Thread: What is your favorite method for attaching gears to shafts?
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Unread 24-06-2002, 04:00
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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double-d with tight press fit
Posted by Joe Johnson at 04/30/2001 4:48 PM EST


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.


In Reply to: What is your favorite method for attaching gears to shafts?
Posted by bill whitley on 04/30/2001 3:51 PM EST:



I have been scared to death of anything but a welded joint in the past.

This year, we used a double-d with a tight press fit in a few of our gearboxes with great success.

I still feel better with a bead of weld for the higher torque shaft/gear interfaces but at least in some situations I can sleep knowing a well designed double-d with a tight press has been executed.

One final thing, we have also had good success with a bolt on design where flanges are welded to the shafts and then gears or sprockets are bolted to the flange. As long as we have done our homework on picking the right number of bolts to use and provided that we used the shaft itself to center the gear on the shaft (rather than using the bolt pattern to hold the center to center alignment -- not a great idea) we have had a fair amount of success. One nice thing this does for you is that you can change gear ratios without having to change the entire shaft.

Just some random thoughts on gear to shaft interfaces.

Joe J.


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