How to hold this part?

[Brad93]

Am I best to make a mandrel to hold this castor?

it’s got a flat worn in in. I’ve got two to turn round again.

obviously I need the outside true to the centre.

Already tapped the grease holes for nipples which were untapped

Original bore was probably 1”.

They are off an EPCO 5 tonne jack

 

[Hood]

Probably get away with just holding it against the chuck jaws with a live centre and pressure. Just don't try and take massive cuts.

 

[Brad93]

Probably get away with just holding it against the chuck jaws with a live centre and pressure. Just don't try and take massive cuts.

I’ll only be skimming it as it’s cast iron and I need to keep the strength.

 

[Hood]

I’ll only be skimming it as it’s cast iron and I need to keep the strength.

Well that is the way I would do it.

 

[mtt.tr]

Cut a tight arbor with a thread and nut to pull it tight to the spindle haven't got to fight for space that way

 

[Hood]

I use the pressure method quite a lot, you just have to be canny.
Here is a bit of brass that I turned round before flipping and gripping to get the rest done, much quicker than putting the 4 jaw on.

This is what it ended up as

.

 

[pressbrake1]

Cut a tight arbor with a thread and nut to pull it tight to the spindle haven't got to fight for space that way

To much faffage
I’d do it hoods way, if I got excited a short stub arbor held tight with the centre in the tailstock

 

[Hood]

To much faffage
I’d do it hoods way, if I got excited a short stub arbor held tight with the centre in the tailstock

"faffage" I will have to remember that one

 

[Brad93]

Probably get away with just holding it against the chuck jaws with a live centre and pressure. Just don't try and take massive cuts.

Just tried this I haven’t got a big enough centre. Mine is smaller than the 25mm bore

 

[Hood]

Just tried this I haven’t got a big enough centre. Mine is smaller than the 25mm bore

Two choices then, make a wee plug up to batter into the hole for the centre or make an arbor up.

 

[Migmac]

"faffage" I will have to remember that one

Me too.

 

[outofthefire]

wont the jaws hold it on the inside edge, you can then use the live centre on a plate with a hole drilled in it

 

[Rrobson]

Got any inch fasteners or stud bar? Clamp the fastener and nip the castor tight on to the fastener. Would be worth putting a centre hole in the keep it true and stop it pulling out the chuck. An inch bolt would probably need a tiny skim so once it's skimmed it'll be true.

 

[mtt.tr]

To much faffage
I’d do it hoods way, if I got excited a short stub arbor held tight with the centre in the tailstock

I cheat, turn some star stock with an bolt welded on. Welded is always plugged up so no real issue.

 

[duncans]

To much faffage
I’d do it hoods way, if I got excited a short stub arbor held tight with the centre in the tailstock

made me laugh that coment did

 

[mtt.tr]

I use the pressure method quite a lot, you just have to be canny.
Here is a bit of brass that I turned round before flipping and gripping to get the rest done, much quicker than putting the 4 jaw on.

View attachment 228116

This is what it ended up as

View attachment 228117 .

Brilliant for cutting the teeth of saw blades . They make great celotex saws.

 

[pressbrake1]

made me laugh that coment did

Faffage is like faffing x 10

 

[Hood]

wont the jaws hold it on the inside edge, you can then use the live centre on a plate with a hole drilled in it

Probably rough casting there so not true to the hole.

 

[mike os]

Quick mandrel, big washer and live centre

 

[Hood]

Brilliant for cutting the teeth of saw blades . They make great celotex saws.

You lost me there, as soon as you start talking builders language I am lost