Inboard Propeller Bore dimensions
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Marine Propeller Hub Bore Dimensions
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Taper 3/4" per foot • 1/16" per inch
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Shaft Size
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Diameter Small End "A"
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Keyway Width "C"
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Keyway Depth "D"
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Standard Taper
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Min.
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Max.
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Nom.
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Min.
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Max.
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Nom.
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Min.
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Max.
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3/4”
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0.608
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0.610
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3/16
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0.1865
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0.1875
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3/32
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0.098
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0.100
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7/8”
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0.710
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0.712
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1/4
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0.249
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0.250
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1/8
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0.129
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0.131
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1”
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0.812
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0.814
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1/4
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0.249
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0.250
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1/8
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0.129
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0.131
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1-1/8”
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0.913
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0.915
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1/4
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0.249
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0.250
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1/8
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0.129
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0.131
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1-1/4”
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1.015
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1.017
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5/16
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0.3115
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0.3125
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5/32
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0.162
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0.165
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1-3/8”
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1.116
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1.118
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5/16
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0.3115
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0.3125
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5/32
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0.161
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0.164
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1-1/2”
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1.218
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1.220
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3/8
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0.374
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0.375
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3/16
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0.195
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0.198
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1-3/4”
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1.421
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1.423
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7/16
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0.4365
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0.4365
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7/32
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0.226
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0.229
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|
2”
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1.624
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1.626
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1/2
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0.499
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0.500
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1/4
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0.259
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0.262
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2-1/4”
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1.827
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1.829
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9/16
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0.561
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0.5625
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9/32
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0.291
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0.294
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2-1/2”
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2.030
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2.032
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5/8
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0.6235
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0.625
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5/16
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0.322
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0.325
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2-3/4”
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2.233
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2.235
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5/8
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0.6235
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0.625
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5/16
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0.322
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0.325
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3”
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2.437
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2.439
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3/4
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0.7485
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0.750
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5/16
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0.323
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0.326
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3-1/4”
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2.640
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2.642
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3/4
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0.7485
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0.750
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5/16
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0.323
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0.326
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3-1/2”
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2.843
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2.845
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7/8
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0.8735
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0.875
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5/16
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0.324
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0.327
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3-3/4”
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3.046
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3.048
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7/8
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0.8735
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0.875
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5/16
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0.324
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0.327
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4”
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3.249
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3.251
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1
|
0.9985
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1.000
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5/16
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0.326
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0.329
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