Ball Bearings Catalog - Timken

SMN-S HEAVy SERIES
• Construction permits inner assembly to swivel in the outer
aligning ring.
• Unrestricted self-alignment is achieved, allowing the inner ring
to become square and true with the shaft and assembly.
• The external S-Ring is uniquely ground and closely matched
to its respective outer bearing ring so that the S-Ring of one
bearing will not fit the outer ring of another bearing.
• Has the basic 300 Series load capacities.
• Bearings are not prelubricated.
Suggested shaft tolerances: 1 3 /16” - 1 15 /16”, nominal to -.013 mm, -.0005”;
2” - 3 15 /16”, nominal to -.025 mm, -.0010”.
SMN-S Heavy Series
TO ORDER, SPECIFy BEARING NUMBER FOLLOWED By "+ COL". Example: SMN103KS + COL.
Wide Inner Ring
Bearing Collar Basic Bore (1) O.D. Ring S G F L d1 B2 B1 Brg. & Static Extended
Number Number Outer d D Widths Collar Wt. Load Dynamic
Ring Rating Load
Size B C Co Rating
Inner Outer CE
mm mm mm mm mm mm mm mm mm mm kg N N
in. in. in. in. in. in. in. in. in. in. in. lbs. lbs. lbs.
SMN103KS SN103K 306 1 3 /16 80 36.51 19 17.5 19.1 43.23 4.0 49.2 17.5 50.0 0.654 1.44 15600 33500
3.1496 1 7 /16 0.748 11 /16 3 /4 1.702 5 /32 1 15 /16 11 /16 1 31 /32 3550 7550
SMN107KS SN107K 307 1 7 /16 88 38.10 21 18.30 19.8 48.95 4.0 55.6 17.5 51.6 0.849 1.87 21200 40500
3.4646 1 1 /2 0.8268 23 /32 25 /32 1.927 5 /32 2 3 /16 11 /16 2 1 /32 4750 9150
SMN108KS SN108KT 308 1 1 /2 100 41.28 23 19.80 21.4 55.5 4.8 63.5 20.6 57.2 1.344 2.96 26100 49000
3.9370 1 5 /8 0.9055 25 /32 27 /32 2.185 3 /16 2 1 /2 13 /16 2 1 /4 5850 11000
SMN111KS SN111K 309 1 11 /16 110 42.86 25 19.80 23.0 62.05 4.8 69.9 20.6 58.7 1.693 3.73 31600 58500
4.3307 1 11 /16 0.9843 25 /32 29 /32 2.443 3 /16 2 3 /4 13 /16 2 5 /16 7100 13200
SMN115KS SN115K 310 1 15 /16 120 49.21 27 24.6 24.6 68.78 4.8 76.2 22.2 66.7 2.147 4.73 37900 68000
4.7244 1 15 /16 1.063 31 /32 31 /32 2.708 3 /16 3 7 /8 2 5 /8 8500 15300
SMN203KS SN203K 311 2 3 /16 130 55.56 29 27.8 27.8 75.01 4.8 82.6 22.2 73.00 2.769 6.1 43600 80000
5.1181 2 3 /16 1.1417 1 3 /32 1 3 /32 2.953 3 /16 3 1 /4 7 /8 2 7 /8 9800 18000
SMN207KS SN207K 312 2 7 /16 145 61.91 31 31 31 81.53 6.4 88.9 23.8 79.4 3.405 7.5 51700 90000
5.7087 2 7 /16 1.2205 1 7 /32 1 7 /32 3.21 1 /4 3 1 /2 15 /16 3 1 /8 11600 20400
SMN211KS SO211K 314 2 11 /16 165 68.26 35 34.10 34.1 94.7 6.4 101.6 27.0 92.1 5.185 11.42 66800 116000
6.4961 2 11 /16 1.378 1 11 /32 1 11 /32 3.731 1 /4 4 1 1 /16 3 5 /8 15000 26000
SMN215KS SN215K 315 2 15 /16 175 74.61 37 37.3 37.3 100.38 6.4 112.7 31.8 100.0 6.456 14.22 75700 125000
6.8898 2 15 /16 1.4567 1 15 /32 1 15 /32 3.952 1 /4 4 7 /16 1 1 /4 3 15 /16 17000 28500
SMN303KS SN303K 316 3 3 /16 190 80.96 39 40.5 40.5 106.91 6.4 119.10 31.8 106.4 8.04 17.71 86000 137000
7.4803 3 3 /16 1.5354 1 19 /32 1 19 /32 4.209 1 /4 4 11 /16 1 1 /4 4 3 /16 19300 30500
SMN307KS SN307K 318 3 7 /16 210 87.31 43 43.7 43.7 120.12 7.9 133.4 36.5 115.9 1.79 25.97 106900 156000
8.2677 3 7 /16 1.6929 1 23 /32 1 23 /32 4.729 5 /16 5 1 /4 1 7 /16 4 9 /16 24000 35500
SMO311WS-BR SO311K 319 3 11 /16 220 93.66 45 38.89 54.77 126.53 7.94 139.7 36.51 122.24 16.3 33.0 166000 224000
8.6608 3 11 /16 1.768 1 17 /32 2 5 /32 4.982 5 /16 5 1 /2 1 7 /16 4 13 /16 37500 50000
SMN315KS SN315K 320 3 15 /16 235 100.01 47 50 50 134.77 7.9 146.0 36.5 128.6 15.822 34.85 140300 193000
9.252 3 15 /16 1.8504 1 31 /32 1 31 /32 5.306 5 /16 5 3 /4 1 7 /16 5 1 /16 31500 43000
SMN407WS-BR (2) SN407K 322 4 7 /16 265 106.36 50 49.20 57.2 150.37 7.9 168.3 42.9 141.3 21.465 47.28 245000 280000
10.4331 4 3 /16 1.9685 1 15 /16 2 1 /4 5.92 5 /16 6 1 /2 1 11 /16 5 9 /16 55000 63000
SMN415WS-BR (2) SN415K 326 4 15 /16 300 115.89 59 54.0 61.9 176.56 7.9 206.4 42.9 150.8 33.773 74.39 327400 345000
11.811 4 9 /16 2.3228 2 1 /8 2 7 /16 6.951 5 /16 8 1 /8 1 11 /16 5 15 /16 73500 78000
(1) Bore tolerance: 15 /16” - 2 3 /16”, nominal to .013 mm, +.0005”.
2 1 /4” - 3 3 /16”, nominal to .015 mm, +.0006”.
3 1 /4” - 4 3 /16”, nominal to .018 mm, +.0007”.
4 7 /16” - 4 15 /16”, nominal to .020 mm, +.0008”.
(2) For applications where thrust load exceeds 60% of radial load, consult your Timken representative.
F
d
C
S G
B
L
B
1
B 2
d1
D
TIMKEN PRODUCTS CATALOG D73
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