L-Jaw Couplings - TB Woods

etc. from the shafts. 3. Slide one coupling hub onto each shaft, using the shaft keys where required. 4. Position the hubs on the shaft and insert the spider.

L-Jaw Couplings Installation Instructions P-5025-TBW Form 1330 Lock out / tag out the power source before proceeding to avoid unexpected starts. Failure to observe these precautions could result in bodily injury. Scan to watch! L-Jaw Couplings Installation Video https://p.widencdn.net/gdmwbs/V-0094-TBW

L-Jaw couplings consist of two hubs and one spider (elastomer or bronze insert). To install the coupling: 1. Determine the size of components being used and check the maximum RPM value in Table 1 against operating speed. 2. Inspect all coupling components and remove any protective coatings or lubricants from bores, mating surfaces and fasteners. Remove any existing burrs, etc. from the shafts. 3. Slide one coupling hub onto each shaft, using the shaft keys where required. 4. Position the hubs on the shaft and insert the spider into one of the hubs. Slide the remaining shaft and hub into the spider so that a close fit is achieved. It is usually best to have the shaft extend completely through the solid portion of the hub, and the center of the spider should be in the center of the gap between shaft ends. Once proper positioning of the two hubs and spider is achieved, securely tighten the hub setscrews.

5. Check parallel alignment by placing a straightedge across the two coupling hubs and measuring the maximum offset at various points around the periphery of the coupling without rotating the coupling. If the maximum offset exceeds the figure shown under “Parallel” in the table, realign the shafts. 6. Check angular alignment with a micrometer or caliper. Measure from the outside of one hub to the outside of the other at intervals around the periphery of the coupling. Determine maximum and minimum dimensions without rotating the coupling. The difference between the maximum and minimum must not exceed the figure given under “Angular” in the table. If a correction is necessary, be sure to recheck the parallel alignment. Table 1 SIZE



L035 L050 L070 L075

0.06 1.08 1.36 1.75

L090 L095 L099 L100 L110 L150 L190 L225 L276

2.11 2.11 2.53 2.53 3.31 3.75 4.50 5.00 6.19

ANGULAR Buna Urethane

Hytrel Bronze

31000 18000 14000 11000

0.010 0.019 0.024 0.031

0.005 0.009 0.012 0.015

9000 9000 7000 7000 5000 5000 5000 4600 4200

0.037 0.037 0.044 0.044 0.058 0.065 0.079 0.087 0.108

0.018 0.018 0.022 0.022 0.029 0.033 0.039 0.044 0.054

Parallel = .015" all spider materials except bronze Bronze = .010”

www.tbwoods.com 440 North Fifth Avenue Chambersburg, PA 17201 - USA 888-829-6637 • 717-264-7161


Form 1330


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