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Reviews (4)

Jul 15, 2019
Neat accessory
I'm very happy about the quality and function of this tool. I wonder why Criterion didn't think of it?
125MM DIAMETER, D1-4 ER-40 COLLET CHUCK (3901-5042)
Jan 22, 2016
Pretty accurate and a great value
Pros: Very low runout - 0.0002" on my Emco Super 11. Looks pretty good. The machining all seems pretty good. The nut threads are smooth and tight, stc
Cons: Not finished to the standards of ETM/SPI/Bison etc, but understandable considering it's a fraction it's very low price. The metal is soft and dents easily. I don't know about the actual ER taper but the back D1-4 nose interface doesn't seem hardened.
Overall: This is a lot of chuck for the money! It is accurate but might wear quickly if heavily used. It will work very well for what I do. If it didn't have the cons listed I would give it 5 stars. As it is I'm grateful it's available and very pleased to buy it. Be careful to clean all interfaces before concluding anything about the runout. There will probably be an orientation that has the lowest runout. The camlock pins were too far out on my unit and I had to screw them in one or two turns to get proper engagement - not a big deal, just remove the socket cap screw and turn the pin.

Aug 16, 2021
Fun Fun Fun!
Really nice item. Very attractive when assembled. Was challenging, stick with it if you find it hard as it will go together!
