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Mizuhata Seiki
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Over 6 decades since 1944, Mizuhata Seiki specializes in gear hobbing of precision miniature custom gears and turned parts for gearbox, gear pump, spindle motors, miniature gear motor and precise positioning used in movement watches, IT electronic products and medical devices.

Our company defines gear pitch with module less than 0.8 mm and outside diameter OD less than ø25mm as micro-gears.

We are equipped with 27 units of gear hobbing machines that can manufacture fine pitch gears from module 0.12mm -module 1.25mm for AGMA, DIN and JGMA standards.

Gear Hobbing Capabilities:

• Spur gears, helical gears and hobbed components used in cameras, printers, gages, air-borne measuring instruments, knitting machines, endoscopes for surgical operation, sphygmomanometer, dialyzer machine, hydraulic robot mechanisms
• Spur gear with 0.12mm-1.00mm mod diametral pitch 200 - 25 DP
• Helical gear with 0.3mm-1.25mm module diametral pitch 85 - 20 DP
• Materials: Aluminum, Brass, Carbon steel S45C, Free Cutting Steel, SUS303 Stainless Steel
• Gear blank thickness 0.6mm-20.0mm
• Gear pitch circle diameter 2.2mm-25mm
• Heat treatment is available
• Tooth to tooth tolerance 2microns 
• Total composite error 10microns
• Customers: Epson Seiko, Konica Minolta, Fujitsu (FDK), Olympus

Gear Hobbing Machines:

• Kitai hobbing machine3A (module 0.8mm spur gear) -13
• Hamai hobbing 15A (module 1mm spur gear) ----1
• Hamai hobbing 40 (module 1mm spur gear) ------10
• Hamai hobbing 120 (module 1.5mm spur gear helical gear)---3
• Kitai Gear Rolling Tester --1

Email your gear drawing technical specification for our miniature gears and miniature gear hobbed components.