Keyway design
Keyway design
(OP)
Hi all,
I am designing a keyway to fit a 7.625" Shaft. I sized the key and keyseat and everything looks good from a stress point of view, however, I am more curious about the positioning of the key.
The key is 1.75" W X 1.5" H and 10" Long with radius equal to half the width of the key on the ends. The key is positioned in the middle of the shaft, so it drops into a slot.
The corresponding hub butts up to a shoulder in the shaft, at one end of the key, my question is, how far away from the mating face of the hub/shoulder should the closest edge of the keyseat radius be?
Let me know if I need to describe this clearer...
Thanks,
Tyler
I am designing a keyway to fit a 7.625" Shaft. I sized the key and keyseat and everything looks good from a stress point of view, however, I am more curious about the positioning of the key.
The key is 1.75" W X 1.5" H and 10" Long with radius equal to half the width of the key on the ends. The key is positioned in the middle of the shaft, so it drops into a slot.
The corresponding hub butts up to a shoulder in the shaft, at one end of the key, my question is, how far away from the mating face of the hub/shoulder should the closest edge of the keyseat radius be?
Let me know if I need to describe this clearer...
Thanks,
Tyler





RE: Keyway design
As far as mating, you need to maximize the length of contact in order to obtain key functionality, so you can come close to that shoulder assuming no stress risers such as sharp fillet or such. Probably a sketch would be better to comment upon.
But good luck with it.
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: Keyway design
=====================================
(2B)+(2B)' ?
RE: Keyway design
https://
=====================================
(2B)+(2B)' ?
RE: Keyway design
John R. Baker, P.E.
Product 'Evangelist'
Product Design Solutions
Siemens PLM Software Inc.
Industry Sector
Cypress, CA
http://www.siemens.com/plm
http://www.plmworld.org/museum/
To an Engineer, the glass is twice as big as it needs to be.
RE: Keyway design
RE: Keyway design
Your shoulder makes things more complicated.
I think the answer is that you have to decide what you want to fail first, and how.
Mike Halloran
Pembroke Pines, FL, USA
RE: Keyway design
1 - The keyway needs to extend all the way past the hub in at least one direction... otherwise you can't assemble it.
2 - as mentioned by Cockroach... to extend the effective length of the key within the hub.
=====================================
(2B)+(2B)' ?