-tapping screwdriver is assembled, it should be able to be released smoothly. 4.2.5 The performance of the self-tapping screwdriver plug should comply with the provisions of GB2099.1. The self-tapping screwdriver plug of Class I structure should be made into one piece with the power cord, and its insulation should have a waveform of an actual sine waveform, a frequency of 50Hz, a voltage of 3750V, and a withstand voltage test lasting 1min. No breakdown or surface flashover should occur. 4.3
Appearance quality of self-tapping screwdriver.
The plastic shell of the self-tapping screwdriver shall not have serious defects such as bubbles, cracks, obvious paste spots and cold insulation. The metal shell of the self-tapping screwdriver shall not have obvious defects. The shell coating of the self-tapping screwdriver shall not have delamination and peeling. The nameplate of the self-tapping screwdriver shall be firmly and without curling on the surface of the screwdriver shell. 4.3. 4
4.4 The self-tapping screwdriver shall be designed with a screw threading depth adjustment device. When the screw is threaded to the predetermined depth, the clutch shall be automatically disengaged without transmitting torque.
JB/T5343-1999
The self-tapping screwdriver shall be equipped with an automatic positioning device for the self-tapping screws, and the screws shall be reliably adsorbed on the screwdriver to ensure that the self-tapping screwdriver4.5
does not cause the screw to fall off when used in any direction. The connection between the working head of the self-tapping screwdriver and the screwdriver shall be firm and reliable, and the disassembly and assembly of the screwdriver shall be simple and flexible. 4.6
4.7 Noise
The average value of the no-load noise sound pressure level (A-weighted) of the self-tapping screwdriver measured at the spherical surface 1000mm away from the center of the self-tapping screwdriver shall not exceed the provisions of Table 2.
When measuring the noise of a self-tapping screwdriver in a reverberation chamber, its sound power level (A-weighted) shall not exceed 95dB(A) and 97dB(A). Table 2 Noise allowable values
Noise limits
For self-tapping screwdrivers with counter-rotation, the measurement shall be made in the direction of operation that produces the maximum noise. 4.8
Electromagnetic compatibility
Radio and television interference levels
a) The continuous interference voltage level values of the phase or neutral line to the ground measured within the frequency range of 0.15 to 30MHz shall not exceed the allowable values specified in Table 3.
0.15~0.35
>0.35~5.00
>5.00~30.00
Continuous interference voltage
dB(μV)
The logarithm of the frequency decreases linearly
b) The continuous interference power level value measured by the power line radiation and absorption within the frequency range of 30~300MHz shall not exceed the allowable value specified in Table 4.
Continuous interference power
30~300
Harmonic current
a) The steady-state harmonic current of the self-tapping screwdriver shall not exceed the limit specified in Table 5. Table 5 Steady-state harmonic current limit
Odd spectrum
Channel number
15≤≤39bzxZ.net
dB(PW)
Increases linearly with frequency 45 to 55
Maximum allowable harmonic current
0.225X15/n
Even spectrum
JB/T5343-1999
Table 5 (End)
Channel number
8≤≤40
Maximum allowable harmonic current
0.345×8/n
b) For 2nd to 10th even harmonics and 3rd to 19th odd harmonics, the transient harmonic current value allowed not exceeding 15s in any 2.5min observation period is 1.5 times the steady-state harmonic current limit specified in Table 5. Voltage fluctuation and flicker
When the self-tapping screwdriver is connected to the low-voltage power grid, the voltage fluctuation and flicker caused by it should meet the following requirements: P. value should not be greater than 1.0;
P value should not be greater than 0.65;
steady-state relative voltage change d. should not exceed 3%; the maximum relative voltage change dma should not exceed 4%; the voltage change characteristic value d(t) should not exceed 3% in 300ms. If the voltage change is caused by a manual switch or the frequency is less than once per hour, P and P are not assessed. The steady-state relative voltage change value de, the maximum relative voltage change d, and the voltage change characteristic value d(t) should be multiplied by a coefficient of 1.33.4.9
Commutation spark
At rated voltage, the spark under the brush of the self-tapping screwdriver at no load and rated load should not be greater than level 2 specified in GB/T755. The reverse spark is allowed to be greater than level 2, but no ring fire shall be generated. 4.10
Input power and current
The measured input power of the self-tapping screwdriver under rated voltage and rated load shall not exceed 120% of the input power value indicated on the nameplate. If the rated current value is indicated on the nameplate, the measured current value under rated voltage and rated load shall not exceed 120% of the rated current value indicated on the nameplate.
