The Timken Company - Inch Accessories - Locknut and Lockplate

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The chart below shows dimensions for locknuts and lockplates used in the mounting of straight bore bearings on shafts.
Other dimensions and tolerances related to shaft configurations are also shown.
Dimensions are presented according to bearing bore size and are applicable to bearings in the various series (e.g., 222,223 etc.).

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Unit of Measure

Items	N 048-P 48 Inch Accessories - Locknut and Lockplate	N 052-P 52 Inch Accessories - Locknut and Lockplate	N 056-P 56 Inch Accessories - Locknut and Lockplate	N 060-P 60 Inch Accessories - Locknut and Lockplate	N 064-P 64 Inch Accessories - Locknut and Lockplate
Bearing Bore	N/A 240 mm	N/A 260 mm	N/A 280 mm	N/A 300 mm	N/A 320 mm
Major Diameter	N/A 239.83 mm9.442 in	N/A 258.88 mm10.192 in	N/A 279.5 mm11.004 in	N/A 299.34 mm11.785 in	N/A 319.07 mm12.562 in
Threads No. per Inch	N/A 6
Relief Diameter A	N/A 233.71 mm9.201 in	N/A 252.76 mm9.951 in	N/A 273.38 mm10.763 in	N/A 293.22 mm11.544 in	N/A 312.95 mm12.321 in
Diameter S-3	N/A 233.36 mm9 3/16 in	N/A 252.41 mm9 15/16 in	N/A 273.05 mm10 3/4 in	N/A 292.10 mm11 1/2 in	N/A 312.74 mm12 5/16 in
L¹	N/A 37.29 mm1.468 in	N/A 38.89 mm1.531 in	N/A 41.28 mm1.625 in	N/A 42.85 mm1.687 in	N/A 45.24 mm1.781 in
H²	N/A 11.13 mm0.438 in
S³	N/A 28.6 mm1.125 in	N/A 30.2 mm1 3/16 in	N/A 31.8 mm1.250 in	N/A 34.9 mm1.375 in	N/A 36.5 mm1 7/16 in
C₁	N/A 290.65 mm11.443 in	N/A 309.7 mm12.193 in	N/A 330.33 mm13.005 in	N/A 360.5 mm14.193 in	N/A 381.13 mm15.005 in
D	N/A 34.39 mm1.354 in	N/A 35.97 mm1.416 in	N/A 38.35 mm1.51 in	N/A 39.95 mm1.573 in	N/A 42.32 mm1.666 in
G	N/A 21.84 mm0.86 in	N/A 21.84 mm0.86 in	N/A 24.89 mm0.98 in	N/A 24.89 mm0.98 in	N/A 24.89 mm0.98 in
H₁⁴	N/A 9.78 mm0.385 in	N/A 9.78 mm0.385 in	N/A 9.78 mm0.385 in	N/A 12.95 mm0.51 in	N/A 12.95 mm0.51 in
R	N/A 203.2 mm8 in	N/A 228.6 mm9 in	N/A 228.6 mm9 in	N/A 254 mm10 in	N/A 254 mm10 in
F	N/A 43.26 mm1.703 in	N/A 44.85 mm1.766 in	N/A 47.23 mm1.859 in	N/A 50.01 mm1.969 in	N/A 52.39 mm2.063 in
Locknut	N/A N 048	N/A N 052	N/A N 056	N/A N 060	N/A N 064
Lockplate	N/A P 48	N/A P 52	N/A P 56	N/A P 60	N/A P 64
¹ Tolerance -0 to + 0.4 mm (-0 to +1/64 in) ² Tolerance -0 to + 0.4 mm (-0 to +1/64 in) ³ Tolerance -0 to + 0.4 mm (-0 to +1/64 in) ⁴ Tolerance ±0.25 mm (±0.010 in)