The improper use of machine tools and their accessories can result in serious injury. Before using this tool, thoroughly read the instructions and make sure you understand its proper and safe use.
CNC Rotary Table Indexer
Sherline has advanced its precision 4″ rotary table into the 21st century with the addition of Computer Numerical Control (CNC). This upgrade makes it an ideal solution for clockmakers, gear cutters, and anyone needing to machine intricate radially symmetrical patterns. The CNC rotary table takes the complexity out of repetitive indexing tasks.
Complete, Stand-Alone System
Programming is done entirely through the integrated numeric keypad—no computer required. The system includes everything needed for operation:
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4″ Sherline rotary table with pre-installed stepper motor
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Microprocessor unit with numeric keypad
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115 VAC power supply (universal 110–240 VAC compatible)
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All required connecting cables
Mounting Options
The rotary table includes clamps and T-nuts for mounting to the T-slots of a Sherline mill table. Additional options allow for flexible positioning:
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Right-Angle Attachment: Holds the table vertically at a 2.7″ center height. A matching right-angle tailstock is also available for supporting long workpieces.
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Tilting Angle Table: Allows mounting at any angle from 0° to 90°. At 90°, the center height remains 2.7″, compatible with the right-angle tailstock.
Simple, Accurate Operation
Simply enter the steps per revolution (or degrees per step) via the keypad. The table advances precisely to the next position at the press of a button. If needed, previous positions can be recalled instantly.
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Resolution: 28,800 steps per revolution
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Accuracy: ±0.006° per step
This precision allows for accurate machining of gears with odd numbers of teeth, and built-in calculations prevent cumulative errors.
Flexible Integration
This CNC rotary indexer is a complete, stand-alone unit—perfect for complex indexing operations. It can also integrate with other CNC systems:
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Accepts input signals from an external CNC controller
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Sends “completion” signals back to the master controller
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Can be daisy-chained with other units for coordinated actions
For more advanced applications, the rotary table can be linked with Sherline’s linear controller (P/N 8800), enabling seamless combinations of rotary and linear motion—ideal for gear cutting and other multi-axis operations, all without requiring advanced CNC programming knowledge.
Weight Capacity (Continuous Use)
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Horizontal orientation: 50 lbs
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Vertical orientation: 30 lbs
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Vertical rotational torque: 6 ft-lbs (e.g., able to lift a 6 lb. weight 12″ from the center)
Note: The table can handle heavier loads if not under continuous use. Refer to the Video tab for practical examples.
Power Supply
The controller power supply operates on 110–240 VAC and automatically adjusts for global use. (Earlier models included a 110 VAC-only power supply.)
Compatibility with Tilting Angle Table (TAT) Limit Switches
For instructions on using the rotary table with limit switches on the TAT, see the “Instructions” tab and download the PDF titled MASSO Rotary Table Limit Switch Interference on the Tilting Angle Table.
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CNC Rotary Table in Action
Sherline Rotary Laser Scanning Table
Rotary Table Weight Capacity Specifications |
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Horizontal orientation | 50 lbs. |
Vertical orientation | 30 lbs. |
Vertical rotational torque | 6 foot/lbs. (meaning it can lift a 6 lb. weight when suspended 12″ away from the center of the rotary table) |
Mechanical backlash | 0.2° or less |
Rotary Indexer Specifications |
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Table Size | 4″ diameter by 2″ height |
Part mounting Provisions | Center thread including chuck adapter and 4 T-slots |
Rotation Speed | 1°/ sec to 50°/sec maximum (programmable in 1° increments) |
Resolution | 28,800 steps per revolution (±.006° per step) |
Backlash Compensation | Programmable |
Stepper Motor | 120 oz-in, 2 Amp, NEMA 23 Frame size, 400 steps per revolution |
Power Supply Transformer | Input: 120 VAC 60 Hz 38 W; Output: 24V, 1000 mA |

*NOTE: If you need a metric equivalent for the 10-32 thread, you can use a 5 x .8mm thread. If the fit is too tight, you can retap the 10-32 holes with a 5 x .8mm tap, and the new threads should be fine.
Part No. | Description | Quantity |
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10930 | 3/8″ Bearing | 2 |
30561 | 10-32 T-nut | 2 |
3058 | 4-Jaw Hold Down Set Assembly | 1 |
37090 | Rotary Table Chuck Adapter, 3/8-16 to 3/4-16 | 1 |
37100 | Rotary Table Base | 1 |
37110 | Rotary Table Top | 1 |
37121 | CNC Rotary Table Worm Housing (Not sold separately) | N/A |
37131 | CNC Rotary Table Worm Shaft (Not sold separately) | N/A |
37122 | CNC Rotary Table Worm Housing Assembly (P/Ns 37121, 37131) | 1 |
37123 | CNC Rotary Table Coupling | 1 |
37124 | CNC Rotary Table Coupling Adapter | 1 |
37150 | Oil Plug | 1 |
37160 | Preload Nut | 1 |
37170 | Lock Pin | 1 |
37200 | Button Head Screw, 10-32 X 3/8″ | 2 |
37210 | Hold Down Tab | 1 |
37220 | Button Head Screw, 6-32 X 1/4″ | 1 |
40050 | Handwheel Assembly | 1 |
40330 | 10-32 X 5/8″ SHCS | 2 |
40420 | Headstock Bearing | 1 |
40510 | SHC Screw, 10-32 X 3/8″ | 1 |
40520 | Cup Point Set Screw, 10-32 X 3/16″ | 4 |
40540 | Cone Point Set Screw, 5/16-18 X 3/4″ | 1 |
40660 | Washer | 1 |
40670 | 10-32 X 1/2″ SHCS | 2 |
50120 | Pointer | 1 |
12050 | SHC Screw, 8-32 X 3/8″ | 4 |
87510 | CNC Rotary Table Stepper Motor Mount | 1 |
67127 | Stepper Motor w/Flat & Plug Assembly, 2 Amp, 100-oz., NEMA #23 frame-size | 1 |
67126 | High-Torque Stepper Motor (Optional upgrade), 2 Amp, 191-oz., NEMA #23 frame-size | 1 |
87041 | 120 VAC power supply (24 VDC, 1 amp output) | 1 |
87100 | Control unit with keypad/electronics | 1 |
87250 | Motor-to-keypad 6′ extension cable | 1 |
87350 | Remote (limit) switch/daisy-chain 1/2 cable | 1 |
Click the P/N below to download a zipped version of the IGS 3D CAD file. You will need to extract the zip file before viewing the IGS file.
8730 3D IGS model
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