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3700 4″ Rotary Table


4″ Rotary Table

SKU: 3700 Category:

Product Description

About the Sherline 4″ Rotary Table

A rotary table used in conjunction with a mill allows a machinist to produce virtually any part he can design. The only limits are size, not complexity. Sherline’s rotary table is a precision piece of equipment that has been designed to work with their vertical milling machines; however, it can be used on any mill whenever the small 4-inch size would be an advantage.

The table is 2″ high and 4″ (100mm) in diameter. The main components have been machined from solid bar stock steel, and the complete unit weighs seven pounds. The table has been engraved with a laser, giving sharp and precise lines every 5°, numbered every 15°. These lines are calibrated with the 72-tooth worm gear that is driven by the handwheel. The handwheel is divided into 50 parts, making each line on the handwheel 1/10°. This allows a circle to be divided into 3600 increments without interpolation. Seventy-two revolutions of the handwheel rotate the table one revolution.

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 continuous load. Click on the Video tab above to see examples of different weights and uses for our rotary tables.

The table T-slots are identical to those used on the Sherline mill and lathe, making the vast line of Sherline tooling available for use with this product. Two hold-down clamps and T-nuts are provided with the table. Also included is an adapter that allows Sherline’s 3- and 4-jaw chucks to be screwed directly to the rotary table. An optional right angle attachment is available (P/N 3701) to mount the table in the vertical position to further increase its versatility. With the table mounted vertically, an optional adjustable right angle tailstock (P/N 3702) can be mounted to the mill table. It is used to support and stabilize the other end of long work held in a chuck or otherwise attached to the rotary table.

A ghost view of the rotary table drawn in SolidEdge
A ghost view of the rotary table drawn in SolidEdge® by John Costello shows the internal mechanism so you can see how the worm gear drives the table. Ball bearings are shown in dark blue.

The rotary table has a unique table locking mechanism that is positive and does not move the table as it is locked. To maintain accuracy and frictionless movements, ball bearings are used. Worm gears are factory greased and the drives sealed to keep out chips and dirt. An oiler is easily accessible to facilitate lubrication of the table. The appearance is instrument quality with a black oxide base, precision ground finishes, and laser engraved markings.

As with all Sherline tools, the illustrated instructions are very useful. The 8-page manual covers the basics of rotary table use and takes the user through a typical project.

Any machinist desiring to take his capabilities to the ultimate levels should consider purchasing and learning to use a rotary table. The Sherline rotary table is an extremely precise and well-built piece of equipment that is sized to fit with our product line. It can also be useful on larger equipment when its compact size is called for.

The rotary table is now also available with a stepper motor mount attached ready for the application of a stepper motor and CNC controls. See P/N 3700-CNC.

NOTE: Because components of the table are ground as a set during production, the P/N 3700 rotary table cannot be upgraded to the P/N 3700-CNC version later on. A new rotary table with stepper motor worm housing must be purchased.

Other Purchasing Options:

3700-OP 4″ Reverse Rotary Table
3700-CNC CNC-Ready 4″ Rotary Table
3750-LAZ Laser Engraving Tilting Angle Table
8700 CNC Rotary Table w/ Stepper Motor and Controller

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.


Always wear safety glasses when operating machine tools.

Download PDF 3700 Instructions

Instructions PDF Download

CNC Rotary Table in Action

10930 3/8″ Bearing
3058 4-Jaw Hold Down Set Assembly
37090 Rotary Table 3/8-16 to 3/4 x 16 Chuck Adaptor
37110 Rotary Table Assembly w/Worm Housing Assembly
37130 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 Y-Axis Handwheel (Crosslide) Assembly
40420 Headstock Bearing
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