BIG BORE ® BB-N-ES INCH SERRATION
Front-end pneumatic power chuck EXTRA large through-hole Ø 140 - 560 mm
■ Chuck size 400 - 1000 ■ Extended jaw stroke ■ 3 jaws
Application/customer benefits • End machining of long pipes with upset ends • Rapid and clamping stroke for short clamping cycles • Full spindle bore can be used Technical features • Air chuck for external clamping with built-in pneumatic cylinder • Rapid and clamping stroke • Air feed via distributor ring and SMW-profile seals at stopped spindle • Built-in non-return valves maintain the air pressure during machining • Clamping pressure level constantly checked by a safety control system (only for external clamping) • Clamping stroke control (no clamping in rapid stroke) is monitored Standard equipment
Ordering example BIG BORE BB-N-ES 400 / Z310
3-jaw chuck
2 elbow unions G 1/2“ (4 for BB-N-ES 1000) 12 mounting bolts (9 for the BB-N-ES 400)
Accessories
1 lifting eye bolt
Control unit AC-BB / AC-XN
1 set T-nuts with bolts
(see general catalog pages 378-381 )
1 set soft top jaws without distributor ring bracket
The principle invented by SMW: Air supply via distributor ring and SMW-profile seal rings
Pressure control prox. sensor (M8 x 1)
Picture 3 Safety pressure control: If the pressure is less than a pre-set safety level, the switch ring moves into the proximity switch field, sending an alarm signal. Jaw stroke control: If the part is clamped in a not correct jaw stroke position, the switch ring moves into the proximity switch field sending an alarm signal. Rapid and clamping stroke control prox. sensors (M8 x 1)
Picture 2 The SMW-profile seals lift to the expanded position, not touching the chuck body anymore. The clamping pressure is maintained by the twin non-return valve. The chuck can start to rotate.
Picture 1 Open / close movement (only possible at stopped spindle). The profile seals deform radially under the pneumatic pressure, sealing on the chuck body and filling the cylinder chamber. When the clamping pressure is reached, the air feed is stopped, closing the twin non- return valve.
Rapid stroke / jaw Clamping stroke / jaw
Clamping stroke Rapid stroke
End machining of pipe with front and rear chucks
Technical data
SMW-AUTOBLOK Type BB-N-ES Id. No. Through-hole
400-140 470-191 500-205 500-230 600-275 630-325 850-375 1000-560 052330 053536 052651 052652 052990 052653 052654 052655 140 (5.51“) 191 (7.52“) 205 (8.07“) 230 (9.06“) 275 (10.83“) 325 (12.80“) 375 (14.76“) 560 (22.05“) 20 (0.79“) 20 (0.79“) 25.4 (1“) 25.4 (1“) 25.4 (1“) 25.4 (1“) 25.4 (1“) 25.4 (1“) 13 (0.51“) 13 (0.51“) 16.9 (0.67“) 16.9 (0.67“) 16.9 (0.67“) 17.2 (0.67“) 13.4 (0.53“) 15 (0.59“) 7 (0.28“) 7 (0.28“) 8.5 (0.33“) 8.5 (0.33“) 8.5 (0.33“) 8.2 (0.32“) 12 (0.47“) 10.4 (0.41“) 2 / 10 (29 / 145) 705 565 1004 895 954 1192 1340 1090 130 (29225) 115 (25853) 190 (42714) 170 (38218) 185 (41590) 200 (44962) 200 (44962) 170 (38218) 1300 1300 1100 1300 1100 900 750 450 29 22 41 37 39 48 79 57 200 (441) 190 (419) 340 (750) 325 (717) 360 (794) 630 (1389) 970 (2138) 960 (2116) 6.5 9.83 16.4 16.1 19 36 105 160
mm (inch) mm (inch) mm (inch) mm (inch)
Total stroke per jaw Rapid stroke per jaw* Clamping stroke per jaw
Operating pressure min. / max.
bar (psi)
Piston area
cm 2
Gripping force at 6 bar
kN (lbf)
Max. speed
r.p.m.
Air consumption / jaw stroke at 6 bar
liter
Weight (without top jaws)
kg (lbs)
Moment of inertia
kg·m 2
* May not be used for clamping.
SMW-AUTOBLOK 371
SMW-AUTOBLOK 370
368 SMW-AUTOBLOK
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