Loctite

[Ruffles]

Non boaty.

I reassembled a pedal cone/nut on a bicycle using blue loctite last night.

This morning the exposed excess had not set at all. Is this normal? Will it have set on the thread?

It was quite liquid when I applied it. Should I have shaken the bottle?

 

[macd]

Non boaty.

I reassembled a pedal cone/nut on a bicycle using blue loctite last night.

This morning the exposed excess had not set at all. Is this normal? Will it have set on the thread?

It was quite liquid when I applied it. Should I have shaken the bottle?

Thread locking compounds set in the absence of oxygen (otherwise, apart from anything else, they'd set in the bottle: that's why it comes only part-full). So you'd expect the exposed Loctite to remain liquid. Where it counts, it's a different matter.

 

[vyv_cox]

Quite normal in my experience, explanation as Macd says. If worried, why not disassemble to find out? Not a major task to remake the joint.

 

[rob2]

In the workshop, when there is any play in the parts being sealed with loctite it is normal practice to spit on the joint so that the air is excluded and all the loctite will set. The manufacturers sell small spray bottles for the same purpose!

Rob.

 

[philip_stevens]

....spit on the joint....The manufacturers sell small spray bottles for the same purpose!

Rob.

Wot! bottles of spit???

sorry 'bout that

 

[Heckler]

In the workshop, when there is any play in the parts being sealed with loctite it is normal practice to spit on the joint so that the air is excluded and all the loctite will set. The manufacturers sell small spray bottles for the same purpose!

Rob.

Loctite sets by reacting with water in the atmosphere
Stu
Or is it silicone?

 

[30boat]

Loctite sets by reacting with water in the atmosphere
Stu
Or is it silicone?

That's silicone.Loctite hardens in anaerobicly.Is that a word?

 

[macd]

Loctite sets by reacting with water in the atmosphere
Stu
Or is it silicone?

Lots of polyurethane compounds do that, but not Loctite or other similar thread-locking potions, which rely on an anaerobic environment (and often the presence of metal ions) to cure.

For tech info on Loctite blue (Loctite 242) see: www.loctiteproducts.com/tds/T_LKR_BLUE_tds.pdf

 

[savageseadog]

That's silicone.Loctite hardens in anaerobicly.Is that a word?

Anoxically..............no oxygen

 

[macd]

Anoxically..............no oxygen

Anaerobic is the more normal usage in the context of conditions. Anoxic is preferred for lack of oxygen in organic tissues (both of which are some esoteric distance from whether a bit's going to fall off a bike )

 

[rob2]

Wot! bottles of spit???

sorry 'bout that

Marvellous idea! I can't remember what's in the bottles, something organic I believe so it evaporates off after the stuff has cured. I knew one guy who had a whole heap of hoses to make up, so he dropped them all in a bucket of water - he was all out of spit! (probably sold it all...)

Rob.

 

[Ruffles]

Quite normal in my experience, explanation as Macd says. If worried, why not disassemble to find out? Not a major task to remake the joint.

'Tis in this case. The bearings are loose and tiny. You have to 'stick' them in with grease and try not to sneeze when assembling.

Thanks for the explanation guys. I'll replace the pedal with confidence.