Economical Micro Lathe Tooling

[uv8452]

Precision work on a TAIG needs very well ground bits as fine feeds need even more ‚fine’ cutting edges. A fine cutting edge means low cutting forces, leading to small deflections of the TAIG components. Low cutting forces are desirable in bigger machines anyhow.

After several years of constant use of my TAIG lathe I had a collection of over 30 odd shaped tool bits; these were ground from square ¼“ or 6 or 8 or 10mm blanks. The main nuisance was the ground rake angle which allowed about 10 re-grinds; after this the tool tip had to be cut off and to be ground anew.

Some day I made a parting tool bit holder for 1.5 x 5 mm blanks mounted in a toolpost with an 11° inclined toolbit seat. The (known) idea was to adjust the tool tip height by shifting the toolbit - with a ratio of 1:5.

An important benefit is the ‚rake without grinding’. You just ‚shave’ the 2 faces of the tool tip with the bench grinder. For 100 grindings you use just 10 mm of the blank.

[DIYer]

Thanks uv8452! We've added your Parting Tool Bit Holder to our Machining category,
as well as to your builder page: uv8452's Homemade Tools. Your receipt:

Parting Tool Bit Holder by uv8452

tags: tool holder

[DIYSwede]

Thanks Ulrich for yet another worthwhile tip (pun intended)!

Hat off again for your very explanatory drawings that quickly, simply and clearly only convey the necessary and relevant info.
Short, crisp and to the point - instead of cluttered pics or tedious videos stating some or other point.

Bit of nostalgia hits - your drawings reminds me of those and diagrams of my (engineering) youth,
and those pics where the crucial items were highlighted and contoured - the rest toned down,
or even the x-ray drawings of cars that kept my concentration and imagination for hours:



Thanks!
Johan

[uv8452]

Thank You, Old Swede, for the very typical and nice example.
These were the work of rare specialists. I guess that your picture could have taken them 2 to 3 weeks to complete.
I find photographs more difficult than sketches. The King of ergonomics - Apple - illustrated its manuals with black and white drawings. Very elegant.
Bye, Ulrich

[Christophe Mineau]

Hi,
Yes, same feeling as Johan above, could not say differently !
Fed up with these videos , where only the last seconds show the useful thing: simply what it is about ...
Great an useful explanations, very inspiring ! thanks.

Christophe