Valve Spring Pin
Shouldered spring pin that centers and guides the valve spring.
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 10 variants.
| Code | Diameter (mm) | Length (mm) | Feature | Tolerance | Std |
|---|---|---|---|---|---|
| VALA-YSP-04 | 6 | 20 | 3 steps | h9 | spring centring |
| VALA-YSP-05 | 7 | 23.5 | 3 steps | h9 | spring centring |
| VALA-YSP-06 | 9 | 27 | 3 steps | h9 | spring centring |
| VALA-YSP-08 | 11 | 31 | 3 steps | h9 | spring centring |
| VALA-YSP-08T | 11 | 25 | M5 | 6g | M5 threaded spring pin |
| VALA-YSP-10 | 13 | 35 | 3 steps | h9 | spring centring |
| VALA-YSP-12 | 15 | 39 | 3 steps | h9 | spring centring |
| VALA-YSP-14 | 17 | 43 | 3 steps | h9 | spring centring |
| VALA-YSP-16 | 19 | 47 | 3 steps | h9 | spring centring |
| VALA-YSP-18 | 20 | 51 | 3 steps | h9 | spring centring |
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
Valve Spring Pin is a Valve Parts family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀6–20 mm, lengths 20–51 mm, standard material Stainless Steel (also 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 ⌀20 mm bar stock; its longest variant is VALA-YSP-18 at 51 mm. Besides turning, the family requires thread turning (M5). 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 VALA-YSP-05: 23.5 mm long at ⌀7 mm, L/D 3.4. 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 h9, 6g tolerance classes; the smallest is VALA-YSP-04 (⌀6 mm) and the largest VALA-YSP-18 (⌀20 mm). The family includes threaded, multi-step 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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