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Collet tensioning spindles take on important tasks under advanced conditions in the fields of fine machining, turning, grinding, hobbing and checking.
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EXPANDING MANDRELS
Features and Advantages
• Ability to accommodate a very generous component bore tolerance
whilst maintaining concentricity.
• Quick and secure clamping.
• Facility to link to existing machine mechanisms.
• Consolidation of components against backstops.
• Positive clamping and release mechanism.
• Single tapers to ensure maximum support, where feasible.
• Interchangeable sleeves to cover a range of component sizes.
• Controlled datums.
Opportunity to Achieve:
• Higher machining precision(concentricity to 0.005 mm TIR)
• Lower production costs.
• Increased output.
• Reduction in operational sequences.
• Reduction in loading, unloading and ejection times.
• Reduction in reject rates.
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The N.A. Woodworth Tork-Lok collet line offers flexibility and affordability, with much of the product available from stock. The Tork-Lok Arbor locates straight and tapered holes on ture center within .0005 T.I.R. These arbors feature patented inclined flats that provide full arbor / collet contact throughout the range of operation for highest accuracy and torque transmission. Features include:
- Flat surfaces are in constant contact on both expansion and contraction, providing higher accuracy.
- Precision mated flats provide for greater torque transmission .
- Built in safety stops control both expansion and contractions, thereby reducing collet breakage
- Metal to metal contact excludes foreign matter which in turn reduces wear and assures accuracy
- Preload features assures easy part removal
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EXPANDING MANDRELS AND COLLET CHUCKS
Expanding mandrels are the ideal solution to many workholding problems. By holding parts on most of the datum bore (or outside diameter in the case of a collet chuck) the clamping forces are evenly distributed, reducing distortions during part manufacture.
Mandrels also provide a superior method of holding parts which are high volume, have short cycle times or require the highest levels of concentricity.
Chevin manufacture expanding mandrels tailored to your exact specifications. Many different mounting styles are available, including: spindle nose, between centers, Morse taper and faceplate. Different actuation methods can be used, such as drawbar, cantilever nut and front nut.
Every expanding mandrel or collet chuck supplied by Chevin can have the following features:
* Single taper sleeves
* Positive clamping and release
* High levels of concentricity – to 0.0002" T.I.R
* Controlled datums
* Sleeve interchangeability
* Generous expansion capacities
All of the above permit quick and secure clamping creating versatility and ease of use.
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In internal or external tightening for machining or control, they tighten concentrically with precision on all their periphery of the ranges of tightening, very short, fragile, stopped, of the full or hollow parts.
They are carried out containing discs, of membranes, diaphragm, casings, mechanical or hydraulic conical sleeves up to 1 meter diameter
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