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Originally Posted by Tristan Lall
20° (at least, that's what the old ones were). The new gears look like they have the characteristic "sharp" teeth, so short of taking measurements, I'd definitely say that that's what they are.
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From history, I'd say you are pretty safe in saying it is a 20 Degree Pressure angle.
They typically use standard DP and pretty standard gears (no enlargements or thickening of teeth, etc.).
Joe J.