Thank you Charles for your advice. I'm still tinkering with one I bought. It ran ruff so I disassembled it and found the front bearing damaged. The bearings are Nachi. I reached out VXB a Nachi distributor and neither bearing is available. They offered replacements, but the grease speed rating of the front replacement is only 14000 rpm. The router is rated at 25000 rpm. Of course you can no longer find specifications on the old bearing. The rear bearing they offered is fine,28000 rpm. On another website I found a bearing similar to the old one and the replacement, but in the specs they mention oil and grease rating speed. My old bearing P/N's are: 6001Z (rear), and 6003NSL (front). VXB offered me, 6001ZZE and 6003-2NSE. These rating have me confused. Can one guide me in the right direction. Thank you for any help.