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Holdfast in MDF bench top

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Forum topic by Christian Holihan posted 10-30-2013 05:11 PM 2037 views 0 times favorited 11 replies Add to Favorites Watch
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Christian Holihan

85 posts in 1260 days


10-30-2013 05:11 PM

Topic tags/keywords: workbench holdfast

I have a laminate bench top of 3 1” MDF boards. Is it beyond foolish to drill a hole for a hold fast? Is there enough strength and thickness for the holdfast to work properly?

Here is a good shot of the bench when is was new and clean.

Any advice would be welcome.

-- Nobody deserves particle board | http://artisancare.org


11 replies so far

View bondogaposis's profile

bondogaposis

4024 posts in 1813 days


#1 posted 10-30-2013 05:30 PM

You could give it try, I can’t say if it would work or not. I would recommend that you chamfer the hole to avoid tear out.

-- Bondo Gaposis

View Deltarich's profile

Deltarich

23 posts in 2950 days


#2 posted 10-30-2013 05:35 PM

I would consider one of these vs a traditional hold-fast for mdf to help reduce tear out from pounding. http://www.leevalley.com/en/wood/page.aspx?p=31149&cat=1,41637

View Kaleb the Swede's profile

Kaleb the Swede

1727 posts in 1431 days


#3 posted 10-30-2013 05:35 PM

How about a T-track with hold downs. I use them in my work bench and they are indispensable. All you would have to do is rout a groove for the t-track and screw them in. The hold downs can be taken out when not needed

Something like this

http://www.grizzly.com/products/Hold-Down-Clamp-for-T-Slot-Track/D2726

-- Just trying to build something beautiful

View Don W's profile

Don W

17960 posts in 2029 days


#4 posted 10-30-2013 06:15 PM

I’d look for something along these lines.

-- Master hand plane hoarder. - http://timetestedtools.net

View Tedstor's profile

Tedstor

1625 posts in 2095 days


#5 posted 10-30-2013 06:35 PM

I have one of these. They take a minute to install and remove after each use, but nothing too tedious.

View Fred Hargis's profile

Fred Hargis

3932 posts in 1955 days


#6 posted 10-30-2013 06:45 PM

Just a guess, but I’d bet it would work. But maybe only for a while, I’d think the holes would get misshapen and worn out form continual use.

-- Our village hasn't lost it's idiot, he was elected to congress.

View GrandpaLen's profile

GrandpaLen

1643 posts in 1734 days


#7 posted 10-31-2013 12:25 PM

Try it in the MDF, if that fails you could enlarge the hole to 2” to 3” and fill it with a hardwood dowel turned on a lathe, a short section of hardwood hand rail, an ash or hickory baseball bat, and then rebore a 3/4” hole.
Could also be replaced with square stock.

...just a thought FWIW.

Best Regards. – Grandpa Len.

Work Safely and have Fun.

-- Mother Nature should be proud of what you've done with her tree. - Len ...just north of a stone's throw from the oHIo, river that is, in So. Indiana.

View 489tad's profile

489tad

3099 posts in 2473 days


#8 posted 10-31-2013 01:05 PM

I have a laminated plywood with a hard board top. I put an oak board on the underside where the hols are. So far so good.

-- Dan, Naperville IL, I.G.N.

View Wdwerker's profile

Wdwerker

333 posts in 1695 days


#9 posted 10-31-2013 01:33 PM

I would coat the inside of the holes with some finish to harden and waterproof the MDF. I bet a small foam brush would do the trick.

-- Fine Custom Woodwork since 1978

View Christian Holihan's profile

Christian Holihan

85 posts in 1260 days


#10 posted 10-31-2013 10:47 PM

Tons of solid advice from everyone. Thanks!

-- Nobody deserves particle board | http://artisancare.org

View Shawn Masterson's profile

Shawn Masterson

1297 posts in 1410 days


#11 posted 10-31-2013 11:54 PM

i believe it would work for a while. I think the problem would be the long run. the whole would wollar out pretty fast from repeated use.

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