John Deere 2650 steering arm

[carbon]

Try Ron Greet they break tractors

 

[sako243]

We've used it on compressor shafts and vanes spinning at a few thousand RPM

Constant loading though in one direction I'd imagine in that application? This one will be getting shock loads all over the place.

 

[Gareth J]

We've used it on compressor shafts and vanes spinning at a few thousand RPM

Nothing like the torque put through a lever arm like this though. Potentially with really high dynamic loads too.

Like I say, I've no experience of the epoxys mentioned so, as you and others are quite confident, and it's a pretty low cost/reversible thing to try, probably worth a go.

But gut feeling is that it won't survive.

 

[Brad93]

Constant loading though in one direction I'd imagine in that application? This one will be getting shock loads all over the place.

We've also used it to bed mill tables with 20 ton rolls bouncing up and down.

 

[Brad93]

Nothing like the torque put through a lever arm like this though. Potentially with really high dynamic loads too.

Like I say, I've no experience of the epoxys mentioned so, as you and others are quite confident, and it's a pretty low cost/reversible thing to try, probably worth a go.

But gut feeling is that it won't survive.

It will survive. It's used all over industry - it's a bit more special than a bit of JB weld!

Even if you had to do it every year or two would it be the end of the world?

 

[addjunkie]

It will survive. It's used all over industry - it's a bit more special than a bit of JB weld!

Even if you had to do it every year or two would it be the end of the world?

Belzona 1111 is commonly used to build up wear surfaces and remachine. Pig launchers door seals, and high pressure #2500 flanges. Pump casings too. Only down side its blooming expensive to buy.

 

[Guineafowl]

Cheers all, I’m looking into breakers to start with.

Might try making an insert anyway, for practice.

That Belzona 1111 looks the stuff, but 1kg for £300 is a bit beyond me. They should sell small splats of it for £20 and open up the amateur market.

 

[Brad93]

LOOK up resimac they are all the same

 

[chrismac]

Cheers all, I’m looking into breakers to start with.

Might try making an insert anyway, for practice.

That Belzona 1111 looks the stuff, but 1kg for £300 is a bit beyond me. They should sell small splats of it for £20 and open up the amateur market.

you need to get on Gumtree and set your location to Aberdeen, there used to be quite a selection available of one type or another.

 

[Brad93]

you need to get on Gumtree and set your location to Aberdeen, there used to be quite a selection available of one type or another.

All pinched on the shutdowns haha

 

[Guineafowl]

All pinched on the shutdowns haha

Indeed they have been

 

[addjunkie]

All pinched on the shutdowns haha

Not quite….Belzona 1111 is a contingency product, bought as a just in case product by the shutdown contractor. Jobs finished, no future storage, site is cleared.

Where do you think mine came from!

 

[addjunkie]

It keeps surprisingly well.

Pardon our interruption...

 

[chrismac]

It keeps surprisingly well.

Pardon our interruption...

just what the man is looking for

 

[Guineafowl]

I’ve made a female tapered insert to match the good arm, rightly or wrongly, like this:

- A 10deg angle block and a parallel fitted the taper nicely, so I took that to be 5deg per side.

- Set compound to 5.5deg, machined male taper, then fiddled the angle till the good arm fitted nicely, using marker pen as blue.

- Bored out female taper in the insert with boring bar upside down, till male taper fitted same distance as it does in the good arm.

Next stage is to cut the female splines. They’re not square in section, so might need some advice on making a cutting tool. Pics to follow.

No easy way of dividing on the lathe, but there is a 20T spindle gear fitted. Can I use that to index, say, teeth 1,6,11, 16?

 

[Guineafowl]

Not looking very feasible, this.

Insert is made from hydraulic cylinder ram, so hard going. That tool is sharp, but this little scratch took me about 20 minutes. Too much deflection. Could I brace the tool with something, and how would I attach it without ruining the HSS?

 

[Wildefalcon]

Is that too hard? Thinking you'd want the easier to disassemble part to contain the sacrificial/softer repair part.

 

[Guineafowl]

Is that too hard? Thinking you'd want the easier to disassemble part to contain the sacrificial/softer repair part.

It’s what I had in that size. I was hoping it was only induction hardened on the surface, which has been machined away.

 

[mikegolding]

I have cut key ways like that a few times in a lathe and it is slow going. I found that the rake on the front face of the tool makes a large difference , to much and the tool pulls into the job to little and it deflects away . Get the right balance and its a lot better.
Mike.