Author Topic: Fret saw and blades question  (Read 5188 times)

Offline Nordnecker

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Re: Fret saw and blades question
« Reply #25 on: May 23, 2018, 01:55:42 PM »
horologist, I'm interested in the little "c" frame thingys on your bench. It looks like one has a jewelers saw blade in it. The other looks like something thicker. That's some fine looking work you got there. Please elaborate.
"I can no longer stand back and allow communist infiltration, communist indoctrination and the international communist conspiracy to sap and impurify our precious bodily fluids."- Gen Jack T. Ripper

brokenflint

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Re: Fret saw and blades question
« Reply #26 on: May 23, 2018, 02:50:17 PM »
Thanks all for the replies, this has been a really informative thread for me and others I'm sure.  I did pickup a 5" Knew Concepts frame, liked the blade clamp and rotational system it has.  I've ordered some starter pack blade sets, once these arrived I'll report back.  Anyone going to Bowling Green, I'll have the saw with me and you are welcome to take a look at it. 

The Knew Concept website has wood working blades to use this as a coping saw also.

Horologist, thanks for the mini tutorial.  I've been using those tubes for blade storage for awhile, work really well, take little space to store  and are easily to label, I like em.

Offline dogcatcher

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Re: Fret saw and blades question
« Reply #27 on: May 23, 2018, 06:41:33 PM »
horologist, I'm interested in the little "c" frame thingys on your bench. It looks like one has a jewelers saw blade in it. The other looks like something thicker. That's some fine looking work you got there. Please elaborate.

Make that 2 of us that want more info.

Offline horologist

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Re: Fret saw and blades question
« Reply #28 on: May 25, 2018, 11:33:58 PM »
horologist, I'm interested in the little "c" frame thingys on your bench. It looks like one has a jewelers saw blade in it. The other looks like something thicker. That's some fine looking work you got there. Please elaborate.

Make that 2 of us that want more info.

I got the idea for these tools from an article about Kees Englebarts (maker of superb watch dials) in the Horological Times, there used to be a copy on the web but it seems to have vanished. At the time I needed to make the hands in the photo and thought the tool might be helpful, it was. I scaled them based on a photograph in the article and made them from some scrap brass rings. As far as I know, they are not commercially available but they are a simple project. Some detailed photos for any who want to make a copy.





They may look like saws but are actually used more like files. In one tool I can mount a short section of a standard jeweler’s saw blade, this is quite useful for getting into sharp corners or sculpting curved surfaces in areas that would be inaccessible or dangerous to the tips of my files. (Few things are more annoying than breaking the tip of a century old, irreplaceable, favorite file.) The blades are under no real tension and can be loaded with a fair amount of slack to allow the blade to follow a contour.

That first set of hands was fairly two dimensional but the tool came in very handy for this set.
The hands in this photo are not blued the dark color is an illusion created by the polished surface.



The tools are for fine details and are helpful for my watch and clock work. I am working on my first rifle and it may well be they are not particularly useful for making longrifles. Time will tell. I would be interested to hear if anyone made one and found it of use.

Troy






Offline dogcatcher

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Re: Fret saw and blades question
« Reply #29 on: May 26, 2018, 12:45:55 AM »
Thank you.  Plus I can see more possibilities, they make sandpaper cord, instead of using fingers, a couple of these to stretch it tight and you have a nice handle. 

brokenflint

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Re: Fret saw and blades question
« Reply #30 on: May 27, 2018, 05:26:47 AM »
Thanks for the pics Horologist, those little half ring "files" are really cool looking. Much smaller than I imagined!

Offline G_T

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Re: Fret saw and blades question
« Reply #31 on: May 27, 2018, 06:31:49 AM »
I have both a German saw frame (60mm I think) and a Knew Concepts saw frame (3" I think) on my jeweler's bench. I keep a finer blade in the German frame than in the other. I like both, about equally, though I reach for the German most of the time. I prefer to use the least throat I can get away with on a frame. It is less top heavy that way and I think more rigid.

The German frame has a feature I haven't seen mentioned anywhere. There is a thumb screw on the post supporting the back of the frame. When replacing a blade, that screw is loose to de-tension the frame. Replace the blade. Then with your thumb push the frame back away from the handle to remove the slack. Now when the thumb screw is turned down, the blade is properly tensioned. It is automatic. Don't overtighten the screws on the German frame as you could probably strip them and shorten the frame life.

One thing I didn't like about either saw frame is the handles. I've replaced them with much nicer ones.

Currently I think I'm using Pike blades, or Hercules white label. I forget which. They cut unhardened steel like butter. Buy them by the gross in whatever sizes you want. It is cheaper than the assortment packs which tend to have lots of sizes that you have no use for.

Gerald

Offline G_T

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Re: Fret saw and blades question
« Reply #32 on: May 27, 2018, 06:34:56 AM »
I forgot to mention, you can make your own sanding strips for saw frames. You don't have to buy someone's abrasive strips. Get some of that clear plastic tape with fiberglass strips in it, used for boxing up stuff. Put a strip on the back of your sandpaper of choice. Slice out strips, and clamp the in your saw frame. The fiberglass strip backing provides the strength. Now you have a sanding frame.

Gerald