Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 12-11-2014, 08:14   #1
Registered User

Join Date: Dec 2009
Location: Pickering Ontario
Boat: 1995 hunter 430
Posts: 269
sprocket rotary drive

I have contacted ....Applied....for a quote on my sprockets for my type 2 rotary drive,
as per the chart I need a 15 tooth and a 57 tooth sprocket with a three eighth pitch..........the 15 tooth is no problem along with the chain.......but the 57 tooth is a special order and its 450 bucks..........(the 15 tooth is 70 bucks).....
am I looking in the right spot....
is this normal....
please adise

Navicula is offline   Reply With Quote
Old 12-11-2014, 14:52   #2
Registered User
GrowleyMonster's Avatar

Join Date: Dec 2012
Location: New Orleans
Boat: 1976 Cal 2-27
Posts: 1,003
Re: sprocket rotary drive

Is this a engine to prop reduction gear? Electric motor repower? I would say look for a sprocket that is close to what you want and don't worry about being exact. As long as the reduction ratio doesn't change more than 5% or so, you will never know the difference. If one tooth more or less saves you $400 then it is money well saved.

1976 Cal 2-27 sloop, MR WIGGLES
Now with clean, dependable electric propulsion!
GrowleyMonster is offline   Reply With Quote
Old 12-11-2014, 15:00   #3
Registered User

Join Date: Mar 2009
Location: Australia, Central Coast.
Boat: Boden 36 Triple chine long keel steel, named Nekeyah
Posts: 689
Re: sprocket rotary drive

57 divided by 15 gives you a 3.8: 1 ratio. Any combination of sprockets that gives you that ratio will work, so try to find it in common sizes.

boden36 is offline   Reply With Quote
Old 12-11-2014, 15:00   #4

Join Date: Feb 2013
Location: Boat is on the Rio Dulce
Boat: Seafarer36c
Posts: 3,584
Re: sprocket rotary drive

I think he is talking auto pilot? If so, is there a rudder angle sensor?
Guy is offline   Reply With Quote
Old 12-11-2014, 15:01   #5
Senior Cruiser
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 4,631
Re: sprocket rotary drive

I picked up sprockets from McMaster Carr for my type 1 rotary drive.....

Sailmonkey is online now   Reply With Quote


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Autopilot: Linear vs. Rotary Drive Rchrdm Marine Electronics 31 09-09-2016 08:21
Rotary Drive Type 2 Navicula Marine Electronics 4 28-08-2014 13:19
Want To Buy: Raymarine type one rotary drive Badsanta Classifieds Archive 1 09-02-2014 10:17
Raymarine Rotary Drive-AutoPilot Chef Mike Marine Electronics 0 23-07-2012 11:02
Want To Buy: ST 7000 Control Head / Rotary Drive Unit quartersplash Classifieds Archive 0 16-02-2010 19:45

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:43.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.