M-Series Installation & Maintenance Guide

Atra-Flex: Installation & Maintenance Guide

M-Series: Installation Procedure

MOUNTING OF NON SPACER, SPACER AND FLYWHEEL COUPLINGS 1. Ensure that the prime mover starting switch is locked out. 2. Shaft and bore surfaces must be clean of burrs, nicks, and dirt. 3. Place the ring on one of the shafts before mounting the second hub, or if installing a flywheel hub or spacer flange, place ring on the standard hub. 4. Mount the hubs on shafts so that the distance between the teeth is equal to the “E” dimension shown on Table 1 for A-Series or Table 2 for M-Series: (tolerances: radial, axial, and angular). Do not preload the hubs when the insert is installed. Note: On spacer coupling applications, the standard hub is installed so that the end of shaft is perpendicular with the end of the wings on the hub. The spacer flange is installed with the face of the flange flush to shaft end. 5. If hubs are to be installed interference fit, heat according to instructions. 6. When the mounting of the hubs are complete, tighten the setscrews, if required. SETTING THE “E” DIMENSION AND THE ANGULAR ALIGNMENT 1. Use a bar in equal or lesser thickness to the “E” dimension shown in Table 1 for A-Series or Table 2 for M-Series. 2. Insert the bar the depth of the teeth, and at 90 degree increments (when possible), measure with a feeler gauge or calipers the “E” dimension. 3. The difference between the minimum and the maximum measurements must not exceed the angular tolerance. SETTING THE RADIAL ALIGNMENT 1. With a straight edge applied across the teeth of both hubs, the straight edge must rest squarely or within the radial tolerances on Table 1 for A-Series or Table 2 for M-Series. This process should be done at 90-degree intervals. 2. The use of a dial indicator or laser alignment tool will allow for closer tolerances in alignment. 3. Tighten the mounting bolts and perform sections two and three again to make sure that the alignment has not changed. If the alignment is within the tolerances of Table 1 for A-Series or Table 2 for M-Series proceed to the next step. If the tolerances are not then realign the hubs. INSTALL THE INSERT 1. The insert should fit loosely (approximately 0.010 to 0.070 per side depending on the size) as it is wrapped around the teeth of the hubs. Do not force the insert into the teeth, as it will preload the coupling. For t-slot inserts, install the insert so that the t-slot is opposite the rotation of the coupling. INSTALL THE RING 1. Align the pins in the ring with the slots on the insert and slide the ring over the insert. The ring is in place when the pins are in the locator on the insert. On larger rings a soft mallet might be needed to move the ring over the insert and in place. For t-slot inserts you may then rotate the ring in the direction of the t-slots so that the pins are locked into the t-slot of the insert.