Profile: Brown Transmission & Bearing Co. is an industrial bearing and power transmission distributor. We have a wide range of maintenance products to help ensure reliable machine operation. Our electrical discharge detector pen (EDD pen) is a handheld instrument with a patent applied for, which detects the number of electrical discharges in electric motor bearings remotely. SKF Insocoat® bearings are designed to prevent electrical current damage. They feature a coating of aluminum oxide as an insulator on the inner or outer ring of the bearing depending on the shaft size. This coating is an effective insulating barrier, preventing electrical current from passing through the bearing to cause microscopic melting of the bearing and subsequent failure and motor stoppage. They are made to standard bearing dimensions allowing for drop-in replacement.