Board logo

replacing lower ball joint with a rose joint, drill out the taper?
MK9R - 8/3/12 at 09:05 AM

I'm replacing the lower ball joint on the fury front unpright with a rose joint, the tapered inserts I got dont fit the escort upright (made for cortina I think), is there any readson why I shouldnt just drill out the taper and use a standard bolt?

HowardB - 8/3/12 at 09:11 AM

Morning Austen,

First guess would be that the taper works just like a morse taper on a drill and as such does not depend solely on bolt tension to stop rotation.

Hope that helps, and sorry if I've spoilt your cunning plan.

Peteff - 8/3/12 at 09:31 AM

What size bolt would you need if you drill out to the size of the bottom of the taper ? It would be better if you got an adaptor and use the same size bolt as the nut that holds the present ball joint.

MK9R - 8/3/12 at 09:38 AM

Current ball joint uses 1/2", could drill out taper to 5/8", which would leave plenty of meat on upright (widest point of taper is 5/8", rose joint is a 5/8" so just use a decent quality 5/8 bolt.

MK9R - 8/3/12 at 09:39 AM

quote:
Originally posted by HowardB
Morning Austen,

First guess would be that the taper works just like a morse taper on a drill and as such does not depend solely on bolt tension to stop rotation.

Hope that helps, and sorry if I've spoilt your cunning plan.


the ball in the rose joint allows all the rotation, just like all the other pickups on the suspension

HowardB - 8/3/12 at 09:42 AM

quote:
Originally posted by MK9R
quote:
Originally posted by HowardB
Morning Austen,

First guess would be that the taper works just like a morse taper on a drill and as such does not depend solely on bolt tension to stop rotation.

Hope that helps, and sorry if I've spoilt your cunning plan.


the ball in the rose joint allows all the rotation, just like all the other pickups on the suspension


Yes of course, what I meant was that the taper stops the shaft rotation,.. probably only a problem in a poorly maintained system where the ball might seize, or get stiff.

[Edited on 8/3/12 by HowardB]

mark chandler - 8/3/12 at 10:22 AM

You can, but would need to ream the hole for a very close fit, better off buying pins to mount the rose joints

MNR link

Like here

MK9R - 8/3/12 at 11:10 AM

Tried to buy them in the past from mnr, they dont sell them. I can get some made by a chap locally, but I'm just wondering if its really necessary

phelpsa - 8/3/12 at 12:32 PM

Where did you get the cortina taper adapters? Would you sell yours? I was about to get some made but it would save a lot if hassle if I didn't have to!

Rich J - 8/3/12 at 04:13 PM

Are these what your after?

1 x ford/105e/100e/cortina/capri/corsair/race/rally/autograss/brisca 5/8' taper | eBay

he also does 1/2" steering arm ones

[Edited on 8/3/12 by Rich J]

Lew The Machine - 11/5/12 at 08:14 AM

Did anyone find a solution to this?

Im currently looking at the same problem and cant find a design/supplier of these taper adaptors anywhere and i really dont fancy drilling the upright, id like to keep it a bolt on conversion!

iank - 11/5/12 at 11:01 AM

quote:
Originally posted by Lew The Machine
Did anyone find a solution to this?

Im currently looking at the same problem and cant find a design/supplier of these taper adaptors anywhere and i really dont fancy drilling the upright, id like to keep it a bolt on conversion!


Same seller as Rich J pointed out still has them.

eBay Item

Lew The Machine - 13/5/12 at 12:53 PM

Yeah lol, realised they were still listed on that guys eBay page after I posted up here, only question Ive got is is a 5/8 rose joint a better choice than an M16? As his taper bolts are for 5/8! I've never really messed about with rose joints :-S