Review on 🔩 Timken Ag Beveled Eccentric RA100RRB Bearing by Kirk Womack

These bearings were exact replacement parts for two bearings I replaced on a Star Rock grinder/buffer. The old bearings got dirty over time so the machine didn't run as smooth and I decided to replace the bearings. Engineered for agricultural applications, these Timken bearings are designed to withstand mud and water. . They have a very efficient set of seals, so effective that the new bearings are a little tight due to friction in the seals. This isn't a problem as you want the seals to be tight to keep dirt and water out. They are an excellent choice for use in wet cutting systems. Note that these particular bearings are not completely flat on the outside of the bearing. The outer metal ring actually has a very small "crown" that the Star machine needs, but that may not be what you want. After examining the old bearings at the mill I didn't really understand how the bearings stayed in the machine because the bearing itself doesn't have a set screw on the shaft sleeve. After buying new bearings, I read the instructions which helped me understand them. If you look closely at the image on the Revain product page, you will see that the bearing shaft sleeve is not actually perfectly round, but an eccentric. Each bearing also comes with a separate metal ring that fits onto the shaft next to the bearing. This collar also has an eccentric that meshes perfectly with the bearing eccentric. The collar also has a set screw to attach it to the stock as well as a second hole that isn't all the way through which confused me at first. In any case, assembly is as follows: you slide the ring onto the shaft, then slide the bearing onto the shaft, then align the eccentrics on the bearing and ring so that you slide the ring as close to the bearing as possible be able. Overlapping of the eccentrics. Then rotate the ring on the shaft but do not rotate the bearing to engage the cams (they abut each other). You then use a pick in the second hole in the bushing and hit it with a hammer to try to turn the bushing harder, which locks the two eccentrics tightly together so that the bearing and bushing are now securely connected. Finally, tighten the set screw in the ring to secure the bearing/ring assembly to the shaft. The bearings are of very good quality and once installed in the stone machine, the operation is much smoother. I expect you will be using them for many years.