21" SMW FRONT MOUNTED CNC BIG BORE (8") PNEUMATIC OPERATED

Built in air cylinder eliminates draw tube. Versatile operation, O.
D./I.D. chucking, barwork.
Unobstructed spindle bore for maximum diameter work. Ideally suited
for oil field pipe
coupling work. Adjustable grip force for roughing or finishing. We
dge locked jaws, precise
repeatability.
Chuck diameter 540 mm (21.25")
Cylinder diameter 500 mm
Distributor ring diameter 570 mm
Chuck height 215 mm
Thru-hole 205 mm (8.07")
Adaptor plate pilot diameter H6 415 mm
Adaptor plate pilot diameter depth 8 mm
Bolt circle diameter 474 mm
Mounting bolt M 12
Distance from back face of distributor ring to face of back plate
20 mm
Face length 98 mm
Pneumatic connection R 3/8"
Minimum dimension from centerline of "T" nut to O.D. of master jaw
10 mm
Dimensions between "T" nut centerlines minimum 38 mm
Dimensions between "T" nut centerlines maximum 100 mm
Length of top jaw mounting surface 137 mm
Dimension from chuck centerline to leading edge of top jaw
mounting surface maximum 142 mm
T bolt M 18 (3/4" - 10 UNC)
T Bolt shoulder to master jaw face minimum 28 mm
Mounting bolt protrusion 27 mm
Dimension from face of back plate to centerline of air inlet 37 mm
Dimension between centerline of air inlets 26 mm
Width of master jaw mounting face 57 mm
Maximum speed with hardened reversible jaws 1300 RPM
Stroke per jaw 8.5 mm
Air consumption per actuation at 6 ATM 4.20 liter
Clamping force (6 ATM actuation pressure) 21,000 kp
Weight without top jaws 230 kg