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Stable Operation
When the punch retracts, “C” uses spindle “B” as a drive source. Fulcrum “A” is set on the transfer and moves “C” to the front of the dies.
The rack and pinion system chucks have gear backlash, and the grip is weak.
The lever “knuckle” chuck has little backlash. In addition, as a result of the knuckle having more leverage by being twice as long as the rack and pinion style, the grip is stronger.
The simple PFAS (short parts stopper) was developed to assist the transfer when chucking becomes difficult (shoulder parts, short parts, etc.) during forging.