Electromagnetic clutches actuate electrically but transmit torque mechanically. They are used on a variety of pumps including hydraulics, water, vacuum, and compressors. Here are some tips to keep your clutches working properly.

1. If it is a two-piece design, make sure that the field coil portion is properly centered over the shaft. This is the portion of the clutch that mounts directly onto your pump face. The rotor portion will likely have a straight or tapered bore, so it will be naturally centered on the shaft. If the two clutch parts are not properly centered/aligned, there will be contact called rotor strike which will likely destroy your clutch very quickly.
2. Use proper tightening torque on your coil body and end bolt. This will ensure that you neither disform the components nor allow for the bolts to back off. Follow the pump OEM's recommendation and use locking adhesive when advised.
3. Give the coil proper voltage. Most pump clutches have either 12 or 24Vdc coils. Applying too little voltage may not allow full engagement or full torque. Applying too much voltage can short out the coil or overheat the clutch.
4. Keep the clutch cool where possible. Heat is the clutch’s worst enemy.
5. Keep contamination away from the clutch friction surfaces. Substances such as oil, grease, or even water can reduce the coefficient of friction on the surface, causing the clutch to slip and potentially damage itself.
6. Make sure that your wires are protected, and a good connection is maintained. A crushed or cut wire can prevent a clutch from working properly. Check for physical signs of damage. If you are uncertain of unseen damage under the insulation, use an Ohmmeter to check for continuity to the coil. Check that your connection is secure and not damaged if you suspect a problem with the clutch engaging.
7. Make sure that the clutch airgap is kept free from debris. If debris is present, it can obstruct the engagement, and sometimes cause unwanted engagement.
8. Follow the speed ratings. Clutches are rated for static torque but often used dynamically. When engaged at speed, the dynamic torque rating will be lower than the static rating. With increased rpm, the dynamic rating drops, and the ability to transfer the torque decreases.
9. Burnish your clutch if required upon installation. Your equipment OEM should advise if burnishing is required. It isn't until after the initial wear-in period (burnishing), that the clutch will be able to transfer full rated torque.
10. Make sure that your clutch hasn't been dropped or otherwise damaged. For example, a dent in the rotor and cause unwanted rubbing, excess heat, and ultimate failure.

For smaller pumps and engines, the Ogura MA Series clutches are available in torques ranging from 58 to 175 lb. ft. For pumps requiring higher horsepower, the MMC Series are rated from 200 to 1500 lb. ft. A variety of bore sizes and pulley options are available from stock.

• Long life
• Safety and convenience with remote starting
• Fuel and energy savings
• Built for outdoor operation
• Many years of proven success
• Custom designs available based on minimum order quantities
• Reduced engine load on cold weather starts
• Increased operational life of driven equipment
• Simple installation

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