NT-RC NT-RD
Quick jaw change high precision power chuck Ø 170 - 400 mm ■ Centrifugal force compensation ■ 3 jaws, closed center ■ proofline ® chucks = fully sealed – low maintenance Application/customer benefits • For mid to large batches flexible production / high speed machining and for fragile parts • Quick jaw change = short set up time • Fully sealed, ideal for dry machining of castings and forgings or if high pressure coolant is used • Ideal for vertical, pick up and horizontal machines NT-RC: Quick jaw change with TONGUE & GROOVE master jaws NT-RD: Quick jaw change with serrated master jaws (2.5 mm x 60°) (radially adjustable) Technical features • High accuracy patented quick jaw change • Centrifugal force compensation • Constant gripping force with permanent grease lubrication • Central bore for coolant and / or air • Chuck body and internal parts case hardened • proofline® chucks = fully sealed – low maintenance Standard equipment Ordering example 3-jaw chuck 1 set soft top jaws 1 quick jaw change wrench Mounting bolts 3-jaw chuck NT-RC 215 / A6 or 3-jaw chuck NT-RD 260 / Z220
Quick jaw change SERRATION
Quick jaw change TONGUE & GROOVE
s
a l e
m a i
Actual gripping force diagrams
115
210
215
100
120 100 140 160 180
400
80
170
315
60
260
80 60 40 20
40
F G
F G
F
F
20
0 1000
2000 3000 4000 5000 6000
0
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
NT-RD 170 NT-RC 170
NT-RD 215 NT-RC 215
NT-RD 260 NT-RC 260
NT-RD 315 NT-RC 315
NT-RD 400 NT-RC 400
Number of jaws Radial jaw stroke Axial piston stroke Max. draw-pull* Max. gripping force*
3
3
3 5
3
3 7
mm mm
3.6
4.6
6.3
17 30 72
22 42
24 55
30 65
33 75
kN kN
112
150
180
210
Max. speed
r.p.m.
6500
6000
4800
4000
3200 112 2.15
Weight (without top jaws)
kg
13
25
40
68
Moment of inertia
kg·m 2
0.048
0.146
0.34
0.84
Recommended actuating cylinders
SIN-S 100
SIN-S 100 / 125 SIN-S 125 / 150 SIN-S 125 / 150 SIN-S 150 / 175
Id.-No. NT-RC (Center mounting) Id.-No. NT-RD (Center mounting)
77188317 77183317
77188321 77183321
77188326 77183326
77188331 77183331
77188340 77183340
* For internal clamping reduce the draw pull by 30%.
SMW-AUTOBLOK 466
SMW-AUTOBLOK 174
SMW-AUTOBLOK 325
172 SMW-AUTOBLOK
Made with FlippingBook Publishing Software