Rose Jointed Wishbones Again

[allanallen 528 2 Cars]

Afternoon all, after a string of ovaled hubs and knackered ball joints on my road rally car I/we decided enough was enough! Fenton and I combined our grumpyness and opinionatedness and made these

 

 

They use cheapo McGill 3/4unf joints sleeved down to 16mm with a en24t drop pin. I've just come back from a spirited drive down a very rough white near me and I'm still alive! Only time will tell how long the joints will last but I've used alot of them now on other cars and haven't had any failures.

Just thought some of you would be interested as there have been a few threads recently about making your own. These cost around £40 to make as we had a pair of wishbones already and obviously have the tackle to do it all ourselves.

I'll update this thread after our next rally in may, hopefully it won't be an obituary although I'm sure some of you may prefer that! ????

[BlueBolt 156]

I'm seriously impressed with the cost difference you have there!! Interested to see just how long they do last for too, even of the bj's only last as long as the bushes then it can't be a bad thing!!??

[marksorrento205 80]

Good effort If they hold out, which I don't doubt they will, I may be interested in a pair if you are willing to make some more

[chipstick 382 1 Cars]

1. Chipstick

[hcmini1989 16]

2,hcmini

[Shakey_Jake 3 1 Cars]

Oooooh rose joints

 

Good work!

 

Any pics of the drop pin before fitting?

[Adrian247 5 1 Cars]

Think I would put some rubber boots over the joint and pack them full of grease, may just help them last a bit longer........

[kee 22]

have you got room to drop the joint and improve roll centres on lowered cars or is it too close to the brake disc?

 

I could do with something like this but with a polymer bush for the roadgoing class i want to race in

[Spiky 37]

Look like the way I made mine

 

To backup the McGill rj's

 

I'm using 3/4 as 3/4 and have had this setup for 2 years plus, no issues so using these joints is fine

 

And on track they have bounced over lots of kurbs

[allanallen 528 2 Cars]

Think I would put some rubber boots over the joint and pack them full of grease, may just help them last a bit longer........

I've purposely left the boots off so I can keep my eye on the joints they'll be stripped and thoroughly checked over after the 061 in a fortnight, I'll fit he seals then.

 

Yes you could easily make longer drop pins and bigger spacers to help with rollcentre. My rally car runs standard ride height so we obviously didn't bother mind. Bollocks to poly bushes though

 

That's good to hear spiky! To be fair branded 3/4x3/4 rose joints aren't that dear if the cheapo ones don't last that long.

 

Can't believe no ones pulled me up on the zip tied shaft boots yet!? In the words of shaggy..... 'It wasn't me'

[allanallen 528 2 Cars]

Oooooh rose joints

Good work!

Any pics of the drop pin before fitting?

No sorry, although it just looks like a silver m16 bolt with the head modified a bit.

[Spiky 37]

My drop bolt is 12.9 unf bolt

 

I bought boot's but was advised not to fit them, if water got in it would destroy it in no time

 

So never borhered

[allanallen 528 2 Cars]

My drop bolt is 12.9 unf bolt

I bought boot's but was advised not to fit them, if water got in it would destroy it in no time

So never borhered

I was wondering that about the boots but the ones I've got are an incredibly tight fit! In the past all I've ever done is periodically clean them and apply motorcycle chain lube. To be honest I'm not arsed if I have to change them once a year because they cost peanuts.

[Spiky 37]

Mine have a little notch too for pinch bolt, probably safer with 12.9? But I'm sure yours will be ok

[Spiky 37]

As my car is apart I just took a pic if it

 

[allanallen 528 2 Cars]

Mine have a little notch too for pinch bolt, probably safer with 12.9? But I'm sure yours will be ok

Mine have a little notch too for pinch bolt, probably safer with 12.9? But I'm sure yours will be ok

Not being funny but my pins are en24t so far more up to the job than a hi tensile bolt! I'd be more concerned about yours, can you actually get unf bolts in 12.9? By the looks of your pins/bolts the joint is sat on the thread rather than the shank aswell?! I'm sure you've had no problems but I wouldn't be happy fitting those bolts/pins to my car sorry.

Mine have obviously got the notches for the pinch bolts but I thought that'd be fairly obvious. Rather than the big not h you have mine have been machined to the correct diameter and depth for the bolt to fit perfectly and add to the strength

Edited May 6, 2013 by allanallen

[Spiky 37]

I don't know what en24t lol just saying what I have

 

I will check where the joint rests , I have inserts on my rj's too so I can use a bigger rj

 

I've no plans to change my as they been fine since they were fitted

[allanallen 528 2 Cars]

I don't know what en24t lol

not sure how you can judge mine as being 'ok' then!

[welshpug 1,657]

what do you guys reckon on machining the arm to take a spherical joint rather than using a rod end?

 

use the same drop bolt I'd imagine, I don't need it to be adjustable, just cheaper to replace than a complete GOOD quality wishbone.

[Tom Fenton 1,542]

Not enough material in the standard arm, plus the spherical bearing wouldn't give enough articulation before binding up.

[Batfink 201]

 

I was wondering that about the boots but the ones I've got are an incredibly tight fit! In the past all I've ever done is periodically clean them and apply motorcycle chain lube. To be honest I'm not arsed if I have to change them once a year because they cost peanuts.

pack them full of grease?

[Cameron 16]

Not wishing to rock the boat, but..

 

EN24T:

Tensile Strength = 850-1000MPa

Yeild Stress = 680MPa

 

Grade 12.9:

Tensile Strength = 1200MPa

Yeild Stress = 720MPa

 

So I would trust the bolt a little better.

[Tom Fenton 1,542]

Tensile strength isn't the be all and end all here. Fatigue resistance is what is required and 24T is superior to a 12.9 grade bolt.

[allanallen 528 2 Cars]

I know it's been done but I'm not convinced its a brilliant idea, as Tom says there's not gonna be a massive amount of movement and that's be dependant on your ride height

[allanallen 528 2 Cars]

Tensile strength isn't the be all and end all here. Fatigue resistance is what is required and 24T is superior to a 12.9 grade bolt.

Bingo