Raymarine Rotary Drive - Sprocket and Chain Installation

Rotary Drive - Installation Guide 11
Obtaining the steering sprocket
Obtain the appropriate sized steering sprocket from the steering
system manufacturer.
Obtaining the drive sprocket
Your Raymarine dealer can supply the following drive sprockets
(suitable for a
3
/
8
inch pitch chain):
• 13 tooth: part number M81182
• 15 tooth: part number M81183
• 17 tooth: part number M81184
• 19 tooth: part number M81185
• 25 tooth: part number M81186
CAUTION:
To stop the drive sprocket rotating on the drive shaft, the shaft
has a
1
/
8
inch square projection (a woodruff key) that fits into a
notch (or keyway) at the centre of the sprocket. If you use a non-
Raymarine drive sprocket, its bore and keyway dimensions must
fall within the ranges specified in Figure 5 for it to lock correctly
to the drive shaft.
Figure 5: Sprocket bore and keyway dimensions
9.46 mm – 9.61 mm
(0.3725 in – 0.3785 in)
3.22 mm – 3.24 mm
(0.127 in – 0.1275 in)
15.89 mm – 15.9 mm
(0.6256 in – 0.6275 in)
19 mm
(0.75 in)
12.7 mm
(0.5 in)
grub screw
D5084-1
bore
keyway