4.11 Temperature rise
Under rated load, the temperature rise of the relevant parts of the self-tapping screwdriver shall not exceed the provisions of Table 6. Table 6
E-class insulation winding
B-class insulation winding
F-class insulation winding
Metal handles held continuously in normal use Housings not held in normal use
Material handles held continuously in normal use Buttons and similar parts
Note: When the altitude of the test site or the place of use is different from the specified environmental conditions, the correction of the winding temperature rise limit shall be carried out in accordance with the provisions of GB/T755. 4.12
Power cord length
The power cord length of the self-tapping screwdriver shall not be less than 2.5m. Rust prevention
The screws in the self-tapping screwdriver shall be surface treated, and the steel brush spring, grounding screw, washer and other parts shall be able to withstand the rust prevention test. 5
Test method
5.1 Appearance inspection
JB/T 5343 -1999
The appearance quality of the self-tapping screwdriver shall be inspected by observation and manual test. The inspection result shall comply with the provisions of 4.3.
5.2 Noise test
The noise test of the self-tapping screwdriver shall be carried out in accordance with the provisions of GB/T4583. Measurement of radio and television interference level
The radio interference level of the self-tapping screwdriver shall be measured in accordance with the provisions of GB4343. During the measurement, the self-tapping screwdriver shall be continuously operated without load with the screwdriver.
The measurement result shall comply with the provisions of 4.8.1.
5.4 Harmonic current measurement
The harmonic current measurement of the self-tapping screwdriver shall be carried out in accordance with the provisions of GB17625.1. During the measurement, the self-tapping screwdriver shall be continuously operated without load with the chuck.
The measurement result shall comply with the provisions of 4.8.2.
5.5 Voltage fluctuation and flicker measurement
The voltage fluctuation and flicker measurement of the self-tapping screwdriver shall be carried out in accordance with the provisions of GB17625.2. During the measurement, the self-tapping screwdriver shall be operated continuously without load with the chuck.
The measurement results shall comply with the provisions of 4.8.3.
Inspection of the screw-in depth adjustment device
First, adjust the screw depth adjustment nut of the self-tapping screwdriver to the maximum screw-in depth position. Then screw the self-tapping screwdriver into the wall material shown in Figure 1 until the clutch automatically disengages. Metal plate
Lime board or non-metallic insulation layer
The test results shall comply with the provisions of 4.4.
Inspection of automatic screw positioning
During the test, the cross slot of the self-tapping screw is adsorbed on the head of the screwdriver of the self-tapping screwdriver, and then the tool is started to screw one screw into the wall material shown in Figure 1 in the four directions of upward, downward, left and right. The test results shall comply with the provisions of 4.5.
Commutation spark inspection
After the self-tapping screwdriver runs at rated voltage for 15 minutes without load and during the test of 5.11, the spark under the brush shall be observed. The inspection test only checks the spark under no load.
The inspection result shall comply with the provisions of 4.9.
5.9 Input power, current and basic parameter measurement The self-tapping screwdriver applies torque at rated voltage so that its output power reaches the minimum value specified in Table 1. 5
JB/T 5343 -1999
When the temperature rise of the self-tapping screwdriver reaches the actual stable state, measure the input power, current, speed and output power values. When measuring the self-tapping screwdriver of Class I, care should be taken to keep the voltage at the plug of the self-tapping screwdriver at the rated voltage, and the input power should deduct the line loss between the plug and the power meter.
The test results shall comply with the provisions of 4.10 and 3.1. Temperature rise test
The self-tapping screwdriver is subjected to torque under rated voltage to make its output power reach the minimum value specified in Table 1, and then it is operated continuously. After the temperature rise of each part of the self-tapping screwdriver reaches the actual stable state, the temperature rise of the winding is measured by the resistance method, and the temperature rise of the housing and handle is measured by the thermometer method. During the test, the clutch and screwdriver of the self-tapping screwdriver are allowed to be removed. The test results shall comply with the provisions of 4.1.
The withstand voltage test of the plug of Class II self-tapping screwdriver is to attach a metal box to the handle on the outer surface of the plug, and then a withstand voltage test of 3750V is applied between the rod head and the rod foot and the metal box for 1 minute.
