
200,000 C3604 brass parts
The published production case records key-dimension and thread-depth sampling every 30 minutes.
Read the C3604 production case
SWISS SCREW MACHINING
Small turned parts in production quantities
Ø0.1 mm minimum diameter — feasibility depends on part length, material and features

OUJI is a precision turned parts supplier for pins, sleeves and shafts used in contact, guiding and fiber-optic applications. Send the drawing for your small precision turned parts so we can review the features and quantity.

Share the plunger or barrel drawing, material and plating requirements.
Discuss this part type
Include contact geometry, critical dimensions and the finished surface requirements.
Discuss this part type
Identify locating dimensions, mating fits and the required material.
Discuss this part type
Provide the holder or sleeve drawing and the dimensions needed for the assembly.
Discuss this part type
Specify stepped diameters, overall length and the critical features on the drawing.
Discuss this part typeOur main range is Ø0.1–10 mm. Swiss-type machining is also known as sliding head turning. Review part length, material and features with the drawing; the equipment limits below do not define a finished-part guarantee.
Specify the material grade and condition, then identify the dimensions and surfaces that matter after plating.
Include plating requirements and any dimensions that apply to the finished part in your inquiry.
Production batches start at 1,000 pieces; samples start at 100 pieces. For high volume orders, include annual demand as well as the first-batch quantity. OUJI uses KEYENCE optical measurement and operates under ISO 9001:2015. Specify the dimensions and inspection records required for your order.

The published production case records key-dimension and thread-depth sampling every 30 minutes.
Read the C3604 production case
The published STAR SP-23 case records a machining cycle reduced from 10 to 8 minutes per part.
Read the SUS420J2 thin-wall caseBRASS CONTACTS · PROCESS PHOTOGRAPHS
Follow tagged brass stock through Citizen R04VI machining, part collection and optical measurement. The photographs show the production route for small connector contacts.

Identify fits and surfaces that must meet the drawing after plating, heat treatment or other finishing. Include coating thickness, masking, surface roughness and burr requirements.
Surface finishing optionsSpecify the material standard, certificate type and any restrictions on substitutions. The documentation scope is agreed with your order.
Material certificates & traceabilityCritical dimensions, edge condition and handling matter at this scale. The inspection method and report scope are agreed around the drawing and finished-part requirements.
The first piece from a new setup is checked against the drawing before batch production. Critical dimensions and the inspection method are established at this stage.
In-process checks watch for dimensional drift, tool wear, burrs and handling damage. Small profiles can be measured on KEYENCE optical systems without a contact probe touching the feature.
Finished parts are checked against the agreed requirements. Specify which dimensions need recorded values, the report format and any material certificates when requesting a quote.
Quality assurance at OUJI
When choosing a CNC turned parts manufacturer, start with the drawing and expected quantities. These help define the machining, plating and inspection scope.
Send a dimensioned drawing and a model if available. Identify critical features, fits and any dimensions that apply after plating.
Include expected annual volume, first production batch and sample quantity. Production starts at 1,000 pieces; samples start at 100 pieces.
Specify material grade and condition, plating requirements, material certificate type and the traceability scope you need reviewed.
For small turned parts with slender profiles, related diameters and front or back features. OUJI reviews the complete drawing and quantity to select the machine, workholding and inspection method.
A dimensioned PDF or DWG drawing and a STEP model if available. Include the current revision, threads, datums, fits and burr requirements.
Stepped diameters, slender profiles and locating features. Show the mating fits, straightness and datum requirements on your drawing.
Small bores and lightly supported walls need a machining and inspection plan. Identify burr-sensitive edges and surfaces that must remain unmarked.
Sample orders for Swiss-type and micro machining start at 100 pieces. Include the expected production quantity with your sample inquiry.
Production from 1,000 pieces. Samples from 100 pieces. Include material and plating requirements so we can review the part.
Send drawing + annual volume