3C Collet Headstock

Includes 1″ spindle wrench and spindle bar (chuck arbor and collet not included, shown for reference only)

SKU: 30113 Category:

Product Description

About the 3C Collet Headstock

As with many of our accessories and machine modifications, our decision to make a 3C Collet Headstock was based on customers’ requests. Many of our customers over the years have requested a spindle and collet that would allow larger diameter stock to go through the headstock. With the 3C collet, our customers can now hold stock up to 1/2″ diameter that will pass through the headstock.

When we designed our 3C Collet Headstock we also designed it so it would be interchangeable with our standard headstock. The centerline height is the same. The mounting system is the same. Therefore you can easily switch from any of our other headstocks to the 3C headstock.

The 3C Spindle is electroless nickel plated to aid in rust prevention and to increase the surface hardness of the spindle for durability.

We made the 1″ spindle wrench to go with the headstock to tighten and loosen the collets. The wrench is in a size range that will allow you to exert sufficient force without exerting excessive force. It is also in a size range that will make it easier to handle (than a standard 1″ wrench) when you are tightening and loosening the collet. Also included, is a “Tommy” bar that is inserted into one of the “Tommy” bar holes on the 3C headstock draw-bar knob. This is to aid in tightening and loosening the 3C collet.

If you wish to use a chuck with the 3C headstock, you can purchase the 3C to ¾-16 chuck arbor. All of our 3- and 4-aw chucks with a ¾-16 thread will fit on this arbor.

When it comes to making the 3C collets we can’t compete with the cheap import collets, and companies like Hardinge already make quality 3C collets in many sizes. Therefore, we leave it up to you to decide who you want to buy your collets from.

NOTE: Certain attachments, like the Thread Cutting Attachment, will NOT work on the 3C Collet Headstock. The Lathe Power Feed also will NOT work on with the 3C Collet Headstock. If you are uncertain if an accessory will work with the 3C Collet Headstock please call for more information.

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 30113 Instructions

Instructions PDF Download

Headstock Specifications
TIR (total indicator runout) at spindle nose 0.001″ (Better runouts may be attained upon request)
End play at factory preload setting 0.0002″ (preload is adjustable)

40580 Spindle “Tommy” Bar

40105 3C Headstock Case
40233 3C Headstock Spindle
43233 3C Main Spindle Pulley
40163 3C Preload Nut
40430 3C Headstock Bearings (2)
40260 Precision Ground Head Key
30117 3C Collet Draw Bar
30118 3C Collet Draw Bar Knob
30123 3C Headstock Spindle Bearing “Washer”
30124 3C Drawbar Thrust Washer “Inner” .126″
30125 3C Drawbar Thrust “Needle Bearing”
30126 3C Drawbar Thrust Washer “Outer” .032″
40540 5/16-18 X 3/4″ Cone Point Set Screw (2)
30127 3C Spindle Key Way Set Screw
30128 3C Spindle “End Cap”
37160 Rotary Table Preload Nut
43234 3C 1″ Multi-Wrench
40520 10-32 x 3/16″ Cup Point Set Screw
30129 5-40 x 1/8″ Cup Point Set Screw
40580 Spindle “Tommy” Bar

We offer two types of 3D object files: .igs and .stp.

  1. To view .igs files you need an IGS viewer. CLICK HERE to download a FREE IGS viewer.
  2. To view .stp files you need an 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.
  3. 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.
  4. Extract the .zip file to the drive location of your choice.
  5. 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.

CLICK HERE to download the 3D IGS file
CLICK HERE to download the 3D STP file