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MT3 collets

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chipenter:
I bought a set of MT3 collets from RDG and they woudn't hold the tools , I have some metric collets also new these held well , comaring the two the scuff marks on the metric ones were at the larger end and the RDG ones on the smaller end , as this was solid no wonder they didn't work , turned down a mandrill and clocked up a 20mm metric collet , turned down to 3/4" and ground off 0.002" this made a huge difference in the holding of a tool , did the same for the outher ten , only had one oops set the paper alight covering the bed .

Jonny:
They ok now Jeff.
Have had some from Chester that wont hold or slip. Two full sets imperial and metric in 3/8"BSW, M10 and M12 from Arc no problem putting a cut on.

chipenter:
Only tried the 3/4" one with a 1" end mill 1/4" cut on mild steel no slipping , hope the rest are as good .

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