www.jbj.co.uk/electromagnetic-clutches.html 10 #DriveLineHarmony INDUSTRIAL CORP OGURA Electromagnetic Clutches Installation & Maintenance 3. Ball bearings: The unit is supplied with oversized dual bearings permanently sealed and lubricated ball bearings. They are designed for years of use in Marine engine bay environments. 4. Air Gaps: TheAir gap between the Rotor and the armature are set at the factory and no adjustment is possible or necessary. That said, a periodic checking of the air gaps is suggested. With each engagement of the clutch there is some wear increasing this air gap. For all 8000 series clutches, the preset factory air gap is from0.015" - 0.028". Repair or user serviceable parts: . 2. Soft Start: Ogura does offer a soft start clutch controller for applications where the rapid engagement of the clutch is undesirable. Please contact your factory representative for information. Higher speed engagements are also possible but depending on the value of the inertial loads, life may be reduced. There are no user or serviceable parts in the 8000 series clutches. We are attaching a parts list and exploded view for your reference only. Please allow only an authorized Ogura warranty service centre to repair or replace worn or damaged clutches. Use of the Surge Protector in the insulation is optional. The surge protector is not for the protection of the clutch, but for the protection of the customer's clutch control circuitry. In general, each time you turn off the clutch, there is an inductive "surge" of power (voltage) back from the clutch coil into the power circuit, switch and relay. This is a brief (tens of milliseconds) voltage that can cause arcing at the switch or relay contacts. Repeated arcing at these contacts can cause the switch or relay to prematurely fail over time. The use of a surge protector can extend the life of the switch or relay. In addition, the switch or surge "noise" can sometimes be heard as a "pop" over radios. The surge protector will eliminate or greatly reduce this noise. Installation. The surge protector needs to be connected to the clutch leads after the switch. The protector can be anywhere along the two clutch leads. Most of the time it's installed at the beginning of the clutch lead and can sometimes be connected right with the customer's terminal and terminal housing. + - Surge protector TNR 23G121K or TNR 20V121K 8000 Series Marine Clutch DC Switch or Relay { { {
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