Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 22-08-2010, 17:04   #1
Registered User

Join Date: Sep 2008
Location: Camden, ME
Boat: A Thistle and a Hallberg-Rassy 36
Posts: 685
Matched Pair V-Belts

The 100 amp alternator on my Westerbeke 44B is driven by dual v-belts, Gates 7405 size. I am trying to find a source for matched belts in this size. Manufacturing tolerances even within this size mean that belt tension is noticeably different between the two belts.

If they aren't sold as matched pairs (and Gates doesn't do so in this size from what I can glean) are there vendors that will somehow size a bunch of them and match them up to give best matched pairs?


SoonerSailor is offline   Reply With Quote
Old 22-08-2010, 17:14   #2
Registered User

Join Date: Jan 2010
Location: Wells, Vt
Boat: 42ft Colvin Gazelle - TLA HLA
Posts: 504
"they" say, nowadays, that belts from the same manufacture run are as close as the old "matched sets"...

Have you thought about multigroove belts? Suposed to run cooler with less tnsion, grip better and last longer...just another boat buck or two for pulleys and spares cause you probably won't find em everywhere.

ConradG is offline   Reply With Quote
Old 22-08-2010, 17:37   #3
Registered User

Join Date: Jan 2010
Location: Port Ludlow Wa
Boat: Makela,Ingrid38,Idora
Posts: 2,023
In a far away former life I sold such things. Look for an industrial supply house such as Bearings Inc. or Kaman Bearing or equivalent and give them the number. They will be able to access the info and get you availability or suitable upgrade, including sheaves. It should not be expensive.
IdoraKeeper is offline   Reply With Quote
Old 23-08-2010, 07:48   #4
Moderator Emeritus
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 32,215
Images: 240
The Gates belt matching system is called V80, which exceeds the RMA specification requirements.

The Rubber Manufacturers' Association (RMA) has set the specification of 0.15" as the tolerance for a set of matched belts.
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

GordMay is offline   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
Perkins 4-108 belts Wahoo Sails Engines and Propulsion Systems 14 04-02-2016 16:02
V-Belts allsail68 Engines and Propulsion Systems 5 30-11-2009 13:06
NPR: Recent Hurricanes Not Matched Since Middle Ages sneuman Seamanship & Boat Handling 40 28-08-2009 05:55
Drive belts Whimsical Engines and Propulsion Systems 5 01-09-2008 15:56
Yanmar 4JH3E belts Vasco Engines and Propulsion Systems 0 19-01-2007 08:21

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 12:54.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.