Bored Micro Shaft
Precision micro shaft with an axial bore for lightweight sleeves.
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-BOR-20 | 2 | 16 | ⌀1 | H7 | — |
| MIKA-BOR-25 | 2.5 | 20 | ⌀1.2 | H7 | — |
| MIKA-BOR-30 | 3 | 24 | ⌀1.5 | H7 | — |
| MIKA-BOR-35 | 3.5 | 28 | ⌀2 | H7 | — |
| MIKA-BOR-40 | 4 | 32 | ⌀2 | H7 | — |
| MIKA-BOR-45 | 4.5 | 36 | ⌀2.5 | H7 | — |
| MIKA-BOR-50 | 5 | 40 | ⌀3 | H7 | — |
| MIKA-BOR-55 | 5.5 | 44 | ⌀3 | H7 | — |
| MIKA-BOR-60 | 6 | 48 | ⌀3.5 | H7 · ⌀3.5: +0.012/0 | — |
| MIKA-BOR-60L | 6 | 60 | ⌀4 | H7 · ⌀4: +0.012/0 | — |
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
Bored Micro Shaft is a Micro & Watch Parts family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀2–6 mm, lengths 16–60 mm, standard material Aluminium (also steel, stainless steel or brass). 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-BOR-60L at 60 mm. Besides turning, the family requires axial drilling (⌀1–4 mm). All of it is completed in a single setup, without the part leaving the machine.
The most slender variant is MIKA-BOR-60L: 60 mm long at ⌀6 mm, a length-to-diameter ratio of 10.0. 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 H7 tolerance; the smallest is MIKA-BOR-20 (⌀2 mm) and the largest MIKA-BOR-60L (⌀6 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?
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.