SKF pulley range nomenclature has a defined prefix of PHP. All pulleys are made to be applied to standardized belts. SKF pulleys conform to conventional basic belt part number format – ISO, BS, or DIN.
Pulleys – V-belts
The pulley range designation from SKF has the following is an example to indicate set up.
Pulleys (PHP Product Group)
Classical and trapezoidal inch pitch timing pulleys (MXL, XL, L, H, XH, XXH) are manufactured according to ISO 5294. Metric pitch series timing pulleys (T/AT) are manufactured according to DIN 7721. All SKF V-belt pulleys are manufactured to the standards ISO 4183, DIN 2211, ANSI Narrow V-belt pulley IP-22 and the ANSI Classical V-belt pulley IP-20. They are interchangeable with type SPA, SPB, SPC and SPZ. The pulleys are made from cast iron G3000 (GG ) to American standard “SAEJ431AVG96”.
Following are the requirements of G3000:
• Tensile strength = 207Mpa
• Hardness = HB 187-241
• Chemical composition C 3,1-3,4 %, Si 1,9-2,3 %, Mn 0,6-0,9 %, S = 0,15 %, P = 0,15%
After being machined, pulleys are phosphated and treated with a rustproof oil.
All pulleys are statically balanced to G6.3 according to ISO 1940. After balanced the pulleys are suitable for the linear speed of not more than 35m/s. Two Plane (Dynamic) balancing can be provided on request. SKF can issue a certificate stating that all pulleys are dynamically balanced in case of any special customer request. Standard pulley groove dimensions DIN2211/1 & BS3970 Classical V-belt pulleys | Narrow Wedge V-belt pulleys (DIN / BS / ISO) | Narrow wedge belt pulleys (RMA)
SKF sprocket range nomenclature has a defined prefix of PHS. All sprockets are made to be applied to standardized chains. SKF sprockets conform to conventional basic chain part number format – ISO, BS, or DIN.
The sprocket range designation from SKF has the following is an example to indicate set up.
Sprockets (PHS Product Group)
All SKF sprockets are manufactured according to ISO606 & ASME B29.100 standard. The sprockets are made from steel material C-45 and premium carbon steel no. 20 on hub material if welded. For some special sprockets gray cast iron HT250 or cast iron 250 material is used.
Sprockets 25T and below are hardened as standard (typically 35-40 HRC). This is only valid for sprocket teeths manufactured with steel material C-45. Surface treatment such as black oxide and zinc plating can be offered upon request.
Tolerances are machined according to DIN 8196.
All sprockets are completely deburred and protected with rustproof oil.
SKF coupling range nomenclature has a defined prefix of PHE. The coupling range is covered by limited standards, AGMA is the main standard to cover interchangeability for couplings, and spacers are covered by ANSI or ISO for lengths.
The coupling range designation from SKF has the following is an example to indicate set up.
Couplings (PHE Product Group)
SKF Flex-, Chain-, FRC-, Jaw couplings and Universal joints are manufactured according to established market standards and are fully interchangeable with other brands:
• Metric bore keyway machined according to BS 4231:Part 1 and DIN 6885
• British imperial bore keyway machined according to BS 46:Part 1 and
• American imperial bore keyway machined according to ASME B17.1
SKF Grid, Gear and Rigid couplings are manufactured according to established industrial standard, which is acceptable throughout the world. SKF Gear couplings are interchangeable, half to half, to industries standard using AGMA bolt pattern. Every coupling is protected by a specific treatment, which depends on the material or type of packaging: (1) phosphate coating, (2) blackening, (3) spray painting or (4) anti-corrosion oil.
In high output (kW) and high torque applications where vibration, shock loads and misalignment occur, SKF grid couplings are an excellent choice. The unique design of the grid and hub teeth enable these couplings to accommodate movement and stresses from all three planes, thereby reducing vibration levels by as much as 30%.
The tapered grid element is manufactured from a high strength alloy steel. The grid, which is the primary wear component of the coupling, is designed for quick and easy replacement. Unlike other couplings, the hubs and other components are not disturbed. This makes realignment unnecessary and further reduces downtime and maintenance costs.
SKF bushing range nomenclature has a defined prefix of PHF. The bushing range is covered by limited standards, but main SKF range is interchangeable with other brands.
Bushings and Hubs (PHF Product Group)
SKF chain range nomenclature has a defined prefix of PHC. All standardized chains we produce conform to conventional basic part number format –ISO, BS, or DIN.
Special chains – Leaf, Conveyor
Chains (PHC Product Group)
Depending and the type and style, SKF conveyor chains comply with international standards such as DIN 8187, ISO 1977 and BS 4116 (Part IV). Other cast and steel chains comply with the relevant industry accepted standards for performance and dimensions.