CNC turning
Shafts, sleeves, bushings and threaded parts with diameters, bores, grooves and faces arranged around a common axis.
Identify mating diameters, thread specifications and surface finish on the drawing.
From 1 piece
CNC Turning Services & Turn-Mill Machining
Custom shafts, bushings, sleeves and threaded parts, from one piece to repeat production. We review critical fits, material and inspection requirements with your drawing.
Central bore, circular hole patterns and machined side features.
Turning processes and working limits
Send the complete drawing; you do not need to choose the machine. We review the turned features, any milling operations and how the part will be held and measured.
Turning with milled features
Rotational parts with flats, cross-holes, slots or off-axis features. We review turn-mill and separate turning / milling setups around the datum relationships.
Send the complete part model so features on every face are included.
Swiss-type & small parts
Small-diameter pins, shafts and slender components have a separate Swiss-type machining route and equipment lineup.
See the dedicated small-part capability.
Swiss & micro machining →10CNC lathes
3Turn-mill machines
Part size is confirmed at engineering review; recorded envelopes include Ø350 × 400 mm (Tongtai) and Ø300 × 500 mm (Longbang) on different machines. These limits cannot be combined.
View CNC turning equipment and recorded machine limits
Machine specifications describe the equipment. Workholding, tool access, material and inspection requirements determine the usable part envelope and achievable tolerances.
| Machine / brand | Type | Quantity | Recorded diameter × length | Positioning accuracy | Listed machine accuracy |
|---|---|---|---|---|---|
| Hardinge EU51 | CNC lathe | 1 | Ø320 × 350 mm | 0.003 mm | 0.005 mm |
| Mazak QT100L | CNC lathe | 1 | Ø320 × 300 mm | 0.005 mm | 0.008 mm |
| Mazak QTE200L | CNC lathe | 2 | Ø300 × 300 mm | 0.005 mm | 0.008 mm |
| Shenyang | CNC lathe | 2 | Ø320 × 350 mm | 0.01 mm | 0.02 mm |
| Feeler | CNC lathe | 1 | Ø300 × 350 mm | 0.01 mm | 0.02 mm |
| Tongtai | CNC lathe | 1 | Ø350 × 400 mm | 0.008 mm | 0.02 mm |
| Longbang | CNC lathe | 2 | Ø300 × 500 mm | 0.005 mm | 0.008 mm |
| Hongxuan | Turn-mill | 1 | Ø260 × 350 mm | 0.01 mm | 0.01 mm |
| Longbang | Turn-mill | 2 | Ø300 × 500 mm | 0.005 mm | 0.008 mm |
ON THE SHOP FLOOR
Inside the turning workshop
CNC lathes, an operator at the workstation and a marked staging area for parts awaiting machining.
See turned-part case studiesFROM OUJI PRODUCTION
Turned parts and production records
These production records connect turning requirements with project-specific processes and evidence.
OPTICAL EQUIPMENT · 5083 ALUMINUM
5083 optical parts: consistent tool marks and brightness
Feed and tool selection were optimized to improve the surface result. Remaining nonconforming parts were reworked.
Drawing requirements & evidence scope
Consistent, bright machining marks across a 1,000-part order.
Approximate production figures are explained in the case record.
BALL-HEAD SCREW · 6063 ALUMINUM
6063 aluminum ball heads: 100,000 parts per month
Tool, program and feed optimization followed by walnut-media polishing established the production route. Photographed ball-diameter checks read 5.980 mm and 5.974 mm.
Drawing requirements & evidence scope
Ball diameter 5.970–6.000 mm, with a smooth surface free from scratches, steps and dents.
The photographs record individual diameter checks; monthly project volume is confirmed by OUJI.
ROBOT JOINT · HIGH-STRENGTH BRASS
A brass bushing, finished after graphite insertion
The published micrometer check reads 15.992 mm on the outside diameter. Graphite insertion was completed by a specialist partner; OUJI performed the initial and final turning.
Drawing requirements & evidence scope
Ø16 h7 OD, Ø8 H7 bore and 0.01 mm geometric controls on the drawing.
The displayed OD check does not verify every drawing characteristic.
PLANET CARRIER · 7075-T6 ALUMINUM
Turning and milling a 3,300-part gearbox order
Soft-jaw turning, a dedicated 12-position milling fixture and ZEISS CMM inspection formed the production route.
Drawing requirements & evidence scope
Datum-related fits and 0.01–0.02 mm geometric controls across turned and milled features.
This is a combined turning and milling case, not evidence of a single-setup turn-mill operation.
Materials and finishing for turned parts
The grade and condition matter as much as the material family. Include heat treatment, coating and final fit requirements so the quotation covers the finished component.
| Material family | Material scope | What to specify |
|---|---|---|
| Aluminum | 6061, 6063, 7075; see the 6063 ball-head and 7075-T6 planet-carrier cases. | State the temper, mating fits and any anodizing allowance. |
| Steel & stainless steel | Material grade and heat-treatment condition determine the route. | Identify hardness, corrosion requirements and dimensions to finish after treatment. |
| Brass & copper alloys | The published robot-joint bushing uses ZCuZn25Al6Fe3Mn3 high-strength brass. | Specify the alloy; a bearing brass is not interchangeable with a free-cutting brass. |
| Engineering plastics & other metals | Suitability is reviewed against the drawing and application. | Include operating temperature, fit requirements and any restrictions on substitution. |
Protect the final fit
Mark dimensions that apply after plating, anodizing or heat treatment. Identify surfaces to mask and any grinding or final turning needed after treatment.
SUS431 case: precision grinding and 100% bore inspection →Inspection of diameters and fits
Define acceptance requirements before production. Critical diameters, bore fits and datum-related features need an agreed measurement method and report scope.
Diameters, bores & threads
Identify mating fits, thread standards, engagement lengths and surface roughness. Mark dimensions that apply to the finished, treated part.
Runout & datum relationships
Show how turned surfaces relate to the axis and to later milled features. Datum references guide setup planning and inspection.
Reports agreed with your order
Dimensional, CMM and first article reports can be arranged to the agreed scope. Request material certificates and batch traceability during quotation.
Quality assurance & documentation →
Every part in this 2,000-piece turning and grinding order was inspected with a borescope after internal deburring.
View the case and 8.003 mm OD check →OUJI's inspection equipment includes ZEISS CMM, TESA height gauge and Mitutoyo roughness tester.
YOUR NEXT TURNED PART
Drawing review for turned parts
Share the part requirements and quantity for engineering and quotation review. Still working through a fit, material or production question? Start a conversation with project support.
Discuss your project first →01 / Part files
3D model and dimensioned drawing, with the current revision. Include threads, datums and critical fits.
02 / Order requirements
Quantity, material grade and condition, finishing, and required delivery date. Include expected repeat quantities if known.
03 / Acceptance documents
Tell us whether you need first article approval, dimensional reports, material certificates or full-dimensional inspection.
What happens next?
The drawing and process review establishes machining scope, inspection requirements, price and delivery. Open technical points are resolved before production.
Questions about CNC turning
Tolerances, batch consistency, thread inspection and the records available with your turned parts.OUJI has machined stainless steel, aluminum alloys and titanium alloys with total dimensional tolerance widths as narrow as 0.005 mm on selected features. For engineering plastics, a total tolerance width of 0.03 mm is achievable depending on part geometry. We use internal and external micrometers for diameters and dial indicators for runout. Pricing, special tolerances and the machining process require drawing review; complex parts also require a 3D model.