3 Jaw Chuck, work through steady rest

vin421 said:
Yes, I have ordered some higher end bearings and hopefully that will reduce the throw out. Problem no. 2 is centering the work all the time. I can do it but it requires patience and I do it by eye. I was thinking a 3 jaw chuck might make it easier and more accurate.
Click to expand...

In theory, you could make a few centered bushings, centerhole-tapered to match the cues, to fit something like a
20mm bore of a steady-hold bearing. Saw (split) the bushings, and they'd act like collets to center the work
in the bore. The problem then is just how to mount a bearing where the steady rest is, and that only
requires a block to mount the bearing (pillow block and some shims, maybe).

So, if it were my problem, a bunch of Delrin/acetal collets would be getting cone tapered centered holes.
Chuck jaws wouldn't be in the way of the work.
 
Yes thanks. I was looking at that combination of things. The pillow blocks are certainly a lot less expensive than most alternatives. I'd have to accumulate a large collection of collets since cues vary from 12mm to almost 14mm but it would be very do-able. Or.... I could set it up so that the pillow blocks slide to the point where they are snug on the cue. I often use shrink tube as a collet. It seems to work well and can fit any size cue. I just have to be careful not to overheat the wood.

I think I am fairly convinced that I need this item:

I made the mistake of buying cheap stuff in the first place and it's not the first time I've made that mistake.
 
vin421 said:
I'd have to accumulate a large collection of collets since cues vary from 12mm to almost 14mm but it would be very do-able.
Click to expand...

Depending on the taper of the cue, and the number of slots cut, you could finger- tighten a simple collet (by sliding it up the
tapered cue) in the cylindrical bearing bore, and might only need two or three to get good coverage of that range.
This place <http://www.cuestik.com/store/product.asp?ITEM_ID=6196> only stocks one-slot collets,
so their compliance range isn't much.
 
OK, I have installed my 3 jaw work thru steady rest, which works beautifully in the sense that once centered properly, it has reduced throw out and virtually eliminated the problem of having to constantly re-center each job.

But.......... now I have a new problem:

My small 1/3 hp motor just won't get the 6 lb 3 jaw chuck up to speed. The motor is definitely overloaded, gets very hot and is just a matter of time before electrical failure takes place somewhere along the line. I am looking to upgrade to about 3/4 hp, say in the 500 - 600 w range.

So any suggestions for a new motor? Brushed, brushless? Brand? Necessary controls? etc.
 
vin421 said:
OK, I have installed my 3 jaw...
My small 1/3 hp motor just won't get the 6 lb 3 jaw chuck up to speed.

So any suggestions for a new motor? Brushed, brushless? Brand? Necessary controls? etc.
Click to expand...

Capacitor-start AC motors are faster-starting than the capacitor-less ones with a centrifugal switch, so
if your motor doesn't have a capacitor (bulge on the side, or maybe a can under the endcap), that would
be a step up. If it IS a capacitor motor, maybe the capacitor is in need of replacement. The motor
will typically have a dataplate specifiying the capacitor (if any) in "MFD" units.
 
whitmore said:
Capacitor-start AC motors are faster-starting than the capacitor-less ones with a centrifugal switch, so
if your motor doesn't have a capacitor (bulge on the side, or maybe a can under the endcap), that would
be a step up. If it IS a capacitor motor, maybe the capacitor is in need of replacement. The motor
will typically have a dataplate specifiying the capacitor (if any) in "MFD" units.
Click to expand...

It has no capacitor.
 
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