covington Rociprolap Manuals

715 West Colton Avenue Redlands, CA 92374 Toll Free: (877) 793-6636 US Only Phone: (909) 793-6636 FAX: (909) 793-7641 Email: [email protected] Covington Engineering Corp. © 2013 1 ROCIPROLAP® INSTRUCTIONS 1. Install the four leveling feet with a washer, lock-washer, and nut on top. 2. Insert one steel disc in each bearing cup making sure the steel disc sets down flat. Place two nylon thrust bearings in each container. Add three or four drops of machine oil onto bearings. 3. Install the lap plate ensuring the plate rests on the nylon thrust bearings by twisting the plate back and forth. The plate should turn freely. A visual inspection will make certain. 4. Place a level on the machined surface of the lap plate. Adjust leveling feet until level. Turn level 90 degrees or one quarter turn and adjust feet until level. 5. Start the machine and let run for approximately five minutes. Check the leveling feet by placing a finger against the plastic pads and the floor. If one vibrates or bounces, loosen the nut and screw the foot down by hand. Tighten the nut securely. Observe the lap plate in operation. With no load on it, the lap plate should revolve about two to three times per minute. When lapping or polishing it is normal for the lap plate to either slow down or revolve in the opposite direction of the no load condition. Caution: Take extreme care with the wearing ring surface. This is the portion of the plate that rides on the nylon thrust bearings. It must be kept scrupulously clean and well oiled with 30 or 40 wt. oil. Never use grease. HAZARDOUS CONDITION WARNING: NEVER START THE ROCIPROLAP WITH THE LAP PLATE REMOVED. MISCELLANEOUS ADVICE • Inspect the nylon thrust bearings each time the plate is removed. If they are dirty or discolored then the thrust plate is not being kept clean. • When the plate begins to revolve faster than normal it is an indication that the thrust balls are failing or that you have too much oil on the bearings. If too much oil is not the problem (the problem usually is overly worn bearings), you must change the complete set. The nylon