How does SAE J498b relate to ANSI B92.1 2

Matt,
SAE J498 did not have the total range of spline pitches that ANSI B92.1 did. Also the internal only had one size the external was class1 & class2, B92.1-19xx had class 4,5,6 & 7 for both internal & external.

SAE was only 30°PA, B92.1-19xx also covered 37½° & 45° splines, formerly 45°, were refered as "Serrations".

So you need type of spline, (Flat Root Side Fit), (Flat Root Major Fit) or (Fillet Root Side Fit), the (spline pitch), eg (20/40 DP), PA= 30°, 9 tooth, tooth sizes for Class 1 or Class 2 on the external member, the spec lists these actuals, and machining allowances & form & lead tolerancing.

Cheers,

matttheniceguy,

Commercial hydraulic pumps (in the US) generally have standardized flange/shaft configurations. The pump shafts with a 9T, 30deg PA involute male spline are SAE A or AA. The AA size shaft is a 9T, 20/40 DP spline, and the A size shaft is a 9T, 16/32 DP spline. ANSI B92.1 will give you the dimensions you need for a mating spline. ANSI B92.1 splines are designed with tooth thickness and space width tolerances to allow a fit between mating parts with different classes.

Your splines should be a fillet root, side fit type, because the interface is designed to be radially located by a shoulder on the pump flange, and not by the spline itself. The SAE standard pump flange spline fits are designed to be very loose to avoid any interference between the mating parts of the spline connection, which might lead to undesirable radial bearing loads on the pump shaft.

The SAE pump flange spec splines are very conservative with regards to torque capacity and fatigue life, since they are intended for use with low tolerance class fits and commercial grade materials/finishes.

Hope that helps.
Terry