Rotary Indexers
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About our Rotary Indexer Systems
Based on Nexen's innovative Roller Pinion technology, the patented Rotary Indexer Systems come complete with a precision-grade bearing and drive mechanism.
Packaged in a rigid housing, Nexen's Rotary Indexer System delivers exceptional accuracy, fast acceleration, high speed and load capacity, and can be engineered to meet the application requirements.
Nexen's Rotary Indexer Systems can start and stop at any incremental position. Also, users can change the motion profile by simply loading a new servo drive program. Unlike traditional cam-driven systems, Nexen's Rotary Indexers can handle peak torque inputs at any time, allowing for up to 2x faster indexing times.
The Nexen Rotary Indexer Advantage
High Indexing Precision
With an indexing precision of up to ± 11 ArcSec and repeatability of up to ± 1.2 ArcSec, Nexen's Indexers offer unmatched mechanical system capabilities.
Zero Backlash
Unlike other mechanical drive systems, Nexen's Indexers offer zero backlash options from the motor through the driven load.
High Load Capacity
Nexen's Rotary Indexers can handle loads up to 1575 kN (on PRD) by utilizing precision grade, high load capacity cross-roller bearing,
High Output Torque
Rotary Indexers have a maximum acceleration torque of up to 4,811 Nm and a Nominal torque of up to 2,625 Nm.
High Speed
Indexers are designed for speeds up to 304 RPM.
Large Open Center
The Indexer's design allows for a large open center for more application possibilities.
Smooth in Motion
Combining Nexen's RPS technology with a preloaded cross-roller bearing and an integrated motor/precision gearhead gives a rigid, smooth system.
Differences between PRD and CRD Systems
Precision Rotary Indexer Systems (PRD)
The PRD system is built on a precision machined steel plate with a guard that shrouds the gear and pinion. Numerous options are available, including a low-backlash Planetary Gearhead or zero backlash Nexen Harmonic Gearhead to drive pinion. Available output bolt circle diameters of 400, 750, 1100, or 1500 mm.
Compact Rotary Indexer Systems (CRD)
The CRD system is built on a rigid, sealed cast iron housing that completely encloses the gear and pinion. Numerous options are available, including motor/gearbox-ready input, a pre-installed low-backlash Planetary Gearhead, or a pre-installed zero-backlash Nexen Harmonic Gearhead to drive the pinion. Output bolt circle diameters of 150, 250, 350, or 550 mm are available.
Resources
Rotary Indexers Technical Data
Rotary Indexers Video(s)
Nexen's Rotary Indexer system
Design World: What is a Rotary Indexing Table?
Ring Drive Products
Compare our Rotary Indexers
GEARHEAD Mounted, 
SEALED Housing
|
CRD-PL |
CRD-MRS-PL |
CRD-HG |
|
| Gearhead | Low Backlash Planetary | Planetary | Zero Backlash Harmonic |
| Gearhead Ratio | 4:1 to 300:1 (right angle also available) | 3:1 to 300:1 (right angle also available) | 50:1 to 120:1 (extremely compact) |
| Housing | IP65 Sealed Rigid Cast Iron | IP65 Sealed Rigid Cast Iron | IP65 Sealed Rigid Cast Iron |
| Indexer Ring Gear | Nexen Zero Backlash RPS Gear and Roller Pinion | Nexen Zero Backlash RPS Gear and Roller Pinion | Nexen Zero Backlash RPS Gear and Roller Pinion |
| Indexer Ring Gear Ratio | 3.8:1 to 8.2:1 | 9:1 to 17.1:1 | 3.8:1 to 8.2:1 |
| Input to Output Ratio | 15.2:1 to 32.8:1 | 27.3:1 to 5130:1 | 190:1 to 984:1 |
| Maximum Acceleration Torque | 494 to 1066 Nm [4372 to 9435 in-lb] |
119 to 544 Nm [1053 to 9435 in-lb] |
532 to 1148 Nm [4709 to 10161 in-lb] |
| Nominal Torque | 323 to 697 Nm [2859 to 6169 in-lb] |
119 to 299 Nm [1053 to 2646 in-lb] |
380 to 820 Nm [3363 to 7258 in-lb] |
| Maximum Backlash | 9.4 to 20.3 ArcSec | 17.4 to 39.4 ArcSec | 0 ArcSec |
| One-Way Positional Accuracy | 27 to 59 ±ArcSec | 31 to 59 ±ArcSec | 20 to 43 ±ArcSec |
| One-Way Repeatability | 3.3 to 7.1 ±ArcSec | 5.1 to 9.8 ±ArcSec | 3.3 to 7.1 ±ArcSec |
