size belts has proved more difficult than I had imagined.
To recap, K-belts are common in the small drill presses which are ubiquitous
in most tool stores. Not so the belt replacements. The crossection is 5/16"
width and 1/4" (or 7/32") depth with the usual angle of 38 degrees.
The nearest I found is this belt by Gates:
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which, however, has an angle of 60 degrees.
The question then is: Is this belt likely to perform satisfactorily in a
sheave designed for a 38 degree belt?