Screw Torque Definition and Examples

Select the torque range with the empirical value, set the minimum screw torque with the electric screwdriver, and then use the manual method to turn the screw to check whether the torque of the screw is sufficient. If it is no longer possible to manually turn the screw, it means the torque of the screw can be Accept, lock 10PCS to confirm whether the lock is in place for the first time. If it is locked in place, then the torque is reduced according to 0.05kgf-cm. Repeat the verification. The lock is not in place. The torque is unacceptable. The last lock is OK. Minimum torque; if it can still be rotated, it means that the minimum torque is not enough, it must be increased. After repeated tests, the minimum electric torque can be determined.



After the minimum screw torque is determined, according to the torque range, the torque of the electric screwdriver is set to the maximum value of the torque range, and 10 sets of upper and lower covers (or upper and lower shells) are used, and the electric screwdriver is repeatedly locked and loosened. After opening the screw 10 times, confirm whether there is any screw hole slip or screw column rupture. If not, repeat the verification according to the 0.05kgf-cm torque increment. If the screw hole slips or the screw column breaks badly, A lock with OK torque is the maximum torque; if it is, you must reduce the torque or design the inner and outer apertures of the screw column, and then repeat the verification.



It is best to use the torque definition: after determining the maximum and minimum torque, multiply the maximum torque by the safety factor of 0.4---0.6; the value is the best to use the torque; and the torque must be greater than the minimum lock torque, according to the actual approach The maximum and minimum equilibrium mean is the best;



for example:

Screw specifications: SCREW, BZn+Ni, T1.7*4, P0.5, PH3*0.5, +

Locking aperture: 1.34-1.36mm

Locking material: PC+10%GF

Locking depth: 2.2mm

Preliminary definition of torque range 0.8---2.0kgf-cm

Minimum torque gain:

Item	Minimum locking torque	0.80 appears slightly floating
1	0.85
2	0.85
3	0.85
4	0.85
5	0.85
6	0.85
7	0.85
8	0.85
9	0.85
10	0.85

Minimum and maximum torque range: 0.85---2.10kgf-cm
The definition of normal best lock torque is obtained: 2.1*(0.4---0.6)=0.84----1.26
The minimum torque is: 0.85
Maximum and minimum average: (0.85+2.10)/2=1.475
The best lock torque for normal is: 1.25+/-0.05kgf-cm or 1.25+/-0.1kgf-cm



Dongguan Changan Key Electronics Factory was established in 2003 and is located in the world factory - Dongguan. It integrates R&D, production and sales, and has two brands: “STAROBOT robot” and “ELET Yilite”. Products are: automatic soldering machine | soldering robot | automatic soldering machine | torque meter | torque tester | cap torque tester | automatic soldering iron head | non-standard soldering iron head | special soldering iron head | custom soldering iron head | soldering iron head | Screw machine|screw automatic lock machine|automatic dispensing machine|


STAROBOT manipulator - the leading brand of automation equipment in China. Production of automatic soldering robots, screw fastening automation, dispensing automation, automatic soldering iron tips and various soldering iron tips.
ELET - the leader of precision torque. Production Torque Tester, Electric Torque Tester, Hydraulic Pulse Torque Tester, Cap Torque Tester, Automatic Cap Torque Tester, Screw Torque Tester, Shaft Torque Meter, Lamp Torque Tester, Split Torque Tester .


With our experienced industry experience, we are the general agent of Quantum Data Video Maker in the United States. Since the establishment of the company, we have always adhered to: customer orientation, quality first, automated process, the pursuit of excellence! In the field of automation and mechanical instrumentation, we set the benchmark for the industry and become the world's leading quality spokesperson.





The above materials are provided by Mo Mengping 0769-85492889, Dongguan Changan Key Electronics Factory.













Dongguan Changan Key Electronics Factory
Dong Guan Key Electronics Co. Ltd

TEL: (0769) 85492889 13537040198

FAX: (0769) 85393191

Address: 2nd Floor, Xingfa, Changshi Science and Technology Park, 6th Industrial Zone, Wusha Liwu, Chang'an Town, Dongguan City, Guangdong Province: B1019, Area A, 1st Floor, Mingsha Electronics Square, Changsha Town, Dongguan City

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PRODUCT APPEARANCE: White Powder

CHEMICAL CLASS:AlH₂P₃O₁₀ Â· 2H₂O

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Residueon sieve% 325-1250mesh	≤0.5
PH %	3-5
Oil absorption	30±5
P2O5%	60-70
Al2O3%	20-30
Standard	Q/84XS02-2004

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