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3/4" vs 20mm

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Forum topic by JimNEB posted 08-25-2013 02:33 PM 1416 views 0 times favorited 14 replies Add to Favorites Watch
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JimNEB

239 posts in 1792 days


08-25-2013 02:33 PM

Topic tags/keywords: shop upgrades question mft

I’m looking at building a new work table and trying to decide on weather to go with 3/4” holes on a 4” grid or the 20mm holes on a 96mm grid. Any thoughts, pros and cons would be welcome.
Thanks

-- Jim, Nebraska


14 replies so far

View MT_Stringer's profile

MT_Stringer

2071 posts in 1955 days


#1 posted 08-25-2013 02:50 PM

Jim, have you seen the Ron Paulk workbench video?

-- Handcrafted by Mike Henderson - Channelview, Texas

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JimNEB

239 posts in 1792 days


#2 posted 08-25-2013 07:19 PM

MT-That was what got me thinking about putting a grid on it. I’m just not sure weather to go 20mm or 3/4”. I don’t know if it will even make a difference.

-- Jim, Nebraska

View Loco's profile

Loco

210 posts in 474 days


#3 posted 08-25-2013 07:37 PM

You going to use wood dowels as pegs or aluminum ( the correct way) ?
I’d use a 13/16 spade bit( take a belt sander to a 7/8 bit if you want it tighter) and buy 20 MM aluminum rounds.
Here. I’ll save you some time ;-)~
http://www.orangealuminum.com/round-rods.html

-- What day is it ? No matter. Ummmm What month is it ? No moron. I paid for a 2 x 6. That means Two inches by six inches. I want the rest of my wood.

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MT_Stringer

2071 posts in 1955 days


#4 posted 08-25-2013 08:07 PM

@Jim – How thick will your table be?

My table is 2 inches thick and has some 3/4 inch holes drilled in it. The Festool style clamps will not fit through the holes because of the thickness.

The work area of my miter saw station has 3/4 inch holes drilled in it. The clamps work just fine. The clamps I am using are the ones that are part of the track saw package from Grizzly so they are doing double duty for me. :-)

-- Handcrafted by Mike Henderson - Channelview, Texas

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Loren

7809 posts in 2372 days


#5 posted 08-25-2013 08:16 PM

I built a fixture table for bending. I used 7/8” holes on 4”
centers. 1/2” pipe will fit in 7/8” holes. I welded washer
flanges onto short lengths of pipe. A 1/2” bolt can be put
though to clamp the pipe down if needed.

-- http://lawoodworking.com

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JimNEB

239 posts in 1792 days


#6 posted 09-09-2013 07:42 PM

Good ideas…
I ‘m thinking of laminating a piece of 3/4” mdf and 1/2 mdf for the cabinet top with about a 4” area underneath that I can use as a downdraft table also.
I’ve been looking at some of the products from qwas corp to use with my table…

-- Jim, Nebraska

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MT_Stringer

2071 posts in 1955 days


#7 posted 09-09-2013 07:55 PM

“I ‘m thinking of laminating a piece of 3/4” mdf and 1/2 mdf for the cabinet top with about a 4” area underneath that I can use as a downdraft table also.”

Jim, i am not sure if the Festool style clamps will work on a table thicker than 3/4 inch.

-- Handcrafted by Mike Henderson - Channelview, Texas

View Dutchy's profile

Dutchy

581 posts in 893 days


#8 posted 09-09-2013 08:02 PM

Why don,t you do both. To me it likes possible.

-- My englisch is bad but how is your dutch?

View JimNEB's profile

JimNEB

239 posts in 1792 days


#9 posted 09-09-2013 08:07 PM

Thanks Mike, I didn’t know that. Gives me something to consider.

-- Jim, Nebraska

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JimNEB

239 posts in 1792 days


#10 posted 09-09-2013 08:10 PM

Dutchy, my Dutch is non-existant. I do know a smattering of German though.

I hadn’t thought of doing both, nice idea. I’ll look into how that might work.
Thanks

-- Jim, Nebraska

View gtbuzz's profile

gtbuzz

378 posts in 1166 days


#11 posted 09-09-2013 08:17 PM

I’m kind of in the same boat as you. Looking at building a table that’s compatible with the 20mm MFT dogs that I’ve got, but I don’t really want to go all 20mm since it’s harder to find stateside and can be quite expensive compared to the 3/4” stuff.

The idea that I’m leaning towards right now is alternating rows of 3/4” and 20mm holes. The grid will be based on imperial units rather than metric though. I figure it would be really wonky to have rows where the centerline doesn’t quite line up.

View MT_Stringer's profile

MT_Stringer

2071 posts in 1955 days


#12 posted 09-09-2013 11:15 PM

I would like to see pics of what y’all come up with. Since my table is almost 2 inches thick, I drilled out the useless 3/4” holes with a 7/8 inch bit. I haven’t had the need to use them yet but could change shortly. I have some 1/2 inch Bessey pipe clamps. The 1/2 inch pipe will fit through the hole. Also, I have several of th drill press vie grip type clamps. Ace hardware had some 12mm threaded rod so I bought a couple couplers and the rod. Now I can set the clamps up in any of the holes for assembly jobs.

Another option is to cut the knob off the end of f style bar clamps and insert part of it up through the table from the bottom and mount the clamp handle on it.

My miter saw station has the 3/4 inch holes and the clamps really work well. Need to use the pocket hole jig. No problem, just clamp it in place and git after it!

-- Handcrafted by Mike Henderson - Channelview, Texas

View Dutchy's profile

Dutchy

581 posts in 893 days


#13 posted 09-15-2013 09:16 AM

Gutentag Jim,

I don,t know if you are still thinking, but maybe you are happy with this drawing:

Please let me know If you like a auto CAD drawing.

Succes

-- My englisch is bad but how is your dutch?

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JimNEB

239 posts in 1792 days


#14 posted 09-15-2013 02:05 PM

Dutchy,
I like that thanks!

-- Jim, Nebraska

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