BIG BORE ® BB-SC INCH SERRATION
Front-end spring clamp power chuck EXTRA large through-hole Ø 275 - 565 mm
■ Chuck size 600 - 1020 ■ Clamping with spring packs ■ Rapid and clamping stroke
Application/customer benefits • End machining of long pipes / self centering clamping • Long jaw stroke to clear upset piping • Highest productivity / open and clamp time < 3 sec. • Low maintenance = high availability of the machine • Step mode for partial opening / clamping for shimming possible • Full spindle bore can be used Technical features • Self centering clamping with either 9 / 6 / 3 spring packs • Encapsulated spring packs • Opening via integrated cylinder • Permanently grease lubricated for constant grip force • Long jaw stroke with rapid and clamping stroke • Low air consumption • Stroke control • proofline ® chucks = fully sealed - low maintenance Standard equipment
s
a l e
Ordering example Big Bore SC 850-395
m a i
Chuck with mounting bolts 1 set of soft top jaws 1 set of T-nuts and bolts
Id. No. 053350
Accessories Air control AC-SC
The reliable principle: Clamping via encapsulated spring packs / opening via air cylinder
Picture 1 Chuck open (only at stopped spindle). The SMW profile seal collapses radial under the air pressure and seals against the chuck body. The cylinder chamber is filled. The piston is compressing the springs, the jaws open.
Picture 2 Chuck clamped.
Picture 3 Stroke control.
The SMW profile seal lifts off the chuck body due to elastic force. The springs expand and transmit their force onto the jaws via the wedge hook drive. The spindle can rotate.
The position of the jaws can be monitored via a mechanical cam by 1 or 2 proximity switches.
Rapid stroke / jaw Clamping stroke / jaw
Fast motion
Slow motion
End machining of tubes with front and rear chucks
Technical data
Extra long jaw stroke
SMW-AUTOBLOK Type Id. No. Through-hole Total stroke per jaw Rapid stroke per jaw* Clamping stroke per jaw Operating pressure at 9 springs
BB-SC 600-275
BB-SC 850-395
BB-SC 1020-565
053540
053350
053570
275 (10.83“)
395 (15.55“)
565 (22.24“)
mm (inch) mm (inch) mm (inch) mm (inch)
25.4 (1“)
27 (1.06“) 15 (0.59“) 12 (0.47“)
27 (1.06“) 15 (0.59“) 12 (0.47“)
16.9 (0.67“) 8.5 (0.33“)
5 (73) 5 (73) 50 (11240) 100 (22480) 150 (33721) 57 (12814) 113 (25403) 170 (38218) 57 (12814) 113 (25403) 170 (38218) 1000 700 420 60 115 139 510 (1124) 930 (2050) 1260 (2779) 34 101 223 5 (73)
bar (psi) kN (lbf)
Max. gripping force at 3 / 6 / 9 springs
Max. speed
r.p.m.
Air consumption to open at 5 bar (73 psi)
liter
Weight (without jaws) Moment of inertia
kg (lbs)
kg·m 2
* May not be used for clamping.
SMW-AUTOBLOK 373
SMW-AUTOBLOK 370
372 SMW-AUTOBLOK
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