Timken BH-1610
Koyo BH-1610 Needle Roller Bearing, Full Complement Drawn Cup, Open, Inch, 1" ID, 1-5/16" OD, 5/8" Width, 5200rpm Maximum Rotational Speed
https://www.amazon.com/Koyo-BH-1610-Bearing-Complement-Rotational/dp/B007EDTXS6
Bearings for RL1050 are different. I have the part # for that too if you need it.