Threaded Reduction Bush (Female-Female)
Bored reduction bush with internal threads of different sizes tapped from each end.
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 7 variants.
| Code | Diameter (mm) | Length (mm) | Feature | Tolerance | Std |
|---|---|---|---|---|---|
| SOMB-RBC-01 | 9 | 10 | ⌀4.2 | 6H | bore M5 → M4 |
| SOMB-RBC-02 | 10 | 12 | ⌀4.2 | 6H | bore M6 → M4 |
| SOMB-RBC-03 | 11 | 12 | ⌀5 | 6H | bore M6 → M5 |
| SOMB-RBC-04 | 13 | 14 | ⌀6.8 | 6H | bore M8 → M6 |
| SOMB-RBC-06 | 15 | 16 | ⌀8.5 | 6H | bore M10 → M8 |
| SOMB-RBC-08 | 18 | 18 | ⌀10.2 | 6H | bore M12 → M10 |
| SOMB-RBC-10 | 20 | 20 | ⌀10.2 | 6H | bore M12 → M6 |
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
Threaded Reduction Bush (Female-Female) is a Nuts & Adapters family precision-turned on a Goodway SW-20, covering 7 variants — diameters ⌀9–20 mm, lengths 10–20 mm, standard material Brass (also steel, stainless steel 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-RBC-10 at 20 mm. The family is produced by turning alone. Bores in this family run ⌀4.2–10.2 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 SOMB-RBC-02: 12 mm long at ⌀10 mm, L/D 1.2. A short, rigid body: what governs the result here is not deflection but diameter tolerance and surface finish.
Variants are machined to 6H tolerance; the smallest is SOMB-RBC-01 (⌀9 mm) and the largest SOMB-RBC-10 (⌀20 mm). The family includes bored 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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