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CNC Rotary Table Indexer
CNC Rotary Table Indexer

Product #: 8700
Price: $761.25

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Sherline has taken their accurate and reliable 4" rotary table into the 21st century with the addition of Computer Numeric Control (CNC). Clockmakers, or anyone with a need to cut gears or other complicated radially symmetrical patterns, will find this accessory takes all the headaches out of repetitive indexing operations.

All entries are made from a simple keypad. No separate computer is needed. You get everything you need including the 4" Sherline rotary table with installed stepper motor, microprocessor unit with numeric input keypad, 115 VAC power source and all necessary connecting cables. Operation is very simple. After entering the number of steps per revolution (or the number of degrees per step) on the numeric keypad, the table advances quickly and precisely to the next position at the touch of a single advance key. If an error is made, previous positions can be accurately recalled by hitting another button. Basic resolution is 28,800 steps per revolution, ±0.006° per step. This allows the accurate machining of items like gears with odd numbers of teeth. Computations are made internally to a high degree of accuracy to avoid cumulative errors.

The CNC rotary indexer is a stand-alone unit. You get everything you need to make complex indexing jobs easy. In addition, the unit can be connected to an existing CNC control to act in conjunction with that system. An input signal triggers the programmed function. When it is complete, it signals back to continue the program. The unit can also be "daisy chained" with other units to trigger sequential actions. As with all Sherline accessories, complete instructions are included.

The rotary table can also be "daisy chained" with Sherline's linear controller (P/N 8800) to achieve combinations of rotary and linear movement in sequence. This makes it easy to set up for relatively sophisticated operations like cutting gears without having to know anything about CNC programming beyond what is entered from these simple keypads.

Rotary Indexer Specifications
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)
Resolution—28,800 steps per revolution (±.006° per step)
Backlash Compensation—Programmable
Stepper Motor—100 oz-in, 2 Amp, #23 Frame size, 400 steps per revolution
Power Supply—Input: 115 VAC 50/60 Hz, Output: 24V, 1 Watt

NOTE: We are stating the following weight limits for our rotary tables for continual use.

  • 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)

The rotary tables can hold more weight when they are not under a continual load. Click here and here to see examples of different weights and uses for our rotary tables.

Included Parts:

  • 2 35580 Hold-down clamps
  • 4 30561 10-32 T-nuts
  • 2 40330 SHC Screw, 10-32 X 5/8″
  • 2 40510 SHC Screw, 10-32 X 3/8″
  • 1 37090 Chuck Adapter

Use in laser marking systems

Sherline’s rotary table offers an accurate, stable platform for rotary laser marking applications. Its compact size makes it a good fit in small enclosures. See this YouTube link for a video of a Sherline CNC-ready rotary table in use in a laser marking application on a round part, illustrating the difference between trying to mark on a round part without rotating it vs. rotating it. The video is from Jimani Inc. Laser Marking Systems who use a high-speed motor to drive the table. A Sherline chuck holds the part. A second YouTube video from Jimani shows a typical round part marking operation from start to finish.

Replacement Parts

3058 - 4-Jaw Hold Down Set Assembly
12050 - 8-32 x 3/8″ SHC Screw
12070 - 9/64 Hex Key
10930 - 3/8″ Bearing
37090 - Rotary Table 3/8-16 to 3/4 x 16 Chuck Adaptor
37111 - CNC Rotary Table Assembly w/Worm Housing Assembly (NOT sold separately) 
37123 - CNC Rt Coupling
37124 - CNC Rt Coupling Adapter
37131 - CNC Worm Shaft
37150 - Oil Plug
37160 - Preload Nut
37170 - Rt Lock Pin-Hardened
37200 - 10-32 X 3/8″ Button Head SHC Screw
37220 - 6-32 X 1/4″ Button Head SHC Screw
40050 - Handwheel Assembly
40420 - Headstock Bearing
40530 - 5-40 x 3/8″ SHC Screw
40540 - 5/16-18 X 3/4″ Cone Point Set Screw
40660 - #10 Washer 3/16
40670 - 10-32 X 1/2 ” Skt Hd Cap Screw
50120 - Back Lash Lock Pointer
87510 - Rotary Table Stepper Motor Mount Assembly
67127 - Stepper Motor

87105 - Controller box w/power supply

Download PDF 8700 Instructions

Instructions PDF Download

 




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