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Automotive Precision Parts — CNC Swiss Lathe Manufacturing

Injector pins, valve tappets, bearing bushings and more: ⌀1–20 mm automotive precision parts machined in steel, stainless, brass and aluminum to ±0.01 mm. 128

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 ⌀1–20 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.

Across 128 variants the operation mix is 32× thread turning, 22× hex flat milling, 63× axial bore, 29× taper turning, 8× knurling. Parts run 8–60 mm long; the longest, OTOA-VLK-16 at 60 mm, still finishes in a single setup.

Tolerances span 8 classes (6g, H7, h6, h7, h8, h9, js9, s6) and 121 variants carry a DIN or ISO reference. The highest length-to-diameter ratio in the category belongs to OTOA-INJ-04L at L/D 9 — slender enough to need tailstock support on a conventional lathe.

Every part is CNC-turned to your drawing — series, small batches and custom turned parts. Send your drawing (PDF/DWG/STEP) for a quote.

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 →

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 ⌀1–20 mm range.

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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