Gallery, Projects and General > How do I??

making fine indexing marks?

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chipenter:
I have used these for engraving but they are very delicate https://www.banggood.com/Wolike-10pcs-3_175mm-Shank-0_1mm-V-shape-Carbide-PCB-Engraving-Bits-10-Degree-Cutter-p-1170163.html?rmmds=search&cur_warehouse=CN .

picclock:
@ chipenter
Ordered :-)
This is exactly what I was looking for, and at a cheap price too. I could find nothing like it on AliExpress or in the uk ebay, only tools that were for plastic or aluminium.

Will probably try the tilted endmill approach but this looks much easier.

Many thx

picclock

efrench:
There is a ton of carbide engraving bits on Aliexpress.  Here's one which has a list of all their 3.175mm shank engraving bits.

RotarySMP:
If you don't want to go too deep, then drag engraving works in steel.

Did this in aluminium, but you can see the tool. Just an old carbide end mill ground to a 90° point, and spring loaded.
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Mark

picclock:
@efrench
Thanks, that's an excellent link. I spent ages trying to find something like that on Aliexpress, but failed. I was probably not using the correct search terms.

I did a quick test using a 3/16 carbide endmill on a scrap piece of cold rolled steel held in the vice at 45 degrees, and the result was OK. The metal wasn't square to the Y axis but as the picture shows the lower of the two lines was around the correct width.

Many Thanks

Best Regards

picclock

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