Drill chuck mounting
• Made of alloyed case hardening steel
• Hardened 58 ± 2 HRC, min. 0.5 mm deep
• Tensile strength in core after case hardening approx. 950 N/mm²
• Taper DIN 254
• Taper angle tolerance AT3
• Taper surface accuracy Ra < 1 µm
• Concentricity ≤ 0.01 mm
• Balancing quality G 6.3 at 15000 min-1
• Tool holder JIS B 6339 (MAS-BT)
• For mounting three-jaw drill chucks with inner taper according to DIN 238