Pulley Slipping on D shaft: What should I do?
Pulley Slipping on D shaft: What should I do?
(OP)
thread406-235196: D shaped bore in timing pulley
Hi,
I am having a problem with my pulley slipping on a D shaped drive shaft. I just read the referenced thread and learned from Compositepro that a D shaft isnt designed for high torque operations. I suppose I made a few assumptions, one being that this is not a high torque operation. I guess it is. No matter how tight I make the set screws, the pulley ends up loosening up.
Do I need a different pulley or a different shaft?..or both?
This is the pulley I am using:
http://www.mcmaster.com/#pulleys-for-belts/=7smyh3
It has 2 set screws
this is the shaft I am using:
http://www.mcmaster.com/#precision-shafts/=7smz4k
I only need 2 of these to work, so labor over cost is probably the best way to go for me.
Should I even bother drilling a mark in the shaft for the setscrew to key into?
Thanks so much
Hi,
I am having a problem with my pulley slipping on a D shaped drive shaft. I just read the referenced thread and learned from Compositepro that a D shaft isnt designed for high torque operations. I suppose I made a few assumptions, one being that this is not a high torque operation. I guess it is. No matter how tight I make the set screws, the pulley ends up loosening up.
Do I need a different pulley or a different shaft?..or both?
This is the pulley I am using:
http://www.mcmaster.com/#pulleys-for-belts/=7smyh3
It has 2 set screws
this is the shaft I am using:
http://www.mcmaster.com/#precision-shafts/=7smz4k
I only need 2 of these to work, so labor over cost is probably the best way to go for me.
Should I even bother drilling a mark in the shaft for the setscrew to key into?
Thanks so much





RE: Pulley Slipping on D shaft: What should I do?
Ed Danzer
www.danzcoinc.com
www.dehyds.com
RE: Pulley Slipping on D shaft: What should I do?
Ted
RE: Pulley Slipping on D shaft: What should I do?
Mike Halloran
Pembroke Pines, FL, USA
RE: Pulley Slipping on D shaft: What should I do?
I am working on getting you the technical information that I left out from my original post.
Thank you for your responses.
Happy 4th for those of you in the states!
RE: Pulley Slipping on D shaft: What should I do?
have you tried loctite on the setscrews.
an other easy way to do this, is a thread & nut to hold pulley in place & apply with loctite.
my favorite but more expensive is to drill holes in the pulley & have a flange on the arbor with matching tapped holes. bolt in place with loctite. will never come loose.
& is very secure. I design reishaur & OD grind arbors this way. I never use set screws to flimsy & slip easily.
there must be lots of vibration to loosen the set screws.
what is the vibration. dynamic balance required?
Mfgenggear
RE: Pulley Slipping on D shaft: What should I do?
Ted
RE: Pulley Slipping on D shaft: What should I do?
D an T
RE: Pulley Slipping on D shaft: What should I do?
I ended up welding a 1/8" steel plate to the shaft and bolting the plate to the pulley using 1/4-20 bolts.
It looks pretty strong...I will be testing it shortly.
Here is a picture after it was already assembled so it was hard to get a good shot, but I think this will clarify.
Again, thanks for all the responses.
RE: Pulley Slipping on D shaft: What should I do?
Russell Giuliano
RE: Pulley Slipping on D shaft: What should I do?