LENGTH CODING SYSTEM: When the code number 50 is shown on the cello-tape affixed on each Poly V-Belt, this indicates that the actual length coincides with the nominal length printed on the belt. Each deviation of 2.5 mm from the nominal length is represented by one unit. For instance, a V-belt with size 100" coded 50 is exactly 100 inches inside length. If the code is 49, then it is 99.9" and if the code is 51, then it is 100.1" inside length.

MATCHED SETS: The question of matched sets arises in case of multi V-belt drive as the length of V-belt should be matched in order to obtain even distribution of load. A 'Matched Set' is simply a set of such belts, the length of which are within the specified limits, so that these can be used together.

The table as shown depicts the permissible length deviations in consecutive grading numbers marked near the size code which represents the exact length measured under specified operating tensions.

Belt Drive V Section	Belt Pitch Length Exceeds Inside Length By (mm)	V Belt Outside Diameter Exceeds Pitch Diameter By (mm)		Nominal Inside Length (mm) of Machine Belt	Range (inches) of V Belt	No. of consecutive grading number (s) to be used to make a matched set
A B C D E SPZ SPA SPB SPC	36 43 56 79 92	6.6 8.4 11.4 16.2 19.3 4.0 6.0 7.0 9.6		457 to 1676 1702 to 2286 2311 to 3048 3073 to 4572 4597 to 9093 9119 and above	18-66 67-90 91-120 121-180 181-358 359 and above	1 2 3 4 5 6

Power Transmission V-Belts Product Specification

Normal Horse Power H.P.	Speed of Faster Shaft i.e. Motor Speed RPM					V-Belt Section	Permissible Min. Belt Pulley Pitch Diameter mm                  inch		Recommended Min Belt Pulley Pitch Diameter mm                inch
	720 and below	900	1200	1800
½ to 11/2 2 to 3 5 10 15 20 25 to 30 40 50 60 75	A A or B A or B A or B C C C D D D D	A A or B A or B A or B B or C C C C or D C or D C or D C or D	A A or B A or B A or B B or C C C C or D C or D C or D C or D	A A or B A or B A or B B B or C C C C or D C or D C or D		A B C D E SPZ SPA SPB SPC	75 125 200 315 500 - - - -	3 5 8 12.6 20 - - - -	95 145 225 350 550 63 90 160 224	3.8 5.8 9 14 22 2.5 3.6 6.4 9.0

1 KW = H.P. X 0.746

Please note that with smaller pulley diameter than those recommended, the life of belt is reduced considerable and also the transmitting power decreases. It is necessary to ensure that at least belts run on pulleys that are not below the permissible minimum diameter for each section.

Table 3 Standard V Belt Pulley DIMENSIONS

V Belt Grove Cross-Section	Pulley Pitch Diameter dp (mm)	Groove Angle A Degree + 0.50	Minimum Top width of groove g(mm)	Minimum Groove depth below outside diameter hg (mm)	Centre to Centre of grooves Sg (mm)	Edge of Pulley of First Groove Centre (mm)
SPZ A SPA B SPB C SPC D E	Upto 80 Over 80 Upto 118 Over 118 Upto 190 Over 190 Upto 315 Over 315 Upto 475 Over 475 Upto 630 Over 630	34 38 34 38 34 38 36 38 36 38 36 38	9.7 9.9 13.0 13.3 16.6 16.9 22.7 22.9 32.2 32.6 38.3 38.6	11.0 13.8 17.5 23.8 23.8 28.0 33.0	12 +0.3 15 + 0.3 19 + 0.4 25.5 + 0.4 25.5 + 0.5 37.0 + 0.6 44.5 + 0.7	8.0 + 1.0 10.0 + 2.0 -1.0 12.5 + 2.0 -1.0 -1.0 -1.0 24.0 + .0 -1.0 29 + 4.0 -1.0

When the Pulleys are to be used for V-belt sections, A,B or C only, dimension hg may be reduced by 20%

Universal urges to use standard premium quality Vee-Belt Pulley either conventional type or new generation quick-fit taper lock Pulley bush type manufactured to drag better mileage from V-Belts drive. Auto Fan Belts, Variable Speed Belts also manufactured.

Vee Belt Information To Be Supplied With Enquiry or Order

(I) Section (II) Size in inches or mm (III) Quantity in nos.

Belt Drive Rubber Design Formulae

 

Narrow and Cogged V Belts Information To Be Supplied With Enquiry or Order

1. Section , Top width x Thickness
2. Size , Length inches I/C or Pitch Length - MM
3. Quantity , nos.

Disclaimer: Information's, written and verbal are provided by HIC, relative to its products which it determines to be reliable & no liabilities of whatsoever nature in regards to its uses. The purchaser of UNIVERSAL brand industrial products should determine for itself the suitability of such products.