Tapered Thread Transition Adapter
Transition adapter with a centering tapered body and an external thread at the tip.
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 |
|---|---|---|---|---|---|
| SOMB-KDA-01 | 8 | 19 | M4 · taper | 6g | tapered centring |
| SOMB-KDA-02 | 9 | 23 | M5 · taper | 6g | tapered centring |
| SOMB-KDA-03 | 10 | 24 | M6 · taper | 6g | tapered centring |
| SOMB-KDA-04 | 11 | 27 | M6 · taper | 6g | tapered centring |
| SOMB-KDA-05 | 13 | 28 | M8 · taper | 6g | tapered centring |
| SOMB-KDA-06 | 14 | 32 | M8 · taper | 6g | tapered centring |
| SOMB-KDA-07 | 16 | 32 | M10 · taper | 6g | tapered centring |
| SOMB-KDA-08 | 17 | 36 | M10 · taper | 6g | tapered centring |
| SOMB-KDA-09 | 18 | 37 | M12 · taper | 6g | tapered centring |
| SOMB-KDA-10 | 20 | 40 | M12 · taper | 6g | tapered centring |
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 Thread Transition Adapter is a Nuts & Adapters family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀8–20 mm, lengths 19–40 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 SOMB-KDA-10 at 40 mm. Besides turning, the family requires thread turning (6 sizes from M4 to M12) and taper turning. 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 SOMB-KDA-02: 23 mm long at ⌀9 mm, L/D 2.6. A short, rigid body: what governs the result here is not deflection but diameter tolerance and surface finish.
Variants are machined to 6g tolerance; the smallest is SOMB-KDA-01 (⌀8 mm) and the largest SOMB-KDA-10 (⌀20 mm). The family includes threaded, tapered, 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?
Other Families in This Category
Back to categorySimilar Parts in Other Categories
Let Us Create a Solution Tailored to Your Needs
Contact us to discuss your project; let's work out the most suitable solution together.