SKF PHP 4-B70-SK drive pulley

SKF PHP 4-B70-SK belongs to drive pulley, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for PHP 4-B70-SK and any equivalents.

The SKF PHP line covers V-belt pulleys built for everyday power transmission duty, from small fan drives to larger process equipment. Each unit is identified by a code that tells you the belt section, the number of grooves and the pitch diameter before you even open a catalog. MR Industrial Accessories LLC supplies this series to maintenance and purchasing teams across the United States and Latin America, and can review your application data if you need a second opinion on the selection.

Reading the code is the fastest way to narrow down a replacement. Take PHP 1-B154-SK: one groove, B-section belt, 154 mm pitch diameter, SK-type bore. In PHP 2-B70-SK the leading 2 means two grooves, B is again the belt section, and 70 is the pitch diameter in millimeters. The SK suffix identifies how the pulley locks onto the shaft. Once you know this pattern, matching a pulley to a drive takes only a few seconds.

Typical duty includes fans, pumps, compressors, conveyors and machine tools, with frequent use in food processing, textiles, woodworking, chemical plants and metal fabrication. The pulley works as one half of a system, so it must be paired with a V-belt of the same section to transmit motion between shafts. Low maintenance is normal for these components, since the pulley itself has no lubricated parts.

Selection starts with four inputs: power to transmit, shaft speed, target ratio and the space available around the drive. The belt section (A, B, C, D and so on) has to match the pulley groove profile, and the groove count has to suit the load. Alignment between the two pulleys matters just as much, because misalignment shows up as belt noise and early wear. Grease or oil belongs to the shaft bearings, not to the pulley.

Interchange between manufacturers is possible when the critical dimensions line up: pitch diameter, belt section, groove count and bore type. Compare those four values against the pulley you are replacing rather than relying on a similar-looking part. If the data plate on the machine is unclear, send us the details and we will help you confirm compatibility.

Quotes are handled by part number. Send the full code through WhatsApp or email, and the team responds quickly, suggests equivalents when a direct match is not obvious, and helps you settle on the right option for the drive. For split plummer block housings, roller chains and sheaves, ask about our own manufacturing.