Reducing Nipple
Stepped through-bored nipple joining two different metric threads.
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 |
|---|---|---|---|---|---|
| RAKB-RDN-08 | 9.2 | 19 | M5 · SW8 · ⌀3 | 6g | M6 → M5 mini reducer |
| RAKB-RDN-04 | 11.5 | 24 | M6 · SW10 · ⌀4 | 6g | M8 → M6 reducer; through bore |
| RAKB-RDN-12 | 11.5 | 22 | M5 · SW10 · ⌀3 | 6g | M8 → M5 reducer |
| RAKB-RDN-05 | 15 | 29 | M8 · SW13 · ⌀5 | 6g | M10 → M8 reducer |
| RAKB-RDN-09 | 15 | 27 | M6 · SW13 · ⌀4 | 6g | M10 → M6 reducer |
| RAKB-RDN-11 | 15 | 31 | M8x1 · SW13 · ⌀5 | 6g | fine-thread M10 → M8 reducer |
| RAKB-RDN-06 | 16.2 | 34 | M10x1 · SW14 · ⌀6 | 6g | M12 → M10 reducer |
| RAKB-RDN-10 | 16.2 | 30 | M6 · SW14 · ⌀3.5 | 6g | M12 → M6 large reducer |
| RAKB-RDN-07 | 19.6 | 32 | M8 · SW17 · ⌀5 | 6g | M12 → M8 large reducer |
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
Reducing Nipple is a Fittings family precision-turned on a Goodway SW-20, covering 9 variants — diameters ⌀9.2–19.6 mm, lengths 19–34 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 RAKB-RDN-06 at 34 mm. Besides turning, the family requires thread turning (5 sizes from M5 to M10x1), hex flat milling (AF 8–17) and axial drilling (⌀3–6 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 RAKB-RDN-06: 34 mm long at ⌀16.2 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 6g tolerance; the smallest is RAKB-RDN-08 (⌀9.2 mm) and the largest RAKB-RDN-07 (⌀19.6 mm). The family includes threaded, 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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