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Holdfast in MDF

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Forum topic by paridgerunner posted 10-27-2020 12:25 AM 407 views 0 times favorited 4 replies Add to Favorites Watch
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paridgerunner

54 posts in 697 days


10-27-2020 12:25 AM

Anyone use holdfasts in a MDF bench top?

My bench top is 3” of MDF with 3/4 dog holes.
The hole edges are eased with a 1/8” round over.
The edges and first inch or so of the holes are soaked with thin CA glue.

Curious if anyone has experience with MDF holding up, or not, using holdfasts.

Thanks,
Jay


4 replies so far

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Madmark2

1819 posts in 1505 days


#1 posted 10-27-2020 01:01 PM

The silence is telling.

-- The hump with the stump and the pump!

View RightBrained's profile

RightBrained

5 posts in 1040 days


#2 posted 10-28-2020 11:10 AM

I drilled dog holes into my 1.5” thick MDF outfeed table and my gramercy holdfasts work perfectly fine with it. I can’t tell a difference between the MDF and my southern yellow pine workbench.

View Bill_Steele's profile

Bill_Steele

733 posts in 2648 days


#3 posted 10-28-2020 03:17 PM

My workbench top is also 3” thick MDF and I have dog holes—they are holding up fine—at least 10 years so far. When you say “holdfast” are you talking about the type that you tap down with a mallet onto the stock? I’ve just been using dogs as stops and then use either my face vice or I have the Veritas wonder dog to apply clamping force.

View paridgerunner's profile

paridgerunner

54 posts in 697 days


#4 posted 10-28-2020 04:35 PM



My workbench top is also 3” thick MDF and I have dog holes—they are holding up fine—at least 10 years so far. When you say “holdfast” are you talking about the type that you tap down with a mallet onto the stock? I ve just been using dogs as stops and then use either my face vice or I have the Veritas wonder dog to apply clamping force.

- Bill_Steele

Yes, I am referring to the ones you tap down to seat and tap the back to release. My concern would be the wear on the inside of the dog hole over time since the holdfast relies on side pressure on the inside of the hole. My thought is the CA glue helps harden the inside of the hole, but is it enough to keep the hole from being deformed drastically over the long run.

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