To produce bolt, two machines are necessary--Cold-heading Machine and Thread Rolling Machine:
1. Cold-heading Machine
To cut raw material wire according to length of finished bolt and form bolt head.
Main Technical Parameter:
Model No | Dia. of Nail(mm) | Length of Nail(mm) |
Z12-3 | 1.2-3 | 2-16 |
Z12-4 | 2-4 | 6-48 |
Z12-5 | 2-5 | 6-60 |
Z12-8 | 4-8 | 10-100 |
Z12-10 | 6-10 | 20-120 |
Z12-16 | 10-16 | 25-150 |
2. Thread Rolling Machine
To roll thread on blank shank of bolt after being cold-headed.
Main Technical Parameter:
Model | Dia. of Threading(mm) | Length of Threading(mm) | Length of Screw(mm) |
Z25-4 | 2-4 | 6-25 | 6-25 |
Z25-5 | 2-5 | 6-50 | 6-50 |
Z25-6 | 2-6 | 6-60 | 6-80 |
Z25-6L | 2-6 | 6-60 | 6-100 |
Besides the above two machines, another machine is optional---Edge Trimming Machine
3. Edge Trimming Machine
To make Hex. head after being cold headed.
