3C Lever Collet Closer

SKU: 3025 Category:

Product Description

Figure 1—3C Lever Collet Closer
installed on a 6600 Chucker Lathe.
Click on image for a larger view.

Anyone doing repetitive lathe operations on small parts will find this new accessory saves a lot of time when holding parts in a 3C collet. Instead of loosening and retightening the drawbar each time a part is inserted, with this closer you make that adjustment just one time. After that, the collet is released and retightened simply by pushing a lever back and forth. Moving the lever to the right releases the part from the collet, a new part is inserted, and the lever is moved back to the left to lock the part in the collet.

Long stock up to 1/2″ in diameter can be held through the 3C collets and spindle. Larger parts can be held in one of our 3- or 4-jaw chucks with the use of our chuck adapter (P/N 10670).

With the addition of the 3C Lever Collet Closer, our customers are one step closer to full automation of their 3C collet headstock. We used the same tried and proven design as our 1150 Lever Collet Closer along with the same high-grade materials and hardened steel parts. This is a very well designed accessory and very durable. It will give our customers years of trouble-free, dependable use.

NOTE: The Standard Lever Collet Closer and 3C Lever Collet Closer were designed to be used with our standard pulley set, which has a maximum RPM of 2800. It will work with the 10,000 RPM pulley set; however, the parts are going to wear faster, and any vibration that is in the yoke is going to be increased.

Easy Installation

  • Easy to install—Remove the end piece from your 3C headstock spindle and replace it with the spindle mount sleeve. Use the 5-40 x 1/8″ set screw to keep the part from threading off during use. Note: Just tighten the set screw until it is snug, DO NOT over-tighten it.
  • Using the screws that are supplied, mount the base to the 3C headstock riser block, or to your Sherline Lathe base.
  • Installation and operation are covered in the thorough, illustrated instructions that come with this accessory.

IMPORTANT NOTE: The 3C Lever Collet Closer ships with a mounting base, however, you will need to select the proper mounting base for your needs when placing your order.

  • P/N 11520C—Standard lathe mounting base (4000 and 4400 models)
  • P/N 11521C—Chucker lathe mounting base (6600 models)


See Cary Millsap’s Tip #75 on how to install a removable tach sensor.

Figure 2—Shows the two 10-32 holes
machined into the top of the 3C headstock.
Click on image for a larger view.

NOTE: We have plans to manufacture and offer a bar feed system to our 3C headstock. In the meantime, our 3C headstock already has two 10-32 holes machined into the top of it (see Figure 2) for the addition of a pneumatic cylinder in order to fully automate our 3C lever collet closer.

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 3025 Instructions

Instructions PDF Download

11501 LCC Handle Shaft
11502 LCC Handle Knob
11503C 3C LCC Hub
11504C 3C LCC Guide Ring
30118C 3C LCC Drawbar Knob
11507C 3C LCC Ball Carrier
11508C 3C LCC Knob Adapter Plate
11509C 3C LCC Thrust Collar
11510C 3C LCC Drawbar Tube
11512C 3C LCC Spindle Mount sleeve
11514C 3C LCC Cam
11516C 3C LCC Cam Cap
11518C 3C LCC Cam Shoe
11521CL 3C LCC Base (Order for the Chucker Lathe)
11520SL 3C LCC Base (Order for the Standard Lathe)
11522C 3C LCC Yoke
11524C 3C 3/16″ X 1″ Harden Steel Dowel Pin
11526C 3C 3/16″ X 3/4″ Harden Steel Dowel Pin
11528 5-40 x 3/16″ Cone Point Set Screw
11530C 3C 3/16″ Steel Bearing Balls
11532C 3C 10-32 x 1/4″ Dog Point Set Screw
11534C 3C 10-32 x 3/8″ Half Dog Point Set Screw
11535C 3C 10-32 x .513″ Set Screw w/ Spring Loaded Ball
11537 5-40 x 1-1/2″ SHC Screw
11538 4-40 x 3/16″ SHC Screw
30129 5-40 1/8″ 3C Set Screw
40340 10-32 x 1″ SHC Screw (for Chucker Lathe Base)
40550 5/32″ hex key (not shown)
40570 3/32″ hex key (not shown)
40690 10-32 x 3/4″ SHC Screw (for Standard Lathe Base)
40720 10-32 x 1-1/2″ SHC Screw

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 with Chucker Lathe base
CLICK HERE to download the 3D IGS file with Standard Lathe base
CLICK HERE to download the 3D STP file with Chucker Lathe base
CLICK HERE to download the 3D STP file with Standard Lathe base


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Domestic orders are shipped Monday – Friday. Expedited orders must be placed by 9 am PST to ship the same day.

Orders shipping ground have a processing time of 7 working days for domestic orders and 14 working days for international orders. Click here for more information on our shipping and order policies.


Most merchandise can be returned within 30 day of the purchase date. A refund will be issued to the original form of payment at the original selling price. View our complete return policy and/or start your return online here.