Indexing Attachment

Indexing Attachment

SKU: 3200 Categories: ,

Product Description

About the Indexing Attachment

Many times a machinist is required to machine features into a part that are located in a radial pattern instead of linearly. Examples of such features are the flats on a nut, the teeth on a gear or the splines on a shaft. The Sherline indexing attachment is a unique design that provides a very economical means of accurately rotating a part so that these kinds of features can be machined.

The attachment consists of:

  • An indexing head and a tailstock mounted on a 12″ long dovetailed bed
  • A rack gear that is used to measure radial movement
  • A gear tooth cutter holder
  • A high-speed steel tool blank

The indexing head utilizes a spindle with a #1 Morse taper and a 3/4-16 male thread identical to the spindles on the Sherline lathe and milling machines.

This enables the use of all the Sherline accessories such as the faceplate, 3- and 4-jaw chucks, Drill Chuck, and centers with the indexer. A built-in mechanism detents the spindle every 5°, and there is also a red laser engraved collar that indicates rotation in 1° increments.

The rack gear mentioned previously provides a means of accurately positioning the spindle where positioning in other than 5° increments is required. The gear inserts into the indexing head and engages an index gear. This transfers the rotary motion of the spindle into linear motion that can be measured with the depth rod of a Vernier caliper. Simple calculations then permit accurate indexing to an infinite number of positions.

The indexing attachment can be attached directly to the table of the Sherline milling machine, or the indexing head can be used by itself in a horizontal position similar to a rotary table. The indexing attachment is not recommended for use on the Sherline lathe with the vertical milling column; however, with the use of shims to elevate the unit high enough to clear the crosslide handwheel, it can be done.

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 Instructions

Instructions PDF Download

3005 HS Steel Tool Blank
30561 (2) 10-32 T-Nuts
30881 1/4-20 X 5″ Hex Head Bolt
30882 1/4-20 Bolt Washer-Oxide
31070 1/8 x 3/8 Gear Dowel Pin
31080 10-32 x 3/8″ Set Screw
32010 Index Bed
32020 Index Lock Pins-Hardened
32030 Index Spring .015″
32100 10-32 Hex Nut
32120 Boston Rack, 48 Pitch
32130 Indexing Case
32140 10-32 x 1/2″ Cup Point Set Screw
32170 Gear Tooth Cutter Body
32180 Thumbscrew 10-32 X 1″
32190 (3) 10-32 x 1/2″ Skt Hd Flt Screw
32200 Indexing Cover
32210 (3) 6-32 x 3/8″ SHC Screw
32220 Index Gear 72 Tooth, 48 Pitch
32230 Indexing Spindle
32240 Index Stepping Lever
32250 Index Tailstock Center
32261 Index Tailstock Case (04/01)
32262 Index Tailstock Case Gib
32280 Dowel 1/16 x 5/16
32290 Dowel 1/16 x 7/16
32500 Index Graduation Collar
32510 6-32 x 1/8″ Nylon Tip Skt Hd Set Screw
35580 (2) Hold Down Clamp
40070 Faceplate
40090 Drive Dog
40330 (3) 10-32 x 5/8″ SHC Screw
40340 10-32 x 1″ SHC Screw
40380 No. 1 Morse Center
40500 10-24 x 3/4″ SHC Screw
40501 (2) 10-32 x 1/2″ Button Hd Hex Screw
40520 (2) 10-32 x 3/16 Cup Point Set Screw
40540 5/16-18 x 3/4″ Cone Point Set Screw
40660 #10 Washer 3/16