Originally posted by len dowe
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Anyways, three tips:
1) Turn your compound 90 degrees to the bed and mount your post SQUARELY to the compound -- not at an angle as you have it in the photos. If you run the compound this way, you can EASILY take full 1/8 DOC cuts with HSS tools. If you try to use ceramic -- up your speed considerably and lower the feed rate. Otherwise, it's standard speed and feed. I turn a large amount of 4140 (annealed and PH) -- as well as 17-4 stainless; 1040; and T6 alloy. All love the baby atlas . . . but you've got to have it rigidly mounted and the bed nice and level.
2) Loosen your belt! You've got it taunt with the eccentric at the loose setting. You'll tear up your pulley and distort the jack shaft faster than you think.
3) Shim the motor coupler so it's not "hanging" as in the photos. It will bounce in use -- resulting in chatter. These are already very light lathes (very) and you want to eliminate sources of unwanted vibration as much as possible. I use blocks of semi-rigid carpet foam to help isolate the motor vibration.
Other wise, they are fun manual lathes. I can hold a solid .001 taper over 12" which really isn't bad for a 73 year old very light duty hobby lathe. The only draw back is that it takes me about 8 times longer to make parts on it than with a EE or Hardinge tool room (especially if cutting threads!).
Finally, the one thing you CAN do these lathes with impunity is tool post grinding. There's a dude in Niles, MI who sells a good kit for these lathes at circa $400 complete. Don't bother hunting the original Atlas TP grinder -- it's a huge heavy beast. With a more modern, lighter grinder you might be amazed at what you can do.
Oh, and I make my own brake shoe rivet set tools -- all 1040. I have different ones for the different shoes I work with -- but the header is the same across the board as I usually use 4/4 brass -- though sometimes I get real lazy and use copper/al pop rivets (Copper bodies; aluminum shanks). I still "set" the pops anyways just to make sure the rivet has drawn the lining tight enough to the shoe
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