ER11 Spring Collet 1/4" for CNC Engraving Milling Lathe – 0.005mm Precision

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.

Awesome Chuck. Just as advertised.

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".

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

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.

Seems to be working as expected

Good enough quality for my hobby CNC no noticable runout.

Arrived quickly! Does what it is supposed to do

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

Ideal for holding 1/4" shank tolling in my 3018 CNC, which only came with a 1/8" collet.

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.