fortis Surface chuck DIN 69871ADBD 20 SK40

- Tool holder DIN 69871 Form AD/B
- Made of alloy case hardening steel
- Hardened 58 ±2 HRC, min. 0.5 mm deep
- Tensile strength in the core after case hardening approx. 950 N/mm²,
- Taper DIN 254
- Taper angle tolerance AT3
- Surface accuracy of the taper Ra <0.001 mm
- Bore
tolerance H5
- Concentricity <0.01 mm
- Balance quality G 6.3 15000 min-1
- For holding tools with cylindrical shank and lateral driving surface

Supply: Surface chuck with built-in clamping screw, from Ø 25 mm with two clamping screws.