Spring Compessor

[colin jones]

Hi all, here's some diagrams and pics of how to make a spring compressor so you don't have to wear a carrier spring as a neck tie or rearrange your face.

[colin jones]

To make the threaded shaft, I would suggest to buy some 5/8UNF threaded rod and some nuts and they should be 8.8/s (High Tensile). I would thread 3 nuts onto the thread so they just touch each other and weld them all together. It would pay to bevel all joints so you get a good deep weld all around. After they're all welded you can unscrew them and put them in a lathe and turn them down so they slide into the tube nicely. Put the threaded rod into the nuts 2 or 3 threads, cover the thread with a piece of tube so you don't damage the thread when you weld the threaded rod to the nuts. Mind you, this is just an alternative if you don't want to have that part made at a engineering shop or machine the whole part. You may be able to buy extended nuts to do the job.

[colin jones]

Just as a point of interest, if you don't think your welding is not up to scratch I would strongly recommend that you get someone who will guarantee that it will not break under pressure as it will under enormous tension.

[Doug Lavoie]

Colin,
Thank you for following up with the spring compressor tool drawings and info. This should make the job a darn sight easier and safer to do.
Again tThank you for following up on your promise.
Doug

[Lew Skelton]

cheers Colin, might just make one, good to compare your drawings to the photos.
Lew

[super dave]

Thanks for the info it will come in handy to make one up


Dave

[super dave]

As I was checking my shaft a spring setup the Australian carriers must have a smaller diameter shaft as I just measured my Canadian one and it is 3/4"x12TPI and not the 5/8 UNF as you have specified for the Australian carriers. So there would have to be some dimension revisions if we would like to make one to use on the Canadian carriers. Just thought I would let everyone know if you were going to make one for the British/Canadian carriers

[Lynn Eades]

Dave, yes the rods are interchangeable with the correct nuts, however you do need the matching threaded inner part to the puller.

[colin jones]

Sorry all, that is a serious slip of the pen. Yes the thread is 3/4. Please accept my appology
Colin.

[Rob Beale]

I have made a new inner shaft with the correct internal thread for Universal Carrier spring rods. The outer tube and nut were reused.

It works a treat, although the pitch of the thread means it takes a lot of turns to pull the rod through the opposite cup.

I ground an old spanner to fit the flats on the rod to ensure the tool is wound all the way onto the spring rod end.

The only thing it won't do of course is pull a rod through a seized/rusted on spring ball!

Rob

[colin jones]

Hi Rob, that's great you made one. It is a very slow operation to wind it down but you know it's safe. The only thing I know that will get the shaft out of a seized and rusted ball is heat and I have tried all sorts of things. In fact I snapped a hydraulic shaft in two with my 100 tonne press and it never moved the shaft without heat.
Need some pictures Bob.
Colin.