What lathe?

[blsnelling]

you need some pvc to make mandrels from. it works well and is easy to work with

Are you using the Type II PVC? I read that it's more durable.

 

[Tzed250]

Brad, shorten your setup. Way too much stick out from the chuck. Enough material to go to the squish band, enough to go in the chuck, and enough room to get the tool to the part. Any more is weakening the setup which will lead to difficulty cutting the work piece, or levering it out of the chuck. Short is strong, strong is good.

 

[FATGUY]

well done Brad!

 

[blsnelling]

Brad, shorten your setup. Way too much stick out from the chuck. Enough material to go to the squish band, enough to go in the chuck, and enough room to get the tool to the part. Any more is weakening the setup which will lead to difficulty cutting the work piece, or levering it out of the chuck. Short is strong, strong is good.

Thanks John. I appreciate the tips from all of you guys.

 

[Tzed250]

Thanks John. I appreciate the tips from all of you guys.

No problem. Feels good to cut the metal yourself, huh?

 

[blsnelling]

No problem. Feels good to cut the metal yourself, huh?

It really does.

 

[Mastermind]

That's so last year.......popups are out of fashion ya know.



Just funning you Brad. I'm curious though......what did you support the tail end of the mandrel with when you were cutting it?

 

[Stihl 041S]

Brad, shorten your setup. Way too much stick out from the chuck. Enough material to go to the squish band, enough to go in the chuck, and enough room to get the tool to the part. Any more is weakening the setup which will lead to difficulty cutting the work piece, or levering it out of the chuck. Short is strong, strong is good.

Ditto. All I thought was "hangin out a frickin mile"

 

[FATGUY]

Brad, shorten your setup. Way too much stick out from the chuck. Enough material to go to the squish band, enough to go in the chuck, and enough room to get the tool to the part. Any more is weakening the setup which will lead to difficulty cutting the work piece, or levering it out of the chuck. Short is strong, strong is good.

I'm to blame for that, I gave him a piece of material that was longer than it needed to be. You can always take more off, hard to go the other way.

 

[Stihl 041S]

Ditto. All I thought was "hangin out a frickin mile"

But 30,000 hrs on a lathe and you notice these little things.

I've done worse when learning!!!

 

[Stihl 041S]

I'm to blame for that, I gave him a piece of material that was longer than it needed to be. You can always take more off, hard to go the other way.

The things one doesn't think about after a while.

On the other hand, Brad said there is a use for the function keys on a keyboard....

I've never used them......

 

[Stihl 041S]

The things one doesn't think about after a while.

On the other hand, Brad said there is a use for the function keys on a keyboard....

I've never used them......

Things to learn;

Liquid nitrogen to shrink a bearing right. Not always. Sometimes it ends up a different size. The wrong size....

 

[Tzed250]

I'm to blame for that, I gave him a piece of material that was longer than it needed to be. You can always take more off, hard to go the other way.

Sometimes impossible. When I worked my first job we had two CNC bandsaws. Operators on second shift would set them to run unmanned until first shift got there in the morning. Quite a sight to see thousands of dollars worth of bar stock cut up into piston blanks that were 3mm too short.

 

[FATGUY]

Sometimes impossible. When I worked my first job we had two CNC bandsaws. Operators on second shift would set them to run unmanned until first shift got there in the morning. Quite a sight to see thousands of dollars worth of bar stock cut up into piston blanks that were 3mm too short.

That sight can make you weak in the knee's. Automation is certainly not without it's consequences. I worked in the blow mold industry when I lived back home. "Lights-Out" machining was a way of life. Load the tombstones up on multi pallet machines and hit cycle start on your way out Friday night. Monday morning either looks like carnage, or pure profit. You get away with it enough times and you're still ahead after a bad weekend. Interestingly though, I saw a machine at IMTS that would check tool height before it put the tool away. If it was different than when it started, it would stop the machine from continuing. No more broke the cdrill which broke the tap drill, which broke the countersink which broke the thread mill/tap. Pretty cool stuff, don't know how new that is, I just hadn't seen it before.

 

[Stihl 041S]

Sometimes impossible. When I worked my first job we had two CNC bandsaws. Operators on second shift would set them to run unmanned until first shift got there in the morning. Quite a sight to see thousands of dollars worth of bar stock cut up into piston blanks that were 3mm too short.

Or screw up a casting you have been waiting 8 months for.....

 

[FATGUY]

Or screw up a casting you have been waiting 8 months for.....

that casting was screwed up long before it got to me..... :msp_tongue:





(sorry, reflex)

 

[FATGUY]

That's so last year.......popups are out of fashion ya know.



Just funning you Brad. I'm curious though......what did you support the tail end of the mandrel with when you were cutting it?

he was probably right in that area where you're not sure if you'll need the tailstock or not. The rule of thumb I use is if I have more than 3 X Diameter outside the chuck, I'll watch carefully to see if I need the tailstock or not. You can sometimes get away with more...

 

[Stihl 041S]

that casting was screwed up long before it got to me..... :msp_tongue:





(sorry, reflex)

Our motto is:'as long as there is weld wire, nothing is scrap !

 

[parrisw]

Brad, just me, but I always machine enough off to run a gasket. I feel better with a gasket in there.

 

[Andyshine77]

Brad, just me, but I always machine enough off to run a gasket. I feel better with a gasket in there.

I felt the same way until I was forced to use sealant a few times, I no longer have any issue running without a gasket. The modern sealants are awesome!!