D&D Global 150T5/630R Timing Belt - T5 Section, 150mm Wide, 126T, 630mm 1.15/16" What does the T5US in

What does the T5US in 10T5/550US mean

so a 8/3V670 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

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D&D Global 150T5/630R Timing Belt - T5 Section, 150mm Wide, 126T, 630mm 1.15/16" What does the T5US inThe D&D Global 150T5 630R is a synchronous timing belt with T5 pitch profile, manufactured by D&D Global. This belt uses a standard trapezoidal tooth profile for reliable performance in general purpose synchronous drives. Constructed with Neoprene body and fiberglass cord tensile cord for precise positioning and dependable synchronous power transmission. Specifications Pitch Profile T5 Pitch 5. 0 mm Tooth Profile Trapezoidal Tooth Location Single Side