i will offer up 3 of my solutions
i have no use for the rocker ....... w/out the rocker , & the tool holder on a flat surface ,the ridgidity is near that of a quick change ( for a light lathe )
ihave done this 3 ways
...the latest , a barnes 9 in lathe , i nstead of the rocker /crved washe , i used two piecess the top piece screwing into the lower one ..these are THICK washer shaped & they adjust the tool ht by screwing the top one ore or less into the lower one ...both are knurled for handling
on my 12x36 cfrtsmn commerciela i use 1-1/2 & 2 in square turrets , circa 2 in high, w/ angled slots on the 4 sides ...this gives some adjustment as the bit wears w/ out needing shims......of course you can use a horizontal slot & then shim to ht....i also sawed some squares into triangles w/ individual slots on one or two sides for bits , so that i can get into tighter areas, & these are necessary ,,,,,,.other blocks hold knurler , & cut off blades ..for heavy parting off i use an armstrong FLEXBLE goose neck holder which near eliminates chatter & jam ups , by flexing away from teh cut ......i prefer these solid side slot holders to the q /change i succunbed to in a moment of weakness ( & sale price)
on my monarch A 14 in.., i used several one in thick washers ....i opened these up to slide over the post & thinned two of them to different thicknesses.......these two PLUS the armstrong type bit holders which angle the bits upward on a slant , provide suffiocient abjustment to center the tool bit & keep it there by sliding out after regrinding ....by eliminating the rocker, & having the tool holder on a SOLID FLAT WIDE THICKwasher , i have actually taken a two inch bar down to one in bar in a single pass , just to see what cud be done...
.i added a riser to the AXA quick change to use it on the monarch , but truthfully , rarely use it ....the thick washers work well w/ the tool holders angled bit hole ...& once these are set , the bit is alwways centered...
i get the feeling & maybe wrongly so ,from your statement that you ordered tool steel rather than square lathe bits, that you are using solid tools rather than tool holders & bits ...i f so , the adjustment provided by the angled bit hole on the holders is lost
best wishes ,
From: lustsoul_2000 <godlessdavis0@...>
To: atlas_craftsman <firstname.lastname@example.org>
Sent: Thu, Apr 4, 2013 5:41 pm
Subject: [atlas_craftsman] Re: Rocker style tool post for 12 inch Atlas?
It's the post itself that is small. The South Bend tool post I have will hold a 1/2 inch tool, but there is no way it's gonna fit in this lathe.Even The tool post I have for the 6 inch is a bit too big. It holds up to 1/2 tool holders, and is about 3/4 inch in diameter. The slot opening in the 12 inch lathe is only 5/8" I can slide both of the tool posts I use for the 6 inch lathe into the slot, but only just barely, and it has to go in flat with the cut out slot. You can't rotate the tool holder once it's slid in. This means that I could use the those tool holders, but I would have to adjust tool angle with the compound rather than just nudging the tool post around a bit.
I suppose I could widen the opening a bit, but the t slot already seems a bit weak, and too small to me. removing metal there isn't going to make it stronger.
I'll probably just sell the SB tool post and make a new base for the one I use on the 6 inch lathe.
It just seems like the t slot should be bigger on the 12 inch lathe.
Also, do you know if you can buy just the curved washer and rocker? both pieces on mine are cracked. I've been using them like that for years, and probably should have made new ones by now. I'd replace them if I could just get new ones.
--- In email@example.com, Doc <n8as1@...> wrote:
> if the south bend is an xtra , just fit the base to your lathe (.OR if needed , make an xtra base)..if no mill nor shaper ,, you can face it thinner & also narrower in your 4 jaw chuck ,(do bothe edges)OR you can hack saw/ band saw & file.
> the 6 in may be thicker cause it is narrower ??/ if you have a quick change , just grind your thrd bit to fit one of the turning tool holders ?????.....for me , there are times that i want the lantern tool post , but others have said ,they find no need ??????
> best wishes
> -----Original Message-----
> From: lustsoul_2000 <godlessdavis0@...>
> To: atlas_craftsman <firstname.lastname@example.org>
> Sent: Wed, Apr 3, 2013 2:03 pm
> Subject: [atlas_craftsman] Rocker style tool post for 12 inch Atlas?
> I've been using a quick change tool post set, but need to thread something. I have a real nice threading tool (and no extra HS bits to shape into a threading tool) so I started measuring for a rocker style tool post.
> Is it just me, or is the t slot in this lathe really small? I have a southbend tool post that won't fit, and the tool post on my 6 inch Atlas has a larger t slot base than the 12.
> What can I look for that will fit this lathe? Does it have to be an Atlas part, or are there options.
> I ordered some tool stock to cut into threading tools, but now I'm just curious about it.