| Maximum Velocity | 120 to 225 RPM | 23.5 to 304 RPM | 11 to 25 RPM |
| Max Continuous Velocity | 70 to 151 RPM | 23.5 to 222 RPM | 8 to 18 RPM |
| Output Inertia | 0.227 to 4.600 kgm² [5.387 to 109.160 lbf²] |
0.048 to 0.669 kgm² [1.139 to 15.876 lbf²] |
0.227 to 4.600 kgm² [5.387 to 109.160 lbf²] |
GEARHEAD Mounted, 
GUARDED Housing
|
PRD-PL |
PRD-HG |
|
| Gearhead | Low Backlash Size 4 Planetary | Zero Backlash Harmonic |
| Gearhead Ratio | 4:1 to 300:1 (right angle also available) | 50:1 to 120:1 (extremely compact) |
| Housing | Guarded | Guarded |
| Indexer Ring Gear | Nexen Zero Backlash RPS Gear and Roller Pinion | Nexen Zero Backlash RPS Gear and Roller Pinion |
| Indexer Ring Gear Ratio | 6.4:1 to 22:1 | 6.4:1 to 22:1 |
| Input to Output Ratio | 25.6:1 to 6630:1 | 320:1 to 2652:1 |
| Maximum Acceleration Torque | 832 to 2860 Nm [7364 to 25313 in-lb] |
461 to 1584 Nm [4080 to 14020 in-lb] |
| Nominal Torque | 544 to 1870 Nm [4815 to 16551 in-lb] |
326 to 1122 Nm [2885 to 9930 in-lb] |
| Maximum Backlash | 3 to 12 ArcSec | 0 ArcSec |
| One-Way Positional Accuracy | 11 to 35 ±ArcSec | 13.0 to 20.1 ±ArcSec |
| One-Way Repeatability | 1.2 to 4.2 ±ArcSec | 1.6 to 2.4 ±ArcSec |
| Maximum Velocity | 27 to 94 RPM | 2.7 to 4.2 RPM |
| Output Inertia | 1.39 to 112.95 kgm² [32.99 to 2680.34 lbf²] |
1.39 to 112.95 kgm² [32.99 to 2680.34 lbf²] |
GEARHEAD Mounted, 
OPEN Housing
|
PRD-PL-No Guard |
|
| Gearhead | Low Backlash Size 4 Planetary |
| Gearhead Ratio | 4:1 (others available) |
| Housing | Open |
| Indexer Ring Gear | Nexen Zero Backlash RPS Gear and Roller Pinion. |
| Indexer Ring Gear Ratio | 6.4:1 to 22:1 |
| Input to Output Ratio | 25.6:1 to 88:1 |
| Maximum Acceleration Torque | 832 to 2860 Nm [7364 to 25313 in-lb] |
| Nominal Torque | 544 to 1870 Nm [4815 to 16551 in-lb] |
| Maximum Backlash | 3 to 12 ArcSec |
| One-Way Positional Accuracy | 11 to 35 ±ArcSec |
| One-Way Repeatability | 1.2 to 4.2 ±ArcSec |
| Maximum Velocity | 27 to 94 RPM |
| Output Inertia | 1.39 to 112.95 kgm² [32.99 to 2680.34 lbf²] |
GEARHEAD & MOTOR Ready, SEALED Housing
|
CRD-MRS-No Gearhead |
|
| Gearhead | None, Ready to Accept Gearhead/Motor |
| Gearhead Ratio | N/A |
| Housing | IP65 Sealed Rigid Cast Iron |
| Indexer Ring Gear | Nexen Zero Backlash RPS Gear and Roller Pinion. |
| Indexer Ring Gear Ratio | 9:1 to 17.1:1 |
| Input to Output Ratio | 9:1 to 17.1:1 |
| Maximum Acceleration Torque | 288 to 544 Nm [2549 to 4815 in-lb] |
| Continuous Stall Torque | 158 to 299 Nm [1398 to 2646 in-lb] |
| Maximum Backlash | 0 ArcSec |
| One-Way Positional Accuracy | 31 to 59 ±ArcSec |
| One-Way Repeatability | 5.2 to 9.8 ±ArcSec |
| Maximum Velocity | 161 to 304 RPM |
| Max Continuous Velocity | 117 to 222 RPM |
| Output Inertia | 0.048 to 0.669 kgm² [1.139 to 15.876 lbf²] |
GEARHEAD & MOTOR Ready, GUARDED Housing
|
CRD-MRG-No Gearhead |
|
| Gearhead | None, Ready to Accept Gearhead/Motor |
| Gearhead Ratio | N/A |
| Housing | Guarded Rigid Cast Iron |
| Indexer Ring Gear | Nexen Zero Backlash RPS Gear and Roller Pinion. |
| Indexer Ring Gear Ratio | 9:1 to 17.1:1 |
| Input to Output Ratio | 9:1 to 17.1:1 |
| Maximum Acceleration Torque | 288 to 544 Nm [2549 to 4815 in-lb] |
| Continuous Stall Torque | 158 to 299 Nm [1398 to 2646 in-lb] |
| Maximum Backlash | 0 ArcSec |
| One-Way Positional Accuracy | 31 to 59 ±ArcSec |
| One-Way Repeatability | 5.2 to 9.8 ±ArcSec |
| Maximum Velocity | 161 to 304 RPM |
| Max Continuous Velocity | 117 to 222 RPM |
| Output Inertia | 0.048 to 0.669 kgm² [1.139 to 15.876 lbf²] |
GEARHEAD & MOTOR Ready, OPEN Housing
|
CRD-MRO-No Gearhead |
|
| Gearhead | None, Ready to Accept Gearhead/Motor |
| Gearhead Ratio | N/A |
| Housing | Open |
| Indexer Ring Gear | Nexen Zero Backlash RPS Gear and Roller Pinion. |
| Indexer Ring Gear Ratio | 9:1 to 17.1:1 |
| Input to Output Ratio | 9:1 to 17.1:1 |
| Maximum Acceleration Torque | 119 to 224 Nm [1053 to 1983 in-lb] |
