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IDLERS

Printed From: BHPC Forum
Category: Public: Open to anyone
Forum Name: Building
Forum Description: Anything to do with building HPVs
URL: https://forum.bhpc.org.uk/forum_posts.asp?TID=7603
Printed Date: 27 March 2026 at 3:18am
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com


Topic: IDLERS
Posted By: mark aldridge
Subject: IDLERS
Date Posted: 29 October 2023 at 1:05pm
Just a question that has been on my mind for a while. Why do some idlers have metal teeth for the chain to run on. In the old days the chain just used to run through tubes. I swapped my Wincheetah idlers for very expensive T-cycle ones and have ended up replacing the metal idlers with metal teeth for plastic non-toothed ones (ICE). I found the metal ones very noisy while the plastic ones are nearly silent. I appreciate they might wear out quicker but as the original plastic ones lasted tens of thousands of miles, I can live with it. I kept the T-cycle bolts and hangers so the idlers slide and self-align which is an improvement on the original Windcheetah but probably slightly heavier.


Replies:
Posted By: ega
Date Posted: 18 March 2024 at 3:21pm
You have incidentally answered the question I raised in another thread about the relative weights of T-cycle and standard idlers - thank you.
The sliding idler feature is a nice refinement.
The metal T-cycle sprockets are claimed to engage more efficiently with the chain rollers than a plain pulley. The Burrows design called for a central round-topped ridge in the bed of the nylon pulley and I notice that mine are beginning to wear to the shape of a sprocket which suggests that a harder plastics material than the existing Nylatron may be a good idea.

Posted By: ega
Date Posted: 18 March 2024 at 3:23pm
You have incidentally answered the question I raised in another thread about the relative weights of T-cycle and standard idlers - thank you.
The sliding idler feature is a nice refinement.
The metal T-cycle sprockets are claimed to engage more efficiently with the chain rollers than a plain pulley. The Burrows design called for a central round-topped ridge in the bed of the nylon pulley and I notice that mine are beginning to wear to the shape of a sprocket which suggests that a harder plastics material than the existing Nylatron may be a good idea.
PS Apologies if this turns out to be a double post!


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