Trusted Precision Grinders

Ultimate technology for top precision grinding and finishing

Koyo is a comprehensive manufacturer of high-precision grinding machines in the USA that are ideal for the mass production of precision components in various fields such as automotive, electronics, energy, appliance, medical, and construction. Koyo’s vast line-up of grinding machines can handle surface, centerless, and particular types of applications to meet all your grinding needs. Through mechanical and electrical engineering expertise, Koyo continues to re-examine the essential factors in grinding technology to improve performance and meet the demands of our ever-changing market. These factors include precision, efficiency, rigidity, stability, and automation. Our machines are custom-built to fit into your production line in accordance with the application you are using it for.


centerless grinder technology by Koyo Machinery USA

Koyo remains a world leader in centerless grinder technology by delivering reliability, high accuracy and improved grinding efficiency.

30/45/60 Series –
KC Series –


surface grinding solutions from Koyo Machinery USA

Koyo provides surface grinding solutions that accommodate single or double-sided grinding applications using vertical or horizontal spindles in single or double disc configurations.

R Series –
HD Series –
KVD Series –

Special Purpose

Special Grinder from Koyo Machinery USA

Koyo can meet your special grinding needs with O.D. Grinders, I.D. Grinders, Shoe Type Grinders, Internal Groove Grinders and more.

VG Series –
Shoe Type Centerless –
ID Grinders –
MG Series –
Wafer Grinder –
Roller Drive End Face Grinder –
Internal Groove –