Chain Catcher

For discussions about bikes and equipment.
User avatar
Mick F
Spambuster
Posts: 46388
Joined: 7 Jan 2007, 11:24am
Location: Tamar Valley, Cornwall

Re: MickFangStop (patents pending)

Postby Mick F » 5 Feb 2012, 7:34pm

PS.
They'd save a bit of weight if they cleaned their chains .............
Mick F. Cornwall

g00se
Posts: 151
Joined: 16 Apr 2010, 3:50pm

Re: MickFangStop (patents pending)

Postby g00se » 6 Feb 2012, 8:43pm

Just fitted a dog fang yesterday. On Ebay, you can get them for about 4.50 - though that's still about 4.49 more then your cost :-) .

Just for info, the dog fang is adjustable, you twist it around it's axis until the curved tooth is the right distance from the chain/ring.

Ayesha
Posts: 4192
Joined: 30 Jan 2010, 9:54am

Re: MickFangStop (patents pending)

Postby Ayesha » 7 Feb 2012, 8:40am

Image

This is the clamp half of a Halfords rear lamp bracket. I bet it weighs less than the aluminium jobbie.

Distance adjustable.
If the inner ring is really close, just chop off the pertruberance and use the clamp band boss as the chain guide.

Its plastic, silent, slightly flexible and does not damage the chain. It has a curved guide just like a commercial Dog fang.

rjb
Posts: 3400
Joined: 11 Jan 2007, 10:25am
Location: Somerset (originally 60/70's Plymouth)

Re: MickFangStop (patents pending)

Postby rjb » 7 Feb 2012, 9:33am

Wow ayesha - where's the big ring, do you live in an exceptionally hilly area :shock:
Those old lamp bracket clamps come in useful for all sorts of fixes.
At the last count:- Focus Variado, Peugeot 531 pro, Dawes Discovery Tandem, Dawes Kingpin, Raleigh 20, Falcon K2 MTB dropped bar tourer, Longstaff trike conversion on a Falcon corsa. :D

Ayesha
Posts: 4192
Joined: 30 Jan 2010, 9:54am

Re: MickFangStop (patents pending)

Postby Ayesha » 7 Feb 2012, 10:33am

rjb wrote:Wow ayesha - where's the big ring, do you live in an exceptionally hilly area :shock:
Those old lamp bracket clamps come in useful for all sorts of fixes.


Its a 36/22 chainset. I've got a 12 - 27 cassette now, so that's 21 to 81 inches.

I rode round California on a Spesh Allez sport which was set up similar. 32/22 with 11 - 25.

When I came back to England, I stopped using the 52 ring on this bike's OE chainset, so fitted the Californian set-up with a slightly higher top and a lower basement.

When I fitted the 36 ring in place of the 32 ring on a MTB chainset, that's when the chain unshipping problems started.

stoobs
Posts: 1307
Joined: 27 Nov 2007, 4:45am

Re: MickFangStop (patents pending)

Postby stoobs » 7 Feb 2012, 12:34pm

Fabulous invention, MickF.

You'll be telling us that you've toed your brakes in to stop squeaky brakes next! :wink:

Ayesha
Posts: 4192
Joined: 30 Jan 2010, 9:54am

Re: MickFangStop (patents pending)

Postby Ayesha » 7 Feb 2012, 1:03pm

stoobs wrote:Fabulous invention, MickF.

You'll be telling us that you've toed your brakes in to stop squeaky brakes next! :wink:


Next week we'll learn the correct way to fold our trouser legs before tucking them into socks. :D

User avatar
Mick F
Spambuster
Posts: 46388
Joined: 7 Jan 2007, 11:24am
Location: Tamar Valley, Cornwall

Re: MickFangStop (patents pending)

Postby Mick F » 8 Feb 2012, 7:55am

Just a quick update.

The Mk2.1 version with the nylon tube is ACE! :D
Mick F. Cornwall

reohn2
Posts: 35869
Joined: 26 Jun 2009, 8:21pm

Re: MickFangStop (patents pending)

Postby reohn2 » 8 Feb 2012, 8:57am

Mick F wrote:Just a quick update.

The Mk2.1 version with the nylon tube is ACE! :D


Are they available in black?
-----------------------------------------------------------
I cycle therefore I am.

rjb
Posts: 3400
Joined: 11 Jan 2007, 10:25am
Location: Somerset (originally 60/70's Plymouth)

Chain catcher

Postby rjb » 29 Feb 2016, 4:22pm

Took the tandem chainset off today to turn around a worn middle chainring. When it was off I noticed a dig in the chain stay probably caused by the chain having been unshipped from the inner chainring. Carefully radiused the gouge with a needle file then added a chain catcher made from a £1 shop led lamp bracket. It's a perfect fit. :mrgreen:

image.jpg
Led lamp bracket clamp
At the last count:- Focus Variado, Peugeot 531 pro, Dawes Discovery Tandem, Dawes Kingpin, Raleigh 20, Falcon K2 MTB dropped bar tourer, Longstaff trike conversion on a Falcon corsa. :D

User avatar
DaveP
Posts: 3227
Joined: 9 Mar 2007, 4:20pm
Location: W Mids

Re: Chain catcher

Postby DaveP » 29 Feb 2016, 6:58pm

Top prize for creativity, but you must realise that this is going to wear away quite quickly if its ever needed.
http://n-gear.com/index.html for the fit and forget version :)
Trying to retain enough fitness to grow old disgracefully...

BigG
Posts: 984
Joined: 7 Jun 2010, 4:29pm
Location: Devon

Re: Chain catcher

Postby BigG » 29 Feb 2016, 7:25pm

If it wears away quickly, then you have a front mech adjustment issue. It should only be needed rarely. I have used Jump-stop devices for many years with some very large drops from middle to small ring - up to 26 teeth. Judging from the dirt on the Jump-stop, it has seldom been used. Prior to using these devices I only once had a chain unship and jam between the frame and the crank. It took me upwards of 30 minutes in the cold and wet to free it. Once was enough and it has not happened since.

User avatar
CREPELLO
Posts: 5558
Joined: 29 Nov 2008, 12:55am

Re: Chain catcher

Postby CREPELLO » 29 Feb 2016, 7:45pm

We had a thread on DIY chain catchers a while back (Seems like only last year :shock: ), which included the MickFangStop and my own Chain Check Mate..

[ Graham : Now merged and "Too good to lose" ]
Last edited by Graham on 1 Mar 2016, 1:19pm, edited 1 time in total.
Reason: post-merge

rjb
Posts: 3400
Joined: 11 Jan 2007, 10:25am
Location: Somerset (originally 60/70's Plymouth)

Re: Chain catcher

Postby rjb » 29 Feb 2016, 8:24pm

Wow posted 4 years previous. I tried a search before posting but there were too many posts and I only checked back a couple of years. One of the mods was looking at an indexing system a while ago. Did it prove too difficult ?
Perhaps these 2 threads could be merged and moved to the technical too good to lose section as it comes up regularly.
At the last count:- Focus Variado, Peugeot 531 pro, Dawes Discovery Tandem, Dawes Kingpin, Raleigh 20, Falcon K2 MTB dropped bar tourer, Longstaff trike conversion on a Falcon corsa. :D

Brucey
Posts: 35564
Joined: 4 Jan 2012, 6:25pm

Re: Chain catcher

Postby Brucey » 29 Feb 2016, 8:45pm

I think a decent engineering plastic ought to be good enough for this kind of job, but I'm not at all sure that the kind of plastic used in the average pound shop lamp bracket falls into that category... :wink:

cheers
-------------------------------------------------------------------------------
~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~