1.
Impact energy: 4.5J
2.
Rebound hammer impact length: 75±0.3mm
3.
Needle friction force: 0.5±0.1N
4.
Needle length: 25±0.2mm
5.
Needle frication: 0.65±0.15n
6.
Stiffness of elastic pullback spring: 900N/m
7.
Elastic pullback spring length: 106mm
8.
Elastic hammer impact radius: SR45mm
9.
Riveting stake calibrate rate: 88±2