Upright machining?

[twinturbo]

Sounds easy enough, I just remember when I started a Locost back in 2004 that this was one of the difficult bits to get done ( or there was no information ). Which is why I bought Astra bottom ball joints.

I gave up that build due to a number of issues and sold the chassi.. I got an email last year from the guy that bougt the bits saying he needed a quick letter to state the chassis was new as he was about to register the car

TT

[twinturbo]

Which was the question i was asking. is the taper the correct angle. Seems there is some doubt..

TT

[twinturbo]

Anyone got one to measure then?

TT

[RAYLEE29]

I used the 19mm Axminster one set up in the pillar drill and kept cutting and checking till i was happy with the fit basiclly full nut and washer of thread sticking out the top and the largest bit of the taper just visible below the upright.
The taper is a good enough fit that after only tightening a little the need to be tapped to get back off.
Ray

[twinturbo]

That still does not answer the question though. Is the taper of the axminster reamer the correct angle to match the ball joint taper?

The taper on the joint should be paralel to the taper in the hole otherwise there will be a loose fit at one end or the other.

TT

[Davey]

A couple of points are coming to light here, firstly the question of the correct taper, I'm using Granada uprights and I'll check them for the taper before I go reaming anything out. Secondly is a comment someone made about using a reamer, you do not use it like a tap. You should never turn a reamer backeards as it blunts the cutting edge. With a tapered reamer you simply lift it out of the hole every so often while turning it forwards.

D.

[RAYLEE29]

Originally Posted by Davey

A couple of points are coming to light here, firstly the question of the correct taper, I'm using Granada uprights and I'll check them for the taper before I go reaming anything out. Secondly is a comment someone made about using a reamer, you do not use it like a tap. You should never turn a reamer backeards as it blunts the cutting edge. With a tapered reamer you simply lift it out of the hole every so often while turning it forwards.

D.

whilst i agree with what you say it is a known practice to run reamers backwards in some situations doing so can give a tighter hole size especially if the reamer is new and could cut oversize due to being too keen obviously you need to know what your doing so unless your an experienced engineer dont try it at home
Ray

[RAYLEE29]

Originally Posted by twinturbo

That still does not answer the question though. Is the taper of the axminster reamer the correct angle to match the ball joint taper?

The taper on the joint should be paralel to the taper in the hole otherwise there will be a loose fit at one end or the other.

TT

Sorry you didnt understand my post inmo the taper is perfect
im sure there are hundreds if not thousands of kit cars on the road that have uprights modded using this reamer
but if your not confident to do the job yourself get it done by someone who is
Ray

[twinturbo]

I guess if they are not falling out then there must be a good amount of interferranc along the length ot the taper.

I am quite confident doing it so long as the tool is right for the job.

TT

[RAYLEE29]

mine worked fine