Copper Contact Bush
Knurled copper contact bush with internal thread conducting current to the electrode.
Manufacturing Scope
Copper Contact Bush is a Electrodes & EDM Tips family precision-turned on a Goodway SW-20, covering 9 variants — diameters ⌀8–18 mm, lengths 18–32 mm, standard material Brass (also steel, stainless, brass or aluminium). Every variant's part code, dimension and tolerance is listed below; request an instant quote with the code you need.
The family is machined from ⌀18 mm bar stock; its longest variant is ELEB-CBS-12 at 32 mm. Besides turning, the family requires knurling. Bores in this family run ⌀3.3–10.2 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 ELEB-CBS-04: 18 mm long at ⌀8 mm, L/D 2.3. A short, rigid body: what governs the result here is not deflection but diameter tolerance and surface finish.
Variants are machined to H7 tolerance; the smallest is ELEB-CBS-04 (⌀8 mm) and the largest ELEB-CBS-12 (⌀18 mm). The family includes knurled, bored, multi-step variants. Custom sizes, tolerances or materials are produced to the part code on request.
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 | Dia ⌀ | Length | Feature | Tolerance | Std | Unit price |
|---|---|---|---|---|---|---|
| ELEB-CBS-04 | ⌀8 | 18 mm | knurl · ⌀3.3 · 2 steps | H7 | M4 internal thread, knurled | 40.03 ₺ |
| ELEB-CBS-04S | ⌀8 | 18 mm | knurl · ⌀3.3 · 2 steps | H7 | M4 stepped internal thread, knurled | 38.57 ₺ |
| ELEB-CBS-05 | ⌀10 | 21 mm | knurl · ⌀4.2 · 2 steps | H7 | M5 internal thread, knurled | 46.78 ₺ |
| ELEB-CBS-06 | ⌀12 | 24 mm | knurl · ⌀5 · 2 steps | H7 | M6 internal thread, knurled | 55.39 ₺ |
| ELEB-CBS-06S | ⌀12 | 24 mm | knurl · ⌀5 · 2 steps | H7 | M6 stepped internal thread, knurled | 51.00 ₺ |
| ELEB-CBS-08 | ⌀14 | 27 mm | knurl · ⌀6.8 · 2 steps | H7 | M8 internal thread, knurled | 64.63 ₺ |
| ELEB-CBS-08S | ⌀14 | 27 mm | knurl · ⌀6.8 · 2 steps | H7 | M8 stepped internal thread, knurled | 58.76 ₺ |
| ELEB-CBS-10 | ⌀16 | 30 mm | knurl · ⌀8.5 · 2 steps | H7 | M10 internal thread, knurled | 75.53 ₺ |
| ELEB-CBS-12 | ⌀18 | 32 mm | knurl · ⌀10.2 · 2 steps | H7 | M12 internal thread, knurled | 86.01 ₺ |
Brass · for 100 pcs · estimated unit price, valid 7 days · excl. VAT · Contact us for a firm quote.
Material & Tolerance
The standard material is listed below; also available in steel, stainless, brass and aluminium. Dimensions in mm; tolerances machined to ISO. For custom sizes/tolerances, contact us with the part code.
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