Thomas
®
XTSR52 Installation and Maintenance
(Page 6 of 13)
Sizes 494-5258
CP3-002
September 2017
Supersedes 09-2016
Rexnord
5555 S. Moorland Rd., New Berlin, WI 53151-7953
Phone: 262-796-4060 Fax: 262-796-4064 www.rexnord.com
3.1 Examine the coupling assembly to assure there is no visible damage.
3.2 Clean the hub bores and shafts using lint free cloth. Remove any nicks or burrs..
3.3 The key(s) should have a close side-to-side fit in the keyway in the hub and shaft, with a slight clearance over the top when assembled
Caution: When heating hubs is required, an oven is preferred and an open flame is not recommended. If flame heating is considered
mandatory, it is important to provide uniform heating to avoid distortion and excessive temperature. A thermal stick applied to the
hub surface will help determine the hub temperature.
DANGER!
Touching hot hubs causes burns. Wear safety gloves to avoid contact with hot surfaces.
4. Straight Bore with Clearance/Slip Fit
4.1 Install the key(s) in the shaft.
4.2 Check to be sure that the set screw(s) in the hub does not protrude into the keyway or the bore. Remove or back out the set screw to provide
clearance during assembly.
4.3 Slide the hub up the shaft to the desired axial position.
4.4 If used; assemble and tighten the set screw(s) using a calibrated torque wrench to the values shown in Table 3.
Figure 4 – Mounting Hubs on Shafts
3. Hub Mounting
DANGER!
Be sure to disengage the electrical power and any other sources of potential energy before you perform work on the hub and coupling assembly.
