What are you machining?

[Munkul]

Thanks @Seadog
Could be an expensive jaw.

What should I be looking for?
Tool steel, 01, 02, silver steel?
Would en24 be any use?

EN24 will harden up to to HRC 46 which I would have thought would be pretty darn good for vice jaws

 

[ukracer]

Thanks @Seadog
Could be an expensive jaw.

What should I be looking for?
Tool steel, 01, 02, silver steel?
Would en24 be any use?

Even youngsters are going to have the same problem as us oldies.
Prices rising rapidly but our brains still remembering prices from 20 years ago.

Only yesterday seeing a cafe advertising home made soup and thick toast for 3.50 and me thinking wow. (Obviously thinking back to 15pence a tin tomato soup and 30p a loaf of crust bread)

Obviously things like a nice to have pipe jaw will see expensive as materials double almost overnight.

 

[ukracer]

EN24 will harden up to to HRC 46 which I would have thought would be pretty darn good for vice jaws

Is there a chart anywhere that lists this type of stuff?

 

[Seadog]

Thanks @Seadog
Could be an expensive jaw.

What should I be looking for?
Tool steel, 01, 02, silver steel?
Would en24 be any use?

Silver steel and gauge plate are the same thing, although there are different grades. I'm sure someone here will have a suitable piece kicking around.

 

[Munkul]

Is there a chart anywhere that lists this type of stuff?

I just googled it.

https://www.smithmetal.com/pdf/engineering/en24.pdf

Convert Brinell hardness to HRC as it's a better scale for actual hard things. Mild steel doesn't even make it onto the HRC table.

 

[Dcal]

Thanks all.
I'll have a sniff around the fab and machine shops I know and see if anyone has something.
The one I've made will do for now, so no mad panic, but it's all good learning for me..

 

[Seadog]

You could always put a wanted ad on Homeworkshop.org for a piece.

 

[Kram]

What size do you need? I have 38mm² bar which is glass hard all the way through, flame cut from plate, might stick some in furnace see if I can anneal and harden. Had some bits if o1 somewhere.

 

[Dcal]

40 x 70 x 12 would be ideal
It would need to be annealed but I don't mind having a go at that either but since you went to the bother of making the kit.........

 

[Kram]

I think I have some O1 that would fit. Is that two peices? It would need slicing down the middle.

Found an email, but its hiding. Will have a proper look later.

 

[Dcal]

Thanks @Kram I only need one piece and I can cut it down to size.
If you can sort me out, I'll pm to arrange the transfer of beer tokens

 

[Kram]

Found the O1, is a peice 73 x 43 x 25mm ok? I have a use for the 35mm offcut.
It'll be under 1kg, pm me a post label. If it stops raining I'll get it sent tomorrow afternoon.

 

[Dcal]

Found the O1, is a peice 73 x 43 x 25mm ok? I have a use for the 35mm offcut.
It'll be under 1kg, pm me a post label. If it stops raining I'll get it sent tomorrow afternoon.

PM sent

 

[Richiew]

Right. This doesn't look like much, but today I have cut a taper into a piece of bar on the lathe. I've also cut a 3/16ths keyway slot on the mill, centre-drilled and tapped an internal M6 thread and finally cut an m12 nub on the other end to centre the piece for welding or brazing together tomorrow.

This tractor steering wheel has a taper in the centre. I tried measuring the major and minor diameters plus the length of the hole to calculate the taper angle. In practice, I didn't get anywhere close. I looked up common machine tapers on line to get a better idea and found an mt2 taper jammed in the orifice was a reasonably close but still a slack fit. I settled on a 1.4 degree taper and knocked the compound angle around on the lathe after each test cut and fit to get somewhere close.


Looking good at this end.

There's a big chamfer at both sides of the steering wheel boss, hence the apparent gap below.

I've cut off the bent bar handle showing below and I'm looking to braze the spigot onto the round boss. My brazing is neater than my welding. It will make more sense once it is all together.

 

[8ob]

Look the other way @Hood and @Kram, I have been on the lathe

Found a "ripened" bit of 8" diameter bar in the rusty slug bank and spun it up to make a pressing tool for installing some gurt abs rings.

 

[Munkul]

Replacement wheel for my belt grinder drive wheel which cracked. JEI wanted £340 for a new plastic one! Spent £100 on the lump of ally and about 8 hours of my time.

 

[Lewis_RX8]

Replacement wheel for my belt grinder drive wheel which cracked. JEI wanted £340 for a new plastic one! Spent £100 on the lump of ally and about 8 hours of my time.

View attachment 342123

I Like the key cutting on the lathe , just a bit of HSS there and back and forth action? .

 

[Munkul]

I Like the key cutting on the lathe , just a bit of HSS there and back and forth action? .

Just some mild steel it's a bit rough on the lathe saddle though even for aluminium, i wouldn't want to cut steel that way.

 

[Johnnybravo]

Just some mild steel it's a bit rough on the lathe saddle though even for aluminium, i wouldn't want to cut steel that way.

A bit of a tweak with the cutting and relief angles would improve that a lot. What you can also do is turn a spigot to go into the bore,then drill a suitable sized hole half in the pulley,half in the spigot. Makes it a lot easier to get the keyway in as alot of material is removed before you start slotting

 

[Lewis_RX8]

A bit of a tweak with the cutting and relief angles would improve that a lot. What you can also do is turn a spigot to go into the bore,then drill a suitable sized hole half in the pulley,half in the spigot. Makes it a lot easier to get the keyway in as alot of material is removed before you start slotting

Ah smart then you only cut the edges into squares rather than remove all material, Bit like when you drill a hole and sit chuffing away with a file to try and square it up.