Hvert líkan af þríhyrningsbeltinu tilgreinir hlutastærð þríhyrningsbeltisins. Hlutastærðin af gerð þríhyrningsbeltis er: efsta breiddin er 13 mm og þykktin er 8 mm; Hlutastærðin á þríhyrningsbelti af gerð B- er: efsta breiddin er 17 mm og þykktin er 10,5 mm; Hlutastærð C-laga þríhyrningsbeltis er: efsta breiddin er 22 mm og þykktin er 13,5 mm; Hlutastærð D-laga þríhyrningsbeltis er: efsta breiddin er 21,5 mm og þykktin er 19 mm; Hlutastærð E-laga þríhyrningsbeltis er: efsta breiddin er 38 mm og þykktin er 25,5 mm. Samsvarandi mál (breiddarhæð): O (10 6), a (12,5 9), B (16,5 11), C (22 14), D (21,5 19), e (38 25,5).
The recommended groove angles of different types of pulleys in different diameter ranges are as follows: when the diameter range of O-type pulley is 50mm ~ 71mm, it is 34 degrees; 36 degrees at 71mm ~ 90mm and 38 degrees at > 90mm; Type a pulley is 34 degrees when the pulley diameter ranges from 71mm to 100mm and 36 degrees when the pulley diameter ranges from 100mm to 125mm; > 38 ° at 125mm; B-type pulley is 34 degrees when the pulley diameter ranges from 125mm to 160mm; 36 degrees for 160mm ~ 200mm and 38 degrees for > 200mm; C-type pulley is 34 degrees when the pulley diameter ranges from 200mm to 250mm, 36 degrees when 250mm to 315mm, and 38 degrees when > 315mm; When the diameter range of D-type pulley is 355mm ~ 450mm, it is 36 degrees, and when the diameter range is > 450mm, it is 38 degrees; Type E is 36 degrees when it is 500mm ~ 630mm and 38 degrees when it is >630 mm.
