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Rotary Indexers

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Zero Backlash

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Drive Station Style

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    • Gearhead & Motor Ready
    Gearhead Mounted
    Motor Mounted

    Housing Type

  • Show All
    • Sealed IP65
    Guarded
    Open

    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.

    Nexen's Rotary Indexer SystemsNexen's Rotary Indexer Systems

    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 GEARHEAD Mounted, SEALED Housing  SEALED Housing 

     

    CRD-PL Rotary Indexers

    CRD-PL

    CRD-MRS-PL Rotary Indexers

    CRD-MRS-PL

    CRD-HG Rotary Indexers

    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 GEARHEAD Mounted, GUARDED Housing GUARDED Housing

     

    PRD-PL Rotary Indexers

    PRD-PL

    PRD-HG Rotary Indexers

    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]    		 1540 to ??? Nm
    [13630 to ??? in-lb]
    Nominal Torque 544 to 1870 Nm
    [4815 to 16551 in-lb]    		 990 to ??? Nm
    [8762 to ??? 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 GEARHEAD Mounted, OPEN Housing OPEN Housing

     

    PRD-PL-No Guard Rotary Indexers

    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 GEARHEAD & MOTOR Ready, SEALED Housing  SEALED Housing 

     

    CRD-MRS-No Gearhead Rotary Indexers

    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 GEARHEAD & MOTOR Ready, GUARDED Housing  GUARDED Housing 

     

    CRD-MRg-No Gearhead Rotary Indexers

    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 GEARHEAD & MOTOR Ready, OPEN Housing  OPEN Housing 

     

    CRD-MRO-No Gearhead Rotary Indexers

    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 MOTOR Mounted, SEALED Housing SEALED Housing

     

    CRD-DD Rotary Indexers

    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

    • Cutting Systems

    • Gantry Systems

    • Medical Products

    • Robotics

    • Aerospace

    • Machine Tool

    • Semiconductor

    • Material Handling

    • Robotics Integration

    • Aerospace

    • Assembly/Custom Machines

    • Defense

    • 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

    350X

    CRDX550-PL

    550x

    PRDX750-PL

    750x

    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]