Epoxy Application Guide - Loctite.ph

Repair Applications5. Using reinforcing mesh, such as fiberglass or wirescreening, lay a strip of the reinforcement material overthe application and imbed the tape into the epoxy.(See figure 12)SHAFT REPAIRSLoctite ® epoxies can often be used to repair damaged orscored shafts. In some cases, however, the repair may notprovide long-term service and should not be made.Repairs are not recommended to the following shafts:¥ Any repair on an area subject to frictional heat such as on ashaft worn by mechanical packing.¥ The worn area under a bearing, bushing or mechanical sealthat exceeds its width.¥ Shafts under 1/2" (13 mm).THE SHAFTSince the area to be repaired needs to be machined, thestandard preparation procedures are not used. (See figure 14)Figure 12. Reinforce the repair by applying tape over the epoxy.6. Apply another 1/16" to 1/4" (1.5 – 6 mm) of epoxy over thereinforced mesh and smooth out the epoxy. To preventlifting of the repair, be sure to feather the edges in keepingwith the contour of the repaired equipment.(See figure 13)Figure 14.Undercut the worn area according to the following guidelines:Shaft DiameterDesired Undercut1/2 to 1" (13 – 25 mm) 1/16" (1.5 mm)1 to 3" (25 – 75 mm) 1/8" (3 mm)1. Using a lathe, undercut to the desired depth. If the shaftis already worn to the recommended depth, go to thenext step.Dovetail the ends of the worn area to lock the applicationinto place and to serve as a guide when repairing.(See figure 15)Figure 13. Over-coat the epoxy/tape application with anothercoating of epoxy.7. To speed the cure, heat the repair area with a heat gun orheat lamp. Never expose epoxy to an open flame.Figure 15. Dovetailing provides mechanical lock for epoxy.Epoxy Application Guide9