Hello Gurus,
As some of you remember and helped, I have this Craftsman Disc/Belt sander which I restored. It is turning out to be a super useful tool. Need to attend this kind of urgent repair because when you get used to having a tool and it is down, you feel more helpless than when you didn't have the tool in the first place
The Disc is fixed on the round shaft with the help of a set screw. Please see pictures below. One problem with it (and has gotten worse) is that the disc is coming loose now more often. I am able to tighten the set screw but after it starts rotating it comes loose soon. I have a feeling the threads in the Disc collar are stripped somewhat.
I am thinking of using a slightly oversize tap and cut new threads.
Now while I am at it I am thinking of making two mods -
a. replacing the set screw with a regular screw because reaching the set screw through the dust shield/shroud is a PITA.
b. filing the shaft and create a flat surface for the screw to hold. Currently the shaft is just round.
Do you guys see any problems with these mods? I am wondering if it is OK to use a regular screw. Is there a reason why set screw is preferred? Am I going to cause a slight off-center load due to bit of screw & its head hanging out? I doubt it but don't know if at high speed it matters? May be that is why they use a set screw in such situations?
Also, is there a same issue of creating some kind of imbalance if I filed the shaft to have a flat surface for screw?
Thanks a million in advance.
- Nicer
As some of you remember and helped, I have this Craftsman Disc/Belt sander which I restored. It is turning out to be a super useful tool. Need to attend this kind of urgent repair because when you get used to having a tool and it is down, you feel more helpless than when you didn't have the tool in the first place
The Disc is fixed on the round shaft with the help of a set screw. Please see pictures below. One problem with it (and has gotten worse) is that the disc is coming loose now more often. I am able to tighten the set screw but after it starts rotating it comes loose soon. I have a feeling the threads in the Disc collar are stripped somewhat.
I am thinking of using a slightly oversize tap and cut new threads.
Now while I am at it I am thinking of making two mods -
a. replacing the set screw with a regular screw because reaching the set screw through the dust shield/shroud is a PITA.
b. filing the shaft and create a flat surface for the screw to hold. Currently the shaft is just round.
Do you guys see any problems with these mods? I am wondering if it is OK to use a regular screw. Is there a reason why set screw is preferred? Am I going to cause a slight off-center load due to bit of screw & its head hanging out? I doubt it but don't know if at high speed it matters? May be that is why they use a set screw in such situations?
Also, is there a same issue of creating some kind of imbalance if I filed the shaft to have a flat surface for screw?
Thanks a million in advance.
- Nicer
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