Myford Taper Turning Atahment AGIAN

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Rob.Wilson:
Hi outlawspeeder

--- Quote ---I have seen a lot of plans with a dead man bar. Rob, your design works for only that part of the lathe, the first 12-18 inches? Step in and tell me if my thoughts are wrong. Is a dead man design really needed? I don’t do a lot of work out that far to the right and normal I can flip the work… Thoughts? Looking for input is it needed?

The back side of my lathe is rough cast. Not a flat mount. What do I do? Put the lathe on the mill??? The bed weights more then I want to lift. Mount the plate, true it (grind as needed) and leave it there? Do four mount studs with standoff plates…

--- End quote ---

The Myford lathe has a flat section machined the length of the bed with a series of tapped holes so attachments can be added anywhere along its length , so the TTA can be positioned just about anywhere.

The "dead man bar" , i take it your talking about the type of TTA that fits too say a Southbend/Boxford Lathe ,were the complete TTA moves with the saddle of the lathe and the bar is locked to the lathe bed . This design overcomes the need for a flat on the rear of the lathe to mount the TTA and also easier positioning .

So in your case it would be a more suited design for your lathe, If your were to go for the Myford design of TTA , you could as you say ,spot face /drill tap fixings for studs , by means of an L shaped drill guide mounted to the rear of the lathe cross slide and extending downwards , that way all your stud holes will be parallel to the lathe ways . (can do sketch if you dont get my drift)

--- Quote ---When you are not using your TTA, do you just leave it loose, remove upper parts, remove all of it and “return it to the museum” for display?
--- End quote ---

:lol: :lol: leave it on the lathe to get covered in swarf

--- Quote ---On Rob’s Slider:
He hardened it, the wedge, missing from all photos and text, does it get hardened? I can see were you may have blued it in one shot. Is it BSM, or something soft?

--- End quote ---

Yes it was hardened too ,,,,,,,,, I hardened the slider parts as they and the guide bar are all BMS , hardening one set of parts means there will be no metal pick up as the the two parts slide together, I could /should have used cast iron .

Hope that helps

Rob

outlawspeeder:
I understand the "L” guide to drill the holes. With you opening my mind to move the rig :Doh: , now I am thinking two rows of studs, a mounted plate , the full length of the lathe, with mount points on it. Kind of make my own machined flat. If I add a lip for the rig to slide on I don’t have to lift it. Just slide it to the location, screw it down and set it up and cut. Time for the crayon and the napkin again.

What are you using for gas to heat the BSM? I saw the fire brick, a bit of a blue flame. Again looking for what works. I don’t mind trying new things but the wheel is not getting replaced until one of us fabricate an anti friction device.

All this just to beable to cut a taper? Love this hobby.

Rob.Wilson:
Your idea to add a steel plate would give you allot more verticality :med: , I just used Propane to do the heating nothing special .

Rob

outlawspeeder:
The bluing worked well, came out really dark on the first swing. The 2nd shot came out nice. Sorry no picks. I did not leave it in as long and got the nice coloring. Lots of smoke. Hahaha and no warning. Yes, I knew it would smoke but next time I’ll do it with the shop door open.

The rail is almost out of the crayon and napkin stage. Looking at a 1/2 by 3 inch hot rolled bar. Offset mounts will be 1x2x3. That will give me room to shave off as needed to true it up to the bed. I will add bosses on the mount points for the taper attachment to give it some to lock on.

I am really sweating the drilling of the lathe and cross slide. The Grizzly I have has the removable bed, never removed, so mounting on the head side gets tricky. For the cross slide, I want to cut a “T” slot like yours but not sure if this would be a good thing to do. Really like the two pin, one “T” bolt you picked. I have to put the slide of and take a good look.

If anyone has cut into a grizzly lathe please let me know how it went. Looking for the good bad and the ugly of the drilling into the casting.

outlawspeeder:
"the cold rolling prosses there is allot of stress built up in the bar, and if you machine more off one side than the other you remove... ", Rob. It will turn in to a rocking chair leg. I got it, and didn't know why until I read this.

If I used hot rolled will I have the same problem? It cheaper and if I don't have to "cook it" It will save time and money.

I don't know so I ask, how else am I to learn.

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