Big Mouth Dimensions

Standard Models for General Chucking Application

Chuck Model BP-200-52 BP-265-80 BP-315-105 BP-480-185 BP-500-230 BP-640-275 BP-800-375
Nominal Size 8” 10” 13” 19” 22” 25” 31”
Through Hole A 2.05 3.15 4.13 7.28 9.06 10.83 14.76
Face Diameter B 8.1 10.4 13.2 18.9 22.4 25.2 31.5
Rear Diameter C 11.8 14.6 14.6 20.9 22.4 27.0 33.5
Length D 5.3 5.8 6.2 8.8 8.8 10.3 12.0
Jaw Stroke/Jaw In. .165 .197 .197 .334 .334 .394 .472
Jaw Serration 1/16 x 90 1/16 x 90 1/16 x 90 3/32 x 90 3/32 x 90 3/32 x 90 3/32 x 90
Maximum Speed RPM 2800 2200 2200 1500 1300 1000 750
Max. Operating Pressure PSI 120 120 120 120 120 120 120
Grip Force @ 90 PSI Lbs. Total 13950 21400 19300 41860 44187 61600 61600

BT Series-Extended Jaw Stroke Models for Tubular Applications

Chuck Model BT 4.1 ES BT 7.3 ES BT 10.8 ES BT 12.8 ES BT 14.8 ES
Through Hole In. 4.13 7.28 10.82 12.80 14.76
Chuck Length In. 7.9 11.1 11.1 12.1 12.10
Jaw Stroke/Jaw In. 0.6 1.0 1.0 1.0 1.0
Jaw Serration 1/16 x 90 3/32 x 90 3/32 x 90 3/32 x 90 3/32 x 90
Swing Clearance In. 14.9 21.7 26.7 29.4 31.4
Maximum Speed RPM 2000 1300 1100 900 750
Normal Operating Pressure Range PSI 60-90 60-90 60-90 60-90 60-90
Max. Operating Pressure PSI 120 120 120 120 120
Weight Lbs. 220 500 700 1200 1300