Hello,
I have some spiral bevel gearing that was intended to be AGMA Quality 10. Lapped after hardening. Diametral pitch = 6, Pitch diameter on pinion = 2.8.
To make a long story short, the pinion shafts bowed in hardening and we are looking to confirm the final runout allowance on the bearing journals. Based on AGMA 390.03, the total runout allowance falls between 14 and 18 ten-thousandths on the limits chart. The standard is not detailed as to the conditions in which this is measured.
1) I interpret this to mean that when I mount the pinion on the actual bearing journals, that the total runout of the pinion flanks cannot exceed 16 ten-thousandths?
2) Is there any other factor affecting the total permitted runout?
3) Have you had good experience with hard chroming and regrinding using a chuck or indicator to determine the true center of the pinion head?
Thanks,
David
I have some spiral bevel gearing that was intended to be AGMA Quality 10. Lapped after hardening. Diametral pitch = 6, Pitch diameter on pinion = 2.8.
To make a long story short, the pinion shafts bowed in hardening and we are looking to confirm the final runout allowance on the bearing journals. Based on AGMA 390.03, the total runout allowance falls between 14 and 18 ten-thousandths on the limits chart. The standard is not detailed as to the conditions in which this is measured.
1) I interpret this to mean that when I mount the pinion on the actual bearing journals, that the total runout of the pinion flanks cannot exceed 16 ten-thousandths?
2) Is there any other factor affecting the total permitted runout?
3) Have you had good experience with hard chroming and regrinding using a chuck or indicator to determine the true center of the pinion head?
Thanks,
David
