I'm doing a cleanup / restoration of an old Art 4.A Sigma cutter and it's missing the top screw in the handle (Yellow Arrow in image) Handle part number is # Art 24AE I can see on the part image it is a hex screw. Without this screw the 10mm cutout slot in the cutter handle just drags along the top of the bar.
Also there's another lower hex screw behind the scribing wheel (Red Arrow in image) that has a round metal collar that is worn flat and won't spin freely. (second image) Is that where the replacement bearing goes ?
Does this model handle have two identical bearing that run along the top and bottom of the bar ?
Help please, so confused.
UPDATE ***
I found a Sigma pamphlet with a similar handle that points to the top screw and says "This handle is equipped with a system for the recovery of wear from sliding on the guide"
Can somebody with a similar model Sigma please remove the top screw and solve this mystery?
Anybody willing or able to post a pic of this screw and any part that may be inside ?
Also there's another lower hex screw behind the scribing wheel (Red Arrow in image) that has a round metal collar that is worn flat and won't spin freely. (second image) Is that where the replacement bearing goes ?
Does this model handle have two identical bearing that run along the top and bottom of the bar ?
Help please, so confused.
UPDATE ***
I found a Sigma pamphlet with a similar handle that points to the top screw and says "This handle is equipped with a system for the recovery of wear from sliding on the guide"
Can somebody with a similar model Sigma please remove the top screw and solve this mystery?
Anybody willing or able to post a pic of this screw and any part that may be inside ?
Attachments
Last edited:
