Plunger Piston
Plunger piston body with precision-ground cylindrical sealing surface.
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 |
|---|---|---|---|---|---|
| HIDA-DLP-06 | 6 | 24 | taper | h6 · ⌀6: 0/−0.008 | tapered plunge tip |
| HIDA-DLP-08 | 8 | 30 | taper | h6 · ⌀8: 0/−0.009 | — |
| HIDA-DLP-10 | 10 | 36 | taper | h6 · ⌀10: 0/−0.009 | — |
| HIDA-DLP-10D | 10 | 35 | ⌀4 | h6 · ⌀10: 0/−0.009 | ⌀4 relief bore |
| HIDA-DLP-12 | 12 | 42 | taper | h6 · ⌀12: 0/−0.011 | — |
| HIDA-DLP-12T | 12 | 44 | M8 | h6 · ⌀12: 0/−0.011 | M8 rear connection |
| HIDA-DLP-14 | 14 | 48 | taper | h6 · ⌀14: 0/−0.011 | — |
| HIDA-DLP-16 | 16 | 54 | taper | h6 · ⌀16: 0/−0.011 | — |
| HIDA-DLP-18 | 18 | 60 | taper | h6 · ⌀18: 0/−0.011 | — |
| HIDA-DLP-20 | 20 | 67 | taper | h6 · ⌀20: 0/−0.013 | max dia AF20 |
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
Plunger Piston is a Hydraulic & Pneumatic Pistons family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀6–20 mm, lengths 24–67 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 HIDA-DLP-20 at 67 mm. Besides turning, the family requires thread turning (M8), taper turning and axial drilling (⌀4 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 HIDA-DLP-06: 24 mm long at ⌀6 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 HIDA-DLP-06 (⌀6 mm) and the largest HIDA-DLP-20 (⌀20 mm). The family includes threaded, 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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