Worked on my ER40 Collet Chuck today. All that's left it to thread the nose and get the nut for it.
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roadie33
would you please show/post how you made your ER 40 collet chuck
tks ed
I started with a 3.5" long piece of 2.5" Solid round 12L14.
Step drilled thru the center to 1"
Drilled, reamed then bored just one end to accommodate the 1-1/2" x 8 TPI of my spindle.
Threaded with Internal threading bar. After threads are checked, I threaded it on to the spindle, cutoff to 3.2" length and started turning the piece down to 2 3/8" for 2" of length and 2 1/8" for the Final 1.2" of length.
Drilled 2 holes opposite each other 3/8" deep, 7/16" dia. for bar to tighten and remove from spindle.
For doing the taper for the collet, I watched a couple of you tube videos made by doubleboost that explained how to do it and setting up to bore the taper.
After setting up, I used my boring bar and when I got close I stopped often and tested collet to make sure I didn't go to far.
So far that is where I am at. I just got the extra gears in the mail to do the Metric threading so I will probably be working on that sometime this week.
Still waiting on the ER40 Nut to come in the mail. I hope to have it before I start threading the chuck.