2
$\begingroup$

Apologies for the probably daft question, I am thinking of buying a small KURODA ball screw (180 mm overall length, 8mm diameter, 2mm lead). I have a photo from the seller and I noticed a wider area towards one end of the screw. I suspect it is for mounting a pulley (it seems to have a screw flat area). Can you please confirm if my understanding is correct?

enter image description here

$\endgroup$
2
$\begingroup$

That is a wrench flat, presumably used when installing a nut on the conventional threaded portion at the left end.

The overall enlargement into which the wrench flat is machined probably faces either a bearing or possibly some short of pulley that would installed between it and the threaded portion to the left.

$\endgroup$
1
$\begingroup$

It could be used for a sprocket/gear/pulley but that is not its purpose.

The driven end of the screw is usually attached directly to a motor shaft by a flexible collar which allows some minor misalignment. The part marked "End support mount" has a threaded portion for the nut to lock the shaft into the end bearing.

The undriven end is allowed to "float" in its bearing to allow for expansion, usually secured with a circlip.

The part with the flat is then on the inside of the bearing and inside the machine. It is not a required part of the mechanism and appears unique to that manufacturer.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.