this sort of thing
has anyone got any for free? how easy are they to make?
this sort of thing
Funny I'm thinking the same thing. I was just going to get some 0.5" square tubing and make it up as I go along. I think they lift about
10" and its a 1:1 lever ratio. I was going to make it 3 feet long as my gearbox sticks our quite a bit at the back.
What do you think?
different chassis mine, very different, mine will only be able to lift the front and sides.
i'd have thought 1" box minimum? maybe down to 3/4" at a push?
they look easy enough to make, but its more the pivots, how far it needs to go back past vertical etc.
I guess the goes back untill the handle is flat with the floor, so the angle could be determined by the angle the handle is from vertical when flat
and in the above image.
Seen also im images such as this
http://www.rallydesign.co.uk/images/Jack%20Product.JPG
Ive got a load of 'scrap' 1inch box and have also thought of making one, particularly as most have life ratings of around a ton, and as im
lifting just one end of a 500kg car and am fairly strong i feel i could probably push the height envelope a bit to attachive maybe as much as 6inchs
lift (from 4inchs clearance to 10inchs) or more.
Daniel
i was reading my bathroom rally design catalogue this morning thinking exactly the same thing.
not done the calcs but i imagine m10 socket caps for the pivots and 1/2" tube should suffice for a 7.
tom
There is no valid reason for making it in a single tube size IMO.
The handle needs to be largest as its subjected to significant bending loads. The uprights under the car are in compression and the lower
longitudinals see minor compression while the rest is in tension. Id be going for a mixture of half inch and 3/4 inch box with a nice large round
section handle, probably in aluminium.
The trick is working out the linkage lengths so that the uprights under the car go over centre, and then the weight of the car holds the handle flat
along the ground in the up position.
Most of them seem to be very low indeed, normally for single seaters and stuff but there would be scope for some 3 inch wheels or something and
raising the whole mechanism so you get your 6 inches of lift, but from normal locost ride height.
how much do these go for, i think i could knock one up easy
quote:
Originally posted by welderman
how much do these go for, i think i could knock one up easy
quote:
Originally posted by indykid
quote:
Originally posted by welderman
how much do these go for, i think i could knock one up easy
£75-150 iirc
sounds good to me 3 quid, materials cost 127 quid, bargin 
130 all in lump sum
Joe
[Edited on 28/5/10 by welderman]
You don't need plans, you have them already with the picture, you can see all the parts and you can use the block paving for scale
quote:
Originally posted by fha772
You don't need plans, you have them already with the picture, you can see all the parts and you can use the block paving for scale
i want one that can lift at least 12" i think. i guess the only thing i'll need to find is the tube the
bolts go through. will need to be a tight fit won't it. should be easy enough
quote:
Originally posted by blakep82
i want one that can lift at least 12"
We have one to lift a pinto powered race car at 500kg, front is easy rear engine rear box physicaly hard to lift. lifts about 6" in total 2.5" ride hight has a 1" dia handle 5ft long which bends slightly when lifting i think it's up here with us i could measure any dimensions over weekend
Have you considered using one of these?
I'd call it Fence-Post-Lift
What you do is push it under the car by around 1/4 of its length under a sturdy area of chassis. Then you lift it up (quickly if you so desire,
although it can operate at any of your chosen speeds). Then you need the "brick Mk1" accessory, which you can slide under the post
(normally using foot).
For other tasks you can use said "quick fence post lift" to raise the vehicle onto axle stands, which are more secure when working under the
car. Or moving the car laterally, for when you can't be bothered to start her up and you dropped a bolt underneath.
I can confirm that this also works on a Phoenix!
The only problem, is that you look like a country bumkin when you take it along to track-days!
Matt
quote:
Originally posted by matt_gsxr
Have you considered using one of these?
...
The only problem, is that you look like a country bumkin when you take it along to track-days!
Matt