Little Things You Hate

born-again-biker

Is looking for a 16" bar
Some dumb fuckstain has snapped off our last parting off blade, and not owned up to it and ordered a new one, and now I’m stuck at fucking work having to complete 4 brass seal seats. Half turn it, take each piece out the lathe, cut it with a fucking circ. Saw, then put back in and re clock it all up and finish it from the other side. I’d have been done an hour ago.
Yep. Been there too Mr Ultra.
For some reason the parting off blades & the boring bars always seem to get munted by muppets with "passion fingers".
Last swing I made a deal with the 1st Engineer (the overlord with the keys to Fort Knox) for access to brand new boring bars & parting off bits.
So sharp. So fast. So happy.
(just don't ask how much soul I had to sell....some things will never wash away...)
 

SummitFever

Likes Bikes and Dirt
...For some reason the parting off blades & the boring bars always seem to get munted by muppets with "passion fingers"...
There's good reason. Parting off is one of the trickier things. It pretty much involves every aspect of properly using a lathe. The tool height needs to be set to center, the tool itself needs to be parallel to the chuck face, you've got a variable feed rate from start to finish, for larger diameters you can't do it all in one cut and you've got a tool that's sort of fragile with a long stick out. If the operator doesn't have a "feel" for the machine and what they are machining it always ends in tears (or at least broken tools).
 

born-again-biker

Is looking for a 16" bar
There's good reason. Parting off is one of the trickier things. It pretty much involves every aspect of properly using a lathe. The tool height needs to be set to center, the tool itself needs to be parallel to the chuck face, you've got a variable feed rate from start to finish, for larger diameters you can't do it all in one cut and you've got a tool that's sort of fragile with a long stick out. If the operator doesn't have a "feel" for the machine and what they are machining it always ends in tears (or at least broken tools).
I've never had a problem parting-off TBH. I've never broken a parting tool. So I get frustrated with other blokes (who should know better) who are rushing/careless.

(Of course now that I have posted this, I'll bust the tool on the next job :rolleyes:)

I have, however, launched a steel coffee mug out of the 3-jaw and across the workshop....but that's another story for the FW thread :oops:
 

Ultra Lord

Beanie Fitment Specialist
There's good reason. Parting off is one of the trickier things. It pretty much involves every aspect of properly using a lathe. The tool height needs to be set to center, the tool itself needs to be parallel to the chuck face, you've got a variable feed rate from start to finish, for larger diameters you can't do it all in one cut and you've got a tool that's sort of fragile with a long stick out. If the operator doesn't have a "feel" for the machine and what they are machining it always ends in tears (or at least broken tools).
And if you call yourself a fitter/machinist/toolmaker you should know all this and act accordingly ffs and not snap both ends off the tool holder! It’s not that bloody hard.
 

born-again-biker

Is looking for a 16" bar
Do tell. Keen to hear this story.
Insulated s/steel mug was a bit too high to fit under the coffee machine because it had a flared 'skirt' around the bottom (medievil style)

No worries I thought, I'll just take a few mm off the bottom. Because it's a double wall mug (effectively hollow) you can't squeeze it very hard in the jaws or it just crushes.

I'll just go nice n easy I thought.
Prolly had the speed a bit high too.
Was feeding it super slow....real careful.... all going well.... then BOING!
The tool dug in, levered the mug out and away she flew.

I'm not proud of this confession... but you forced me to tell it

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