Precision Grinders

Ultimate technology for top precision grinding and finishing

Koyo is a comprehensive manufacturer of high-precision grinding machines 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.


Photo of Centerless Grinder

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

30/45/60 Series –
KC Series –


Photo of a Surface Grinder

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

Photo of a Special Grinder

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 –