ER11 Spring Collet 1/4" for CNC Engraving Milling Lathe – 0.005mm Precision | High-Precision 1/4" ER11 Collet Made Of 65Mn Steel With ≤0.005mm Runout – Fits Standard CNC Engraving and Milling Tool Holder

This is an er11 collet for 1/4 inch cutters. Very handy for cutting foam and things of the nature. It fit the collet well, runs true. It is quite hard to remove from the nut as the snap ring is sharp but it can be done with a little work. Overall, I'm pleased. Remember, I'm cutting foam so if you are using very thin resharps, they need to run exactly centered and Very fast of you will break cutters in less than a second. Your mileage may very.

Seems to be working as expected

My cnc unit only came with a 1/8 insert. This 1/4 fit my motor perfectly and allows me to use a lot of sturdier bits in my cnc. This is a must have accessory for stock cnc motors under 300w.

I can't comment on the tolerances, but it fits my ER11 spindle & .25 inch end mills.

Good enough quality for my hobby CNC no noticable runout.

Arrived quickly! Does what it is supposed to do

I purchased this so I use 1/4" bits with my 4030 ProVer. It works great, but do yourself a favor by getting another nut to go with it, they are a pain to change collets out of the nut, especially getting the 1/4" out to go back to 1/8".

Fits exactly

On the delivery, arrived a little before the actual indicated delivery, very happy with the product

Very soft material after two uses it falls out of the nut by itself, does not open, hard to push 1/4" shank in. Other than that, usable with some fiddling.