Fit all R8, morse tapper, CAT BT CNC ER32 chuck or holder
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Don't drop any good collets into those rough and junk tool holders.
The total run out is holder and collets combined
If one goes bad, you'll see large run out and won't be running true
See two video below, the indicator is same, which is 0.0001", first video shows my tool holder with collets is about 0.0003" accuracy, then the 2nd video shows tool holders alone are 0.0001", you do the math, so the run out of collets is 0.0003-0.0001", my promise on collets are 2 to 3 tenth. Total runout is holder and collets combined, so you may need a good set of tool holder as well in order to run collets true
cat40er3211
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cat40er32
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Features:
Made of high grade spring steel
Ground roughness is Ra0.4 Microns, plus overall fine polish 20PC Set: From 2mm-20mm increase by 1mm. All metric size are 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20mm
T.I.R.: 0.0003" or 5um. In order to make all collets running true, on your side, make sure your machine spindle and chuck holder running true, on my side, I'll make sure all those collets running in tenth.
Seems
like all sellers claim their collets are in 3-5 tenth, but yes or no,
only customers can tell. Copy other sellers products description is
easy, but make all collets running true is difficult. If you bought
collets with more than 2 thousands run out, don't think I'm selling the
same.
Special angled slots increase rigidity
Better overall balance of tool holder assembly
Protects tool holder from contaminants
Use
with any standard ER collet chucks for coolant-thru
tool applications.