Pins & Shafts Suppliers

Zhejiangxinye Automobile Technology Co., Ltd. manufactures custom pins and shafts within the CNC machined components, sleeves and pins programme produced at our factory in Jiaxing Port Area, Zhejiang Province, China. Our production experience in automotive fasteners and machined parts reaches back to 1995, and the pins and shafts we build today are made to customer drawings for locating, alignment, retention and linkage duties in vehicle assemblies and industrial equipment.

Pins and shafts set the datum in an assembly. A locating diameter a few hundredths outside its band shows up downstream as excessive insertion force, a bracket that sits off-centre, or a fixture that will not repeat. We machine the stepped, two-step, ball-head and round-head forms in carbon steel, apply heat treatment and finishing to suit the duty, and inspect from raw material analysis through to finished-part mechanical performance testing.

Where Our Pins and Shafts Sit in the Product Programme

Pins and shafts are one of three groups in our CNC Machined Components, Sleeves & Pins family, alongside Sleeve Parts & Couplers and precision machined components. Keeping pins, sleeves and machined bodies inside one production chain matters where a pin seats into a sleeve or bushing bore: the fit is agreed as one assembly instead of two parts holding independent tolerances.

We operate as a China-based manufacturer of pins and shafts, producing against customer drawings rather than from a fixed catalogue list. Where a standard form is close but not exact, the drawing governs the head radius, step position, groove geometry and plating allowance, and we confirm those points back before a tool or process route is released.

Our Pins and Shafts Range

Custom Pins & Shafts Suppliers, Exporter — the range is built around four locating and connecting forms, each produced to drawing with its own head geometry, step configuration and finish.

Application Fit

Locating pins and shafts appear wherever two parts must reach a repeatable position before fastening: seat frames and seat adjustment mechanisms, interior trim and latch assemblies, body brackets, battery-pack module alignment, pedal and linkage pivots, and fixture plates. The pin carries the location; the fastener that follows only holds it.

• Press or transition fit: the housing bore tolerance, not the pin alone, decides the interference, so both are confirmed together.
• Retraction duty: the retracting step must clear the mating part through the full stroke without dragging on the bore.
• Articulating joints: ball-head studs accept angular movement where a plain pin would wear unevenly.
• Repeated assembly cycles: hardened surfaces resist fretting at the locating diameter.
• Corrosive exposure: plating thickness is allowed for inside the fit band, not added after it is fixed.

Materials, Heat Treatment and Surface Finishing

Carbon steel is the default material for locating pins and shafts in automotive assemblies, with grade and condition set by the load path: a protected interior locating pin carries different requirements from a pivot in a load-bearing linkage. Heat treatment runs on our own lines and is verified by hardness testing, with through-hardening or case-hardening applied where wear at the diameter governs service life.

Finishing is handled on our in-house surface finishing line, so corrosion performance is controlled at source rather than bought in as a subcontract step. Plated diameters are dimensioned to the finished condition, because a coating applied after the fit band is set changes the interference on a press-fit pin.

Critical Specifications We Machine To

• Locating diameter and band: the governing fit dimension, held within the 0.06 mm to 0.30 mm control range according to function.
• Step position and shoulder squareness: sets seated length and how squarely the mating part lands on the shoulder.
• Coaxiality between steps: runout between diameters converts directly into insertion force and bore wear.
• Head geometry: ball radius, head diameter and underhead fillet determine contact angle and stress concentration.
• Straightness and surface finish: specified on any length that slides rather than presses.
• Hardness and case depth: recorded where hardening is called out on the drawing.
• Lead-in chamfer: sized so automated insertion does not shave the bore edge.

Configuration and Assembly Integration

Configuration starts from the assembly, not from the pin. We confirm the mating bore, the insertion method, the retention method and the plating allowance, then fix the shank form, head form and tolerance band on the drawing that goes to production.

• Shank form: straight, single-step, two-step, threaded, grooved for a retaining ring, or with a retraction feature.
• Head form: round, ball, flat with chamfer, or a stepped form defined on the drawing.
• Retention: interference fit, circlip or retaining ring, thread and nut, or spring-return.
• Insertion: chamfer or radius at the entering end, agreed against the assembly method used on the line.
• Plating allowance: applied so the coated part, not the bare part, meets the fit band.

Quality Control and Acceptance

Production runs under an IATF 16949-2016 quality management system with documented work instructions for special and critical processes. Incoming material is analysed before release to production, in-process checks run at each operation, and finished parts go through mechanical performance and hardness testing. Our work safety standardization and environmental management system certifications cover the wider manufacturing operation.

Inspection characteristics, gauging method and record format are fixed against the drawing revision at quotation stage, so the part is judged by the same standard on the first delivery and on later call-offs.

Information We Use to Configure Your Solution

A pin or shaft proposal is only meaningful when the fit, the duty and the volume are known together. These are the inputs we work from and the decisions each one fixes.

Where a dimension is left open, we state the band we propose and the reason behind it, so the drawing released for production matches what the assembly actually needs.

Frequently Asked Questions

What pin and shaft types does Xinye manufacture?

We produce stepped retraction locating shaft pins, two-step cylindrical locating pin shafts, stepped ball head connecting stud pins and round head locating pins, together with non-standard forms defined by customer drawing. Each type is machined to the head geometry, step configuration and finish required by the assembly rather than to a single catalogue size.

Can you produce to our drawing and material specification?

Yes. Material grade, heat-treatment condition, hardness, plating and tolerance band are taken from the drawing and confirmed back in the quotation, including the points where we propose a specific band or a change to the plating allowance.

What tolerance can you hold on locating diameters?

Our tolerance control spans a 0.06 mm to 0.30 mm band, selected per feature. The band applied to a locating diameter depends on whether the fit is press or sliding, the coating thickness, the length-to-diameter ratio and the gauging method, and it is confirmed on the drawing before production.

Which finishes are available for corrosion protection?

Trivalent zinc plating at approximately 480 h salt spray and zinc-nickel alloy plating at 480–720 h are both applied on our in-house finishing line. Where the plated diameter is the fit dimension, the machining allowance is adjusted so the coated part meets the band.

How is quality verified from raw material to shipment?

Incoming material is analysed before release, special and critical processes carry written work instructions, in-process inspection runs at each operation, and finished parts are checked by hardness and mechanical performance testing under our IATF 16949-2016 system.

What information do you need to quote a pin or shaft?

The drawing revision, material and heat-treatment condition, mating bore and fit type, critical dimensions, plating specification, annual volume with call-off pattern, retention method and packaging requirements. With those inputs we can state the process route, the tolerance band and the inspection plan together.