374 SMW-AUTOBLOK 375 SMW-AUTOBLOK 368 BB-EXL-SC2G 510-191 BB-EXL-SC2G 660-280 BB-EXL-SC2G 900-390 77784353 77784366 77784388 191 (7.52“) 280 (11.02“) 390 (15.35“) 38.5 (1.52“) 38.5 (1.52“) 38.5 (1.52“) 30 (1.18“) 30 (1.18“) 30 (1.18“) 8.5 (0.33“) 8.5 (0.33“) 8.5 (0.33“) 5 (73) 5 (73) 5 (73) 57 (12814) 114 (25628) - 82 (18434) 164 (36869) - 82 (18434) 164 (36869) 245 (55078) 1100 1000 680 37 92 125 318 (701) 500 (1102) 950 (2094) 14 36 117 BIG BORE® BB-EXL-SC2G INCH SERRATION Front-end spring clamp power chuck EXTRA large through-hole Ø 191 - 390 mm Application/customer benefits • End machining of long pipes / self centering clamping • Highest productivity / open and clamp time < 3 sec. • Low maintenance = High availability of the machine • Step mode for partial opening / clamping for shimming • Full spindle bore can be used Technical features • Self centering clamping with either 9 / 6 / 3 gas springs • Opening via integrated cylinder • Permanent grease lubricated for constant grip force • EXTRA long rapid and clamping stroke • Low air consumption • Stroke control • proofline® chucks = fully sealed - low maintenance Standard equipment Ordering example Chuck with mounting bolts Big Bore BB-EXL-SC2G 900-390 1 set of soft top jaws Id. No. 77784388 1 set of T-nuts and bolts Accessories Air control SMW-AUTOBLOK Type Id. No. Chuck through-hole mm (inch) Total stroke per jaw mm (inch) Rapid stroke per jaw* mm (inch) Clamping stroke per jaw mm (inch) Opening pressure with all springs bar (psi) Max. gripping force at 3 / 6 / 9 springs kN (lbf) Max. speed r.p.m. Air consumption to open at 5 bar (73 psi) liter Weight (without top jaws) kg (lbs) Moment of inertia kg·m2 * May not be used for clamping. Picture 1 Chuck open (only at stopped spindle). The SMW profile seal collapses radially under the air pressure and seals against the chuck body. The cylinder chamber is filled. The piston is compressing the springs, the jaws open. Technical data Picture 2 The SMW profile seal lifts off the chuck body due to elastic force. The springs expand and transmit their force onto the jaws via the wedge hook drive. The spindle can rotate. Picture 3 Stroke control. The position of the jaws can be monitored via a mechanical cam by 1 or 2 proximity switches. The reliable principle: Clamping via spring / opening via air cylinder End machining of tubes with front and rear chucks Rapid stroke / jaw Clamping stroke / jaw Slow movement Fast movement Extra long jaw stroke ■ Chuck size 510 - 900 ■ Clamping with gas springs ■ Extra long rapid and clamping stroke fully sealed – low maintenance proo ine® series BIS Specials Website: www.bisspecials.com Email: info@bisspecials.com Tel: (0031) 0313 482566 Website: www.bisspecials.com Email: info@bisspecials.com Tel: (0031) 0313 482566
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