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Re: Tool Post Grinder
Forgot to mention that it's a 1/3hp 115VAC/DC universal motor, so it should be speed controllable, too. Supposed to have a 3-wire grounded plug, but not anymore. Will have to fix that. Looks like
By Bill in OKC too · #115862 ·
Re: Tool Post Grinder
Got it a bit ago, did some measurements with my HF 12" digital caliper, numbers aren't exactly right, but based on sizes and fairly close dimensions, it's a J-3, spindle says 35000rpm, designed for
By Bill in OKC too · #115861 ·
Re: Tool Post Grinder
I found their website Sunday, and downloaded a number of their parts lists with diagrams. Is where I found out the sizes of the spindle nuts. Also one that shows the dimensions of the various
By Bill in OKC too · #115860 ·
Re: Tool Post Grinder
Themac LLC 117 Patterson St Hillsdale, NJ 07642 (201) 438-2313 info@... Parts are still available. I have a J45.
By Tom S · #115859 ·
Re: Tool Post Grinder
I don't know what version it is now, but I'm hoping, based on apparent sizes of the spindle nuts and such that it's one of their smaller, J-2 or J-3 machines. Those are sized for 9-12" lathes. It
By Bill in OKC too · #115858 ·
Re: Graham Mfg Co Double Knurling tool
Just watched both videos Dennis; spot on thanks. wrote:
By Bryan · #115857 ·
Re: Tool Post Grinder
On 7/23/23 15:13, Bill in OKC too via groups.io wrote: I got a TheMac J4 tool post grinder many years ago.? I put it on a 12" Craftsman, and it was really a bit too large for that lathe.? Now, I
By Jon Elson · #115856 ·
Re: Graham Mfg Co Double Knurling tool
See Mr Pete222 you tube channel. I believe that that is his favorite style of knurling tool Dennis via Moto Z3 716-720-0940
By Dennis LaMonica · #115855 ·
Re: Tool Post Grinder
What I get is in the first two photos I posted. I will be needing all but 2 pullieys,? belt guards, and internal grinding adapters, plus some grinding wheels. Some put a 6" grinding wheel on it, and
By Bill in OKC too · #115854 ·
Re: Graham Mfg Co Double Knurling tool
Steven: thanks for the information and especially the suggestions. I'm very new to this so the specific ideas to make it work are very helpful. Bryan
By Bryan · #115853 ·
Re: Tool Post Grinder
hi bill i have a lot of spare parts for the themac grinders let me know what you need off hand you need a few different pullies to adjust the speed for different size wheels also you need the mount to
By fred eisner · #115852 ·
Re: Graham Mfg Co Double Knurling tool
This knurling tool was used in screw machines and turret lathes. This could be used on your lathe if desired. A collet chuck arbor in the tailstock would work. A boring holder in a quick change tool
By Steven Nederhiser · #115851 ·
Re: Tool Post Grinder
Low end, the spindle nuts are 3/8"-24tpi left or right hand thread, high end 3/4"-24tpi for a J-7 Themac. I'm guessing they're 3/8" nuts, and the screws that hold the spindle on are 5/16"-18, which
By Bill in OKC too · #115850 ·
Re: Tool Post Grinder
It's kinda hard to get any scale from the pics , but that motor looks to be 1/2 the size of the motor on my Atlas TPG? . If that's so that's a real nice feature . animal
By mike allen · #115849 ·
Re: Graham Mfg Co Double Knurling tool
Thanks all. Turret lathe tool makes sense now that you all have pointed it out.
By Bryan · #115848 ·
Re: Tool Post Grinder
Plan on it, later in the day. ;) Or may wait until I actually get it, take some measurements, and then I'll have a lot more info to work from to identify which one I have. They have a couple of models
By Bill in OKC too · #115847 ·
Re: Tool Post Grinder
Has T-nut setup. Will need some work to get it the correct size of T-nut, of course. I'll have to see what size fastener they used, and make a T-nut to fit that, as the T-nut on my machine matches the
By Bill in OKC too · #115846 ·
Re: Tool Post Grinder
??? ??? I'd do some askin over here https://www.practicalmachinist.com/forum/ ??? animal
By mike allen · #115845 ·
Re: Graham Mfg Co Double Knurling tool
??? ??? MY bad , I didn't see the" turret " in Bill's reply , so in that case I second what Bill said . animal
By mike allen · #115844 ·
Re: Graham Mfg Co Double Knurling tool
??? ??? Maybe for use in a turret lathe . animal
By mike allen · #115843 ·