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jmk89
27th Oct 2009, 03:13 PM
I have a jewellers saw, which I propose to use to cut brass and steel parts to make tools. How do you go about deciding which tpi you need?

MacPuddock
27th Oct 2009, 07:41 PM
Jeremy,

Try these for some pointers,

Jeweler's 'piercing saw' (http://www.dave-cushman.net/bee/piercingsaw.html)

Using a Jewelry Saw (http://jewelrymaking.about.com/od/easyfabricationprojects/a/082606.htm)

Some videos,

Art Jewelry Magazine - Metalsmithing (http://www.artjewelrymag.com/art/default.aspx?c=ss&id=122)

and a table of blade sizes,

Cheers,

Findlay.

Grahame Collins
27th Oct 2009, 09:33 PM
My late father was a jeweler. I found using his jewelers saw blades, that the the larger tpi serve to cut the softer materials much better.

Like in the larger ones coarse pitch for soft , fine pitch for harder stuff.

The chart serves to illustrate the need for keeping a certain number of teeth in the thickness of the cut.

They are best used with a hook and peg set up on the bench with the blade cutting vertically.

Do be careful as the fine teeth cut flesh really deep if used incorrectly.

Cheers

Grahame

turbo TA
2nd Nov 2009, 02:55 AM
I need to buy a jewelers saw to try some inlay work for a guitar. I had no clue about using them so I looked it up on youtube. there's a bunch of videos that explain the types of blades, how to install the blade (which I took for granted that you just clamp it in, but I was wrong) and how to cut with the saw.

Old-Biker-UK
2nd Nov 2009, 07:09 AM
This is some of the stuff I do using a piercing saw.
Cut Coins 2 (http://myweb.tiscali.co.uk/remark/pages/hobbies/cut%20coins/coins2.html)
Mark

Grahame Collins
2nd Nov 2009, 07:19 AM
Hi All
The hook and peg fixture I alluded to is shown in Marks pics above.

He had a special fixture on his jewelers bench that that the peg slid into.

The teeth on the blade face down of course ,so that the job is pulled down onto the peg.The saw frame is then tensioned after fitting the blade to keep the blade taut.


Grahame

Woodlee
6th Nov 2009, 11:01 PM
Where do you get the piercing saw blades from? most Jewellery suppliers sell by the gross , way too many for me to buy a few different sizes .
Or will I break that many learning?
I've a box full of old coins from all over the globe ,I was going to try cut coins like Mark has done.

Kev.

jmk89
7th Nov 2009, 01:20 AM
Got them in dozen packs from My Tool Store (http://www.mytoolstore.com.au/hardware-c-1.html)

Woodlee
10th Nov 2009, 12:01 AM
Thanks Jeremy .