the TER shrink collet
Through the new solid holder, tool life can be increased by up to 300 per
songre cent with added precision available to the cutting process by maintaining run-out at the tool tip within three microns TIR.
Developed and patented by the Bilz division of LMT, the TER shrink collet, now available through LMT UK of Meriden in Coventry, is a straight replacement (DIN 6499) for the traditional spring-based collet used in a chuck and driven tool holder for the direct clamping of tools by the shank in the machine tool spindle.
The TER can be used on tool shanks between 3mm and 20mm in diameter and will be accepted by normal collet holders without the need for a sealing disc.
By changing over to the TER shrink collet from a traditional collet system at a customer for both rough and finish machining on a 10-axis Index G 200 turning centre, rough machining time using a 10mm shank tool was reduced from 75 seconds to just 30 seconds and finish machining with a 6mm shank tool was reduced to 17 seconds.
Owing to the higher rigidity of the tooling setup, cutter life was increased from 500 to 1,500 parts on both rough and finish cycles.
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