Stepped Hub
Multi-step shaft hub with a central bore.
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 |
|---|---|---|---|---|---|
| KAPB-KDG-01 | 8 | 28 | ⌀3 · 3 steps | h7 | M3 thread |
| KAPB-KDG-02 | 10 | 32 | ⌀4 · 3 steps | h7 | M4 thread |
| KAPB-KDG-03 | 12 | 34 | ⌀4 · 3 steps | h7 | M4 thread |
| KAPB-KDG-04 | 12 | 38 | ⌀5 · 3 steps | h7 | M5 thread |
| KAPB-KDG-05 | 14 | 40 | ⌀6 · 3 steps | h7 | M6 thread |
| KAPB-KDG-06 | 16 | 42 | ⌀6 · 3 steps | h7 | M6 thread |
| KAPB-KDG-07 | 16 | 48 | ⌀8 · 3 steps | h7 | M8 thread |
| KAPB-KDG-08 | 18 | 48 | ⌀8 · 3 steps | h7 · ⌀18: 0/−0.018 | M8 thread |
| KAPB-KDG-09 | 20 | 54 | ⌀10 · 3 steps | h7 | M10 thread |
| KAPB-KDG-10 | 20 | 60 | ⌀10 · 3 steps | h7 | M10 thread |
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
Stepped Hub is a Couplings & Shaft Adapters family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀8–20 mm, lengths 28–60 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 KAPB-KDG-10 at 60 mm. Besides turning, the family requires axial drilling (⌀3–10 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 KAPB-KDG-01: 28 mm long at ⌀8 mm, L/D 3.5. 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 h7 tolerance; the smallest is KAPB-KDG-01 (⌀8 mm) and the largest KAPB-KDG-10 (⌀20 mm). The family includes 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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