Piston Gudgeon Pin
Hollow hardened gudgeon pin connecting piston to connecting rod.
This is a dimension schematic, not a manufacturing drawing. Dimensions match the catalog data; request a quote with the part code to confirm before production.
Code & Size Table
Code, dimensions and tolerance for all 8 variants.
| Code | Diameter (mm) | Length (mm) | Feature | Tolerance | Std |
|---|---|---|---|---|---|
| OTOA-GPN-04 | 4 | 16 | ⌀2 | h6 · ⌀4: 0/−0.008 | hollow, ground |
| OTOA-GPN-05 | 5 | 18 | ⌀2.5 | h6 · ⌀5: 0/−0.008 | hollow, ground |
| OTOA-GPN-06 | 6 | 22 | ⌀3 | h6 · ⌀6: 0/−0.008 | hollow, ground |
| OTOA-GPN-08 | 8 | 28 | ⌀4 | h6 · ⌀8: 0/−0.009 | hollow, ground |
| OTOA-GPN-10 | 10 | 34 | ⌀5 | h6 · ⌀10: 0/−0.009 | hollow, ground |
| OTOA-GPN-12 | 12 | 40 | ⌀6 | h6 · ⌀12: 0/−0.011 | hollow, ground |
| OTOA-GPN-14 | 14 | 46 | ⌀8 | h6 · ⌀14: 0/−0.011 | hollow, ground |
| OTOA-GPN-16 | 16 | 52 | ⌀9 | h6 · ⌀16: 0/−0.011 | hollow, ground |
Prices are for approved members.
Material & Tolerance
The standard material is listed below; also available in steel, stainless, brass and aluminium. Dimensions in mm; tolerances machined to ISO. Deviations (mm) are given for the nominal diameter according to the ISO 286-2 tables; thread tolerances (6g/6H) are to ISO 965. For custom sizes/tolerances, contact us with the part code.
Manufacturing Scope
Piston Gudgeon Pin is a Automotive Precision Parts family precision-turned on a Goodway SW-20, covering 8 variants — diameters ⌀4–16 mm, lengths 16–52 mm, standard material Steel (also stainless steel, brass or aluminium). Every variant's part code, dimension and tolerance is listed below; request a quote with the code you need.
The family is machined from ⌀16 mm bar stock; its longest variant is OTOA-GPN-16 at 52 mm. Besides turning, the family requires axial drilling (⌀2–9 mm). All of it is completed in a single setup, without the part leaving the machine.
The variant with the highest length-to-diameter ratio is OTOA-GPN-04: 16 mm long at ⌀4 mm, L/D 4.0. This ratio is achievable on a conventional lathe as well; the sliding-head advantage in series work is that the part never leaves the machine, so the size does not drift from variant to variant.
Variants are machined to h6 tolerance; the smallest is OTOA-GPN-04 (⌀4 mm) and the largest OTOA-GPN-16 (⌀16 mm). The family includes bored variants. Custom sizes, tolerances or materials are produced to the part code on request.
Need a size that isn't listed? We machine to your drawing — CNC contract machining. How these parts are made: What is a Swiss-type lathe?
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