LumberJocks

Virtual Designs in Sketchup #14: Clamp for cutting Dovetails

  • Advertise with us
Blog entry by rance posted 912 days ago 4762 reads 3 times favorited 9 comments Add to Favorites Watch
« Part 13: Simple Corner Spline Jig Part 14 of Virtual Designs in Sketchup series Part 15: Dovetails ...with Curves »

I ran across the ”Workbench clamp for perfect dovetails” article by Michael Pekovich from Fine Woodworking.

The article suggests drilling holes in your bench to accomodate pipe clamps to hold down a guide board. I REALLY like the clamp idea but even though I revere a bench as a consumable, I’d rather not drill THAT big of holes in it.

I’ve come up with an alternate solution that does not require any new holes in your bench. This means it can also be used in whomever’s workshop you might visit. This is a real plus for me since I often work in other’s shops.

If you straddle this block across the corner of your bench, you can achieve the same effect but not have to drill holes in your bench. I also swung the head of the clamps outwards to give more room for your hands when holding the chisel.


 

I drilled a blind hole for the upper pad of the clamp to keep them oriented for easier setup. Without these shallow countersinks, the clamps could easily rotate around making the tightening process difficult.


 

The added slat(shown transparent), spanning the lower part of the bars, corrals the lower part of the clamps. This should make it much easier to put in place until you get the clamps tightened down (and is required once you swivel the clamps outwards).


 

You’ll also note that I’ve incorporated the more commonly found bar clamps. A wide variety of clamps could be used for this though.

Credits: Again, this is not my idea. I just enhanced the “Workbench clamp for perfect dovetails” article by Michael Pekovich from Fine Woodworking. I am(again) merely standing on the shoulders of others greater than I.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--



9 comments so far

View StumpyNubs's profile

StumpyNubs

6116 posts in 1398 days


#1 posted 912 days ago

Can I use this idea in my show a couple weeks from now? I’m demonstrating some hand cut dovetails on the tool cabinet and I want to try this out. If it works like it looks like it will, I’ll recommend it to the viewers. (I’ll give credit to both you and Fine Woodworking)

-- It's the best woodworking show since the invention of wood... New episodes at: http://www.stumpynubs.com

View gfadvm's profile

gfadvm

10551 posts in 1288 days


#2 posted 912 days ago

Rance, I like that idea. MUCH better than drilling big holes in a beloved bench! Once again, I am in awe of your Sketch Up skills.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View rance's profile

rance

4125 posts in 1758 days


#3 posted 911 days ago

Use to your heart’s content Stumpy. :) Thanks Andy.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View swirt's profile

swirt

1935 posts in 1569 days


#4 posted 911 days ago

Nice work rance. You know me… always trying to keep things simple…
If you left off the bottom block of wood and flip the clamps upside down, you could achieve the same thing. (I think)
Flipping the clamps upside down, allows you to get the handles out of your way AND it lets you pivot the clamps inward so the clamp screw would just push against the bottom of the bench, while the clamp end would push down on the block.

It would allow you to shorten up the overhang of the block ends so you’d be less likely to smash into them with your hip/leg/other vital equipment. ;)

-- Galootish log blog, http://www.timberframe-tools.com

View Joe Lyddon's profile

Joe Lyddon

7620 posts in 2650 days


#5 posted 911 days ago


I’m wondering if you could do the same thing with a couple of these?

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View rance's profile

rance

4125 posts in 1758 days


#6 posted 911 days ago

Swirt, I think that would work just fine.

Joe, I’m not a big fan of wood screws. In this application, the key is to get a clamp that won’t fall off. It keeps from needing 3(or more) hands to align and tighten up the works.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View rance's profile

rance

4125 posts in 1758 days


#7 posted 873 days ago

Swirt, I like your suggestion. Something like this maybe?

The upper block could more easilly be built as follows:

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View Brit's profile

Brit

5107 posts in 1440 days


#8 posted 873 days ago

Great idea Rance, or at least your adaption or someone else’s idea. One for my favourites. Thanks for posting.

-- Andy -- Old Chinese proverb say: If you think something can't be done, don't interrupt man who is doing it.

View Brit's profile

Brit

5107 posts in 1440 days


#9 posted 873 days ago

In fact using Swirts idea, you could mount it on the front of the bench instead of using the corner of the bench. Ideally, you’d want the workpiece positioned over a leg with the clamps either side, so the mallet force is directed down the leg.

-- Andy -- Old Chinese proverb say: If you think something can't be done, don't interrupt man who is doing it.

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase