NTL-D NTL-M
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 mid to large batch production • Fully sealed, ideal for dry machining of castings and forgings or if high pressure coolant is used • Safe clamping due to centrifugal force compensation, for high speed machining and for fragile parts NTL-D: Master jaws with INCH SERRATION (1/16” x 90°, 3/32“ x 90°) NTL-M: Master jaws with METRIC SERRATION (1.5 mm x 60°) (suitable for japanese chuck top jaws) 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 3-jaw chuck NTL-D 260 / A6 1 set T-nuts and bolts or 1 set soft top jaws 3-jaw chuck NTL-M 260 / Z220
INCH SERRATION
METRIC SERRATION
s
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
100
Safety advice / danger of damage: When using taller / heavier jaws and / or clamping on a bigger diameter reduce draw pull / rotating speed accordingly.
315
260
80
60
F G
40
F
20
1000
2000
3000
4000 4500 Speed (r.p.m.)
0
Technical data
SMW-AUTOBLOK Type
NTL-D 260 NTL-M 260
NTL-D 315 NTL-M 315
NTL-D 400 NTL-M 400
Number of jaws Radial jaw stroke Axial piston stroke Max. draw pull* Max. gripping force*
3 9
3
3
mm mm
11
12 30
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-D (Center mounting) Id. No NTL-M (Center mounting)
77184626 77184726
77184631 77184731
77184640 77184740
* For internal clamping reduce the draw pull by 30%.
on request: Tooling Standard Parts Catalog
SMW-AUTOBLOK 466
SMW-AUTOBLOK 468
SMW-AUTOBLOK 325
74 SMW-AUTOBLOK
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