Cdco 5c Collet Chuck

Yes Jay that is a option. You could always install the mandrel in a 4 jaw and dial it in if you have one. The beauty of the expanding mandrels like the ones I linked to at Breakheart Tools is they expand with a tapered bolt. You machine a slight amount to get the dia. you need and to be true and then install your part and tighten the bolt to expand the arbor. This holds the part tightly enough to machine it. If you remove the arbor just dial it back in with a part mounted or take another light cut on the arbor. We are only talking a couple thou to be true again so a arbor will last a long time doing the same parts. You might be surprised that hss tools will cut your parts with the correct geometry. I am not trying to talk you out of a collet holder...only giving you other options. I live by the tooling philosophy "some is good, more is better, and too much is just right!

Darrell

Watching this thread with serious interest. I want a D1-4 mount 5C collet chuck too, and CDCO is where I was planning to buy it. It's at least $100 cheaper than the next closest competitors price, and they're probably all made in the same Chinese factory. Very glad to see that if it is not true to specs, it can be fixed with a tool post grinder. Thanks to everyone for such good information!

GG

My Rockwell 11X36 has a 2 1/4 X 8TPI spindle. I sowanted a collet chuck and when I saw the CDCO price i bought it and a blank backing plate threaded to fit my spindle. There are a lot of machine shops around here so I ask a lot of questiond and then tackled the backing plate. #1, I took a face cut to true it with my machine. #2, Measured the recess in the back of the collet chuck, measure 3 times,cut once. #3, After measuring diameter and depth of the recess I turned a positive to fit the collet's hole. #4, I used Heinman? transfer screws to mark the back plate. #5, Drill and counter bore the plate to fit the allen cap screws that mount the chuck to the plate. #6,Take a tiny (read- 0.005) cut in the projected part of the plate to assure the outer lip is in good contact with the chuck. #7,Install plate with mounted chuck on machine. #8, Install collet and test bar (ground round, pin guage, ect) and check runout.
Now, I will admit that I was anal about this mounting but the runout is NIL! On the Last Word guage the needle just bearly moved at all! Now that is a lot of zeros right of the decimal point before there is a whole number. That if you think 0.00001 is a whole number.
I now am tooling up a 13X40 Acra-turn with a D-1-5 spindle and will buy another CDCO plain backed chuck and I found a D-1-5 backing plate. It will be fitted just as the first one and we will see if I was lucky on the first attempt.
I need another D-1-5 backing plate to mount a 4 jaw self centering chuck I've had for years. I do a lot of octagon
barrels and some square work too. It isn't a Buck chuck,if fact it's Polish made,and is accurate enough for 95% of this work. And it's way faster than a 4 jaw independent chuck.

I just got my collet chuck today. Looks pretty nice for the price I paid. Shipping was pretty fast, packed well.

I've not mounted it yet, so can't speak to runout or how it works, but so far I'm impressed with it for the price I paid.

alloy said:

I just got my collet chuck today. Looks pretty nice for the price I paid. Shipping was pretty fast, packed well.

I've not mounted it yet, so can't speak to runout or how it works, but so far I'm impressed with it for the price I paid.

Click to expand...

Let us know how it works out for you.

Ordered mine and a D-1-5 back plate, plus a few other small goodies. Yep, tool junkie for sure. Every bit as addictive but it won't kill you and you can do fun stuff for yourself and friends (sometimes customers too!)