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STEELFLEX® - Rexnord

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F A L K<br />

Engineering Data<br />

TABLE 27 — Recommended Bores for Falk Steel Coupling Hubs — Inches<br />

For shaft diameters larger than 20.000, use an average interference fit of .0005" per inch of shaft<br />

diameter with the following bore tolerances:<br />

+.003, –.000 for over 20 to 30 dia. incl.<br />

+.004, –.000 for over 30 to 40 dia. incl.<br />

Tolerances and fits comply with, or are within, AGMA 9002-A86 standard (class 1 clearance fit).<br />

Clearance Fit Interference Fit<br />

Shaft<br />

Dia. Hub Clearance<br />

Bore ference<br />

Hub Inter-<br />

Bore<br />

+.0000 +.0010 .0000 +.0005 .0000<br />

– .0005 – .0000 .0015 – .0000 .0010<br />

.5000 .5000 .4990<br />

.5625 .5625 .5615<br />

.6250 .6250 .6240<br />

.6875 .6875 .6865<br />

.7500 .7500 .7490<br />

.8125 .8125 .8115<br />

.8750 .8750 .8740<br />

.9375 .9375 .9365<br />

1.0000 1.0000 .9990<br />

1.0625 1.0625 1.0615<br />

1.1250 1.1250 1.1240<br />

1.1875 1.1875 1.1865<br />

1.2500 1.2500 1.2490<br />

1.3125 1.3125 1.3115<br />

1.3750 1.3750 1.3740<br />

1.4375 1.4375 1.4365<br />

1.5000 1.5000 1.4990<br />

+.0000 +.0010 .0000 +.0005 .0000<br />

– .0010 – .0000 .0020 – .0000 .0015<br />

1.5625 1.5625 1.5610<br />

1.6250 1.6250 1.6235<br />

1.6875 1.6875 1.6860<br />

1.7500 1.7500 1.7485<br />

1.8125 1.8125 1.8110<br />

1.8750 1.8750 1.8735<br />

1.9375 1.9375 1.9360<br />

2.0000 2.0000 1.9985<br />

+.0000 +.0015 .0000 +.0005 .0000<br />

– .0010 – .0000 .0025 – .0000 .0015<br />

2.0625 2.0625 2.0610<br />

2.1250 2.1250 2.1235<br />

2.1875 2.1875 2.1860<br />

Clearance Fit Interference Fit<br />

Shaft<br />

Dia. Hub Clearance<br />

Bore ference<br />

Hub Inter-<br />

Bore<br />

+.0000 +.0015 .0000 +.0010 .0000<br />

– .0010 – .0000 .0025 – .0000 .0020<br />

2.2500 2.2500 2.2480<br />

2.3125 2.3125 2.3105<br />

2.3750 2.3750 2.3730<br />

2.4375 2.4375 2.4355<br />

2.5000 2.5000 2.4980<br />

2.5625 2.5625 2.5605<br />

2.6250 2.6250 2.6230<br />

2.6875 2.6875 2.6855<br />

2.7500 2.7500 2.7480<br />

2.8125 2.8125 2.8105<br />

2.8750 2.8750 2.8730<br />

2.9375 2.9375 2.9355<br />

3.0000 3.0000 2.9980<br />

+.0000 +.0015 .0000 +.0010 .0005<br />

– .0010 – .0000 .0025 – .0000 .0025<br />

3.0625 3.0625 3.0600<br />

3.1250 3.1250 3.1225<br />

3.1875 3.1875 3.1850<br />

3.2500 3.2500 3.2475<br />

3.3125 3.3125 3.3100<br />

3.3750 3.3750 3.3725<br />

3.4375 3.4375 3.4350<br />

3.5000 3.5000 3.4975<br />

3.5625 3.5625 3.5600<br />

