Hi yes, it may be stamped motor wheel corp or just motor wheel, that is just a guess assuming that the manuf. did not change bwteen 30 and 31 which is clearly stamped motor wheel. It is approx 14 1/2 overall length, thanks for asking...........I am getting confused, this is a 31 tool and in 30 they were stamped motor wheel but 30 was a different tool.
I will look if the tool has any makers mark and get back with you