The test results shall comply with the provisions of 4.2.5.
Power cord length inspection
Measure the length of the flexible cable or cord between the power inlet of the self-tapping screwdriver and the plug (excluding the pins). The inspection results shall comply with the provisions of 4.12.
5.13 Assembly quality inspection of clutch release system Fix the static clutch of the release system, and then rotate it 360° in the direction of clutch rotation. If intermittent release sounds can be heard, the clutch is considered to be released successfully.
5.14 Any test methods not specified in this standard shall be carried out in accordance with the corresponding provisions of GB3883.2. 6 Inspection rules
6.1 Each self-tapping screwdriver must be inspected and qualified by the quality inspection department before it can be shipped out of the factory. When it leaves the factory, it shall be accompanied by documents proving that the product is of qualified quality. 2 The test items specified in this standard are type test items, among which the items marked with "*" are inspection test items, and those marked with "**" are non-standard test items.2
Items are not carried out during regular quality spot checks. Appearance inspection*
Marking inspection*
Electric shock protection inspection*
Clutch release system assembly quality inspection
Noise test
Radio and TV interference level measurement
Harmonic current measurement
Voltage fluctuation and flicker measurement
Inspection of the screw depth adjustment device
Inspection of the automatic screw positioning device
Starting test
Commutation spark test
Input power and current measurement
Temperature rise test
Leakage current test
Moisture resistance test
Insulation resistance measurement
Withstand voltage test*
Durability test
Abnormal operation test
Mechanical Hazardous tests
Mechanical strength inspection
Grounding device inspection
Structural inspection**
Internal wiring inspection
Component test and plug withstand voltage test
Power cord length inspection
Power connection inspection
Flexible cable or cord pulling force or torque testFlexible cable or cord and sheath bending**
Inspection of terminal blocks for external wires*￥
Inspection of screws and connections**
JB/T5343-1999
Inspection of creepage distance, electrical clearance and insulation penetration distance**Heat resistance, flame resistance and leakage current resistance test**6.3 Inspection method
6.3.1 The tests shall be carried out in the order of the items listed in Article 6.2. 6.3.2 Except for the parts that need to be provided (such as electric springs and screws for rust prevention test) for relevant tests, the other tests should be carried out on the same prototype, and the prototype and parts samples should pass all tests. If the prototype is disassembled for relevant tests, another prototype can be added. 1
Marking and packaging
7.1 Marking
Self-tapping screwdrivers should be marked with the following items:
a) Product name (electric self-tapping screwdriver); b) Model:
c) Rated voltage and power type symbol, ~V; d) Rated input power W, or current A;
e) Rated speed, r/min;
() Class II structure symbol (only for Class II structure self-tapping screwdrivers); g) Moisture resistance degree and symbol (marked only when required); h) Manufacturer name or trademark;
i) Factory batch code.
Note: Other marks may be added without causing confusion or misunderstanding. 2 Each self-tapping screwdriver shall be accompanied by the following documents when leaving the factory: 7.2
a) Product certificate;
b) Product use and maintenance instructions.
The use and maintenance instructions shall have an independent chapter to explain the safety and technical requirements for the use of the screwdriver, including matters that must be paid attention to during operation, possible dangers and corresponding preventive measures.
For self-tapping screwdrivers that change the direction of the screwdriver by changing the direction of rotation of the motor, it should be clearly stated that when changing the direction, the power must be cut off before the conversion.
Warranty period and accessories
JB/T5343 -1999
1 Warranty period
The warranty period of the self-tapping screwdriver shall be specified by the manufacturer if the user follows the provisions of the use and maintenance instructions of the self-tapping screwdriver manufacturer and uses, transports and stores the self-tapping screwdriver correctly. If the screwdriver is damaged or cannot work properly due to poor manufacturing quality, the manufacturer shall repair or replace it for free.
2 Accessories
A pair of screwdrivers and a power tool of corresponding specifications shall be attached when the self-tapping screwdriver leaves the factory. 8
People's Republic of China
Mechanical Industry Standard
Electric Self-tapping Screws
JB/T 5343 - 1999
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880×1230
Print Sheet X/X
Number of Words xXXx,xXX
Edition X, XX, 19XX
Printing X, XX, 19XX
Number of Prints 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn66 -
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