bell puller question

[capt.dunc]

i was kicking about with some ideas for making a puller, and i thought it would work better if one of the threads was sinister. is this the case, or are the screw and the thread on the puller both the same hand?

[toomush2drink]

Hmm im not sure what your getting at. It only pulls on the head of the screw not turn it. You drive in the screw first with a torx bit then place the puller over the screw head, it locates in a slot. Now you start tightening with the spanner or socket.

[capt.dunc]

so does the tip end of the puller have a swivle? i was thinking that if the thread of the pulling rod was left handed then any twist transfered to the screw would cause it to fix into the lock further, untill the sloted section at the working end of the puller touched the cylinder face when it couldn't go further.
or if the screw and the pulling thread were both right handed, but the thread on the puller was steeper than the pitch of the screw, if it would pull without a noticable untwist transfer to the screw?

[Shrub]

No it isnt that type of puller,

They are more like a bearing puller, they dont swivel but the force involved lets the tool swivel on the screw to take the twist out

You can also get away with making one from an impact puller (dent puller), these are basically a weight on a shaft with a stop on one end and a grip for the screw on the other, you bang the weight to hammer out the lock,

[rohi]

Follow this link and scroll down a bit, you'll see some pictures of the
bell puller. I have the same one, it works perfect but you need to use type "extra" screws, otherwise you'll be breaking a lot of them before youre cilinder is giving way. (this is with euro's, i dont now how strong youre cilinders are , but i never use smaller screws again, it's a waist of time and money.)


Please, don't be upset by me owning a puller, i use it raerly nowadays.
Only if some joker has obstucted a keyway or tryed drilling before calling a locksmith to let them in.

RoHi

[rohi]

You might want that link i mentioned

www.zieh-fix.com/Shop/index.html?lang=en-us

scroll down about 5-6 items.

[capt.dunc]

cheers shrub,

They are more like a bearing puller, they dont swivel but the force involved lets the tool swivel on the screw to take the twist out

i thought that might be the case

if the screw and the pulling thread were both right handed, but the thread on the puller was steeper than the pitch of the screw, if it would pull without a noticable untwist transfer to the screw

and thanks rohi, you've not upset me by owning a puller, if your a locksmith it's just another tool, i think we all prefer picking.

[Shrub]

No worries