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SKF Xtra Power Belts

SKF Xtra Power Belts
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SKF Xtra Power Belts XP2 series V-belts designed for maximum performance

Contents The new generation of narrow wedge belts . . . . . . . . . . . 3 Selection guide for SKF XP2 Belts . . . . . . . . . . . . . . . . . . Selection procedure and formulae . . . . . . . . . . . . . . . . . . . . Service factors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Belt cross section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Correction factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Section SPZ-XP2. . . . . . . . . . . . ....

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XP2 Belts The new generation of narrow wedge belts (ISO and RMA) SKF Xtra Power Belts are designed to deliver up to 40% more power than standard wrapped belts. By replacing your existing belts with SKF Xtra Power Belts, the service life of your application can potentially be increased by up to 40%. This leads to an increased service life, less downtime, less maintenance and cost. The XP2 offers a new construction, new materials and a better overall performance than the XP series. Everything from the wrap fabric to the cord material has been upgraded to meet the markets’ demands. • The...

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Selection guide for SKF XP2 Belts Selection procedure and formulae Example: Driver: Electrical motor 45 kW, 1 450 r/min, direct online start. Driven: Fan, 550 r/min Service: 8–10 h/day Approximate center distance is 900 mm 4 Required speed ratio (lr) Divide speed of faster shaft by speed of slower shaft to get the required pulley speed ratio. 1 Service factor (C2) Service factors describe the severity of drive conditions. Refer to tables 2 and 3 on page 5. Example: Medium duty class, heavy start C2 = 1.2 5 Belt Length determination (Ld) Note: For speed increasing drives use correction...

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Service factors Table 1 Speed of prime mover Types increase ratio Speed increase ratio For speed increasing drives of Soft starts Electric motors Heavy starts Electric motors 1,00 Speed ratio 1,00 –1.24 multiply service factor by 1.00 1.00 1,24 AC-Star delta start Speed ratio 1,25 – 1.74 multiply service factor by 1.05 1.25 1,74 1,05 DC-Shunt wound DC – Series & compound wound 1,11 Speed ratio 1,75 – 2.49 multiply service factor by 1.11 1.75 2,49 Internal combustion engines with 4 or more cylinders Internal combustion engines with less than 4 cylinders Prime movers fitted with centrifugal...

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Belt cross section Diagram 1 SKF Xtra Power wrapped wedge belts Speed of small pulley [r/min] 10 000 Diagram 2 SKF Xtra Power wrapped narrow wedge belts Speed of small pulley [r/min] 10 000

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Correction factors Table 4 Arc of contact power correction factor C3 D–d CC * Arc of contact on small pulley Arc of contact correction factor C3 Table 5 Belt length correction factor C1 Belt length * D large pulley diameter d small pulley diameter CC center to center distanc

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Power ratings Section SPZ-XP2 Table 6 Faster shaft speed Rated power per belt for small pulley pitch diameter [mm] 67 Additional power per belt for speed ratio 95

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Power ratings Section SPA-XP2 Table 7 Faster shaft speed Rated power per belt for small pulley pitch diameter [mm] 90 Additional power per belt for speed ratio 125

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Power ratings Section SPB-XP2 Table 8 Faster shaft speed Rated power per belt for small pulley pitch diameter [mm] 140 Additional power per belt for speed ratio 200

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Power ratings Section SPC-XP2 Table 9 Faster Rated power per belt for small pulley pitch diameter [mm] shaft speed 224 Additional power per belt for speed ratio 335

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Power ratings Section 3V-XP2 Table 10 Faster shaft speed Rated power per belt for small pulley outside diameter [mm] inch mm Additional power per belt for speed ratio 4.12 105

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Power ratings Section 5V-XP2 Table 11 Faster shaft speed r/min Rated power per belt for small pulley outside diameter [mm] inch mm Additional power per belt for speed ratio 9.75 248

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Power ratings Section 8V-XP2 Table 12 Faster shaft speed Rated power per belt for small pulley outside diameter [mm] inch mm Additional power per belt for speed ratio 17.00 432

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SKF Xtra Power wrapped wedge belts Section SPZ-XP2 I SPA-XP2 Dimensions Pitch length Dimensions Pitch length

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SKF Xtra Power wrapped wedge belts Section SPA-XP2 I SPB-XP2 I SPC-XP2 Section Dimensions Pitch length Dimensions Pitch length

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SKF Xtra Power wrapped narrow wedge belts 3V-XP2 I 5V-XP2 I 8V-XP2 Dimensions Outside length Dimensions Outside length

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Design optimization Belt drive calculation program SKF has a calculation tool to help optimize your belt drive system. Using your data, the program will select the most efficient and economical solution for your application. The program can be found at www.skfptp.com, under belt drives. Step 1. Choose your preferred belt type out of a comprehensive list of belt profiles to start the calculation. Step 2. Fill in basic application data, such as: • Power and drive conditions • Pulleys and speeds • Belt and center distance Based on your input, the system will provide recommendations for your...

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Product solutions for belt drives Users of power transmission components have access to a single product supply source. SKF has introduced a comprehensive range of power transmission products under its own recognized world brand. As these products need to work in harmony with bearing components and systems, the SKF product range has been designed specifically for products to be compatible with each other. This means that end users have global access to both bearings and power transmission components offering cost and time savings as well as improved solutions and service. SKF Xtra Power...

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Belt tools SKF Belt Frequency Meter PHL FM 10/400 The most accurate belt tension measurement method Correct belt tension is crucial for the whole drive system, its service life and the service life of associated components such as bearings and seals. Therefore, it is important to get accurate and reliable results when measuring belt tension. The SKF Belt Frequency Meter is one of the most accurate tools available for measuring belt tension. Readings are quick, reliable and, most importantly, repeatable. The tool is extremely easy to use and minimizes the risk of errors. Wide range of...

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