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Power Transmission Dayco Offers a Full Line of Power Transmission Belting. Product Constructions: Wrapped, Raw-Edge, Synchronous, Poly-Rib, Double Angle, Urethane, Specialty V-Belts Timing Belts Pulleys & Bushes Drive Designs Automotive Belts Products

Power Transmission Products V-belts Chains Gears Timing Belts

V-Belts Economical means to transmit power from one point to another Wedging effect created by side wall contact on pulley grooves Clean Slip characteristics.

V-Belt Construction Tension Section Compression Section Cords Both wrapped and raw edge are manufactured with these components.

Wrapped V-BeltsV

Wrapped V-beltsV 1 Protective fabric cover impregnated with rubber 2 Tension section, synthetic rubber compounded to stretch as belt bends 3 Cords, synthetic fibre cords carry the power and minimise stretch 4 Compression section, synthetic rubber compound to support cords evenly and compress as belt bends.

Wrapped Belt Applications Drives when slippage is a requirement Agricultural Lawn & Garden Low Torque Drives. Industrial

Raw Edge V-BeltsV

Raw Edge V-BeltsV 1 Tension section, specially woven dayflex stress-relived fabric 2 Cords, synthetic high modulus cord to carry high loads with minimal stretch 3 Compression Section, Stiflex rubber compound and precision moulded cogs increase flexibility and supports cords 4 Raw Edge Side Walls, provide uniform anti-slip surface, greater flexibility and allow more cord.

Raw Edge Belt Applications Drives considered to be heavy duty and product performance is critical Drives where slippage is not required. Drives with limited space Not suited to drives requiring slippage Compressors. A/cond, crushers, pumps, etc.

Advantages Raw Edge v Wrapped Performs up to 4% more efficiently Generates less heat build up Allows smaller pulley diameters Increased power ratings Provides longer life.

Disadvantage Raw Edge v Wrapped Cannot be used on clutching applications Severe shock and intermediate loads can cause belts to jump.

Belt Styles & Cross Sections

Blue Label Standard world wide cross sections A,B,C,D & E General purpose applications.

Cross Sections

Part Number Explanation B50 B - Cross Section 50 - Nominal Inside circumference in inches

Gold Label Raw Edge High performance applications AX, BX, CX & DX Raw edge construction Energy saver.

Cross Sections

Part Number Explanation AX50 A - Cross Section X - Denotes Raw Edge Construction 50 - Nominal Inside circumference in inches 50

Power Wedge V-BeltsV

Power Wedge V-BeltsV High performance applications Also known as space savers SPZX(3vx), SPAX, SPBX(5vx), SPCX, SPPX(8vx) Deep groove.

Cross Sections

Part Number Explanation (metric) SPBX2000 SPB - Cross Section Dimensions X - Denotes Raw Edge Construction 2000 - Belt pitch length in mm

Part Number Explanation (Imperial) 5VX1400 5V - Cross section dimensions X - Denotes raw edge construction 1400 - Belt pitch length in inches 140.0

Power Wedge V-beltsV metric - imperial SPZX 3VX SPAX - SPBX 5VX SPCX - SPPX 8VX

Banded Belts

Part Number Explanation 4RBP112 5R3VX1000 4R - Number of ribs BP - B section plain 112- Nominal inside circumference inches 112 5R - Number of ribs 3VX -3V cross section raw edge. 1000 - Pitch length in inches 100.0

Special Construction

Part Number Explanation BK90 5L500 B - B cross section K - Aramax Construction 90 - Nominal inside circumference 90 5L - Cross section & construction style 500- Nominal outside circumference in inches 50.0

Poly Rib

Part Number Explanation 2130M24 2130 - Belt pitch length in inches 213.0 M - Belt Cross Section 24 - Number of Ribs

Variable Speed

Part Number Explanation 2230V275 22 30 - Belt top width 1/16 of inch 22/16 - Side wall angle 275 - Belt pitch length in inches 27.5

Double Angle

Part number Explanation CC360 CC - Belt Cross Section 360 - Belts nominal inside circuference in inches, 360

Market Dilemma Raw edge belts offered higher power ratings, greater efficiency levels but was not suited to many applications Wrapped belts offered low power ratings, were conducive to slip and when raw edge was not suited wrapped was the only option.

Super II

Super II V-BeltsV Introduced in 1992 Revolutionised the V-belt industry Introduced a 3rd construction style to the market Designed specifically for the toughest of V-belt applications Combined the advantages of raw edge and wrapped belt constructions.

