Review on Yonico 17702 High-Performance Carbide for Professionals by Icehot Cleversley

Relatively inexpensive bit set. They cut well and the raw edges look good. I noticed that some of the bearings seem a bit sloppy (too much clearance?). So I researched more closely. The mounting fit of the bearing on the bit is quite loose compared to the inner diameter of the bearing. (0.179" vs. 0.185"). Also the bearings are the wrong type - they are shielded and should be hermetic. As a result, the bearing lubricant will splash onto the workpiece in the first minute of use, and the bearing will fail after a few minutes of use due to lack of lubrication. Of the 70 bits, 16 have 3/8" bearings, 16 have 1/2" bearings and only 1 has 5/8" bearings. So about half of the set quickly falls out. Update - very responsive vendor. Sent new ones Bearings to replace the original bad bearing issue I rate these beats as a good buy for your money They are good for personal use in shops More expensive competitors may be justified for commercial use in shops