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