Individual WW Collets


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Product Description

About Sherline WW Collets

Collets provide a quick, easy method of mounting cylindrical parts or bar stock in the lathe with a great deal of centering accuracy. Each collet is actually a small, precision 3-jaw chuck that fits into a special tapered adapter in the headstock. A drawbar that passes through the headstock and threads into the backside of the collet is used to draw the collet up into the tapered adapter. The adapter causes the jaws of the collet to close down, gripping the part to be machined. Typically, collets provide a very accurate part mounting system, but each size collet can accommodate only a small range of diameters of approximately ±.001″ (.02mm).

WW collets differ from milling collets in that they have a hole all the way through the collet and drawbar. The maximum diameter stock that can pass entirely through the collet is 3/16″ or 4.5mm, although collets are available up to 5/16″ and 8.0 mm. The WW collets that are larger than the through-hole diameter are sometimes referred to as “pot” chucks.

Collet Accuracy

These collets have a maximum runout of .002″ or less. If the WW collet adapter is trued in as suggested in the instructions, it will run dead true. This will allow the collet runout to be at its best. Collet sizes above 3/16″ (4.5mm), considered pot chucks, are not bored through. They are only bored .260″ deep and depending on your setup and length of the part, you may experience greater runout further away from the front of the collet.

Sherline Collets Are Numbered Logically

  • Inch collets all begin with part number 1160 followed by two digits which indicate the size in 64ths of an inch. For example, a 13/64″ collet would be P/N 116013 and a 1/4″ collet (16/64″) would be P/N 116016.
  • Metric collets all begin with part number 1178 followed by two digits indicating the size in 0.1 mm increments. For example, P/N 117813 is 1.3 mm.

These collets are not hardened. They are manufactured by Sherline and are built to standard WW specifications; however, we have come across collets that are called “WW” but will not fit our drawbar and adapter. Sherline collets have a shank diameter of .312-.313 and a .275-40 thread. Be sure to check WW collets made by other manufacturers to be sure they fit our adapter before you purchase them. Sherline manufactures a slightly larger .315″ adapter and drawbar set (P/N 1163) that will accommodate some of these other brands of 8 mm collets.

Sherline WW collets are available in inch sizes by 64ths of an inch from 1/64″ to 5/16″. Metric sizes go from .3 mm to 8.0 mm by .1 mm increments. See the drop-down menu above for sizes and part numbers. Special sizes up to .320″ can be special ordered with approximately a 3-week wait (please call or email for more information). Larger collet “pot” chucks are also available.

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 1160 Instructions

Instructions PDF Download

Download PDF Sherline WW Collet Comparison

Instructions PDF Download

Click the links below to download a zipped version of the IGS 3D CAD files. You will need to extract the zip file before viewing the IGS file.

The Large Body Collet model covers the following size range:
Inch: 3/16″ to 5/16″
Millimeters: 4.6mm to 8mm

Large Body Collet 3D IGS Models

The Small Body Collet model covers the following size range:
Inch: 1/64″ to 3/16″
Millimeters: .3mm to 4.5mm

Small Body Collet 3D IGS Models
You need an IGS viewer to view .igs files. CLICK HERE to download a FREE IGS viewer.