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Back to 3-Jaw Self Centering Chucks
3.1″ 3-Jaw Chuck
Includes 2 tommy bars, not pictured
Product Description
This larger chuck takes up no more center-to-center space than the 2.5″ chuck, but it will hold larger work. It has a clamping range of 3/32″ (2 mm) up to 1-1/2″ (38 mm) diameter with the jaws in the normal position. With the jaws in the reversed position, work up to 3-1/4″ (82.5mm) can be gripped. The hole through the chuck is .687″ (17 mm). Rotating the knurled ring closes all three jaws simultaneously to grip round or hexagonal stock quickly. Tommy bars (provided) are used in the side holes to tighten and loosen the chuck for more leverage. The chuck has a 3/4-16 thread to fit Sherline’s spindle.
Jaw Options
- For those who have jobs where speed and ease of use are more important than maximum accuracy and want a chuck that is loose right from the start (No extra charge).
Add the note “loose jaws” to the comments box above - Soft (not hardened or machined) steel jaws are also available when you build your own chuck.
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Always wear safety glasses when operating machine tools. |
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Download PDF 1040 Instructions
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| Chuck Diameter | 3.1″ |
|---|---|
| Jaw Capacity | With jaws in normal position: 3/32″ (2mm) – 1-1/2″ (38mm)
With jaws in reverse position: 3/32″ (2mm) – 3-1/4″ (82.5mm) |
| Through Hole Diameter | .687″ (17mm) |
| Thread Size | 3/4-16 |
| Chuck Body Material | 12L14 Steel |
| Chuck Jaws Material | 12L14 Case Hardened Steel |
| I.D. Holding diameter of jaws NOTE: The diameters shown on the print can vary as much as .010-.020 depending on the amount of material that is removed during the grinding operation. Click on the image for a larger view. |
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| Part No. | Description | Quantity |
|---|---|---|
| 10401 | 3.1″ 3 Jaw Chuck Body *Not sold separately | 1 |
| 10402 | 3.1″ Chuck Scroll *Not sold separately | 1 |
| 10413 | Chuck Retainer Ring | 1 |
| 10414 | 3 Jaw Chuck Jaw* | 3 |
| 40580 | Tommy Bar | 2 |
*Because chuck jaws are factory ground to precisely match each chuck body you must send your chuck back to us to be fitted with new jaws. Please contact us for instructions on how to return your chuck.
Click the P/N below to download a zipped version of the IGS 3D CAD file. You will need to extract the zip file before viewing the IGS file.
1040 3.1″ 3-Jaw Chuck 3D IGS model
You need an IGS viewer to view .igs files. CLICK HERE to download a FREE IGS viewer.
Shipping
We do not charge a flat rate for shipping because of the variations in weight for our products. Instead, we charge you what the shipping company charges us. Our website uses a shipping calculator based on the daily rates for USPS and UPS based on the weight and destination of the shipment. You can also have us use your UPS/FedEx account number to charge your shipping. Just enter it in the appropriate box on the checkout page.
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.
Returns
Most merchandise can be returned within 30 days 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.
The MASSO G3 CNC controller, power supply, stepper motors, cable system and optical encoder are sold as a part of our Accu-Pro line of machines and are not available for purchase separately or as an upgrade option to existing machines.
Related products
Build Your Own Chuck
Custom build your own 3 or 4 jaw chuck. Choose from 2.5" or 3.1" body size and a variety of jaw options. For more information and technical specifications of the chucks or jaws themselves please see their individual pages below.
3-Jaw Self Centering chucks 4-Jaw Self Centering chucks 4-Jaw Independent chucks Various chuck jaws
Lead time for custom built chucks is 4-5 business daysSelect options
