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View Full Version : Now why didn't I think of that!



Spin Doctor
01-24-2009, 11:49 PM
Got the Feb/March issue of Machinists Workshop today and saw the Vertical/Horizontal Milling Support. One idea that just never occured to me.

J Tiers
01-25-2009, 12:23 AM
Sheesh..... I JUST got my copy of the JANUARY magazine..... and here you have a Feb-March.........

Doc Nickel
01-25-2009, 12:28 AM
So what's the idea? Got a pic for those of us that don't have a copy?

Doc.

Spin Doctor
01-25-2009, 12:33 AM
I'd post a picture but, copyrights and all. Basically a support like the ones that mount on the ram of a BP but placed on the dovetail for the knee. Could very easy be made for a dovetail mill where it could also be used to provide a center hole to tram the head to

http://www.use-enco.com/CGI/INPDFF?PMPAGE=493&PARTPG=INLMK3&PMITEM=209-1004

Hey, I usually get my copy late so I assumed...................................

John Stevenson
01-25-2009, 05:54 AM
You mean one of these ?

http://www.stevenson-engineers.co.uk/files/vertical%20support.jpg

No copyright, no idea how old this is but the pic was last edited in 2001.

.

Peter.
01-25-2009, 06:03 AM
Wow that's a good idea. Easy to make too just tram in your head and use it to bore the hole in the support - perfect alignment :)

Circlip
01-25-2009, 06:14 AM
Hm, not quite SO easy Peter, Left to Right AND Front to Back on head.

Regards Ian.

Peter.
01-25-2009, 06:24 AM
Aah yes. Easy for me though as my head only rotates in the left-right plane unfortunately. I have some horizontal cutters but never had the means to use them - until now.

Doc Nickel
01-25-2009, 07:23 AM
I have some horizontal cutters but never had the means to use them - until now.

-What? R8 stub arbors (http://cgi.ebay.com/R8-STUB-MILLING-MACHINE-ARBOR-1-DIAMETER_W0QQitemZ120366211232QQcmdZViewItemQQptZB I_Tool_Work_Holding?hash=item120366211232&_trksid=p3286.c0.m14&_trkparms=72%3A1419%7C66%3A2%7C65%3A12%7C39%3A1%7C 240%3A1318%7C301%3A1%7C293%3A1%7C294%3A50) have been common and inexpensive for years. Similar arbors are available in most of the other mill tapers as well. I used a couple of small horizontal cutters for years before I actually got a horizontal.

And I confess, while that idea- at least as John showed- is indeed clever, I have a hard time seeing the need for it. As in, how much more stable would that be, compared to a simple short stub arbor?

Especially on something like that small gear cutter shown- if the arbor were only an inch or two long, would it really be all that less stiff than the extended one with the bracket?

Doc.

Circlip
01-25-2009, 07:32 AM
Sorry Peter I forgot about the axis that Doc has just pointed to. The QUILL also has to be square sothe bracket also minimises the axial movement of the head, as in a vertically mounted horizontal miller overarm support. :confused:

Regards Ian.

Peter.
01-25-2009, 07:35 AM
Oh, only because I just last week bought an upright mill (which uses proprietory collets so no stub-arbor for me). I guess I could drive an arbor with a support from my 1/2" collet though. I've had a handful of cutters I got with a bundle of other bits some time back.

John Stevenson
01-25-2009, 07:48 AM
Any support is better than nothing.
Whether you think it worth it is up to you, this shot, which isn't mine BTW, I can't credit is as I don't know who's it is, shows a small gear cutter but it could be any type of cutter.

That cutter is also mounted on a long arbor which sometime you have to do to get clearance, on an arbor that long vibration is a serious issue. If you were running a 6" slitting saw you would finish up wearing it.

Would I build one? no because I have a horizontal and how many shots do you see of horizontals running with out the over arm support? What's to stop an horizontal just using a stub arbor? None it's just better to support it.

.

Peter.
01-25-2009, 07:53 AM
Could have the best of both worlds and make an extended-shaft driven off a stub-arbor and used with the dovetail support.

Spin Doctor
01-25-2009, 09:14 AM
John, I think where some thing like this would pay for the most part is on the RF-45 and clones

John Stevenson
01-25-2009, 09:19 AM
John, I think where some thing like this would pay for the most part is on the RF-45 and clones

Or my Bridgeport mill / drill ? :rolleyes:

.

Mcgyver
01-25-2009, 09:57 AM
I like that idea, not sure if i like enough to make one or if i agree with Doc. then again any heavy cutter extended on an R8 is going to be a lot tougher on the bearings than a double shear set up and I can see instances where you'd have to extend the quill to reach with a cutter further leveraging the force on the bearings.

I finally be able to use that 8" long slab cutter :D

Teenage_Machinist
01-25-2009, 01:26 PM
That makes me want to make a bed mill version.