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A pile of marking knives. *LINK*

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A pile of marking knives. *LINK*

#1

A pile of marking knives. *LINK*

Derek Cohen (in Perth, Australia)

>I just finished making a pile of dovetail marking knives for the guys on the Ubeaut (Oz) forum. The approximately 1 1/4" long blades are made from jigsaw blades that I surface ground, polished and double bevelled. Tip-to-tip length is about 6 1/2".

A link to a tutorial on building these is below.

Here are some of the total. In Jarrah and in Sheoak.



and a few more ...



No, I'm not offering any for sale. This is just an experiment and anyway they'd be too expensive from Oz. Both Chester Tool Works (Dave anderson) and Blue Spruce (David Jeske) make terrific products.

Regards from Perth

Derek


A Knife for Marking Dovetails (tutorial)

Re: A pile of marking knives. *LINK*

#2

Hey Derek...

Rob Brophy

>Nice work...very graceful!

Making the knives out of jigsaw blades is a brilliant idea. A number of years ago I found jigsaw blades that came with a knife edge instead of teeth. This would probably save you some time and effort prepping the blades. Can't imagine why we bought them...possibly for cutting styrofoam sheeting? I'll dig around in the shop and see if I can come up with a manufacturer's name. We usually use Bosch jigsaws, so it's probably one of their blades...is Bosch readily available in Australia?

Rob

Re: A pile of marking knives. *LINK*

#3

Nice looking knives!

Scott Burr in Ben Lomond, CA

>

Re: A pile of marking knives. *LINK*

#4

Re: A pile of marking knives.

dave jeske

>Nice work Derek. I'm sure all your friends will be thrilled! I have made a few from sheoak (or lacewood) and it comes out looking very nice with an oil/varnish finish. It is quite a bit more difficult to work with then cocobolo though.

Dave

Re: A pile of marking knives. *LINK*

#5

Re: A pile of marking knives.

stephen wiseman

>Thanks a lot - VERY nice! Especially the ferrule tip!

Stephen

Re: A pile of marking knives. *LINK*

#6

Re: Hey Derek...

Derek Cohen (in Perth, Australia)

>..is Bosch readily available in Australia?

Hi Rob

Yes, Bosch is certainly available (as an aside, I think Bosch make excellent equipment but they doi not get the same recognition in Australia as they are given in the USA).

I am not sure what composition these blades are (which is what I suspect you are implying) - think that it is more likely to be HCS. They do not appear to be HSS as it is possible to be burned on a sander. For honing, I use a fine diamond stone and finish on a strop (by hand). They hold a good edge. I have used the same one in Jarrah endgrain for some months without re-honing.

Regards from Perth

Derek

Re: A pile of marking knives. *LINK*

#7

Re: A pile of marking knives.

Dave Anderson Chester, NH

>Very nicely done Derek the handle design is quite handsome. Just a warning though. It starts with making one for yourself, then it progresses to a few for friends. The cycle repeats a couple of times. Next thing you know you have a side business going and your recreational furniture making and woodworking begins to suffer. DAMHIKT. ;-)))))

Re: A pile of marking knives. *LINK*

#8

Re: A pile of marking knives.

Frank D. in Montreal

>Hi Derek,

I'm going to go make a post on the Aussie forum right now...so feel free to send me a handful of those. They look quite nice.

Re: A pile of marking knives. *LINK*

#9

Re: A pile of marking knives.

Norman (Ottawa, Ont.)

>Sweet!

Derek, if you have an extra one or two, I'll give you my address.

As of today, I beta test marking knives :)

Norman

Re: A pile of marking knives. *LINK*

#10

Can't See Any Pictures

Tom Colligan

>Hi Derek, On your tutorial I can't get any of your pictures to appear. Is there anything you can recommend?

Thank you and very nice work as always. Tom

Re: A pile of marking knives. *LINK*

#11

Can't See Any Pictures

Tom Colligan

>Hi Derek, On your tutorial I can't get any of your pictures to appear. Is there anything you can recommend?

Thank you and very nice work as always. Tom

Re: A pile of marking knives. *LINK*

#13

Re: Can't See Any Pictures

Derek Cohen (in Perth, Australia)

>Hi Tom

The link and the website are both working correctly for me. Does anyone else experience a problem?

I will try and send you the article via email.

Regards from Perth

Derek

Re: A pile of marking knives. *LINK*

#14

Re: Can't See Any Pictures

Todd O. Cronkhite Maine Native, Presently Away

>The teeth of the blades are ground off on a belt sander

What type of paper and what grit are you using?

Very nice looking knifes Derek.

Todd O.

Re: A pile of marking knives. *LINK*

#15

Grits for the belt and disk sander.

Derek Cohen (in Perth, Australia)

>Todd

I use a 60 grit belt on the belt sander. A belt sander runs fairly cool compared to a slow dry grinder, but this optimises it for rapid steel removal and coolness. Note that we are only talking about the edge of the blade. I would not use a 60 grit on the face - it would leave deep scratches that would be difficult to remove. For flattening and smoothing the front and back of the blade I surface grind using the disk sander section with grits from 240 to 600. The V-bevel is honed using a jig to get the angle (60 degree V and 30 degree bevel), then honed freehand on a diamond stone and leather strop.

Regards from Perth

Derek

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