View attachment 322371
I am trying to find the taper collet that fits this dividing head. I took measurements as best I can and they show a taper of 0.040 per inch. This taper seems to match the Brown & Sharp #8 taper collets but these use a threaded rod from the rear to tighten it and not the front nut. Also, no one seems to carry #8 B&S taper collets. Any help would be much appreciated; I have included pictures of the dividing head and a drawing with dimensions.
Thanks !
Eugwine
I do not recognize that DH, but..'
I have the not-terribly uncommon "Ellis" A light, compact, combination DH and indexer.
And it DOES use a #9 B&S taper.
As well as a threaded nose that wasn't SUPER rare - a few lathes used it - but has become hard to find.
So yes, a B&S is probably the correct taper for your one as well.
"Reason?" Well.. my Ellis is the right size for use with my mills. And two of them use #9 B&S tooling. Which DOES have a threaded arse for a drawbar, not only on collets, but milling-cutter holders and all other B&S #9 (I have lots of it).
They may exist, but I've never seen a nose-nut closer on a B&S collet.
Always drawbar.
B&S is also considered a falr-decent "self holding" taper. More so than Morse when under side load, rather than end-load, anyway. That's WHY B&S was used on mills, MT on drills.
Commonality could have been an economic advantage in a small shop "back in the day" when a Morse taper was more common on a drillpress.
- Few drillpress operations are likely to need a DH.
- MANY milling operation
can make use of a DH.
Downsides?
The only NEW B&S collets I've seen easily found were Chinese-made and sold by H&H Industrial.. in #7 B&S or #9 B&S. Only.
B&S Taper
I have a set in #9 B&S. decent enough. I just don't much use them, given I have side-lock milling-cutter holders, PDQ-Marlin.. and more.
India made (at least) B&S #9, #10, #11 as well. Can't find the link now.
All else is even scarcer unless found used.
Hope yours is NOT a #8, but either of the more common #7 or #9, rather.
Collets? Not easy to DIY.
B&S taper tails? Not HARD to DIY.
So you COULD adapt even just ONE such tail to a nose-nut-closer collet system.
There are several of those around.
Same again a small chuck if your threads for a backplate are uncommon.
One or two B&S tails, #8 if that IS what it is, and you could be "in business" with a handy, small, light, DH.
Age doesn't much matter, so long as it isn't damaged. It is really RARE for a DH to get "worn out". They just aren't used all that often.
2CW