Achieves both high quality and productivity with advanced processing technology and one of the largest equipment in Japan
In-house processing
Cold heading

Cold heading (forging) is a processing technology that applies pressure to metal in a room temperature environment to form it into shape.
It is also called plastic working because it is processed by utilizing the plasticity of metal.
Arai Parts has more than 100 equipment including the 9-station parts former, which is the largest number in Japan, and has the advantage of being able to produce complex shaped products with cold heading only.
Plastic processing: To form a metal into a desired shape by utilizing the property that it cannot restore its shape when it is deformed by applying a certain force.
Thread rolling
Thread rolling is the process of sandwiching a work (product) between dies (molds) and rotating it relatively.
The advantage is that the processing time is extremely short compared to machining, and there is no cutting of metal fibers, so it yields high strength.
The surface roughness is also extremely smooth.

Screw processing

Groove processing

Shaft surface finishing

Pre-processing
Secondary processing
At Arai Parts, we support a wide variety of processing in close cooperation with reliable outsourcing partners and cooperating factories.
Even complex products can be delivered as finished products.

Machining, Grinding

Pressing

Groove, pre-processing

Hole tap