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Power chucks 3QLC-KS / 3QLK-KS
  • Larger through hole bore for handling larger diameter workpieces
  • Innovative (patented) multiple base jaw profile with improved guiding length for greater stability
  • Minimal loss of lubricating grease through gaps and undercuts, because jaw guides are precision ground, reducing maintenance and increasing consistency
  • Best possible clamping forces are obtained through multiple jaw guides
  • Improved lubrication with additional, integrated lubricant and improved forced circulation
  • Patented backlash free wedge hook mechanism for maximum clamping forces and highest repeatability
  • Centrifugal force compensation for highest speeds
  • Selected matching highest quality materials - all loaded, sliding surfaces are hardened and ground
  • Simplified construction of the guiding piston in the chuck
  • Axial Stroke limitation is integrated into the design of the chucks thus ensuring any over stroke of the cylinder is not problematic
  • Base Jaw serrations according to European and US specifications available as standard
  • MIR / ZMIR quick jaw change system optional

Power Chuck 3 QLC-KS

Power Chuck 3 QLK-KS

Dimensions and performance data 3QLC-KS / 3QLK-KS

Chuck Size
Type 3QLC-KS / 3QLK-KS 200-77 250-101 315-135 400-168
Dimensions
Outer diameter øA mm 210 257 320 400
Bore øB+0.1 mm 77 101 135 168
Chuck mounting øC mm Z6 Z8 Z11 Z15
Jaw mounting/DIN 6353 D S11 S11 S12 S12
Register Ø of draw tube B2H7 mm 85 112 140 173
Mounting recess EH6 mm 170 220 300 380
Actuator Ø F mm 97 123 153 190
Mounting bolts G M12 x 90 M16 x 95 M20 x 90 M24 x 80
Thread mounting G1 M90 x 2 M115 x 2 M145 x 2 M180 x 2
Puller thread protective sleeve G2 M5 M5 M6 M6
Chuck width H mm 90 90 98 98
Chuck width H1 mm 92 92 100 100
Thread length of mounting bolts J mm 20 22 22 30
Thread length of actuator J1 mm 24 24 24 24
Base jaw protrusion over chuck face J2 mm 5 5 6 6
Actuator stroke K mm 18.5 20 20 20
Actuator position K1 mm 18.5 20 20 20
Pitch circle Ø of Mounting bolts L±0.2 mm 133.4 171.4 235 330.2
Pitch circle Ø of protective sleeve L1±0.2 mm 100 129 173 210
Jaw stroke M mm 5 5.3 5.3 5.3
Position of master jaw Nmax mm 52.5 67.5 85 100.5
Jaw mounting bolts O M12 M12 M16 M16
Distance P1min mm 6 6 8 8
Jaw mounting bolts P1max mm 25 34 41 65
Distance P2min mm 25 25 32 32
Jaw mounting bolts P2max mm 44 53 65 89
Minimum distance P3 mm 19 19 24 24
Minimum distance P4 mm 10 10 10 10
Distance T-nut and serration P5 mm 2.5 2.5 2.5 2.5
Length of serrations P6 mm 52.5 61 75 99.5
Jaw width Q mm 35 35 45 45
Slot width imperial Q1H7 mm 17 17 21 21
Slot width metric Q1H7 mm 12 14 16 21
Width R mm 6.6 6.6 9.6 9.6
Pitch of serration / imperial T 1/16” x 90° 1/16” x 90° 1/16” x 90° 1/16” x 90°
Jaw mounting metric D MS12 MS14 MS16 MS21
Pitch of serration metric T 1.5 x 60° 1.5 x 60° 1.5 x 60° 1.5 x 60°
Distance from 1st serration T1 mm 1.5 1.5 1.5 1.5
Performance data
Max. actuating force Fmax daN 2500 4000 6000 6000
Max. gripping force Fspmax daN 6000 10000 15000 16000
Max. speed QLC-KS nmax 1/min 6300 5000 4000 3200
Max. speed QLK-KS nmax 1/min 5000 4200 3000 2800
Weight G kg 16 26 37 63
Moment of inertia QLC-KS kgm2 0.076 0.18 0.4 1.04
Moment of inertia QLK-KS kgm2 0.076 0.175 0.4 1.04
Chuck constants C1 mm 589 808 916 1186
C2 mm 248 322 398 497
C3 kgm 0.1 0.15 0.28 0.5
Values apply only for QLC-KS (QLK-KS = 0) C4 daNmin2 0.00017 0.00025 0.00044 0.00085
Ident–Number
Imperial serration QLC-KS D170130000 D168479000 D168480000 D168481000
Metric serration QLC-KS D168718000 D168719000 D168720000 D168721000
Imperial serration QLK-KS D170131000 D168576000 D168577000 D168578000
Metric serration QLK-KS D170132000 D168538000 D168539000 D168540000
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3QLC/QLK-Index QLC/QLK QLC-KS/QLK-KS 2QLC-LS/3QLC-LS QLC-AG Flansche
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FORKARDT INTERNATIONAL - an ITW WORKHOLDING company