| Continuous Stall Torque | 119 to 224 Nm [1053 to 1983 in-lb] |
| Maximum Backlash | 0 ArcSec |
| One-Way Positional Accuracy | 31 to 59 ±ArcSec |
| One-Way Repeatability | 5.2 to 9.8 ±ArcSec |
| Maximum Velocity | 161 to 304 RPM |
| Max Continuous Velocity | 117 to 222 RPM |
| Output Inertia | 0.048 to 0.669 kgm² [1.139 to 15.876 lbf²] |
MOTOR Mounted, SEALED Housing
|
CRD-DD |
|
| Gearhead | None, Includes Nexen Supplied Servomotor |
| Gearhead Ratio | N/A |
| Housing | P65 Sealed Rigid Cast Iron |
| Indexer Ring Gear | Nexen Zero Backlash RPS Gear and Roller Pinion. |
| Indexer Ring Gear Ratio | 6.2:1 to 13.1:1 |
| Input to Output Ratio | 6.2:1 to 13.1:1 |
| Maximum Acceleration Torque | 367 to 770 Nm [3248 to 6815 in-lb] |
| Continuous Stall Torque | 100 to 210 Nm [885 to 1859 in-lb] |
| Maximum Backlash | 0 ArcSec |
| One-Way Positional Accuracy | 20 to 41 ±ArcSec |
| One-Way Repeatability | 3.2 to 6.9 ±ArcSec |
| Maximum Velocity | See Charts |
| Output Inertia | 0.219 to 4.480 kgm² (Includes Motor Inertia) [5.197 to 106.312 lbf²] |
Required Components and Accessories for our Rotary Indexers
Listed below are some of the Required Components and Accessories for Rotary Indexers. Use the filters above to find the complete list of Required Components and Accessories on the product page.
Accessories
- Grease
- Indexer Dial Plate
Applications
Industries and Applications
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Cutting Systems
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Gantry Systems
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Medical Products
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Robotics
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Aerospace
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Machine Tool
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Semiconductor
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Material Handling
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Robotics Integration
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Aerospace
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Assembly/Custom Machines
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Defense
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Theme Parks and Theatrical Events
More Information
Not finding what you are looking for?
Note: The technical data on this website is subject to change without notice. Please contact Nexen for help with your application, appropriate sizing, and configuration.
Nexen's X-Line of Rotary Indexers
Based on Nexen’s established Precision Ring Drive Systems, the new X-Line delivers up to 3 times more torque and 2.6 times moment load capacity in a compact package.
Nexen offers the X-Line in a comprehensive range of models to fit several applications. Contact Nexen for help with sizing your application.
CRDX350-PL
| Performance Specs | |
| One Way Positional Accuracy | ± 47.7 ArcSec |
| One Way Repeatability | ± 5.1 ArcSec |
| Angular Backlash | <20.4 ArcSec |
| Gear To Pinion Ratio | 3.5:1 |
| Gearhead Ratio | 4:1 |
| Total Ratio | 14:1 |
| Max Output Speed | 161 RPM |
| Max Acceleration Torque | 2245 Nm [19870 inlb] |
| Nominal Torque | 1283 Nm [11355 inlb] |
CRDX550-PL
| Performance Specs | |
| One Way Positional Accuracy | ± 30.4 ArcSec |
| One Way Repeatability | ± 3.2 ArcSec |
| Angular Backlash | <13.0 ArcSec |
| Gear To Pinion Ratio | 5.5:1 |
| Gearhead Ratio | 4:1 |
| Total Ratio | 22:1 |
| Max Output Speed | 120 RPM |
| Max Acceleration Torque | 3528 Nm [31225 inlb] |
| Nominal Torque | 2016 Nm[17843 inlb] |
PRDX750-PL
| Performance Specs | |
| One Way Positional Accuracy | ± 21.8 ArcSec |
| One Way Repeatability | ± 2.3 ArcSec |
| Angular Backlash | <9.5 ArcSec |
| Gear To Pinion Ratio | 7.5:1 |
| Gearhead Ratio | 4:1 |
| Total Ratio | 30:1 |
| Max Output Speed | 54 RPM |
| Max Acceleration Torque | 4811 Nm [42581 inlb] |
| Nominal Torque | 2750 Nm [24339 inlb] |