BH-M
High precision power chuck Ø 130 - 450 mm
■ Large through-hole ■ 2, 3 and 4 jaws
METRIC SERRATION
Application/customer benefits • For open center or partial open center clamping • Large through-hole BH-M: Master jaws with METRIC SERRATION (1.5 mm x 60°) (Suitable for Japanese chucks top jaws) Technical features • Gripping force transmission via wedge hook • Case hardened body to assure greatest precision and long chuck life
• 2 jaw version from diameter 130 to 315 • 3 jaw version available in all diameters • 4 jaw chuck available starting from diameter 165 mm Standard equipment
Ordering example 2-jaw chuck BH-M 210 / A6
2-, 3- or 4-jaw chuck 1 set T-nuts with bolts 1 set soft top jaws Mounting bolts
or
3-jaw chuck BH-M 250 / A8
Actual gripping force diagrams
120 100 140 160 180 210 200
110
100
90
70 80
60
450
210
400
50 40
315-320
80 60 40 20
250
F G
165
F G
30
130
F
20
F
10
0
1000
2000
3000
4000
0
1000 2000 3000 4000 5000 6000
7000
Speed (r.p.m.)
Speed (r.p.m.)
Safety advice / danger of damage: When using taller / heavier jaws and / or clamping on a bigger diameter reduce draw pull / rotating speed accordingly.
The data in the diagrams refer to 3-jaw chucks, newly maintained according to their service manuals using SMW-AUTOBLOK K67 grease. The static and dynamic gripping forces have been measured using standard soft top jaws, placed in a position not exceeding the outer diameter of the chuck.
Technical data SMW-AUTOBLOK Type Number of jaws Through-hole
BH-M 130 BH-M 165 BH-M 210 BH-M 250 BH-M 315 BH-M 320 BH-M 400 BH-M 450 2 3 234234234234 3 3 4 3 4 32 46 52 66 95 103 118 118 3.2 3.2 4 5 5 5 6.5 6.5 15 15 19 24 24 24 31 31 15 22 17 25 25 25 38 38 34 50 50 40 60 60 60 70 70 70 70 42 60 48 70 70 72 110 110 98 145 145 115 175 175 175 210 210 210 210 7000 7000 6000 6000 5000 5000 5000 4300 4000 4000 3400 3200 3200 2700 3200 2500 2000 2000 1700 5 9.5 19 30 46 52 86 135 0.012 0.036 0.12 0.27 0.62 0.72 2 3.5
mm mm mm
Radial jaw stroke Axial piston stroke Max. draw pull* Max. gripping force*
kN kN
Max. speed
r.p.m.
Weight (without top jaws)
kg
Moment of inertia
kg·m 2
Recommended actuating cylinders
SIN-S 85 / 100 SIN-S 100 SIN-S 100 / 125 SIN-S 125 / 150 SIN-S 125 / 150 SIN-S 125 / 150 VNK-T2 70-37 VNK-T2 102-46 VNK-T2 130-52 VNK-T2 150-67 VNK-T2 225-95 VNK-T2 250-110
SIN-S 150 / 175
VNK-T2 320-127
Id. No. BH-M 2 jaws (Center mounting) Id. No. BH-M 3 jaws (Center mounting) Id. No. BH-M 4 jaws (Center mounting)
77152613 77158516 77158521 77153725 77152631 - 77152813 77158616 77158621 77153825 77152831 77152832 77153840 77153845 - 77158716 77158721 77153925 77153031 - 77153940 77153945 - -
* For internal clamping reduce the draw pull by 30%.
SMW-AUTOBLOK 476
SMW-AUTOBLOK 478
SMW-AUTOBLOK 335
102 SMW-AUTOBLOK
Made with FlippingBook Publishing Software