fortis Collet chuck JISB6339ADBBT40-ER32

- Tool holder JIS B 6339 (MAS-BT) 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
- To accommodate
tools with cylindrical shank in collets to DIN 6499 (ER)
- Concentricity <0.01 mm
- Balance quality G 6.3 at 15000 min-1