WTB MT5 Tooling for Horizontal Boring Mill

marka12161 · Aug 19, 2020

I'm looking for #5 Morse Taper tooling for an old 3" HBM. Must have the slot for the retaining key. I'm most interested in face mill arbors, an assortment of end mill holders or a collet chuck. At some point i may be interested in align boring bars but my machine has not outboard support so these are a lower priority.

Thanks
Mark
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eKretz · Aug 19, 2020

Just FYI, on a lot of jobs you don't really need an outboard support. You can simply make a bushing to fit in another bore further along and let the bar ride in that. Won't work for everything of course; if your part has only one bore all the way through or is a split cap for instance. Just be sure to add some provision for drip oiling the bushing while you're working. A suspended plastic 1 liter soda bottle with a hose into an oil hole works fine, just add a throttling valve to the middle of the hose.

marka12161 · Aug 20, 2020

eKretz said:
Just FYI, on a lot of jobs you don't really need an outboard support. You can simply make a bushing to fit in another bore further along and let the bar ride in that. Won't work for everything of course; if your part has only one bore all the way through or is a split cap for instance. Just be sure to add some provision for drip oiling the bushing while you're working. A suspended plastic 1 liter soda bottle with a hose into an oil hole works fine, just add a throttling valve to the middle of the hose.

Thanks, I've seen this set up and after some thought, i think this may actually be better for me than an outboard support. This particular machine has a 5 ft x 3 ft table which is larger than most 3" spindle machines. It also has a shorter bed than most machines in this class so an outboard support would further restrict the longitudinal table travel. Thanks for the tip.

johnoder · Aug 20, 2020

Looking at Scully Jones #500 catalog from 1942 - the retainer slots varied in detail from maker to maker - with no coverage of Universal

Another interesting page - 50 taper adapter using retainer key to retain special 50 taper stuff

marka12161 · Aug 20, 2020

johnoder said:
Looking at Scully Jones #500 catalog from 1942 - the retainer slots varied in detail from maker to maker - with no coverage of Universal

Another interesting page - 50 taper adapter using retainer key to retain special 50 taper stuff

View attachment 297264

John, That 50 taper adapter is pretty slick. I guess there's no easy way to get this thing tooled up other than to keep an eye peeled on ebay and perhaps auction sites. I may have to resort to having the retaining slot cut via into some standard MT5 tooling as Bill suggested.

svs · Aug 21, 2020

Those special 50’s could be duplicated functionally with slotted pull studs in CAT arbors, but still not my ideal of quick change perfection.

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johnoder · Aug 23, 2020

You must of been thinking out loud - though I just read your post now.

What is pull stud thread in Cat 50?

svs said:
Those special 50’s could be duplicated functionally with slotted pull studs in CAT arbors, but still not my ideal of quick change perfection.

Sent from my iPhone using Tapatalk

gbent · Aug 23, 2020

Same as 50 NMTB, same drawbar works, just needs a spacer for the NMTB.

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