Injector Pin
Precision cone-tipped pin guiding needle/valve motion in fuel injectors.
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-INJ-04 | 4 | 21 | taper | h6 · ⌀4: 0/−0.008 | needle tip 60° |
| OTOA-INJ-04L | 4 | 36 | taper | h6 · ⌀4: 0/−0.008 | long body |
| OTOA-INJ-05 | 5 | 26 | taper | h6 · ⌀5: 0/−0.008 | — |
| OTOA-INJ-06 | 6 | 32 | taper | h6 · ⌀6: 0/−0.008 | needle tip 60° |
| OTOA-INJ-06H | 6 | 32 | taper · ⌀2 | h6 · ⌀6: 0/−0.008 | axial lubrication hole ⌀2 |
| OTOA-INJ-08 | 8 | 40 | taper | h6 · ⌀8: 0/−0.009 | — |
| OTOA-INJ-08D | 8 | 44 | taper · ⌀3 | h6 · ⌀8: 0/−0.009 | internal channel ⌀3 |
| OTOA-INJ-10 | 10 | 52 | taper | h6 · ⌀10: 0/−0.009 | needle tip 60° |
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
Injector Pin is a Automotive Precision Parts family precision-turned on a Goodway SW-20, covering 8 variants — diameters ⌀4–10 mm, lengths 21–52 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 ⌀10 mm bar stock; its longest variant is OTOA-INJ-10 at 52 mm. Besides turning, the family requires taper turning and axial drilling (⌀2–3 mm). All of it is completed in a single setup, without the part leaving the machine.
The most slender variant is OTOA-INJ-04L: 36 mm long at ⌀4 mm, a length-to-diameter ratio of 9.0. A part this slender needs tailstock support on a conventional lathe. On a sliding-head lathe the guide bushing holds the bar right next to the cutting edge, so the part is machined without a centre.
Variants are machined to h6 tolerance; the smallest is OTOA-INJ-04 (⌀4 mm) and the largest OTOA-INJ-10 (⌀10 mm). The family includes tapered, bored, 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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