Laserfiche WebLink
combination grooves an A section belt will ride slightly low in the groove, while a <br />B belt will be in the normal position. Ins special deep groove sheaves, belts will <br />ride below the top of the sheave. <br />Narrow -wedge belts are purposely designed so that the top of the belt will ride <br />above the OD of the sheave. The tensile cords are located in the belt so that <br />they ride almost at the OD of the sheave. This simplifies sheave identification <br />and drive calculations. <br />No matter which V -belt section the sheave is grooved for, the belts should never <br />be allowed to bottom in the groove. This will cause the belt to loose it wedging <br />action, to slip and/or burn. Sheaves worn to the point where they allow a belt to <br />bottom should be replaced immediately. <br />Keep Belts Clean <br />Dirt and grease reduce belt life. Belts should be wiped with a dry cloth <br />occasionally to remove any build-up of foreign material. If the belts have been <br />splattered with grease and/or oil, clean them with methyl chloroform or soap and <br />water. Inflammable cleaners such as gasoline are to be avoided as a matter of <br />safety. <br />Although the belt may be of oil resistant construction, and occasional cleaning <br />will help to prolong their life. <br />Under no circumstances is the use of belt dressing recommended on a V -belt. <br />The remedial effect is only temporary. It is much better to keep the belts and <br />grooves of the drive clean. <br />Use Belt Guards <br />Belt guards protect personnel and the drive itself. They should be definitely used <br />in abrasive atmospheres to protect the drive from sand, metal chips and other <br />foreign matter. But they should be ventilated to avoid excessive heat. <br />Check them periodically for damage and for loose or missing mounting bolts. <br />These could cause the belts to come in contact with the guard and cause failure. <br />Guards alone will generally protect belts from abrasion. But where abrasive <br />materials are common — in rock processing machinery, grinders, foundries, etc. — <br />drives should be inspected frequently for excessive belt and groove wear. <br />Check for Hot Bearings <br />When the drive has been stopped for inspection, check the bearings to make <br />sure they are not running hot. If they are, it could be due to improper lubrication <br />Pcs/o&m/v-belt-maint- 1-5 <br />