Up Time Magazine - December 2008/January 2009 - (Page 30) rings should be set at 1/8 to 3/8 inches from the bottom inside edge of the ring. The faster the speed the lower the level should be. Splash lubricated gear boxes are very common where both gears and bearings are lubricated. Enough oil needs to be splashed up for cooling and for lubrication. An oil level too high will cause churning, which will over heat the oil, while a level too low will not provide proper oil cooling and lubrication for bearings and gear teeth. Spur helical, bevel and spiral bevel gears are lubricated with the gears dipping into the oil at twice the tooth depth. The OEM will provide information on the correct oil level. Worm gears consist of a steel worm and a bronze wheel with either the worm being above or below the wheel. Figure 4 illustrates a worm below the wheel, where the oil level is normally set just below the worm center line. With the worm above the wheel, as illustrated in Figure 5, the oil depth rang- es from just above the wheel tooth depth to the center line of the wheel. The oil level is dictated by the speed. The higher the speed, the lower the oil level to minimize churning. Right Place Once we have selected the right type of lubricant and the quantity to be added, we need to apply it at the proper location. Adding the wrong oil to a lubrication point is not uncommon. It will usually go undetected until a problem occurs or, with an oil analysis program, detection can be at an early stage, avoiding possible equipment damage. All lubrication points should be properly labeled as to the lubricant to be added. Lubricant manufactures provide lube tags for proper identification of the proper lubricant to be used at the lube point. A typical tag is illustrated in Figure 6. Courtesy Matthews Royal Purple Figure 3 - Slinger Ring Large pumps and process steam turbines which have journal bearings are often lubricated with the use of slinger rings as illustrated in Figure 3. The oil level with slinger ABC Lubricant Co. ISO 32 Hydraulic Oil Lubricant Tag Figure 6 - Typical Lubrication Tag. Figure 4 - Worm Gear below the wheel. Figure 5 - Worm Gear above the wheel. VIBRATION ANALYST CERTIFICATION Do YOU Hold a Badge of Recognition? Vibration Institute’s Training and Certification Program is compliant with all International Standards – ISO 18436:1 ISO 18436:2 ISO 18436:3 Requirements for Certifying Bodies Requirements for Certified Personnel Requirements for Training Bodies Call, Fax or Email the Institute for Complete Information or Visit Our Web Site: http://www.vibinst.org THE VIBRATION INSTITUTE 6262 South Kingery Highway, Suite 212 Willowbrook, Illinois 60527 Telephone: (630)654-2254 Fax: (630)654-2271 Email: vibinst@att.net december/january 2009 30 http://www.vibinst.org http://www.vibinst.org
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