3.6250 3.6250 3.6225<br />

3.6875 3.6875 3.6850<br />

3.7500 3.7500 3.7475<br />

3.8125 3.8125 3.8100<br />

3.8750 3.8750 3.8725<br />

3.9375 3.9375 3.9350<br />

4.0000 4.0000 3.9975<br />

Clearance Fit Interference Fit<br />

Shaft<br />

Dia. Hub Clearance<br />

Bore ference<br />

Hub Inter-<br />

Bore<br />

+.0000 +.0015 .0000 +.0015 .0010<br />

– .0010 – .0000 .0025 – .0000 .0035<br />

4.0625 4.0625 4.0590<br />

4.1250 4.1250 4.1215<br />

4.1875 4.1875 4.1840<br />

4.2500 4.2500 4.2465<br />

4.3125 4.3125 4.3090<br />

4.3750 4.3750 4.3715<br />

4.4375 4.4375 4.4340<br />

4.5000 4.5000 4.4965<br />

4.5625 4.5625 4.5590<br />

4.6250 4.6250 4.6215<br />

4.6875 4.6875 4.6840<br />

4.7500 4.7500 4.7465<br />

4.8125 4.8125 4.8090<br />

4.8750 4.8750 4.8715<br />

4.9375 4.9375 4.9340<br />

5.0000 5.0000 4.9965<br />

5.0625 5.0625 5.0585 .0015<br />

5.1250 5.1250 5.1210 .0040<br />

5.1875 5.1875 5.1835<br />

5.2500 5.2500 5.2460<br />

5.3125 5.3125 5.3085<br />

5.3750 5.3750 5.3710<br />

5.4375 5.4375 5.4335<br />

5.5000 5.5000 5.4960<br />

5.5625 5.5625 5.5585<br />

5.6250 5.6250 5.6210<br />

5.6875 5.6875 5.6835<br />

5.7500 5.7500 5.7460<br />

5.8125 5.8125 5.8085<br />

5.8750 5.8750 5.8710<br />

5.9375 5.9375 5.9335<br />

6.0000 6.0000 5.9960<br />

6.2500 6.2500 6.2460<br />

6.5000 6.5000 6.4960<br />

Interference Fit<br />

Shaft<br />

Dia. Hub Interference<br />

Bore<br />

+.0000 +.0015 .0015<br />

– .0010 – .0000 .0040<br />

6.7500 6.7460<br />

7.0000 6.9960<br />

+.0000 +.0020 .0020<br />

– .0010 – .0000 .0050<br />

7.250 7.2450<br />

7.500 7.4950<br />

7.750 7.7450<br />

8.000 7.9950<br />

8.250 8.2445 .0025<br />

8.500 8.4945 .0055<br />

8.750 8.7445<br />

9.000 8.9945<br />

9.250 9.2440 .0030<br />

9.500 9.4940 .0060<br />

9.750 9.7440<br />

10.000 9.9940<br />

10.250 10.2435 .0035<br />

10.500 10.4935 .0065<br />

10.750 10.7435<br />

11.000 10.9935<br />

11.250 11.2430 .0040<br />

11.500 11.4930 .0070<br />

11.750 11.7430<br />

12.000 11.9930<br />

12.500 12.4925 .0045<br />

13.000 12.9925 .0075<br />

13.500 13.4920 .0050<br />

14.000 13.9920 .0080<br />

14.500 14.4915 .0055<br />

15.000 14.9915 .0085<br />

+.000 +.0025 .0055<br />

– .001 – .0000 .0090<br />

15.500 15.4910<br />

16.000 15.9910<br />

16.500 16.4905 .0060<br />

17.000 16.9905 .0095<br />

17.500 17.4895 .0070<br />

18.000 17.9895 .0105<br />

18.500 18.4890 .0075<br />

19.000 18.9890 .0110<br />

19.500 19.4880 .0085<br />

20.000 19.9880 .0120<br />

<br />

42 (421-110) © The Falk Corporation, 2003.

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