Tapered Transition Hub
Bored hub with a conical transition giving a smooth stepless change between two diameters.
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 |
|---|---|---|---|---|---|
| KAPA-GCG-04 | 13 | 27 | taper · ⌀4 | H7 · ⌀4: +0.012/0 | tapered transition hub |
| KAPA-GCG-05 | 14 | 28 | taper · ⌀5 | H7 · ⌀5: +0.012/0 | tapered transition hub |
| KAPA-GCG-06 | 15 | 30 | taper · ⌀6 | H7 · ⌀6: +0.012/0 | tapered transition hub |
| KAPA-GCG-07 | 16 | 31 | taper · ⌀7 | H7 · ⌀7: +0.015/0 | tapered transition hub |
| KAPA-GCG-08 | 17 | 33 | taper · ⌀8 | H7 · ⌀8: +0.015/0 | tapered transition hub |
| KAPA-GCG-09 | 18 | 34 | taper · ⌀9 | H7 · ⌀9: +0.015/0 | tapered transition hub |
| KAPA-GCG-10 | 19 | 36 | taper · ⌀10 | H7 · ⌀10: +0.015/0 | tapered transition hub |
| KAPA-GCG-11 | 20 | 37 | taper · ⌀11 | H7 · ⌀11: +0.018/0 | tapered transition hub |
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
Tapered Transition Hub is a Couplings & Shaft Adapters family precision-turned on a Goodway SW-20, covering 8 variants — diameters ⌀13–20 mm, lengths 27–37 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 ⌀20 mm bar stock; its longest variant is KAPA-GCG-11 at 37 mm. Besides turning, the family requires taper turning. Bores in this family run ⌀4–11 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 KAPA-GCG-04: 27 mm long at ⌀13 mm, L/D 2.1. A short, rigid body: what governs the result here is not deflection but diameter tolerance and surface finish.
Variants are machined to H7 tolerance; the smallest is KAPA-GCG-04 (⌀13 mm) and the largest KAPA-GCG-11 (⌀20 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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