Skill-Craft Company, Inc.
10125 Radiance Drive Ira, Michigan 48023
Phone:586.716.4300 • Fax: 586.716.4399
E-Mail: info@skill-craftcompany.com • Web site: www.skill-craftcompany.com
All Categories > O.D. Diaphragm Chuck  

O.D. Diaphragm Chuck


This is a (4) jaw - 6 inch O.D. diaphragm chuck that was used to hard turn the I.D. of bearing caps. This chuck accommodated (3) different sizes of the bearing caps, where change over was as simple as removing (1) screw from each jaw. This chuck had a positive part stop with a part ejector that was used in a system with robotic load.

There was also a built in air cylinder which incorporated push-pull capabilities. The chuck was built with stir- around screws where the chuck was proven to repeat within .0001 TIR. This particular chuck was used to replace a (3) jaw sliding chuck where performance and maintenance was timely and not cost effective.

Being this chuck was used in a grinding application, the previous chucks were having to be taken off the machine and disassembled every month due to the nature of the grinding process. With the one-piece construction of the diaphragm, the chuck has currently been in use for over 1.5 years with continuous cycle times of 7 seconds.





Custom Diaphragm Chucks  · Diaphragm Chuck Capabilities  · Competetive Advantages & Strengths

Custom Diaphragm Chucks
  • Ideal for high precision turning, grinding, milling, boring, hard turning, inspection
  • One piece construction allows for clamping on O.D., I.D., or pitch-line, thin-walled parts: No metal-on-metal moving parts, causing no wear for long-life
  • Ensures flexibility to engineers or tool designers
  • Will mount in existing machine envelope (jaw height, locator, and jaw inserts identical)
  • 3, 4 or 6 jaw designs available
  • Uniform, variable clamping forces provide a rigid design without part distortion


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    Diaphragm Chuck Capabilities

    Sealed Design
    		• One piece construction eliminates contaminants and costly down time
    • Maintenance free, no lubrication required

    Pull-Down
    		Pulls work piece tight against part stop

    Versatility
    		• Quick change jaws allows for quick turnover
    • No grinding necessary on replacement jaws – part turnover within minutes, not hours
    • Accommodates different sizes using a single diaphragm

    Actuation
    		• Air actuation or push-pull clamping
    • Uniform clamping pressures

    TIR
    		• Repeatability of less than .0002
    • Quick change jaws do not affect TIR


    Competetive Advantages & Strengths
    • Long term ownership (33 years)
    • (3) graduate engineers: Multiple employees with each having 25+ years dedication to Skill-Craft
    • Knowledgeable with both Skill-Craft and non Skill-Craft workholding products: Continuous improvement achieved by transferring this knowledge to own custom designs
    • Repair both Skill-Craft and non Skill-Craft chucks to achieve like new accuracy
    • Excel in back engineering when no prints are available
    • High Powered Expertise/Low Cost Business Structure
    • Latest Automated Design and Manufacturing Technology (CAD, FEA, CAM, CNC)
    • Precision/stability/repeatability (20-50 millionths) at high speeds >5000 RPM’s
    • Collets manufactured to a tolerance of .0001 inch
    • World class reliability and maintainability
    • AAA credit rating



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