Shaft taper fit - area of contact
Shaft taper fit - area of contact
(OP)
Looking through various EN and ISO standards has not helped. If the shaft or hub is blued and fitted together [rotated] a percentage area of the other component is marked.
I am looking for guidance on what would be an acceptable marked area? Some publications for machine tool spindles state 80%! Is there any basis for this or other values?
The actual taper is for a replacement hub with a 1/10 taper at 190 dia, at the small end, x 280 long and is used to support and fix a "disk" of 4000 kg.





RE: Shaft taper fit - area of contact
RE: Shaft taper fit - area of contact
Johnny Pellin
RE: Shaft taper fit - area of contact
RE: Shaft taper fit - area of contact
RE: Shaft taper fit - area of contact
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http://www.riverhawk.com/prg.php
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http://www.spindlegrind.com/inspection.htm
"When we regrind the seat we typically get 95-100% contact. Less than 70% should be considered in need of regrinding. Also note where the contact is. It should be evenly around the seat. A little heavier contact on the large end is acceptable, but heavier contact in the small end is not good. This is typical of a bellmouth condition, caused by normal wear, and should be reground.
Inspection with an air gage will tell you if the gage is seating properly. But, it will not tell you what the problem is, if it is not. For this reason I prefer to use bluing and plug gage."
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http://www.spindles.org/regrinding.asp
"Grinding continues until an acceptable level of taper contact has been achieved (usually no less than 90 percent contact and in most cases closer to 100 percent). At this point the spindle taper grinding process is complete. "
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http://www.edmundsgages.com/technical8.htm
RE: Shaft taper fit - area of contact
"Meets or Exceeds API 671 and ISO 10442 requirements"