looking for cutter for manually cutting parallel grooves

[surplusjohn]

Here are two tools I made by stacking utility knife blades together. It's the right idea. I can make these wider. Also useful in case I ever get sent up the river

 

[surplusjohn]

Tthese are some of the tools I use. From left to right:
Blades in handles, burnished, tri scraper, ex lyons take, scribe, carbide pcb drill in holder, scalpel, graver cutter, pcb drill in dowel, hacksaw blade in wooden handle.

 

[surplusjohn]

 

[Bill D]

How do they make defraction gratings and Fresnel lens? There is a machine to do that.
A microtome could be used to make the cutting edge.
Use a phonograph record as a mold to metal plate onto.
Bill D

 

[FredC]

Know anyone with a wire edm? This could be made relatively quick. They could just wire out a 50 tpi style cutting edge on a 1" wide piece of steel.

I had one EDMed like this 40 years ago. I just looked in my tool box and it is still there. Mine was done on a 3/8 X 1 high speed steel blank for use on a turret lathe. Made many pillars for accurizing rifles with it. No reason it could not be done 50 lines to an inch with the advantage it is a lot easier to hold than messing with a tap. If this is a repeat job the tool would be easy to set up on a variety of machines.

 

[BoxcarPete]

Set your shaper to .020 per stroke, load up a pointy tool, and Bob's your uncle.

 

[michiganbuck]

I could make that cutter in post #23 of solid carbide and one inch wide (tungsten carbide tipped) with an insert silver brazed on a shank, *but I am not volunteering to do so.
I would guess such a cutter would cost a couple hundred or more.
for a one-up, one would waste a diamond wheel with dressing a one-time use.

 

[michiganbuck]

I think these are about .o35 thick.. they could be side-ground to .020 on a surface grinder and then stacked to 1" wide.

Amazon.com

I bought a pack of these years ago, but now forget what I used them for.
at $21 for 50 a good start to the box cutter.

 

[sfriedberg]

The machines that Ries and Bill D referred to are "ruling engines", a reasonably close relative to "rose engines". Always a rare, specialty device, and the ones for diffraction gratings are more like a piece of experimental physics lab equipment than a piece of gear you can buy from a catalog and have trucked to your shop.

 

[Ries]

The machines that Ries and Bill D referred to are "ruling engines", a reasonably close relative to "rose engines". Always a rare, specialty device, and the ones for diffraction gratings are more like a piece of experimental physics lab equipment than a piece of gear you can buy from a catalog and have trucked to your shop.

exactly. they are just what he wants, but very rare, and usually have a high antique tool value.
If it was me, I would do this with a single point cutter in my milling machine. Lock the spindle from rotating, and use the DRO on my x axis to get my line spacing. I use rotating single point cutters in my Gorton engraving machine, but the same cutter fixed would cut a nice groove.

 

[boslab]

Was thinking, cut a threaded rod, then section to make a cutter?
Just a thought
Mark

 

[snowman]

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That gives you the cutter in HSS, just have to find a handle of some sort