Kop-Flex Coupling Installation

Turn off the power to the equipment to which the coupling will be installed.

Apply Kop-Flex KSG coupling grease to the coupling’s sleeve teeth. It is rated for couplings that operate above 3,500 RPM and is recommended by Kop-Flex. If you use different grease, it must meet a set of minimum requirements. Use a grade NLGI #1 grease that has a minimum oil base viscosity of 3,000 SSU at 100 degrees F and 160 SSU at 210 degrees F, with a minimum dropping point of 190 degrees F. It must have a minimum base oil content of 87 percent and contain rust and oxidation additives, as well as an E.P. inhibitor. Use four-ball wear grease, ASTM D-2266, with a maximum of .500 millimeters and a K36 factor of .33.

Apply antigalling lubricant to the shaft if you are installing the coupling on a shaft with a keyed connection. If you install the coupling onto a keyless shaft, skip this step.

Insert a place ring onto the shaft. Slide the sleeve teeth over the shaft.

Insert the keys far enough into the shaft keyways so there is clearance on the top and bottom. This is only to be done on a shaft with a keyed connection. If you install the coupling onto a keyless shaft, skip this step.

Wipe the shaft and the hub with a clean cloth. Apply antigalling lubricant to a straight bored hub. Do not apply antigalling lubricant to a taper bored hub.

Insert the hub into an industrial oven and raise the temperature of the hub to 300 degrees F. Remove the hub when it is significantly larger than the shaft in diameter. Let the assembly cool.

Slide a gasket onto the shaft only if you are installing a model of Kop-Flex coupling with a bolt end. Slide the hub onto the shaft so the side of the hub is flush against the end of the shaft. Secure the hub with the appropriate bolts, which should already be attached to the equipment. Use an adjustable wrench to tighten the bolts. If you are installing a tapered hub, hand tighten the hub onto the shaft and tap it with a rubber mallet until it is in the appropriate position on the equipment. Lock the retainer to secure the tapered hub in place.

Wipe the flange faces on the coupling with a clean cloth.

Lubricate the coupling with Kop-Flex KSG coupling grease. Pour the lubricant into the top lube hole until you see it flow through the bottom lube hole.

Place a gasket between each set of flanges only on Kop-Flex spacer couplings. Push the sets of flanges together on all models. Twist the flanges so the lube holes are 180 degrees apart (they should be on opposite sides) if you install a Model B Kop-Flex coupling and 90 degrees apart if you install a fast forged steel coupling.

Align the gasket with the flange bolt holes. Insert the bolts. Slide a washer onto each bolt. Twist a nut onto the threaded end of each bolt. Tighten the nuts with a torque wrench to the recommended torque, which is found in the owner’s manual for each coupling.