Forums General Discussion Mast head sheeve Reply To: Mast head sheeve


Ron suggested I forward this to group so here it is.

– pat

Begin forwarded message:

From: pat noordsij <>
Subject: Re: Mast head sheeve
Date: October 9, 2020 at 9:01:34 PM CDT

So now that I sent that message I, of course, found the notes on the sheaves.

4 Main sheaves –
Diameter: 4.75”
Axle: 5/8”
Width: 5/8”
We reused the existing axle as it was in good shape. Doris is a fresh water boat.

2 Mizzen sheaves –
Axle: 3/8”
Width: 1/2”
Can’t find the diameter measurement

Attached are pictures of our notes page. These notes are from Spring 2004.

On Fri, Oct 9, 2020 at 7:57 PM pat noordsij <> wrote:
We purchased 6 sheaves from Zephrwerks
( in Port Townsend WA in ~ 2006.

We opted for all rope delrin sheaves. We’ve been very happy with them.

I can’t find the invoice right now but we should have the specs on the boat. We’ll look tomorrow.

– pat (and dave)

On Fri, Oct 9, 2020 at 16:14 figie47gmail-com <> wrote:
Has anyone changed the masthead halyard sheeves on their ketch 424?

If so do you have the specs?

Does anyone have photos of the masthead showing the sheeve set-up?

Main sail drops only half way down. I will clean the track, change the running rigging and change the sheeves.

Cleaning the track is a must and it’s time to upgrade all the running rigging.

If I do the job I might as well go all the way and upgrade the sheeves.

Thanks for any help you can pass along.

S/V Patricia Bess #218



  1. sheave info - main

  2. sheave info - mizzen