Page 13 - Parlec Catalog

Concentricity, Rotational Speed, & Balance

Selection Guide 11

SELECTING THE BEST COLLET TYPE TOOLHOLDING SYSTEM

ERos System
®
Designed to provide the ultimate in Extreme performance. ERos offers all of the benefits of a collet system
®
but is designed to eliminate all of the errors that come from the typical collet flexible collapse system.
ERos is ER ON SIZE. Machined for the best fit and precision without the forced collapse provides the best
®
combination for precision, rigidity, grip force and speed.

ER Collet System

This system is the best of the production and higher quality systems for flexible machining operations. It is
available in different configurations to address the precision, quality and ruggedness to fit a wide spectrum
of drilling and lighter milling applications. Great balance of precision, rigidity, grip, speed and durability and
affordability.
Power Milling Chucks

Good product to use when heavy rough milling with either cobalt or carbide solid tools. Typically they would
be used when the speed is lower and the feed per tooth is higher. The system has very good concentricity and
very good grip force.

Single-Angle Collet Chuck System
Good general purpose product for many years. The longer collet with a lower angle provides good grip force.
The design uses an acme thread to give strength to the clamping nut thread. The result is good durability but
will not center the nut providing a large mass variable for balance. Suitable for larger drills at lower RPM’s.

Double-Angle Collet Chuck System

Two separate clamping angles allow significant error between the collet and the collet seat. This results
in poor concentricity and poor grip force. The nose diameter of the Extension style gives the best radial
clearance of any system. The price is extremely low, but the value in not good based on minimum control of
tolerance and lack of performance.

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