What are you machining?

[RaceDiagnostics]

Machined this up to get a stuck rotor out of a centrifuge, there's a nut welded in there. Worked a treat to separate the taper on the rotor from the motor spindle.

First time I'd used the lathe for ages. I wish I had more jobs that needed it.

 

[Smouser]

1-15/16" hole through chrome bar. Will have to borrow a big boring bar from work monday to finish out to 65mm.

One more to do after this one.

View attachment 466886

Nice. You missed the bit that says what the bar is for.....

 

[Brad93]

Weld on adapters for a 12" and 16" Auger

Just need a cross hole

 

[dan.taylor.1]

Is that the job you needed the heavy wall pipe for @Brad93? It's a bugger when you have to waste half the material you're working on to get what you need out of it!

 

[Brad93]

Is that the job you needed the heavy wall pipe for @Brad93? It's a bugger when you have to waste half the material you're working on to get what you need out of it!

yes. to be honest someone offered me some on linkedin for £80 delivered but it still needed machining down.

These took a while with HSS drills i'll be honest it surprised me how long i spent drilling.

 

[Woody.v8]

Made some spacer rings for my diff spool out of 140mm×17mm wall en16t,
A bit of a waste of material really from 17mm thick to 5.5mm but its all I had.

 

[Brad93]

Made some spacer rings for my diff spool out of 140mm×17mm wall en16t,
A bit of a waste of material really from 17mm thick to 5.5mm but its all I had.
View attachment 467085

I'll show you wasteful next week. 150mm solid cast iron bar into a 3mm wall bearing sleeve. Criminal. I'm trying to find a supplier for the Cast iron EZE-Sleeves they have in america

 

[Woody.v8]

I'll show you wasteful next week. 150mm solid cast iron bar into a 3mm wall bearing sleeve. Criminal. I'm trying to find a supplier for the Cast iron EZE-Sleeves they have in america

I believe you can get cast 'tube' if you like, A mate of mine ordered some cast to size ,probably a bit spendy though for just a bit.

 

[Brad93]

I believe you can get cast 'tube' if you like, A mate of mine ordered some cast to size ,probably a bit spendy though for just a bit.

Aye that's spun cast. Problem is we use so many different sizes of bearings it is in some ways easier to start with solid. Ideally we'd have some deep face grooving or trepanning tools to recover the core of the bar. It's something i'm looking into.

The EZE-Sleezes are cast iron, possibly spun, but premachined to suit common metric bearing sizes.

 

[tigdlo]

One of the cylinder liner manufacturers like Laystall might be able to help.

 

[Erie Fred]

yes. to be honest someone offered me some on linkedin for £80 delivered but it still needed machining down.

These took a while with HSS drills i'll be honest it surprised me how long i spent drilling.

Cranking the tailstock ?
I keep a few insert boring bars handy and have been known to exceed the min. dia. on them at times, when i tire
of using a drill.
Feed them in by hand slowly to keep chattering down and take out a large amount (3/8" on the side) and your golden.
Go back in for the next cut, speed things up, and use power feed.

 

[Woody.v8]

Some flame cut parts trued up on the od

 

[Kram]

Chainsaw sharpener, the main pivot had a lot of slop so decided to remake it.

The original pin was 7.9mm, I am replacing with 8mm silver steel rod, which I still need to chop to length


The outer housing bores were 8.5mm, Turned a pair of 0.23mm wall bushings. To do that I started with 12mm OD, bored 8.04mm first then a single cut to take 3.5mm off the OD to get 8.5mm. with a ccmt insert, the part only sees axial load so the thin wall wont be damaged.

The inner housing was 8.7mm ID
Drilled and reamed the inner housing to 10mm and turned another bushing 10mm OD, 8.04mm ID.

 

[oldbikedavey]

One of the cylinder liner manufacturers like Laystall might be able to help.

Westwood are good to deal with, or Gosnays might have some old scrap ones hanging about ..... ?
@Brad93

 

[Brad93]

Westwood are good to deal with, or Gosnays might have some old scrap ones hanging about ..... ?
@Brad93

I've got in touch with the Eze-Sleeve people and their prices are reasonable

£27 for a 100mm cast iron sleeve with 1mm left on the internal diameter to be machined out once pressed in.

 

[oldbikedavey]

I've got in touch with the Eze-Sleeve people and their prices are reasonable

£27 for a 100mm cast iron sleeve with 1mm left on the internal diameter to be machined out once pressed in.

Not so shabby !

 

[Maker]

Cranking the tailstock ?
I keep a few insert boring bars handy and have been known to exceed the min. dia. on them at times, when i tire
of using a drill.
Feed them in by hand slowly to keep chattering down and take out a large amount (3/8" on the side) and your golden.
Go back in for the next cut, speed things up, and use power feed.

Once you try a toolpost mounted drill, you'll never go back to the tailstock. So much faster, especially retracting to clear chips, not to mention the DRO and power feed.

 

[ukracer]

Once you try a toolpost mounted drill, you'll never go back to the tailstock. So much faster, especially retracting to clear chips, not to mention the DRO and power feed.

What drill do you use?

 

[Kram]

What drill do you use?

He means fitting a mt2/mt3 socket to the tool post. Without a DRO its a pain getting horizontally centered unless you can put something in the chuck first to centre the drill chuck. I rarely bother but it can be useful for holding a collet chuck. Tailstock doesnt let me use a draw bar but tool post does.

 

[Maker]

What drill do you use?

Morse taper QCTH as Kram says. I usually don't use the DRO to centre it, as long as its on centre height and there's turning marks on the face of the part, eyeballcentric is good enough. When it really matters (Small carbide drills basically) I'll use a DTI and get it perfect.