Tool Clamping Solutions
Schunk Power Lathe Chuck without Through-hole (ROTA NCR-A) - ISO 702-4
QUANTITY
Sealed 6-jaw power lathe chuck with pendulum mechanism for low-deformation clamping and maintenance intervals three times as long.
Field of application
- on universal CNC lathes
- on vertical turret lathes
- on mill/turn machines
- on vertical lathes
Product features:
- 6-jaw compensation chucks
- Sealed version
- Pendular compensation: 2+2+2 jaws oscillating in pairs
- Spindle holder: ISO 702-4 Nr.5 (Z140), Nr. 8 (Z220), Nr.11 (Z300), Nr.15 (Z380) & Nr.20 (Z520)
- Jaw interface: 1/16" x 90° & 3/32" x 90° Nut 14H7
| Characterization | ID | O.D- Diameter | Spindle Type | Spindle Size | Serration | Max. RPM(1/min) | Max.clamping force(kN) | Max. actuating force [kN] | Stroke/jaw(mm) | Piston stroke (H) [mm] | Pendular compensation [mm] | Moment of inertia [kgm²] | Weight(kg) |
| ROTA-NCR-A 190 Z140-KV | 1339981 | 190 mm | ISO 702-4 | Nr.5 (Z140) | Tongue and groove | 4000 | 36 | 22 | 6 | 13.5 | ± 1 | 0.06 | 14 |
| ROTA-NCR-A 250 Z220-SV90° | 1331058 | 250 mm | ISO 702-4 | Nr.8 (Z220) | 1/16" x 90° | 3000 | 64 | 38 | 8 | 18.5 | ± 2 | 0.31 | 36 |
| ROTA-NCR-A-F 250 Z220-SV90° | 1339984 | 250 mm | ISO 702-4 | Nr.8 (Z220) | 1/16" x 90° | 3000 | 64 | 38 | 8 | 18.5 | ± 2 | 0.31 | 36 |
| ROTA-NCR-A 315 Z220-SV90° | 1339987 | 315 mm | ISO 702-4 | Nr.8 (Z220) | 1/16" x 90° | 2500 | 80 | 40 | 8 | 20 | ± 2 | 0.71 | 55 |
| ROTA-NCR-A-F 315 Z220-SV90° | 1339988 | 315 mm | ISO 702-4 | Nr.8 (Z220) | 1/16" x 90° | 2500 | 80 | 40 | 8 | 20 | ± 2 | 0.71 | 55 |
| ROTA-NCR-A 400 Z300-SV90° | 1339989 | 400 mm | ISO 702-4 | Nr.11 (Z300) | 1/16" x 90° | 1400 | 100 | 54 | 12 | 30 | ± 2.5 | 2.4 | 118 |
| ROTA-NCR-A-F 400 Z300-SV90° | 1339990 | 400 mm | ISO 702-4 | Nr.11 (Z300) | 1/16" x 90° | 1400 | 100 | 54 | 12 | 30 | ± 2.5 | 2.4 | 118 |
| ROTA-NCR-A 500 Z380-SV90° | 1339995 | 500 mm | ISO 702-4 | Nr.15 (Z380) | 1/16" x 90° | 1200 | 125 | 65 | 12 | 30 | ± 2.5 | 6 | 175 |
| ROTA-NCR-A-F 500 Z380-SV90° | 1339996 | 500 mm | ISO 702-4 | Nr.15 (Z380) | 1/16" x 90° | 1200 | 125 | 65 | 12 | 30 | ± 2.5 | 6 | 175 |
| ROTA-NCR-A 630 Z520-SV90° | 1339997 | 630 mm | ISO 702-4 | Nr.20 (Z520) | 1/16" x 90° | 1000 | 160 | 80 | 16 | 40 | ± 3.5 | 20 | 387 |
| ROTA-NCR-A-F 630 Z520-SV90° | 1339998 | 630 mm | ISO 702-4 | Nr.20 (Z520) | 1/16" x 90° | 1000 | 160 | 80 | 16 | 40 | ± 3.5 | 20 | 387 |
| ROTA-NCR-A 800 Z520-SV90° | 1340108 | 800 mm | ISO 702-4 | Nr.20 (Z520) | 1/16" x 90° | 700 | 160 | 80 | 16 | 40 | ± 3.5 | 34 | 495 |
| ROTA-NCR-A 1000 Z520-SV90° | 1340109 | 1000 mm | ISO 702-4 | Nr.20 (Z520) | 3/32" x 90° | 600 | 300 | 150 | 25 | 60 | ± 6 | 149 | 1300 |
- Sealed power lathe chuck - For significantly longer maintenance intervals
- Precision angle lever power chuck for top quality demands - Allows excellent machining processes
- High efficiency of the angle lever system - Process-reliable clamping due to high clamping forces
- Optimum jaw support for O.D. and I.D. clamping due to a very long base jaw guidance - Allows high clamping forces at a long service life
- Optimized lubrication system - Consistently high clamping forces are ensured
- Media feed-through (coolant or air) as standard option integrated in the chuck body - Flexibility depending on the application
- Low height - For maximum utilization of the machine room
- Deformation sensitive clamping of thin-walled workpieces - High degree of roundness of the workpieces
- Very accurate clamping of non-circular components - Perfect for castings
- Turning ring simplifies and optimizes top jaw boring/machining - Easy handling during boring/machining top jaws
- All functional parts are ground and hardened - Ensures a long service life
The SCHUNK ROTA NCR-A consists of a central chuck piston carrying three inner pendulums aligned at 120°. Each pendulum is connected to two base jaws. This ensures workpiece centering between six contact points, which can be adjusted in pairs. As the clamping forces are directed towards the chuck center, optimum centering is achieved without redundant dimensioning of the workpiece.
The special seals located on the serrated jaw interface and pistons of the SCHUNK ROTA NCR-A prevent grease from being flushed out and prevent the clamping force from being gradually lost. In addition, the seal prevents chips or dirt from ingress into the chuck body. This increases process reliability and lengthens maintenance intervals, translating into less frequent lubrication, and cleaning of the lathe chuck.
