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DIY Riser Block for 6" x 26" Import Mills (Grizzly, Enco, Harbor Freight, etc.)

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mrplasma

Aluminum
Joined
Sep 25, 2020
DIY Riser Block for 6" x 26" Import Mills (Grizzly, Enco, Harbor Freight, etc.)

A lack of distance between the spindle and table appears to be a universal issue for owners of these popular import mills. I think I may have come up with a relatively easy to fabricate riser block to fix the problem.

McMaster-Carr carries a 6" dia. pipe flange (Pt.#68905K389) that is almost made to order for this riser block project. They are 6" in diameter, 3/4" thick, with a 3.10" x 1/4" flange on one side. They come with four 3/4" bolt holes, two of which will be used for dowel pins for alignment purposes. A third will be used for one of the hold-down bolts. Two 1/2" diameter holes will be drilled in each plate for the other two hold down bolts. Additional detail is included in the second image below.

They cost approximately $26.00 each, and with slight modification, will stack pancake style to whatever height you desire. The machine work necessary is:

Drill two 1/2" holes in each plate
Mill or face the flange off all but one plate
Bore the existing center hole in one plate to 3.10"
Cut to length two 3/4" dowel pins (drill rod or CR round)

I'm waiting for warm day to install it. There may be some minor dimension differences in these mills depending on name brand. It's a good idea to check dimensions on yours before going too far.

Enco 6x26 mill.jpg DIY riser block.jpg Drawing.jpg
 
I’m thinking that many plates would result in a serious loss of rigidity.

Is there any solid chunk you can find?


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If rigidity ends up being a problem (who knows), add a third dowel pin to the empty 3/4" hole and/or weld the plates together in several places around the circumference.
 
That's a shitload more money and work than just buying a piece of 6" whatever grade steel bar.

It's not a hobby site.
 
A lack of distance between the spindle and table appears to be a universal issue for owners of these popular import mills. I think I may have come up with a relatively easy to fabricate riser block to fix the problem.

McMaster-Carr carries a 6" dia. pipe flange (Pt.#68905K389) that is almost made to order for this riser block project. They are 6" in diameter, 3/4" thick, with a 3.10" x 1/4" flange on one side. They come with four 3/4" bolt holes, two of which will be used for dowel pins for alignment purposes. A third will be used for one of the hold-down bolts. Two 1/2" diameter holes will be drilled in each plate for the other two hold down bolts. Additional detail is included in the second image below.

They cost approximately $26.00 each, and with slight modification, will stack pancake style to whatever height you desire. The machine work necessary is:

Drill two 1/2" holes in each plate
Mill or face the flange off all but one plate
Bore the existing center hole in one plate to 3.10"
Cut to length two 3/4" dowel pins (drill rod or CR round)

I'm waiting for warm day to install it. There may be some minor dimension differences in these mills depending on name brand. It's a good idea to check dimensions on yours before going too far.

View attachment 312166 View attachment 312167 View attachment 312168

So, lets take a flexy POS mill shaped object and make it flex even more. Brilliant.
 
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