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| | | KOP-FICX. | | |
| | | FAST'S® Model B Gear Couplings Limited End Float Coupling The equipment should be installed with the proper hub separation, Clef, when the motor rotor is located on magnetic center. The LEF disc part numbers are listed below. See page 157 for the standard full flex part numbers. | | |
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| | | For sleeve bearing motor applications, a FAST'S® Model B full flex coupling is supplied with an LEF disc to limit the axial float of the motor rotor, and protect the motor bearings at start-up and shut-down. The hub separation, Clef is larger than for a standard full flex, and the phenolic LEF disc is placed between the hubs at assembly, limiting the float of the motor rotor to the total LEF value shown. | | |
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| | | | | | | | | | | | | | | | | | | | | | Dimensions | LEF Disc© | | | | Coupling Size | Total LEF | Maximum Bore with Standard Key | A | B | | CLEF (Hub Sep.) | E | T (Disc Width) | Part No. | Wt. | | | | 1 | 1/8 | 1 1/8 | 4 | 2 5/8 | 1/32 | 3/16 | 1 1/4 | 1/8 | 1B LEFD | | | | | 1 1/2 | 1/8 | 1 5/8 | lo | 3 1/2 | 1/32 | 3/16 | 1 11/16 | 1/8 | 1 1/2B LEFD | | | | | 2 | 1/8 | 2 1/8 | 6 | 4 5/16 | 1/32 | 3/16 | 2 3/32 | 1/8 | 2B LEFD | | | | | 2 1/2 | 1/8 | 2 3/4 | 7 | 5 1/4 | 1/32 | 3/16 | 2 9/16 | 1/8 | 2 1/2B LEFD | | | | | 3 | 3/16 | 3 1/8 | 83/8 | 61/2 | 3/64 | 9/32 | 35/32 | 3/16 | 3B LEFD | | | | | 3 1/2 | 3/16 | 33/4 | 9 7/16 | 73/4 | 3/64 | 9/32 | 325/32 | 3/16 | 31/2B LEFD | | | | | | | | | | | | | | | | | | | |
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| | | © All finish bores and keyways per AGMA 9002-A86 commercial standard tolerances. Each clearance bore includes one setscrew over keyway. © LEF Discs are used only in close coupled applications. One disc is required per | | |
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| | | SPACER LENGTH | | |
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| | | Full-flex spacer couplings are used for 4 bearing installations with extended shaft separations. Tabulated here are spacers for industry standard shaft separations, CL. Type SB shrouded bolt spacers for standard shaft separations are normally in stock. Type EB spacers and other lengths are manufactured to order. Spacer length, L, is calculated by subtracting the standard full-flex, close coupled gap, C, from the shaft separation, CL. | | |
| | | SHAFT SEPARATION C. | | |
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| | | J0] TYPE EB SPACER [Q (EXPOSED BOLT) | | |
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| | | L = CL - C | | |
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| | | (full-flex, close coupled) | | |
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| | | TYPE EB ACCESSORY SE" (2 SETS REQUIRED) | | |
| | | TYPE SB OPTION (SHROUDED BOLT) | | |
| | | LEF spacer couplings are available, but are nonstock. | | |
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| | | Stock Spacer Part Numbers Type SB (Shrouded Bolts) | | |
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| | | | | | | | | | | | | | | | | | | | | | | | Shaft Separation | | | | | | | | Coupling Size | 3 1/2" | 4 3/8" | 5" | 7" | 10" | | | | Part No. | Wt. | Part No. | Wt. | Part No. | Wt. | Part No. | Wt. | Part No. | Wt. | | | | 1 | 1B SB SPR350 | 3 | — | — | — | — | — | — | — | — | | | | 1 1/2 | 1 1/2B SB SPR350 | 4 | 1 1/2B SB SPR438 | 4 | 1 1/2B SB SPR500 | 5 | — | — | — | — | | | | 2 | 2BSB SPR350 | 6 | 2BSB SPR438 | 7 | 2BSB SPR500 | 7 | 2B SB SPR700 | 9 | — | — | | | | 2 1/2 | — | | — | — | 21/2BSB SPR500 | 9 | 21/2BSB SPR700 | 11 | — | — | | | | 3 | | | — | — | 3BSB SPR500 | 13 | 3BSB SPR700 | 16 | — | — | | | | 3 1/2 | | | — | — | — | — | 31/2BSB SPR700 | 19 | 31/2B SB SPR1000 | 24 | | | | | | | | | | | | | | | | | | |
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