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*Free Shipping on IN STOCK Air Chucks until
January 31, 2019

*Available on in stock items shipped within the USA

COR-LOK Air Shafts and Chucks

The Field-Proven Concept in Core Locking
COR-LOK air shafts and chucks

Unique Air Chuck for Unwinding and Rewinding

COR-LOK air chucks are different. Their unique design provides high-torque core locking with zero core damage. COR-LOK B2 series air chucks utilize inflating tube engineered to fit the COR-LOK spiral internal housing. Inflating the air shafts with pressurized air will actuate COR-LOK's interlocking segments to engage the core and lock it in place. These interlocking segments expand evenly around the circumference and across the width of the core, ensuring even torque distribution in the core's inside diameter. This means your cores will not slip and will not distort during the unwind / rewind process.

Standard air chucks are supplied with thru bores, regardless of length. They may be mounted to any thru bar / shaft; locked in place with CAC's unique split bushing design. Custom designs are available with thru shafts or mounted journals. Standard air chucks may be used in cantilevered and dual support applications.


  • Lightweight - easy to use
  • Interlocking segment design is easy to slide in and out of cores for fast roll changes
  • High torque output to ensure your cores stay locked - no core slipping
  • Interlocking segment design insures zero core damage
  • Perfect replacement / upgrade from tire chucks
  • Engineered inflating tube (bladderless)
  • Built to last
  • 15 Minute maintenance
  • 3" to 12" Diameter cores
  • Industry standard inflation valve (PTV valve)
  • Aluminum (standard), steel, stainless steel and carbon fiber construction available
  • Thru bore design (standard)
  • Standard designs
  • Combine with CAC's unwind and rewind modules for a completed eingeered solution
  • Stocked for 3" and 6" diameter cores - check CAC's stock list
  • Made in the USA
Click here for air chuck specifications

Click filename to view Specification Sheets
Filename  Description
18503-354 3 inch COR-LOK®-B2-PTV Air Chuck
18503-37 COR-LOK® Air Shaft with thru bore
18503-38 COR-LOK® Air Shaft with Journals or Thru Shaft
18503-86 COR-LOK® Shaft for Cantilevered Mounting
18503-39 Cantilevered COR-LOK® Air Shaft w/ Rotary Union
18503-224 6 inch Tandem COR-LOK® Air Chucks
18503-341 6 inch Tandem COR-LOK® Air Chuck Style Core Adapter


Inside CAC's COR-LOK® Air Chucks

COR-LOK air shafts and chucks

COR-LOK® air chuck dimensions
  A B C D E F G  
Core size Deflated
Expanding length Overall
End cap,
valve end
End cap, plain end Approx.
3 2-15/16 *3-1/8 Up to 1-3/4 5 7.5  1.5 1 2 lbs
4 3-15/16 4-3/16 Up to 2-1/2 5 7.5  1.5 1 2-1/2 lbs
5 4-15/16 5-3/16 Up to 3 5 7.5  1.5 1 3 lbs
6 5-15/16 6-3/16 Up to 4 6 8.5  1.5 1 12-1/2 lbs
6-3/4 6-11/16 6-7/8 Up to 4 6 8.5  1.5 1 13 lbs
7 6-15/16 7-3/16 Up to 5 6 8.5  1.5 1 13 lbs
8 7-15/16 8-3/16 Up to 6 6 8.5  1.5 1 15 lbs
9 8-15/16 9-3/16 Up to 7 6 8.5  1.5 1 17-1/2 lbs
10 9-15/16 10-3/16 Up to 8 7 9.5  1.5 1 22 lbs
11 10-15/16 11-3/16 Up to 9 7 9.5  1.5 1 25 lbs
12 11-15/16 12-3/16” Up to 10 7 9.5  1.5 1 27 lbs

              Notes:    1) All dimensions in inches. Thru bores machined .010” - .015” oversized unless otherwise specified.
                            2) Custom and metric core sizes available, please contact us at (800) 433-2413 or
                       for more information.

              *3-3/16” inflated diameter is attainable with leaf and retainer design (only). Contact us for more information.


Valve Options

COR-LOK® air shaft and chuck valve options

Need more Information?

Tech tip: Air chucks or air shaft, which should you choose?

CAC COR-LOK® Air Shafts and Air Chucks are manufactured under U.S. Patent Numbers: 3825167, 3917187, 3937412, 4124173 AND 4944468

Check out our other Core Support Systems solutions
Air shafts and chucks Aluminum core cones

Air shaft with lateral adjust Mechanical shafts and chucks

Air shaft with self contained inflating valve COR-LOK® Core Adapters

COR-LOK® end and center plugs COR-LOK® XE series pneumatic chucks

Air chuck standard dimensions Air shaft standard dimensions

Air shafts and chucks support center Air Chucks and Core Cones In Stock

See our COR-LOK® videos - click here!

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Application story featuring our COR-LOK® and Fox TrimAway® System

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Converter Accessory Corporation
201 Alpha Road
PO Box 188
Wind Gap PA 18091-0188

Phone (800) 433-2413 -(610) 863-6008
Fax (800) 709-1007 - 610) 863-7818

What is Web Handling?
Web Handling is the science, engineering and equipment necessary to successfully transport a continuous flexible material through various processes without defect. Enhancing Web Handling with proper equipment will ensure materials are processed at their maximum efficiency, allowing the process to generate maximum profits.

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