Propeller dimensions

Please be aware:

  • Unlike the general perception, even as little as 8-10 mm of free space between propeller and hull will be fine. However, this of course depends on the specific hull shape and less clearence will normally increase propulsion noise.

  • Due to the nature of the propeller construction, folding blades are positioned further aft than a fixed propeller (see hub length) and thereby leave more space between shaft and hull.

 

View dimensions:

Hub length, (A) ISO standard shaft
Hub length, (A) SAE standard shaft
Hub length, (A) IMP standard shaft
Hub length, (A) saildrive
Blade length (B)
Propeller diameter


How to calculate the total length of the folded propeller:




 


Hub length, ISO standard shaft

Hub length (A), 2-blade

22 mm shaft, 1:10 taper = 88 mm ≈ 3.5"
25 mm shaft, 1:10 taper = 110 mm ≈ 4 3/8"
30 mm shaft, 1:10 taper = 130 mm ≈ 5 1/8"


Hub length (A), 3-blade up to 23"

25 mm shaft, 1:10 taper = 120 mm ≈ 4 47/64"
30 mm shaft, 1:10 taper = 136 mm ≈ 5 23/64"
35 mm shaft, 1:10 taper = 146 mm ≈ 5 3/4"
40 mm shaft, 1:10 taper = 156 mm ≈ 6 9/64"
45 mm shaft, 1:10 taper = 196 mm ≈ 7 23/32"

 

Hub length (A), 3-blade >22" and 4-blade

35 mm shaft, 1:10 taper = 148 mm ≈ 5 53/64"
40 mm shaft, 1:10 taper = 157 mm ≈ 6 3/16"
45 mm shaft, 1:10 taper = 196 mm ≈ 7 23/32"
50 mm shaft, 1:10 taper = 206 mm ≈ 8 1/8"


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Hub length, SAE standard shaft

Hub length (A), 2-blade

3/4" shaft, 1:16 taper = 100 mm ≈ 4.0"
7/8" shaft, 1:16 taper = 115 mm ≈ 4.5"
1" shaft, 1:16 taper = 130 mm ≈ 5 1/8"
1 1/8" shaft, 1:16 taper = 142 mm ≈ 5 19/32"
1 1/4" shaft, 1:16 taper = 157 mm ≈ 6 3/16"


Hub length (A), 3-blade up to 23"

1" shaft, 1:16 taper = 136 mm ≈ 5 23/64"
1 1/8 shaft, 1:16 taper = 146 mm ≈ 5 3/4"
1 1/4" shaft, 1:16 taper = 156 mm ≈ 6 9/64"
1 1/2" shaft, 1:16 taper = 194 mm ≈ 7 41/64"
1 3/8" shaft, 1:16 taper = 177 mm ≈ 7"
1 3/4" shaft, 1:16 taper = 210 mm ≈ 8 9/32"

 

Hub length (A), 3-blade >22" and 4-blade

1 1/2" shaft, 1:16 taper = 202 mm ≈ 8"
1 3/4" shaft, 1:16 taper = 210 mm ≈ 8 9/32"
2" shaft, 1:16 taper = 275 mm ≈ 10 53/64"

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Hub length, IMP standard shaft

Hub length (A), 2-blade

3/4" shaft, 1:12 taper = 96,5 mm
1" shaft, 1:12 taper = 110 mm ≈ 4 3/8"
1 1/4" shaft, 1:12 taper = 129 mm ≈ 5 5/64"

Hub length (A), 3-blade up to 23"

1" shaft, 1:12 taper = 116 mm ≈ 4 37/64"
1 1/4" shaft, 1:12 taper = 136 mm ≈ 5 23/64"
1 1/8 shaft, 1:12 taper = 120 mm ≈ 4 47/64"
 

Hub length (A), 3-blade >22" and 4-blade

1 3/4 shaft, 1:12 taper = 196 mm ≈ 7 23/32"


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Hub length (A), saildrive

 

Hub for 2-blade propeller = 135 mm
Hub for 3-blade propelelr = 135 mm

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Blade length (B)

2-blade propeller:

12" = 139 mm ≈ 5 31/64"
13" = 152 mm ≈ 6"
14" = 165 mm ≈ 6.5"
15" = 177 mm ≈ 7"
16" = 190 mm ≈ 7.5"
17" = 203 mm ≈ 8"
18" = 215 mm ≈ 8 15/32" 
 

3-blade propeller:

14" = 151 mm ≈ 6"
15" = 163 mm ≈ 6 27/64"
16" = 176 mm ≈ 6 15/16"
17" = 189 mm ≈ 7 29/64"
18" = 202 mm ≈ 7 61/64"
19" = 216 mm ≈ 8 1/2"
20" = 227 mm ≈ 8 15/16"
22" = 282 mm ≈ 11 7/64"
 

4-blade propeller:

25" = 275 mm ≈ 10 53/64"

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Propeller diameter:

12" = 305 mm
13" = 330 mm
14" = 356 mm
15" = 381 mm
16" = 406 mm
17" = 432 mm
18" = 457 mm
19" = 485 mm
20" = 508 mm
21" = 533 mm
22" = 559 mm
24" = 610 mm (3-blade propeller)
24" = 625 mm (4-blade propeller)
25" = 635 mm

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flexofold saildrive propellers

Saildrive Propellers

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Shaft Propellers

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flexofold spare parts

Spare Parts

Find spare parts for your propeller here