The SMC/RA series pulleys come in a variety of sizes and styles, from 2 - inch single pulleys to 4 - inch double ones. Oilite (sintered bronze) bearings are well - known for offering reliable performance at a lower cost. However, the sealed ball bearings in this product are a game - changer. They ensure top - notch efficiency and cut down on the resistance that often slows down most multi - component systems. Unlike needle bearings, sealed ball bearings are less likely to fail under misaligned loads or when the gear is twisted. The attachment hole is generously sized to fit large rescue carabiners, allowing them to rotate freely and smoothly. This pulley is UL Certified to NFPA1983 “T” Technical Use. The matched double - bend side plates are designed to prevent compression under load. It's made of high - quality aluminum, with an aluminum axle and ball bearings. Measuring 12cm x 6.35cm x 3.4cm and weighing 179g, it can handle a maximum rope size of 13mm. The sheave is a 5.08cm aluminum piece, and it has a 3 Sigma MBS of 27kN (6,070 lbf).
Using this pulley is quite straightforward. First, make sure to attach a large rescue carabiner through the attachment hole. The hole is big enough to let the carabiner turn easily, so you don't have to worry about it getting stuck. Then, thread your rope through the pulley's sheave. You can use ropes up to 13mm in size. When using the pulley, avoid applying misaligned loads or having a twisted gear as much as possible. Although the sealed ball bearings are more resistant to such issues compared to needle bearings, it's still best to use it correctly. For maintenance, keep the pulley clean. You can use a dry cloth to wipe off any dirt or debris. If it gets wet, dry it thoroughly to prevent rusting, especially since it's made of aluminum. Check the bearings regularly to make sure they're working smoothly. If you notice any unusual noise or resistance, it might be time to have it inspected or replaced.
