Menu

Sheave material

Search this Thread

Prev

Previous Post

Next Post

Next

#12

Report Post

posted to rec.boats.cruising

[email protected] salty@dog.com is offline

salty@dog.com is offline

external usenet poster

First recorded activity by BoatBanter: Sep 2007

Posts: 4,966

Default

Sheave material

On Wed, 4 Feb 2009 12:44:31 -0800 (PST), wrote:

On Jan 31, 9:35*am, "Garland Gray" wrote:
I need to replace some old plastic sheaves, and I have the option of sheaves
made of Delrin, acetal, or glass filled nylon. (I have learned that delrin
is acetal, *but don't know if all acetal sheaves are delrin).
So what are the relative attributes of acetal and glass filled nylon
sheaves? I read somewhere that GFN might be more abrasive on the pin, but I
assume that it is stronger. Ronstan sells both, but their website doesn't
solicit questions.

Nylon is very susceptible to UV degradation, but low friction. Don't
use it unless the part is both shielded from sunlight, and gets a lot
of running wear. Acetal is somewhat harder, better at resisting UV,
slightly higher friction, costs more.

It seems likely to me that a drop-in replacement for a specific sheave
will only be available in the material that specific mfg'r choses.

Fresh Breezes- Doug King

It's also important to note that not all nylon is created equal. Nylon
not made specifically for the marine environment may absorb moisture
and swell over time.

Reply With Quote

Reply With Quote

Thread Tools	Search this Thread
Show Printable Version	Search this Thread: Advanced Search
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

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

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
what material to use?	R Whellum	Boat Building	12	November 16th 04 06:18 PM
Deck material	Ole Skovrup	Boat Building	0	November 11th 04 01:16 PM
Caprail - material	Adam	Boat Building	9	July 29th 04 02:44 PM
New sail material	Parallax	Cruising	7	October 30th 03 03:19 AM
What material ??????	Ytter	Boat Building	0	October 4th 03 09:25 PM

All times are GMT +1. The time now is 09:37 PM.

About Us

"It's about Boats"

Contact Us BoatBanter Home Privacy Statement

Copyright © 2017