Posted by: yachen007 ® 08/07/2006, 18:10:13 Author Profile eMail author Edit

I had a problem regarding a knurled shaft pressed into a motor lamination. The blank shaft OD is .3150-.3153, the 40 pitch knurl OD is .318-.320, and the lamination ID is .3160-.3165. From time to time, too much resistance arisen when the knurled shaft pressed in. Any suggeustion will be helpful. Thanks!

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Re: Knurled Press fits
Re: Knurled Press fits -- yachen007	Post Reply	Top of thread	Forum

Posted by: randykimball ® 08/07/2006, 18:51:21 Author Profile eMail author Edit

So this is a fine knurl that only raises the diameter aprox. .005"? My first reaction is that the starting diameter should be dropped .001 or .002, and the knurl should be raised a little more OR back to the same size. You are almost a press fit without the knurl. Also, you may try chilling the shaft before insertion. Otherwise... trial and error. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them.

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