Problem with Making Drill Press Auxiliary Table

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Forum topic by ChrisCarr posted 11-22-2010 05:40 AM 1280 views 0 times favorited 5 replies Add to Favorites Watch
View ChrisCarr's profile


196 posts in 2317 days

11-22-2010 05:40 AM

Hello All, I have run into a bit of a problem when trying to make a wooden aux. table for my drill press. I thought someone might have an answer. My press’ current table is about 1/3 the size of the plywood one to go over it. Its just 1/2” thick plywood with solid spruce rabbetted around the edges and 2 spruce support glued under the ply. The new table is dead flat as i checked before i put it on the cast iron one but once its clamped onto the cast iron one it is not flat anymore. It isn’t flat in the areas where the cast iron isn’t under it. It appears to bend when clamped.

Would making a thicker table fix this? Could I fix this without redoing the table?

Thank you.
- Chris C.

5 replies so far

View wseand's profile


2754 posts in 2460 days

#1 posted 11-22-2010 05:56 AM

I am not sure why it would bend when you clamp it down uless the clamps are pulling it at a odd angle. If you could upload a few pics that might help to get a better idea of your problem. Sorry I am a visual person. You might try more supprt closer to where it sits on the table. Or try finding a different way to fasten it down besides clamps.

-- Bill - "Freedom flies in your heart like an Eagle" Audie Murphy

View PurpLev's profile


8523 posts in 3067 days

#2 posted 11-22-2010 06:02 AM

depending on where the 2 spruce support are – they may not provide the proper support needed.are they going cross? or length wise? does the plywood bolt directly to the cast iron table? or are the support between the plywood and the cast iron? (the plywood should be bolted directly as any gap between them will cause the plywood to bend is too much pressure is put on the bolts)

that aside – 1/2” sounds a bit on the light side of things. you would be far better off with simply using 2 3/4” or at least 2 1/2” plywood panels laminated together and you won’t need any additional support braces.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View Robsshop's profile


899 posts in 2393 days

#3 posted 11-22-2010 06:17 AM

Chris,pics would help to diagnose but with Your description it seems if your table is flexing under clamp pressure !Perhaps it is from over tightening of the clamps,once again its hard without a visual . For most drilling operations on a drill table it is not necessary to apply so much clamping force, I use two set screws at the base of drills plate to hold my auxilery table in place .

-- Rob,Gaithersburg,MD,One mans trash is another mans wood shop treasure ! ;-)

View Howie's profile


2656 posts in 2341 days

#4 posted 11-22-2010 02:32 PM

Glue a piece of 3/4 MDF on top.(or bottom)

-- Life is good.

View Gregn's profile


1642 posts in 2402 days

#5 posted 11-22-2010 09:06 PM

I made a down and dirty one from 3/4” plywood with a oak fence and bolted it directly to the cast iron table with 2 carriage bolts and have had no problems with flatness. As stated pics would be a big help, to give advice on.

-- I don't make mistakes, I have great learning lessons, Greg

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