Koyo High Precision Co., Ltd. HOME

Specializing in Machining, Prototyping and Mass Production of High-Precision Components Since 1951

For over 70 years, Koyo High Precision has earned the trust of high-tech organizations by supplying customer specific high-precision machined metal parts.

Industries served include:

Medical
Semi-conductor
Industrial
Automotive

A Million Piece per Month Production Capacity

1st bullet point- "We accept small volume orders starting from one piece while still providing high-precision mass production of over a million pieces and give each order the quality assurance it deserves"
Manufacturing capabilities include 30 machining centers with over 200 CNC machines that provide a production capacity in excess of 1,000,000 pieces per month

Difficult-to-Cut Materials

Stainless steel
Brass
Aluminum
Tungsten (W)
MAT21

Molybdenum (Mo)
Tantalum (Ta)
Niobium (Nb)
Hastelloy

Inconel
Permalloy
Alloy 42
Kovar

Nickel
Silver
Copper
Platinum

... and many more

High-Precision Machining

±0.003mm (±0.00011″) tolerances on Tungsten
Nozzle with outer diameter 0.2mm (0.0079″) and inner diameter 0.15mm (0.006″) on Pt
Through hole φ0.2mm (0.0079″) length 40mm (1.57″) on Hastelloy

Examples of Koyo’s Machined Parts (Unit: mm)

Optical

Platinum Microfabrication
Application:	Nozzles for glass lens refining equipment (camera lenses for facial recognition system)
Material:	90％ Pt, 10％ Au
Tolerance:	Tip shaft φ0.2 (+0.03/0) Tip holeφ0.15 (0/-0.03)

Pure Tungsten Precision Machining
Application:	Lamps for movie theaters
Material:	Pure Tungsten
Tolerance:	Inner φ±0.003

Medical Equipment

Molybdenum Pipe Machining
Application:	Debridement wound instrument
Material:	Molybdenum
Tolerance:	Outer φ0.45 (+0.03/0) Inner φ0.4 (0/-0.03)

Pure Tungsten Ultra-Thin Machining
Application:	Endoscope precision component to determine accurate instrument location
Material:	Pure Tungsten
Tolerance:	Outer φ8.6 (+0.03/0) Inner φ8.5 (0/-0.03)