Röhm - Power chucks and cylinders - steady rests Page 63
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Power chucks without through-hole KFD APPLICATION Standard power chuck without through-hole for various clamping tasks. TYPE Power chuck available with cylindrical centre mount. 3-jaw version with serration 90° or tongue and groove. 2-jaw and 3-jaw version with serration 90° and weight reduction. CUSTOMER BENEFITS Long service life - all moving parts are hardened and ground High clamping precision thanks to proven wedge hook system TECHNICAL FEATURES - Power transmission by means of powerfully dimensioned wedge hook system Direct lubrication of the base jaws Starting from size 200 with roller for limiting the jaw movement The forward movement of the piston is stopped in the cylinder, movement toward the rear is stopped at the spindle or spindle flange Included in the scope of delivery: tongue and groove Chuck, chuck and jaw mounting screws (without top jaws) Included in the scope of delivery: serration Chuck, chuck and jaw mounting screws, slot nuts (without top jaws) 90° Gripping force/speed diagrams The loss of gripping force was determined experimentally on a chuck with matched UB top jaws. It is largely independent of the initial gripping force at zero speed. 200 KFD 315 180 KFD 315 shallow design 160 Lower curve: max. centrifugal force of top jaw 140 Total gripping force kN Upper curve: min. centrifugal force of top jaw KFD 250 120 100 KFD 200 80 KFD 160 60 40 KFD 130 1000 To obtain the specified gripping forces, the chuck must be in a perfect condition and lubricated with F 80 lubricant recommended by RÖHM. Measuring point near chuck face. 2000 3000 4000 5000 Speed min -1 400 360 320 KFD 630 KFD 500 280 Total gripping force kN KFD 400 240 200 160 120 80 40 200 400 600 www.eshop.roehm.biz 800 1000 Speed min -1 1200 1400 1600 1800 2000 6061 Power chuck without through-hole KFD 20
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