Spline Description

Here may be part of the answer: http://www.omnigear.us/5481InvoluteSplines.aspx

Unfortunately, not all the numbers match up. For your 55/65, I'm not sure whether those are diameters, serration counts, or included angle of serration form. The L:175 seems like a length. DIN5481 is the standard specifying the "tooth" form.

Thanks Tornado,

I had looked at that site as well and drew the same conclusion you did.

Just a few cautions, not all directly to your issue.

30 years ago I was involved in a project in which we bought a continuous caster (for a steel mill) from an Austrian firm. We learned some things the hard way (hopefully things are better today):

• Metric threads (for screw fasteners) are not (a single) standard--at the very least, we ran into German metric threads and Japanese metric threads which were not compatible.

• We asked our supplier to provide us with (maintenance) drawings converted to English measurements so we could do repairs in local (American) shops. A big problem was the tolerances--when machined to the English dimensions with English tolerances, we often found that parts would not fit. (Minor rounding off and so forth led to the problem, iiuc--I was an electrical / process control engineer on the project--the mechanical engineers had the big headaches.)

As far as splines matching, I would guess that no standard American spline will mesh exactly to a metric / European spline--you'll either have to have one custom made or buy metric splines and match other places (e.g., adjust shaft sizes to handle the metric spline).