Hex Drive Coupling Adapter
Coupling adapter with a bored cylindrical body and hex drive end turned by a spanner.
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 9 variants.
| Code | Diameter (mm) | Length (mm) | Feature | Tolerance | Std |
|---|---|---|---|---|---|
| KAPA-HKA-03 | 11.5 | 20 | SW10 · ⌀3 | H7 | hex coupling adapter |
| KAPA-HKA-04 | 11.5 | 22 | SW10 · ⌀4 | H7 · ⌀4: +0.012/0 | hex coupling adapter |
| KAPA-HKA-05 | 15 | 24 | SW13 · ⌀5 | H7 · ⌀5: +0.012/0 | hex coupling adapter |
| KAPA-HKA-06 | 15 | 26 | SW13 · ⌀6 | H7 · ⌀6: +0.012/0 | hex coupling adapter |
| KAPA-HKA-07 | 16.2 | 28 | SW14 · ⌀7 | H7 · ⌀7: +0.015/0 | hex coupling adapter |
| KAPA-HKA-08 | 16.2 | 29 | SW14 · ⌀8 | H7 · ⌀8: +0.015/0 | hex coupling adapter |
| KAPA-HKA-09 | 17.3 | 31 | SW15 · ⌀9 | H7 · ⌀9: +0.015/0 | hex coupling adapter |
| KAPA-HKA-10 | 19.6 | 34 | SW17 · ⌀10 | H7 · ⌀10: +0.015/0 | hex coupling adapter |
| KAPA-HKA-11 | 19.6 | 37 | SW17 · ⌀11 | H7 · ⌀11: +0.018/0 | hex coupling adapter |
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
Hex Drive Coupling Adapter is a Couplings & Shaft Adapters family precision-turned on a Goodway SW-20, covering 9 variants — diameters ⌀11.5–19.6 mm, lengths 20–37 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 KAPA-HKA-11 at 37 mm. Besides turning, the family requires hex flat milling (AF 10–17). Bores in this family run ⌀3–11 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-HKA-04: 22 mm long at ⌀11.5 mm, L/D 1.9. 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-HKA-03 (⌀11.5 mm) and the largest KAPA-HKA-11 (⌀19.6 mm). The family includes hex-drive, 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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