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+--- Thread: [DG] [DG11] M81137 rotary drive unit (/showthread.php?tid=8825)
[DG11] M81137 rotary drive unit - johnspeetjens - 07-09-19 04:55 PM
I'm interested in adapting a M81137 rotary drive unit to replace my original Neco 17Dr8 drive unit. Can anyone tell me the shaft diameter and length on the Raymarine DU? I was hoping to use the same chain and sprocket off of the Neco unit.
Thanks
RE: [DG11] M81137 rotary drive unit - Derek - Raymarine - Moderator - 07-16-19 11:23 AM
Hi johnspeetjens
Thankyou for your enquiry.
We have attached a pdf of the generic sprocket shaft and keyway details, please note this is for a standard 3/8" pith sprocket, whilst the sprocket details will change, the shaft dimensions remain unchanged.
You will need to check the correct reduction ratio is applied since the NECO drive will have a slower output shaft speed than the Raymarine drive.
Regards
Derek