| Common problems associated with couplings is the wear of the male or female halve or misalignment.
Belzona allows two methods of repair by a) machining or b) forming. The choice of method will be dependent on whether one or both halves of the coupling are damaged. If only one half is damaged, it may be rebuilt by using the undamaged half as a former. If both halves are damaged, one half would be rebuilt using a machining method and then used to reform the other half. Preparation: All damaged areas are to be roughened by; a) undercutting the damaged area and rough grinding using hand held cutting/grinding machines. B) Undercutting the damaged area, leaving a rough thread pattern using machining methods. C) Undercutting the damaged area and grit blasting to give a surface finish of Sa2 ½ (near white metal finish) ensuring a minimum 3 mil. (75 micron) profile using an angular abrasive. In all cases the periphery of the repair area should be undercut to provide a square shoulder or dovetailed rebate at the extent of the damaged area. Any formers used should be treated with a minimum of 2 coats of Belzona 9411 (Release Agent). All areas to be repaired should then be thoroughly cleaned with Belzona 9111 (Cleaner/Degreaser). Perform the repair using either the Machining Method or the Forming Technique and allow the product to fully cure, before dismantling the components in order to carry out the final dressing procedure using emery cloth or hand tools. We have a multitude of videos showing how to perform many of these types of repairs on YouTube. Please let us know how we can help you repair, protect and improve your equipment.
 Stephanie Rumford
srumford@rumfordgroup.com
937-435-4650
RumfordGroup.com
 Time sure does fly, 35 years have gone by On January 11, 1980 Rumford Industrial Group was incorporated, becoming the Great Lakes Region distributor for Belzona® polymeric repair compounds and industrial protective coatings. We are honored to know that you rely on us to repair, protect and improve your machinery, equipment, buildings and structures when things stop working. We trust that you’ll allow us to continue to be a trusted business partner for the next 35 years and beyond. On behalf of our employees and associates, thank you so very much for the opportunity to be of service. Jim Rumford
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