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Automotive Precision Parts — CNC Swiss Lathe Manufacturing

Injector pins, valve tappets, bearing bushings and more: ⌀3–20 mm automotive precision parts machined in steel, stainless, brass and aluminum to ±0.01 mm. 128 types plus custom sizes. Get a quote with your drawing.

Manufacturing Scope

Automotive precision parts are small-diameter turned components in engine, fuel, braking and sensor systems that must fit together to within microns. This category covers 14 families and 128 types: injector pins, valve tappets, rocker and camshaft pins, bearing bushings, piston gudgeon pins, valve guides, sensor bodies, ABS pins, connector pins, adjusting screws, brake piston tips, spacer bushings and valve stems. The parts are machined for automotive suppliers, engine reconditioners and equipment makers in steel, stainless steel, brass and aluminum. Depending on function we hold fit classes such as h6/H7 and tolerances down to ±0.01 mm, with surface hardening and low Ra roughness where required. Every part is CNC-turned on the Goodway SW-20 Swiss lathe in the ⌀3–20 mm bar range, in a single setup. Alongside the 128 standard types we also produce custom sizes from your technical drawing. The process is simple: send a drawing or sample, and we quote by material and quantity.

14 families128 types⌀3–20 mm4 materials
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Part Families

Injector PinPrecision cone-tipped pin guiding needle/valve motion in fuel injectors.8 types⌀4–10 mmOpen the code & size table →Valve TappetStepped cylindrical follower transferring camshaft motion to the valve.9 types⌀6–16 mmOpen the code & size table →Rocker Arm PinPivot pin bearing the rocker arm, threaded or knurled at the end.9 types⌀5–12 mmOpen the code & size table →Eccentric PinOff-center stepped pin for adjustable eccentric linkage.8 types⌀6–16 mmOpen the code & size table →Bearing BushBored, often flanged precision sleeve bush for shaft bearing.8 types⌀8–20 mmOpen the code & size table →Piston Gudgeon PinHollow hardened gudgeon pin connecting piston to connecting rod.8 types⌀4–16 mmOpen the code & size table →Valve GuideBored bush with press-fit outer diameter guiding the valve stem.8 types⌀5–16 mmOpen the code & size table →Sensor BodyThreaded precision body with through-bore for ABS/speed sensors.10 types⌀15–20 mmOpen the code & size table →ABS PinStepped hardened locating pin for ABS wheel-speed sensor.10 types⌀4–12 mmOpen the code & size table →Connector PinBrass conductive contact pin for automotive electrical connectors.10 types⌀3–12 mmOpen the code & size table →Adjusting ScrewFine-thread set screw with hex head for precision adjustment.10 types⌀8.1–19.6 mmOpen the code & size table →Brake Piston TipInternally threaded push tip with conical seat for caliper piston.10 types⌀8–20 mmOpen the code & size table →Spacer BushBored spacer bush for axial clearance setting in system assemblies.10 types⌀6–20 mmOpen the code & size table →Valve StemPrecision stem with conical seat for hydraulic/pneumatic system valves.10 types⌀5–14 mmOpen the code & size table →

Frequently Asked Questions

Which machine do you use to make automotive precision parts?

All parts are produced on a Goodway SW-20 CNC Swiss lathe. A sliding-headstock lathe cuts the bar right next to the guide bushing, which reduces deflection on long, slender parts; that is what makes tight tolerances and low surface roughness achievable on pins, bushings and shafts in the ⌀3–20 mm range.

Which materials do you work with?

Free-cutting and alloy steels, stainless steel (304/316 and similar), brass and aluminum are machined as standard. We advise on material based on the part's operating environment, steering you toward stainless or brass for corrosion, wear or conductivity needs. We also evaluate requests for special alloys.

What tolerances and precision can you achieve?

Depending on function we hold fit classes such as h6/H7 and tolerances typically around ±0.01 mm. For mating parts like bearing bushings and pins we confirm the assembly fit together from your drawing. Surface hardening and low Ra roughness values are provided where required.

Do you make custom sizes beyond the 128 standard types?

Yes. The 128 types are a reference; actual production follows your technical drawing. Within the ⌀3–20 mm range we manufacture custom parts to the dimensions, tolerances and material you specify. We can also reverse-dimension from a sample or a worn original part.

What is the minimum order quantity and lead time?

We have manufactured in Düzce, Turkey since 2009 and handle both prototype/sample quantities and series orders, with no fixed minimum imposed. Lead time depends on part complexity, material sourcing and quantity, and is stated clearly in the quote. Pricing is quote-based; we ship domestically and export.

Related Categories

Pins Bushings Shafts Fasteners Nuts & Adapters Spacers & Standoffs Fittings Nozzles Valve Parts Connector Pins Fixing & Locating Membrane Press Spares Custom Turned Parts Medical & Dental Parts Couplings & Shaft Adapters Bearing & Seal Adapters Electrodes & EDM Tips Opto-Mechanical Parts Textile Machine Parts Hydraulic & Pneumatic Pistons Mold & Die Components Joint & Pivot Elements Micro & Watch Parts
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