NTL-C
High precision power chuck Ø 260 - 400 mm ■ Centrifugal force compensation ■ Closed center - 3 jaws ■ Long stroke ■ proofline ® chucks = fully sealed - low maintenance Application/customer benefits • For large batch production / high speed machining and for fragile parts • Fully sealed, ideal for dry machining of castings and forgings or if high pressure coolant is used
LONG STROKE TONGUE & GROOVE
NTL-C: TONGUE & GROOVE master jaws (American Standard) Technical features • EXTRA long jaw stroke • Centrifugal force compensation via counterweights • Constant gripping force with permanent grease lubrication • Center 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 NTL-C 260 / A6
3-jaw chuck
s
Mounting bolts
a l e
m a i
Actual gripping force diagram
The data in the diagram 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.
200
180
160
140
400
120
Safety advice / danger of damage: When using taller / heavier jaws and / or clamping on a bigger diameter reduce draw pull / rotating speed accordingly.
100
315
260
80
60
F G
40
F
20
1000
2000
3000
4000 4500
0
Speed (r.p.m.)
Technical data
SMW-AUTOBLOK Type Number of jaws Radial jaw stroke
NTL-C 260
NTL-C 315
NTL-C 400
3 9
3
3
mm mm
11
12 30
Axial piston stroke Max. draw pull* Max. gripping force*
22.3
27.3
kN kN
68
80
100 180
125
145
Max. speed
r.p.m.
4400
3700
3000 114 2.15
Weight (without top jaws)
kg
44
69
Moment of inertia
kg·m 2
0.35
0.85
Recommended actuating cylinders
Type
SIN-S 125 / 150
SIN-S 125 / 150
SIN-S 150 / 175
Id. No. NTL-C (Center mounting)
77189126
77189131
77189140
* For internal clamping reduce the draw pull by 30%.
on request: Tooling Standard Parts Catalog
SMW-AUTOBLOK 466
SMW-AUTOBLOK 468
SMW-AUTOBLOK 325
76 SMW-AUTOBLOK
Made with FlippingBook Publishing Software