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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
 

AndySomogyi

Plastic
Joined
Sep 2, 2018
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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mrplasma

Aluminum
Joined
Sep 25, 2020
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.
 

Garwood

Diamond
Joined
Oct 10, 2009
Location
Oregon
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.
 
Joined
Nov 19, 2007
Location
marysville ohio
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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