made in japan ballbearing for Automobiles

precision of cutting technology : ±5millimicron

pipe end forming: wall thickness 1.5mm

complete inspection facilities

from mold design to finished products ( in cooperation with skilled factory which provides cast metal , hammering , sintered material machining & heat treating and plating )

We can provide from a prototype to mass production in 24 hours. Please ask us also machining difficult to cut materials and cast metal. We offer flexibly small lot quantity and mass production ( outside diameter φ2.0mm~φ180mm , from one piece to 50,000 pieces )

< NC lathe turning >

Our core business is high precision processing technology of automotive components and

bearing components with more than 30 NC lathe turning. We offer flexibly small lot quantity and mass production ( outside diameter φ2.0mm~φ180mm , from one piece to 50,000 pieces )

< Parts machining for automotive industry >

We excel at special auto parts machining using our main facility , 2 spindle movement type CNC lathe turning by Okuma. Our special and sophisticated technology offer machining precision components in high mix low volume production.

< Centerless grinding >

We can offer mass production in combination with automatic supply system , because fixing of a grinding machine is unnecessary. We can grind with the high precision of a micron unit.

< Company information >

Marutaka seisakujo , the former of our company was established as a processing and manufacturing industry of air tool in 1964 , and started business with Ingersoll Rand U.S. We have been higly regarded with the processing technology, and have started a prototype of automotive components for head office of NSK Ltd., which is one of domestic leading company ( primary subcontract of automobile manufactures ), on a commission basis. In recognition of our quality , cost and delivery date , our new company Shinkosha Co., Ltd. which established in 1979 have begun mass production of automotive components for NSK Ltd.

Now Shinkosha deals with three factories of NSK as an excellent cooperation factory.