Lathe charging.

[ukracer]

If they are hardened then an endmill or slot drill in carbide will be easy


Are The bushes different then?

Bushes were also very hard but slowly slowly catchy monkey.

Biggest issue is this damn keyway. I hate being beaten. Lol

 

[ukracer]

You also get 3 flute carbide drills which are excellent, I picked up a few Guhring ones, brand new, for very little money but if buying new you need to be sitting when asking for the price

View attachment 286306

This is my problem. I don't know if I buy things if it will do the job. Most stuff I have is HSS unless it's for larger stuff.

 

[PhillipM]

I thought the same as Barking Matt so how wrong was I lol...

Really depends what the firm is doing with their CNC, I was setup for prototype work like that back when I was doing it, I would have had that drawn up, set up and off the machine in 15 minutes. Production work? Lot longer for them to fit one offs in.

 

[ukracer]

Thanks for the help on this milling holes. I managed to get it done with some solid carbide but I managed to get from a chap locally.

I learnt you don't cut slowly (back gear speed on Bridgeport) with carbide though. One bit totally broke up. Second one made short work of it at lowest normal gear speed.

I do need to find a decent supplier of sensible priced bits now I have broken one. (Local Guy has no more). They vary so much on eBay and EW and Rennie don't seem to have those sizes...

I can't find any 9mm or 11 let alone sensibly priced.

 

[Brad93]

You do get boring bars that take inserts and go down to 8mm and below. I sold a solid carbide shank one a few days ago that I think was 8mm although may have been 10, the bar was def 8mm. Anyway there are also solid carbide bars that go way down in size, WNT do a set at a good price every so often and are well worth having as you can get all sorts of bars for them including grooving, threading, turning etc, see pic.

Top bar does down to 5mm, I have smaller.
View attachment 286298

As has been said though a solid carbide end mill or even a drill would work.

Remind me where you bought these?

 

[Hood]

9 and 11 are not normal sizes, maybe 3/8 and 7/16 would do? Then again not sure how easy it would be to get imperial anyway.

 

[Hood]

Remind me where you bought these?

WNT, they have them on special every so often.

 

[Brad93]

Can’t seem to find them now, I remember I found them last time you said.

 

[Hood]

Can’t seem to find them now, I remember I found them last time you said.

You're lucky, I can't even find the online shop now.

 

[Brad93]

You're lucky, I can't even find the online shop now.

Looks to have shut down and replaced by cerazit crap website

 

[Hood]

Aye and I can't log in

 

[ukracer]

You're lucky, I can't even find the online shop now.

It's amalgamated with 3 other suppliers I believe.

 

[ukracer]

Looks to have shut down and replaced by cerazit crap website

But you are right it is a crap website.

 

[Hood]

It's amalgamated with 3 other suppliers I believe.

Aye, Ceratizit, WNT, Komet and Klenk all one now.
PITA was that when I had the account with WNT there was no way to change your email so I had to contact them. They did change it for my login but they didn't change for my contact so not sure if I can get logged in again, will see, currently locked so will have to email them.

Regarding the milling cutters, you should go CNC, doesn't matter what size cutter you have, well as long as it is smaller

 

[ukracer]

9 and 11 are not normal sizes, maybe 3/8 and 7/16 would do? Then again not sure how easy it would be to get imperial anyway.

I suspect I don't need such small increments since I increased the cutting speed and was amazed how well it did actually cut. I only had to open an 8mm hole to 12mm.

I was amazed the way it collapsed and crunched when the cutting speed was slow but cut like butter when the speed was higher.

 

[ukracer]

Aye, Ceratizit, WNT, Komet and Klenk all one now.
PITA was that when I had the account with WNT there was no way to change your email so I had to contact them. They did change it for my login but they didn't change for my contact so not sure if I can get logged in again, will see, currently locked so will have to email them.

Regarding the milling cutters, you should go CNC, doesn't matter what size cutter you have, well as long as it is smaller

What's a CNC cutter. How does it differ.

 

[Hood]

I suspect I don't need such small increments since I increased the cutting speed and was amazed how well it did actually cut. I only had to open an 8mm hole to 12mm.

I was amazed the way it collapsed and crunched when the cutting speed was slow but cut like butter when the speed was higher.

You should be able to go in with a 12mm end mill no problem.

What's a CNC cutter. How does it differ.

Not a CNC cutter, I am meaning a CNC mill.
With CNC you can do circular interpolation so no need for the exact diameter cutter, just tell it to cut in a circular motion

 

[ukracer]

Me again.been a bit busy during the last few weeks but I have just been asked to take 10mm of some steel bars with approx 20 of 30mm holes in it.
Definately hardened and my fly cutter ain't too happy at cutting it.
Would you all use a tipped milling cutter or get some CBO tips for it...assuming they are available

 

[Brad93]

Me again.been a bit busy during the last few weeks but I have just been asked to take 10mm of some steel bars with approx 20 of 30mm holes in it.
Definately hardened and my fly cutter ain't too happy at cutting it.
Would you all use a tipped milling cutter or get some CBO tips for it...assuming they are available

View attachment 300409

Facemill. Although no carbide really likes an interrupted cut.

 

[Hood]

Facemill with a strong insert. I have been using Korloy LNMX inserts for a good while now and they have been quite robust even though they are just general purpose grade for light cuts.
I was milling a Sandvik Capto holder just a wee while ago and it breezed through it and they are hard. Then again it is a fairly rigid mill so...