BlackStar M 4 3/4 - QD Bushing - 4 3/4" Bore Round Belts What does the S8M in

What does the S8M in 250-S8M-1160 mean

"mpn":"1760-8M-30-diesel"

Pitch Profile 8M Pitch 8 mm Tooth Profile Curved (HTD) Tooth Location Single Side Number of Teeth 118 Width 30

26 in Length 115 in (Pitch Length) Construction Synthetic Rubber

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BlackStar M 4 3/4 - QD Bushing - 4 3/4" Bore Round Belts What does the S8M inThe BlackStar M 4 3 4 is a M series qd bushing with a 4 3 4" finished bore, precision manufactured from high grade steel. QD (Quick Disconnect) bushings feature a split taper design that allows fast, easy installation and removal without disturbing other drive components. Specifications Part Number M 4 3 4 Bushing Type QD Series M Bore Size 4 3 4" Minimum Bore 1 1 4" Maximum Bore 4 3 4" Outside Diameter 6. 500" Length 6 3 4" Material Steel Approx.