Stainless steel
303, 304, 316, 17-4PH
Precision shafts, pins, sleeves and medical components
MICRO MACHINING
Micro Machiningfor Small Precision Parts
Miniature shafts, pins, sleeves, inserts and connector components, with small-feature feasibility, burr control, handling and inspection reviewed against your drawings.
What is micro machining?
Micro machining is precision CNC turning for very small components such as shafts, pins, sleeves, inserts and connector contacts. The material is supported close to the cutting point to reduce movement and keep small features consistent.
OUJI operates 5 Citizen Cincom R04VI machines for parts up to Ø4 mm. Another 5 Japanese Star SL-10 machines extend the working range to Ø10 mm. Final tolerances and the machining plan are confirmed after drawing review.
- 5
- Citizen R04VI machines
- 5
- Star SL-10 machines
- Ø4 mm
- R04VI part diameter
- Ø10 mm
- Star SL-10 capacity
Micro machining size capabilities
Our equipment supports miniature turned parts up to Ø10 mm in diameter.
| Machine / typical parts | Quantity | Maximum size | Tolerance | Main / back spindle |
|---|---|---|---|---|
| Citizen Cincom R04VIMicro shafts, pins, sleeves, inserts and connector contacts | 5 machines | Ø4 × 40 mm | Typically ±0.005 mm | 20,000 rpm / 20,000 rpm |
| Star SL-10Small shafts, fittings and parts with cross or back-end features | 5 machines | Ø10 × 135 mm | Typically ±0.01 mm | 18,000 rpm / 12,000 rpm |
R04VI maximum length: 40 mm with a fixed guide bushing or 30 mm with a rotary guide bushing.
SL-10 maximum length: 135 mm with a stationary guide bushing or 105 mm with a rotary guide bushing.
Tolerances shown are typical targets. Final tolerance depends on material, feature size, part length and inspection method, and is confirmed after drawing review.
Materials for micro machining
The Citizen R04VI and Star SL-10 can machine common metal and engineering plastic bar stock. We select the machine, tooling and cutting parameters according to the part size, material and required features.
Carbon & alloy steel
1215, 12L14, 4140
Pins, fasteners, bushes and wear-resistant parts
Brass
C36000, C3604
Connector contacts, fittings, inserts and small valves
Copper alloys
C1100, C14500, phosphor bronze
Conductive pins, terminals and electrical contacts
Aluminum
2011, 6061, 7075
Lightweight sleeves, inserts and miniature housings
Titanium
Grade 2, Grade 5
Medical parts and high-strength miniature components
Engineering plastics
POM, PEEK, PTFE
Insulating bushes, sleeves and low-friction parts
Titanium, hardened materials and very small or thin-wall features require drawing review before tolerance and production feasibility are confirmed.
SWISS-TYPE APPLICATIONS
Where Micro Machining Creates the Most Value
Our R04VI and SL-10 machines are built for small-diameter parts, stable bar-fed production and closely related features.
HIGH-VALUE MICRO PARTS
Medical & Dental
Instrument shafts, sleeves and small dental components where clean features and inspection matter.
SMALL CONDUCTIVE PARTS
Electronics & Connectors
Contact pins, terminals, sleeves and miniature connector bodies for compact signal and power interfaces.
SMALL MOTION COMPONENTS