Hollow / Grooved Shaft
Lightened functional drive shaft with an internal bore or a stepped groove along its length.
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 |
|---|---|---|---|---|---|
| MILB-HOL-01 | 6 | 30 | ⌀3 | h8 · ⌀6: 0/−0.018 | ⌀3 internal bore |
| MILB-HOL-02 | 8 | 35 | ⌀4 | h8 · ⌀8: 0/−0.022 | ⌀4 internal bore |
| MILB-HOL-03 | 8 | 42 | ⌀4.2 · 2 steps | h8 | M5 internal thread, stepped channel |
| MILB-HOL-04 | 10 | 40 | ⌀5 | h8 · ⌀10: 0/−0.022 | ⌀5 internal bore |
| MILB-HOL-05 | 10 | 65 | 3 steps | h8 · ⌀10: 0/−0.022 | central channel |
| MILB-HOL-06 | 12 | 45 | ⌀6 | h8 · ⌀12: 0/−0.027 | ⌀6 internal bore |
| MILB-HOL-07 | 12 | 75 | 3 steps | h8 | central channel |
| MILB-HOL-08 | 14 | 50 | ⌀7 | h8 · ⌀14: 0/−0.027 | ⌀7 internal bore |
| MILB-HOL-09 | 14 | 85 | ⌀6 · 3 steps | h8 | ⌀6 internal bore, central channel |
| MILB-HOL-10 | 16 | 55 | ⌀8 | h8 · ⌀16: 0/−0.027 | ⌀8 internal bore |
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
Hollow / Grooved Shaft is a Shafts family precision-turned on a Goodway SW-20, covering 10 variants — diameters ⌀6–16 mm, lengths 30–85 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 ⌀16 mm bar stock; its longest variant is MILB-HOL-09 at 85 mm. Besides turning, the family requires axial drilling (⌀3–8 mm). All of it is completed in a single setup, without the part leaving the machine.
The most slender variant is MILB-HOL-05: 65 mm long at ⌀10 mm, a length-to-diameter ratio of 6.5. A part this slender needs tailstock support on a conventional lathe. On a sliding-head lathe the guide bushing holds the bar right next to the cutting edge, so the part is machined without a centre.
Variants are machined to h8 tolerance; the smallest is MILB-HOL-01 (⌀6 mm) and the largest MILB-HOL-10 (⌀16 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?
Other Families in This Category
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