About the CNC 4″ Rotary Table Indexer
Sherline has taken their accurate and reliable 4″ rotary table into the 21st century with the addition of Computer Numeric Control. 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 this simple keypad. No separate computer is needed. You get everything you need including the 4″ Sherline rotary table with an installed stepper motor, microprocessor unit with numeric input keypad, 115 VAC power source, and all necessary connecting cables.
Vertical Mounting Options
The rotary table comes with clamps and T-nuts for attaching it to the T-slots of a Sherline mill table. In addition, there are two options available for mounting the table in the vertical position or at other angles:
3701 Right Angle Plate—This plate holds the table in the vertical position with a center height of 2.7″. A right angle tailstock P/N 3702 is also available to support long stock held on center in the rotary table.
3750 Tilting Angle Table—This table holds the rotary table and can be fixed at any angle from 0° to 90°. In the 90° position, the rotary table center is also at the 2.7″ height that allows the 3702 tailstock to be used with it.
Operation is very simple
After entering the number of steps per revolution (or the number of degrees per step) on a simple 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.
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 on the Video tab above to see examples of different weights and uses for our rotary tables.
NOTE: The power supply included with this indexer is intended to operate only on 115/120 VAC, 60 Hz (38 W) current. For countries operating on 100, 220 or 240VAC and/or 50Hz a transformer will be required. As an alternative, this power supply outputs 24VDC, 1 Amp (1000 mA). If you can purchase an appropriate power supply that operates on local current and outputs 24VDC, 1A current, it could be used to power the unit instead of the one supplied. Sherline Products does not provide a 220V power supply or transformer.
Always wear safety glasses when operating machine tools.
CNC Rotary Table in Action
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 in 1° increments)|
|Resolution||28,800 steps per revolution (±.006° per step)|
|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|
|10930||(2) 3/8” Bearing|
|30560||(4) 10-32 T-nut|
|35580||(2) Hold-down clamp|
|37100||Rotary table base|
|37110||Rotary table top|
|37121||CNC rotary table worm housing (Not sold sep.)|
|37131||CNC rotary table worm shaft (Not sold sep.)|
|37122||CNC rotary table worm housing assembly|
|37123||CNC rotary table coupling|
|37124||CNC rotary table coupling adapter|
|37200||(2) 10-32 x 3/8” button head socket hd. screw|
|37220||6-32 x 1/4” button head socket hd. Screw|
|40050||1-5/8” handwheel assembly|
|40330||(2) 10-32 x 5/8” SHCS|
|40510||(4) 10-32 x 3/8” Socket head cap screw (SHCS)|
|40520||(7) 10-32 x 3/16” cup point set screw|
|40530||(4) 5-40 x 3/8” SHCS|
|40540||5/16-18 x 3/4” cone point set screw|
|40660||3/16” I.D. washer|
|40670||(2) 10-32 x 1/2” SHCS|
|67100||(4) 8-32 x 3/8” SHCS|
|67130||2 Amp, 100-oz., 23 frame size stepper motor|
|87041||120 VAC power supply (24 VDC, 1 amp output)|
|87100||Control unit with keypad/electronics|
|87250||Motor-to-keypad 6’ extension cable|
|87350||Remote (limit) switch/daisy-chain 1/2 cable|
|87510||CNC rotary table stepper motor mount|
We offer two types of 3D object files: .igs and .stp.
- To view .igs files you need an IGS viewer. CLICK HERE to download a FREE IGS viewer.
- To view .stp files you need a STP viewer. CLICK HERE to use Autodesk’s FREE A360* online file viewer. STP is a file extension for a 3-D graphic file used by CAD software. STP stands for STandard for the Exchange of Product model data. STP files are used to store 3D image data in an ASCII format, following the standards defined in ISO 10303-21: Clear Text Encoding of the Exchange Structure.
- Each 3D file format has been compressed into a .zip file to save file space. Click on the .zip file link below to download it to your computer.
- Extract the .zip file to the drive location of your choice.
- Open the .igs file using the IGS Viewer, or open the .stp file using the A360 Autodesk online viewer.
*NOTE: There are also other free STP viewers that can be downloaded directly to your computer.