BHD-FC BHM-FC
High precision power chuck Ø 165 - 630 mm ■ Centrifugal force compensation ■ Large through-hole ■ 3 jaws Application/customer benefits • For open center or partial open center clamping • Large through-hole • Compensation of centrifugal force for high speed • Clamping of easily deformed parts with low gripping force, maintained to high speed BHD-FC: Master jaws with INCH SERRATION (1/16” x 90°, 3/32’’ x 90°) BHM-FC: Master jaws with METRIC SERRATION (1.5 mm x 60°) (Ø 165 to 400 mm) (suitable for japanese jaws) Technical features • Gripping force transmission via wedge hook • Centrifugal force compensation by means of counter balance weights for minimum loss of gripping force at high speed • Case hardened body (up to Ø 315) to assure greatest precision and long chuck life Standard equipment Ordering example 3-jaw chuck 3-jaw chuck BHD-FC 210 / A6 1 set T-nuts with bolts or 1 set soft top jaws 3-jaw chuck BHM-FC 250 / Z220 Mounting bolts
INCH SERRATION
METRIC SERRATION
Actual gripping force diagrams
120 100 140 160 180 220 200 240
630
160
140
315
500
120
250
100
210
400
80
F G
60
80 60 40 20
F G
165
F
40
F
20
0
1000
2000
3200
0 1000 2000 3000 4000 5000 6000 7000
Speed (r.p.m.)
Speed (r.p.m.)
The data in the diagrams refer to 3-jaw chucks, newly maintained according to their service manuals using SMW-AUTOBLOK K67 grea- se. 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.
Safety advice / danger of damage: When using taller / heavier jaws and / or clamping on a bigger diameter reduce draw pull / rotating speed accordingly.
Technical data SMW-AUTOBLOK Type
BHD-FC 165 BHM-FC 165
BHD-FC 210 BHM-FC 210
BHD-FC 250 BHM-FC 250
BHD-FC 315 BHM-FC 315
BHD-FC 400 BHM-FC 400
BHD-FC 500 -
BHD-FC 630 -
Number of jaws Through-hole Radial jaw stroke Axial piston stroke Max. draw pull* Max. gripping force*
3
3
3
3
3
3
3
mm mm mm
45
52
66
95
118
125
165
3.2
4
5
5
6.5
9
9
15 25 70
19 38
24 50
24 60
31 70
34
34
kN kN
100 240
100 240
110
145
170
200
Max. speed
r.p.m.
6500
6000
4500
4000
3200
2500
2000
kg
11
21
32
50
95
160
335
Weight (without top jaws)
Moment of inertia
kg·m 2
0.042
0.13
0.29
0.67
2
5.2
18
Recommended actuating cylinders
SIN-S
100
100 / 125 125 / 150 125 / 150 150 / 175 150 / 175 / 200 175 / 200
VNK-T2 / VSG 102-46
130-52
150-67
225-95
320-127
320-127
450 / 165
Id.No. BHD-FC 3 jaws (Center mounting) Id.No. BHM-FC 3 jaws (Center mounting)
77154316 77154321 77154325 77154331 77154340 77154350 77154363 77154616 77154621 77154625 77154431 77154640 - -
* For internal clamping reduce the draw pull by 30%.
SMW-AUTOBLOK 466
SMW-AUTOBLOK 468
SMW-AUTOBLOK 325
106 SMW-AUTOBLOK
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