Eaton Airflex WCB Series Installation, Operation And Maintenance Manual

TABLE 4Fastener Description and Assembly Torque - ft-lb (Nm) (Lubed)Fastener 8WCB 14WCB 18WCB 24WCB 36WCBItem #18 Description 1/2-13NC-3 3/4-10NC-3 3/4-10NC-3 1 1/8-7NCGr. 81 3/8-6NCGr. 8Torque 60 (81) 150 (203) 150 (203) 500 (677) 750 (1016)Item # 5 Description #10-24NC 1/4NC2 5/16-18NC 5/16-18NC 3/8-16NC2Torque 5 (7) 12 (16) 25(31) 25(31) 40(54)MountingScrewDescription 1/2-13NC-2Gr.85/8-11NC-2Gr. 85/8-11NC-2Gr. 85/8-11NC-2Gr. 8 1-8NC2 Gr. 8Quantity 4 6 10 10 14Torque 70 (95) 150 (203) 150 (203) 150 (203) 660 (895)2.1.2 Figures 2 and 8 and Table 1 show the mount-ing dimensions for the tensioner to themachine frame or reaction bracket. Note thata male or female register may be used.2.2 Alignment2.2.1 For proper operation and service life, thetensioner reaction member must be aligned tothe shaft w ithin the limits show n on Table 3.Proper alignment is necessary to ensurethat the friction discs track properly.Improper alignment will result inexcessive wear to the friction materialand its mating surfaces, the gear andsplined bore of the friction discassembly. See Figure 9.2.3 Mounting2.3.1 The WCB must be mounted to a clean, rigidsurface w ith hardened flat w ashers andscrew s of the grade, quantity, and size and tor-qued to the values identified in Table 4 foreach WCB size. Mounting to a rigid surfaceminimizes any deflection during operation andensures that the friction discs w ill trackproperly on the copper w ear plates.Correct Track Incorrect TrackFig. 9TABLE 2"A" Dimension on Figure 1 - in. (mm)Size Single Dual Triple Quad8WCB 1.00(25.4)1.38(35.0) N/A N/A14WCB 1.06(26.9)1.69(42.9) N/A N/A18WCB 1.25(31.8)1.25(31.8)0.75(19.1) N/A24WCB 1.38(35.1)1.00(25.4)0.63(16.0)1.38(35.1)36WCB 1.50(38.1) N/A 2.38(60.5)2.38(60.5)TABLE 3Alignment RequirementsSizeConcentricity ofShaft and BrakeIn. (mm)Perpendicularity ofMounting Flange(2)to Shaft - In. (mm)8WCB 0.005 (0.13) 0.005 (0.13)14WCB 0.010 (0.25) 0.007 (0.18)18WCB 0.010 (0.25) 0.010 (0.25)24WCB 0.010 (0.25) 0.012 (0.30)36WCB 0.010 (0.25) 0.019 (0.48)Perpendicularity referenced to outside diameter ofmounting flange from shaft center line (TIR).PDF FORMAT 11 ©Copyright Eaton Corp., 1995. All rights reserved.