Reasons For Super II Development To be introduced for those toughest of belt applications. Drives with heavy torque, high power loads, back side idlers and extreme shock loads Drives in which wrapped belts were the users only option and product performance is a criteria.

Super II Construction Centre placement of polyester cord 100% Neoprene rubber compound loaded with Stiflex fibres Horizontal placement of neoprene - impregnated fabric plies.

Cross Sections

Part Number Explanation B50S B 50 S - Belts cross section - Nominal inside circumference - Denotes construction style

Super II V-Belt Greater Strength* from Centrally Placed Polyester Cord Longer Life* on Severe Drives Better Grip* with Controlled Slippage Greater Flexibility* * Compared to Wrapped Belts

Advantage of Super II Greater Strength The innovated centre placement of the load carrying cord provides better belt balance and greater strength than wrapped construction. Stronger cords makes it more resistant to stretching. Longer Life Developed for severe drives and will out perform conventional wrapped belts on normal applications Tests show the Super 11 belt last far longer than conventional wrapped belts on the toughest of applications Better Heat Dissipation Neoprene rubber only found previously in higher priced v-belts dissipates heat more easily. The lower cord placement allows the belts to run cooler with less internal generated heat (hysteresis).

Advantage of Super II Better Grip/Controlled Slippage Unique side wall construction offers optimal gripping characteristics. Raw edge construction provides improved grip during normal drive loads to enhance efficiency. Fabric layers horizontal placement give the belt controlled slippage for high/intermediate load situations Greater Flexibility. Multiple neoprene - impregnated fabric plies top and bottom, support the load carrying centre cord more evenly and resist flex fatigue on drives using small diameter pulleys and back side idlers.

Tough Belt Applications Suited for Super 11 High Torque Drives gas compressors, mixers, oil field pumping units, conveyors. Extreme Shock Loads wood chippers, mulchers, rock crushers, shaker screens. Back Side Idler. all applications

Super II: the Problem Solver Solves heavy torque problems with its specially treated, more durable polyester cord that resist stretching Solves extreme shock load problems with combination raw edge and fabric side wall construction that allows for controlled slippage Solves belt cracking problems due to heat build up, with a special 100% neoprene rubber compound. Dissipates heat better Solves small pulley and back side idler problems with a centre cord that flexes more easily in either direction.

V-Belts in General They are an economical method of transmitting power They are clean, quiet and efficient They have smooth running and starting characteristics They cover an extremely wide range power ratings and driven speeds They dampen vibration between driving and driven machines They act as a safety fuse They require minimal maintenance They should not be used on automated equipment.

Troubleshooting Care & V- Belt Care Maintenance

Troubleshooting Care & Maintenance Pulley Care

V-Belt Maintenance V-belts should be given a run in period of 24-48 hours to allow the belts to seat in the pulley grooves and spread power evenly across the drive Tensioning should be set at maximum level when new and adjusted if necessary after run in period. Pulley wear and misalignment should be checked upon belt installation.

V-Belt Matching One of the most talked about issues within the V-belt market The many manufacturers throughout the world all have different matching systems. All must meet a standard and the most common standards are RMA & ISO. Common Matching Names Chek-Mate, V80, S=Cplus, Matchmaker, Matchfree, etc.

V-Belt Matching Prior to the early 1980 s manufacturers used a complex numbering system (48, 49, 50, 51, 52, etc) 50 was the ideal length for that particularly belt size Numbers less than 50 were shorter and number greater than 50 were longer.

V-belt Matching Dayco introduced Chek-Mate Chek-mate a one match belt system for all belts of the same size. In all cases Chek-Mate holds the belt length in closer tolerances than the RMA matching tolerances. Belts made under Chek-Mate Blue Label, Super Blue Ribbon, Gold Label, Power Wedge, and Super II.

Dayco Chek-Mate Tolerances v RMA Matching Limits Standard Length Chek-Mate RMA < 1270 2.03 3.81 1371-2895 3.05 7.62 2921-5580 5.08 11.40 5613-16764 8.12 15.24 > 16789 12.19 22.86 (All Measurements shown in MM)

V-Belt Measurements Belt Measurements Belts are measured by their effective length. The effective length depends on the position it rides in the pulley grooves. The effective length can be determined by placing the belts on a measuring device. The effective length is calculated by adding the effective circumference of one pulley and twice the measured center distance.