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Drawbore Pins

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Project by Mauricio posted 01-24-2013 03:46 PM 2598 views 7 times favorited 40 comments Add to Favorites Watch

I am getting ready to assemble my workbench with drawbored Mortise and Tenons so I wanted to make a drawbore pin. From what I understand having one of these is not absolutely necessary but they are helpful and increase your chances of success.

Also, since I wanted to try my hand at drawboring on future furniture projects I decided to make a smaller one for furniture scale joinery.

This article by Christopher Schwarz gave me all the information I needed.
http://www.wkfinetools.com/contrib/cSchwarz/z_art/drawBoring/drawBoring4.asp

His handles aren’t turned but from what I understand turned handles will work ok as long as they are a little bigger to give you a lot of grip for the twisting and turning you will be doing.

I also found some 1” brass pluming thingies that I was able to cut down and use as ferrules. Pretty easy to cut with a hacksaw and I think they add a nice touch.

I didn’t use the torch to heat the tang before inserting it into the handle. I had the torch and everything. I guess I just chickened out. :-) What I did instead was grind down the ridges on the octagonal tang. This gave me a tight fit that I was more confident banging together with a mallet. That and the ferrules prevented the handle from splitting. I think they will hold up fine.

One more tip that I read somewhere. Since I don’t have a metal working vise. I slipped a small washer over the tip of the pin and drove the tip into a piece of pine. The washer lets you hammer the handle onto the tang without splitting the pine. I was worried about the washer scratching the pin but that wasn’t an issue.

The wood is walnut finished with shellac and wax. I got the brass pieces at Home Depot and the pins from Harbor Freight. Each tool took only a couple of hours to make.

I’ll let you know how they work out.

Thanks for looking! Questions and comments are welcome.

Mauricio

-- Mauricio - Woodstock, GA - "Confusion is the Womb of Learning, with utter conviction being it's Tomb" Prof. T.O. Nitsch





40 comments so far

View AnthonyReed's profile

AnthonyReed

5089 posts in 1193 days


#1 posted 01-24-2013 03:51 PM

They came out beautifully. Very nice job Mauricio.

-- ~Tony

View bondogaposis's profile

bondogaposis

2760 posts in 1104 days


#2 posted 01-24-2013 04:03 PM

Very nice, I’ll have to make a set for myself.

-- Bondo Gaposis

View Jamie Speirs's profile

Jamie Speirs

4163 posts in 1610 days


#3 posted 01-24-2013 04:04 PM

Those came out real nice and they going to be very strong
as the wood is really only a cover and the pin itself is the strength
they are better than the ones available elsewhere
Jamie

-- Who is the happiest of men? He who values the merits of others, and in their pleasure takes joy, even as though 'twere his own. --Johann Wolfgang von Goethe

View waho6o9's profile

waho6o9

5301 posts in 1330 days


#4 posted 01-24-2013 04:06 PM

Very nice Mauricio!

View Mosquito's profile

Mosquito

5191 posts in 1045 days


#5 posted 01-24-2013 04:16 PM

Nice work Mauricio, they look great. I blew out 2 of the joints on my travel plane till with the draw bore pin. One of these probably would have been a good idea.

Look forward to the bench assembly too

-- Mos - Twin Cities, MN -- Stanley #45 Evangelist - www.youtube.com/MosquitoMods

View Monte Pittman's profile (online now)

Monte Pittman

15523 posts in 1091 days


#6 posted 01-24-2013 04:37 PM

Your work is always quality

-- Mother Nature created it, I just assemble it.

View luv2learn's profile

luv2learn

1872 posts in 1056 days


#7 posted 01-24-2013 04:52 PM

I had to do some research on what a drawbore pin was and how it functioned. Come to find out it is the woodworkers version of a tool I used for years as a Ironworker. We called them Bull Pins or Drift Pins. We had another name for them but I won’t repeat it here. We used them to align the bolt connection holes between beam flanges and columns so that we could insert the bolts. They weren’t as delicate as these nor as pretty. Great job Mauricio.

-- Lee - Northern idaho~"If the women don't find you handsome, at least they ought to find you handy"~ Red Green

View Mauricio's profile

Mauricio

6902 posts in 1905 days


#8 posted 01-24-2013 05:03 PM

Thanks for the great comments everyone!

Mos, what caused the joint to blow out? Was the offset too big? Or are you talking about the back of the joint where the pins exit the hole? I want to make sure that doesn’t happen to me! 

L2L, that’s exactly what I used for the pins I got from HF. It’s a metal working tool repurposed for woodworking.

-- Mauricio - Woodstock, GA - "Confusion is the Womb of Learning, with utter conviction being it's Tomb" Prof. T.O. Nitsch

View a1Jim's profile

a1Jim

112937 posts in 2330 days


#9 posted 01-24-2013 05:04 PM

Very nice work. Mauricio

Luvt2learn
The difference in the two techniques is that the drawbore joint is intentionally made off-set to pull the joint tighter and supposedly stronger.

-- http://artisticwoodstudio.com Custom furniture

View Gary's profile

Gary

1056 posts in 3077 days


#10 posted 01-24-2013 05:16 PM

Thanks for the link to http://www.wkfinetools.com/index.asp
That’s a real good looking resource!

-- Gary, Florida. http://www.penturners.org/forum/f70/servicepens-2014-a-111967/

View Mauricio's profile

Mauricio

6902 posts in 1905 days


#11 posted 01-24-2013 05:29 PM

Thanks Jim!

Gary, thanks for that link. I also liked the idea of hexagonal handle and a round ferrule but I could think of how to make it right.

I especially like the hexagonal handles that also curve over the length of the handle. But it just seemed a little too complicated.

-- Mauricio - Woodstock, GA - "Confusion is the Womb of Learning, with utter conviction being it's Tomb" Prof. T.O. Nitsch

View blackcherry's profile

blackcherry

3209 posts in 2576 days


#12 posted 01-24-2013 05:31 PM

Excellent work, they came out beautiful ….please forward for a closer look…lol BC

View waho6o9's profile

waho6o9

5301 posts in 1330 days


#13 posted 01-24-2013 05:38 PM

View Mauricio's profile

Mauricio

6902 posts in 1905 days


#14 posted 01-24-2013 05:43 PM

Very cool! What is a compression nut? Is that just a regular brass nut I can get from the plumbing department?

-- Mauricio - Woodstock, GA - "Confusion is the Womb of Learning, with utter conviction being it's Tomb" Prof. T.O. Nitsch

View Brandon's profile

Brandon

4145 posts in 1705 days


#15 posted 01-24-2013 05:53 PM

Nice, Mauricio. I’ll let you know when I need to borrow them. :-)

-- "hold fast to that which is good"

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