GBP 57 G 6.3 ≤5µm JIS ISO Form 15000 HPC B6339 7388-2 AD min-1 ​Heavy-duty chuck − JIS B6339 (MAS-BT) ■ Low friction due to needle bearings. ■ Protected with anti-corrosion coating. ■ Dust-tight and watertight. ■ Very high clamping force prolongs tool life and improves surface quality. ■ Flexible clamping range by means of collets. 30 2861 – ■ Clamping force up 1000 Nm at ⌀ 20, 4000 Nm at ⌀ 32. 30 2861 30 2865/2870 – ■ Clamping force up to 1000 Nm. Advantage: 30 2861 – ■ Long tool life. ■ Vibration damping properties. ■ High stability due to strengthened clamping nut. Application: For clamping tools with plain shanks. Supplied with: Clamping nut Optional extras: C wrench No. 628400. 30 2865 Pull studs No. 308760 − 308795. 30 2861 – Collets No. 309575 − 309576. 30 2865/2870 – Collets No. 309566 − 309570. Internal axial recesses effectively prevent the tool slipping. T-slots take up the oil and grease so that reliable torque transmission is achieved. Absolutely smooth running of the clamping nut. High radial stiffness due to repeatable clamping accuracy against a flat face, which prevents misalignment and ensures highly accurate machining coupled with long tool life. ⌀ D1 mm 20 32 30 2861 BT 40 (eShop) (eShop) 32A 32A 33K 30 2865 Heavy-duty chuck BT 40 eShop eShop 30 2870 BT 50 eShop eShop 30 2861 Dimension A mm 90 105 ⌀ D (30 2861) mm 52 73 ⌀ D (30 2865, 30 2870) mm 52 66 Suitable C-hook (pin) spanner No. 628400 52 / 55 68 / 75 G 6.3 ≤8µm DIN JIS ISO Form 15000 6383 B6339 7388-2 AD min-1 Reducing adapters for tools with MT shank − JIS B 6339 (MAS-BT) Ground internally and externally. Application: For clamping tools with MT shank. Optional extras: Pull studs (PS) No. 308760 − 308806. D A For MT tools with tang to DIN 228-B ​ 30 30 3082 MT internal 1 2 3 4 Reducing adapter SK / MT 30 3082 BT 40 eShop eShop eShop eShop 32A for tangs, form AD Dimension A mm 50 50 70 95 ⌀ D mm 25 32 40 48 993