MT#2 opinions sought for Atlas Mill (application applies to general machining)

[rdhem2]

Think Lads. Most of all MT applications I can think of use pressure applied longitudinally to the tool to keep it tight in the socket. Other methods are used for side pressure applications. I am not familiar with that machine in the slightest. Is there no way to utilize a draw bar? Paper idea is kind of cleaver though!

 

[Tony Wells]

Quite correct. But OP stated that he will be using a drawbar, so the side pressure concern is covered. I'd never use a MT without a drawbar for anything that exerted side pressure.

 

[Dave Smith]

Uncle Buck--I have two solutions for you that would work perfectly---#1 is to find a threaded bushing(1"x10tpi I think). O.D. approx 1 7/8 to 2" x 1" long to screw on your spindle threads. next remove 3/16" of the leading threads, face front so it will be 1" ID by 1 3'8 OD . the od just needs to be cut back 1/8" so it will screw on the spindle and surface up to the spindle face, then face rear and drill two holes 5/8" deep for 1/4" press fit dowell pins. 1" long by 1/4" hardened dowell pins should pressed in and 3/8" will remain out for your arbor cutter drive slots. next drill a 1/4" hole in the side for a spanner wrench to loosen and tighten it from your spindle.----#2 method is just let me know when you want to borrow mine and I can send it to you. I just took mine off after reading your request and I have no immeadiate plans for using it. you could sure borrow it ---Dave

 

[wa5cab]

Uncle Buck (and Dave),

I think you are talking about the M1-570 Shell End Mill Driver. Which fits the M1-585 Shell End Mill. I would recommend that you find or make one, or borrow Dave's.

Robert D.

 

[NITROTRIP]

Uncle Buck, I am going off 4yr old memory here so excuse me if I get something wrong. I also have one of these mills and the 4yr memory part comes from loaning it to my brother up in Minneasota to use. I have had it for about 16 or 17 yrs, but not used it much. I got it from a good friend who's father bought it new in the 50's and passed away 25yrs ago. It has a lot of tooling, original and what he made. Now the memory part. There is a coller that I think threads onto the front of the horizontal spindle like a lathe chuck with 2-1/4" pins faceing the table. All the larger morse taper end mill holders and what looks like a shell mill arbor have a shoulder with 2 slots milled in them to engage those 2 pins then you use the draw bar to snug it up. That coller just threads on the spindle with a small spanner wrench then you just insert whatever holder you want to use. All the holders 3/8 and up are set up like this. The mill is comeing home in the next month or 2 and the plan is to finely explore what this tough little guy can do. I hope this might help as that coller would be easy to make. The mateing holders might take a little thinking but hay, we sometimes forget. WE are machinists after all ) and a machinist made it to start with :thinking:. Both my brother and I are machinists for over 30yrs. Him full time and me as a supplement to my other trades. We both constantly have to remined each other of that when we can't find something we need. ":*****slap2:Never will figure out why "MA" alway's liked you best, a machinist would just whip one out" We have more fun with that, then after a good laugh we start bounceing around ideas to make it work. I think this is the same setup that Dave Smith was explaining in his exellent post. That got me thinking about what my mill has in it's tooling box that I haven't used yet. Take Care, Rick