Stepped Spacer Ring
Stepped spacer with two diameters seating inner and outer bearing races separately.
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 |
|---|---|---|---|---|---|
| RULA-KDM-06 | 12 | 11 | ⌀6 · 2 steps | h8 | bore ⌀6 |
| RULA-KDM-08 | 14 | 13 | ⌀8 · 2 steps | h8 · ⌀14: 0/−0.027 | bore ⌀8 |
| RULA-KDM-08L | 14 | 22 | ⌀8 · 2 steps | h8 · ⌀14: 0/−0.027 | bore ⌀8, long |
| RULA-KDM-10 | 16 | 14 | ⌀10 · 2 steps | h8 · ⌀16: 0/−0.027 | bore ⌀10 |
| RULA-KDM-10L | 16 | 26 | ⌀10 · 2 steps | h8 · ⌀16: 0/−0.027 | bore ⌀10, long |
| RULA-KDM-12 | 18 | 16 | ⌀12 · 2 steps | h8 · ⌀18: 0/−0.027 | bore ⌀12 |
| RULA-KDM-12L | 18 | 30 | ⌀12 · 2 steps | h8 · ⌀18: 0/−0.027 | bore ⌀12, long |
| RULA-KDM-14 | 19 | 17 | ⌀14 · 2 steps | h8 | bore ⌀14 |
| RULA-KDM-15 | 20 | 18 | ⌀15 · 2 steps | h8 | bore ⌀15 |
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 Spacer Ring is a Bearing & Seal Adapters family precision-turned on a Goodway SW-20, covering 9 variants — diameters ⌀12–20 mm, lengths 11–30 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 RULA-KDM-12L at 30 mm. The family is produced by turning alone. Bores in this family run ⌀6–15 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 RULA-KDM-12L: 30 mm long at ⌀18 mm, L/D 1.7. A short, rigid body: what governs the result here is not deflection but diameter tolerance and surface finish.
Variants are machined to h8 tolerance; the smallest is RULA-KDM-06 (⌀12 mm) and the largest RULA-KDM-15 (⌀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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