Yet Another Cycling Forum

General Category => Freewheeling => Folders => Topic started by: quixoticgeek on February 16, 2020, 10:12:11 pm

Title: Stiff hinges
Post by: quixoticgeek on February 16, 2020, 10:12:11 pm


The main frame hinge is getting really stiff now.

What have people found most effective to lube this hinge? Would chain lube work? Wd40? Or should I invest in some sort of penetrating oil?

Thanks

J
Title: Re: Stiff hinges
Post by: bludger on February 16, 2020, 10:20:06 pm
I'd use Boeshield T-9 if you can get it. Great for chains too.

https://boeshield.com/uncategorized/uses-for-boeshield-t-9-around-the-house/

https://boeshield.com/marine/
Title: Re: Stiff hinges
Post by: grams on February 16, 2020, 10:24:36 pm
A couple of drops of chain oil normally does the job.

I assume you mean Brompton and not knees.
Title: Re: Stiff hinges
Post by: drossall on February 16, 2020, 10:31:50 pm
I'd use Boeshield T-9 if you can get it. Great for chains too.
I use white grease, but might try that. As you say, if I can get it.
Title: Re: Stiff hinges
Post by: Ham on February 17, 2020, 10:53:35 am
You should also carefully examine where the apparent tightness is coming from, and especially if all components are aligned as intended. Sometimes with folders, wear (or, loosness) in one component shows up as tightness in another. Reversing gravity whilst observing the interplay of all components is good for that. (Turn it uʍopǝpᴉsdn  and see if it rattles)
Title: Re: Stiff hinges
Post by: quixoticgeek on February 17, 2020, 11:14:49 am

I put a couple of drops of Chain-L lube on the hinge last night. Will see how it is this afternoon when I ride to the shops.

Thanks all!

J
Title: Re: Stiff hinges
Post by: jiberjaber on February 17, 2020, 12:50:24 pm
Dental floss and a spray of gt85 sorted mine. I also took the opportunity to take out the bolts and clean and add some light grease.

Much improved!
Title: Re: Stiff hinges
Post by: quixoticgeek on May 10, 2020, 06:38:10 pm


It doesn't seem to have made a major improvement in hinge performance.

How easy is it to remove the hinge pin and reseat?

J
Title: Re: Stiff hinges
Post by: LittleWheelsandBig on May 26, 2020, 10:50:16 pm
The hinge pin needs to be drilled to remove the flare and then driven out. A replacement pin is pushed in and flared. You may wish to ream out the hinge. The three pin sizes are nominally 6.0mm, 6.1mm and 6.35mm to compensate for wear.
Title: Re: Stiff hinges
Post by: drossall on May 27, 2020, 08:22:58 am
My Brompton isn't getting used daily, as it usually would, because of not commuting. I'm finding that the hinges get stiff if not used. I had trouble unfolding it yesterday.
Title: Re: Stiff hinges
Post by: quixoticgeek on May 27, 2020, 12:51:52 pm
The hinge pin needs to be drilled to remove the flare and then driven out. A replacement pin is pushed in and flared. You may wish to ream out the hinge. The three pin sizes are nominally 6.0mm, 6.1mm and 6.35mm to compensate for wear.

I think that may be something I pay someone to do. Mostly so that if it goes wrong, it's their fault not mine...

J
Title: Re: Stiff hinges
Post by: Giropaul on May 27, 2020, 06:50:42 pm
I was about to make some comment about Hinge being a bit stiff, and Bracket’s looking worried.

But I’m probably the only person old enough to find it amusing!
Title: Re: Stiff hinges
Post by: LittleWheelsandBig on May 28, 2020, 11:01:26 pm
I understand the reference but have never actually heard/ seen them.

Just for completeness, the hinge pins also come in two lengths, one for LWB frame hinges (I have those in all diameters) and another for SWB frame hinges and handlebar stem hinges. All good fun.