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Emco V13 Taper attachment build

Darren

Ultra Member
Premium Member
Its 1018. Its typical for cold rolled to do that when machining. You deal with it similar to dealing with welding warpage/shrinkage. It will be fine for what it is. If i could have found a cast iron bar the correct size for less than a first born, i would have used that for sure. Hot rolled is usually pretty good as far as stress goes too. I didn't have the right size in stock and just wanted to keep moving on this project. The next one will be all cast iron.
 

Darren

Ultra Member
Premium Member
Some recent progress pics

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Tee slots.

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Yup, I screwed up. Forgot to move over the radius of the 5/16" endmill on the second one. Dammit

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Since I didn't radius cut the tee slots in the lower bar, I oblonged the slots in the upper bar. I don't think my 6" rotary table would have liked a radius cut of 6.9". New 12" Yuasa rotary table is still a week away.

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Pivot pin is a hardened 0.500" dowel pin. Drilled and reamed the lower bar for a half thou press, 0.000 fit into the upper bar.

Going to grind everything to size and make the guide shoe and linkage, and a tool holder and it'll be done.
 

Darren

Ultra Member
Premium Member
Bit more work today

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Making the slider block. Started off by slicing up some cast iron from a tractor weight.

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roughing out the bearing pockets.

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I set the bearings about 5 thou tight on the bar and surface ground the bar to fit. The bar was ground with a paper shim to tilt it So the top of the bar is 3 thou wider than the bottom. This keeps the block seated on the bar all the time. It slides really nicely

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I lubed it up to see the "in use" friction

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More to come....
 

PeterT

Ultra Member
Premium Member
Are the bearing rotating on shoulder bolts or something like that? When you say you set them, how do you adjust the in/out play?
 

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Darren

Ultra Member
Premium Member
They are not adjustable. I adjusted the fit by purposely making them too tight then surface grinding the bar till it was a nice fit with no play. I think it will be fine. If not, i can make another, or add cams or something.

I was going to use a linear rail and bearing block, but all the ones i have are matched pairs. Doing it over I might use linear rails and bearing blocks for both upper and lower bars, with a 1/2"x 3" plate sandwiched between, instead of cutting that long dovetail, but what fun would that be?
 

Husky 511

Brand New Member
They are not adjustable. I adjusted the fit by purposely making them too tight then surface grinding the bar till it was a nice fit with no play. I think it will be fine. If not, i can make another, or add cams or something.

I was going to use a linear rail and bearing block, but all the ones i have are matched pairs. Doing it over I might use linear rails and bearing blocks for both upper and lower bars, with a 1/2"x 3" plate sandwiched between, instead of cutting that long dovetail, but what fun would that be?
Hello from Slovenija. Mising some parts for Tapper attachement for my emco 13. S looking for part numm. for that attachement. Somebody has it, since I can not find it in here. Regardes
 
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