NTL-D NTL-C
High precision power chuck Ø 500 - 1000 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 • Safe clamping through centrifugal force compensation, even of deformation-sensitive parts at highest speeds • Fully sealed, ideal for dry machining of castings and forgings or if high pressure coolant is used NTL-D: Master jaws with INCH SERRATION (3/32“ x 90°) NTL-C: Master jaws with TONGUE & GROOVE 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 500 / Z380 1 set soft top jaws or Mounting bolts 3-jaw chuck NTL-C 800 / Z520
INCH SERRATION
TONGUE & GROOVE
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.
150 120 90 180 210 240
630 NTL 500 NTL
800 NTL
1000 NTL
S
Safety advice / danger of damage: When using taller / heavier jaws and / or clamping on a bigger diameter reduce draw pull / rotating speed accordingly.
F
30 60
0
500
1500
2500
1000
2000
0
Speed (r.p.m.)
Technical data
SMW-AUTOBLOK Type
NTL-D 500 NTL-C 500
NTL-D 630 NTL-C 630
NTL-D 800 NTL-C 800
NTL-D 1000 NTL-C 1000
Radial jaw stroke Axial piston stroke Max. draw pull* Max. gripping force*
mm mm
12.1
12.1
12.1
12.1
30
30
30
30
kN kN
120 240
120 240
120 240
120 240
Max. speed
r.p.m.
2400
2000 420 21.2
1500 680 55.7
1000
Weight (without top jaws)
kg
255
970 110
Moment of inertia
kg·m 2
8.2
Recommended actuating cylinders
Type
SIN-S 175 / 200
SIN-S 175 / 200
SIN-S 175 / 200
SIN-S 175 / 200
Id. No. NTL-D Id. No. NTL-C
77184651 77189151
77184664 77189164
77184680 77189180
77184690 77189190
* For internal clamping reduce the draw pull by 30%.
on request: Tooling Standard Parts Catalog
SMW-AUTOBLOK 470
SMW-AUTOBLOK 472
SMW-AUTOBLOK 335
78 SMW-AUTOBLOK
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