Stepped Micro Shaft
Two-diameter shouldered micro shaft for bearing and gear seats.
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 |
|---|---|---|---|---|---|
| MIKA-STP-15 | 1.5 | 20 | 2 steps | h6 | — |
| MIKA-STP-20 | 2 | 24 | 2 steps | h6 | — |
| MIKA-STP-25 | 2.5 | 28 | 2 steps | h6 | — |
| MIKA-STP-30 | 3 | 34 | 2 steps | h6 | — |
| MIKA-STP-35 | 3.5 | 38 | 2 steps | h6 | — |
| MIKA-STP-40 | 4 | 44 | 2 steps | h6 | — |
| MIKA-STP-45 | 4.5 | 50 | 2 steps | h6 | — |
| MIKA-STP-50 | 5 | 56 | 2 steps | h6 · ⌀5: 0/−0.008 | — |
| MIKA-STP-55 | 5.5 | 62 | 2 steps | h6 · ⌀5.5: 0/−0.008 | — |
| MIKA-STP-60 | 6 | 68 | 2 steps | h6 · ⌀6: 0/−0.008 | — |
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 Micro Shaft is a Micro & Watch Parts family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀1.5–6 mm, lengths 20–68 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 ⌀6 mm bar stock; its longest variant is MIKA-STP-60 at 68 mm. The family is produced by turning alone. All of it is completed in a single setup, without the part leaving the machine.
The most slender variant is MIKA-STP-15: 20 mm long at ⌀1.5 mm, a length-to-diameter ratio of 13.3. This ratio is the very reason sliding-head lathes exist. The guide bushing supports the bar immediately beside the cutting point, so there is no deflection; the same part chatters and drifts in diameter on a conventional lathe.
Variants are machined to h6 tolerance; the smallest is MIKA-STP-15 (⌀1.5 mm) and the largest MIKA-STP-60 (⌀6 mm). The family includes 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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