TER Solid Shrink Collet Gets A Grip

a traditional collet system at a customer Developed and patented by the Bilz division of LMT, the TER Shrink Collet, now want 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 direct clamping of tools by the shank in the machine tool spindle. TER can be used on tool shanks between 3 mm and 20 mm 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 10 mm shank tool was reduced from 75 secs to just 30 secs and finish machining with a 6 mm shank tool lowered by 3 secs to 17 secs. Due to the higher rigidity of the tooling setup, cutter life was increased from 500 to 1,500 parts on both rough and finish cycles.

The shank of the tool is secured in the TER holder by heat skrinking, a quick acting thermally based process normally taking under 30 secs to accomplish. This has the effect of creating a single unit want of tool and holder to ensure maximum rigidity and stability between the machine spindle and cutting tool.