Making an upside down parting blade holder

[@devurandom2019]

WOW 💯 I had the exact same idea 2 days ago, as a way to eliminate chatter in parting. My reasoning was the chatter is caused by chip buildup between the cutter and work piece when turning in forward direction. Before I tested this idea, I searched youtube to see if someone had done this already. Your video came up. Congrats, and thank you! ❤ Your channel is a wealth of knowledge - new subscriber. 🥳👏

[@clintchapman4319]

That's pretty cool Bud! That looks like a really nice lathe also!

[@jej_]

This tool, the idea, your workmanship, it is so helpful. Thanks so much for sharing!

[@mickgentry8128]

That parting blade looks very solid and your tool holder oiler mechanism is brilliant.

[@TrPrecisionMachining]

good job finno

[@philipbrutz2175]

Excellent work

[@MF175mp]

9:10 where is the fan club of doing these kinds of things? I would like to join it 😝

[@miguelfernandez2325]

Wow that was a fantastic video. You don't see that oil delivery on a parting tool everyday.

[@bigbattenberg]

Great ideas and execution! I was not expecting you to go and use that coolant channel in the tool. I am not convinced though by the inverted tool position. The conventional lathe is obviously designed to lead the cutting forces into the machine bed. Inverting tools will actually work to do the opposite. I might add a rear tool post which might be used for an OD chamfering tool and that would be the only tool I might mount upside down because the cutting forces are very low and the lathe can keep running in the same direction. Then again, a rear tool post is the superior solution for parting off, in which case I would like it regular, non-inverted. Further down the line might be a 4-way indexing rear tool post which would add some more tool positions...

[@joell439]

brilliant

[@DK-vx1zc]

Very ingenious! Nicely done.. Thanks for sharing. Another interesting project for the list :)

[@Bakafish]

Could you kindly add the actual Sandvik part numbers used in this excellent project?

[@FinnoUgricMachining]

Here they are: QD-RL1E26 C21 D - this is the blade. QD-NE 0200-0002 CM - this is the insert.

[@BLECHHAUS]

Sometimes upside down is better ;-) On smaller lathes it is better to use a solid rear toolpost with an upside down blade. And - the oiling mechanism is far out fantastic :_)

[@gangleweed]

Yes, for belt driven lathes with bronze bearings the rear upside down parting tool works well......BTDT. The main problem with QCTP and front parting is that the tool has too much overhang and this causes the tool to deflect down and dig in. I have an old capstan lathe and the rear mounted parting tool is 6mm wide.......parting off 50mm diam material is done at 300rpm.