BB-D BB-M
High precision power chuck Ø 140 - 435 mm
■ EXTRA large through-hole ■ 3 jaws
INCH SERRATION
METRIC SERRATION
Application/customer benefits • For open center or partial open center clamping • For machines with very large spindle bore BB-D: Master jaws with INCH SERRATION (1/16”x 90°) BB-M: Master jaws with METRIC SERRATION (1.5 mm x 60°) (Suitable for Japanese chucks top jaws) Technical features • EXTRA large through-hole • Gripping force transmission via wedge hook • Case hardened body to assure greatest precision and long chuck life Standard equipment
Ordering example 3-jaw chuck BB-D 175 / A6
3-jaw chuck
1 set T-nuts with bolts 1 set soft top jaws
or
3-jaw chuck BB-M 250 / Z220
Mounting bolts
Actual gripping force diagrams
70
240
60
210
50
180
150
40
175
120
30
435
140
90
F G
20
315
250-255
F G
60
F
210
F
10
30
0
0 1000 2000 3000 4000 5000 6000 7000
1000
2000
3000
4000
5000
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
BB-D 140 BB-M 140
BB-D 175 BB-M 175
BB-D 210 BB-M 210
BB-D 250 BB-M 250
BB-D 255 BB-M 255
BB-D 315 BB-M 315
BB-D 435 BB-M 435
3
3
3
3
3
3
3
Number of jaws Through-hole Radial jaw stroke Axial piston stroke Max. draw pull* Max. gripping force*
39
56
66
78
82
122
167
mm mm mm
3.2
3.2
4
5
5
5
6,5
15 22 58
15 25 70
19 38
24 50
24 50
24 50
31 70
kN kN
108
145
145
145
210
7000
6000 11.5 0.05
5000 19.5 0.12
4000
4000
3200
2250
Max. speed
r.p.m.
6
30
33
44
122
kg
Weight (without top jaws)
0.016
0.27
0.32
0.62
3,5
Moment of inertia
kg·m 2
SIN-S 85 / 100 SIN-S 100 SIN-S 100 / 25 SIN-S 125 / 150 SIN-S 125 / 150 SIN-S 125 / 150 SIN-S 150 / 200 VNK-T2 70-37 VNK-T2 130-52 VNK-T2 150-67 VNK-T2 170-77 VNK-T2 176-82 VNK-T2 320-127 VNK-T2 450-165 77150714 77150917 77150921 77150725 77150726 77150731 77150743 77150814 77151117 77151121 77151025 77151026 77150831 77150843
Recommended actuating cylinders without hole Recommended actuating cylinders with hole
Id. No. BB-D 3 jaws (Center mounting) Id. No. BB-M 3 jaws (Center mounting)
* For internal clamping reduce the draw pull by 30%.
SMW-AUTOBLOK 470
SMW-AUTOBLOK 472
SMW-AUTOBLOK 335
112 SMW-AUTOBLOK
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