Which Loctite?
 

Which Loctite?  

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Mtb mad man
(@mtb-mad-man)
Eminent Member

Hi Guys. The main pivot bolt on my bike keeps getting loose. I was wondering what strength of Loctite I should use on it. Can anyone tell me? Thanks

Quote
Posted : 12/03/2015 12:58 pm
team womble
(@team-womble)
Estimable Member

You have used the word Loctite with a capital letter which indicates you are talking about a specific brand of thread-locking compound.
There are many different brands, and the colours and number codes are not always consistent with strength or application.
The varying designs and materials used for the fastener need to be taken into account when selecting which is an appropriate grade for the application.

For general info:
Loctite Blue 242 or 243 (latter being oil tolerant) are medium strength and used in areas that will require disassembly for servicing and repair.

Loctite Red 271 or 262 (latter for smaller stuff) is high strength and used in areas that are less likely to require disassembly. Heat may be required to assist in the removal process.

ReplyQuote
Posted : 12/03/2015 2:11 pm
nobeerinthefridge
(@nobeerinthefridge)
Noble Member

This may sound ridiculous, but have you tried grease/anti seize on the bolt? You'd be surprised how many people install bolts dry, and as such, the threads bind before the bolt has reached the elastic stage that is required to maintain torque.

Simple test to explain. Fit a bolt and torque to recommended setting, then put a mark with a marker across the head. remove, grease threads and re-torque. The marks won't line up, guaranteed.

The only time you should need an adhesive is if you have badly worn threads, or poorly manufactured threads. In this case, replace the bolts and nuts if fitted, if this doesn't work, then it's Loctite time!.

ReplyQuote
Posted : 12/03/2015 8:11 pm
alimac2411
(@alimac2411)
Trusted Member

MBR magazine on their youtube page recommend using Loctite 243

ReplyQuote
Posted : 13/03/2015 8:13 am
Trauty
(@trauty)
Noble Member

medium stength. always. Funny this thread. Only week ago i received my new (used) frame from pinkbike , and When I tried to get the pivot axle bolts out of frame for bearing inspection, I just totally rounded off the 5 mm allen key bolt heads because a previous owner of the frame used red locktite. I eventually managed to get the axles out thanks to my friend who has a set of bolt extractors but axles are wrecked so now I am waiting for frame parts from distributor
so here it goes. NEVER red unless you want it as permanent feature on your bike
facts : Blue medium locktite requires 12-15 Nm to untighten. Red heavy duty requires 30 Nm to untighten - no way an aluminium bolt can survive such a brute force .

ReplyQuote
Posted : 13/03/2015 5:48 pm
paul
 paul
(@paul)
Reputable Member

i had the same problem and used the blue stuff, its been fine for over a year now

ReplyQuote
Posted : 14/03/2015 10:21 am
ejr012
(@ejr012)
Honorable Member

Blue.

ReplyQuote
Posted : 15/03/2015 11:31 pm
Mtb mad man
(@mtb-mad-man)
Eminent Member

Thanks for your input guys, I'll go with the blue :thumbup:

ReplyQuote
Posted : 18/03/2015 7:57 pm
dmck6
(@dmck6)
Estimable Member

How much should the blue 243 Loctite be available for? Having a quick look online shows massive differences in prices :crazy:

Would £10.50 for a 50ml bottle be reasonable? http://www.ebay.co.uk/itm/LOCTITE-243-50ML-/151623231730?pt=LH_DefaultDomain_3&hash=item234d72e8f 2"> http://www.ebay.co.uk/itm/LOCTITE-243-50ML-/151623231730?pt=LH_DefaultDomain_3&hash=item234d72e8f2

ReplyQuote
Posted : 20/03/2015 7:38 pm
Trauty
(@trauty)
Noble Member

@dmck6 wrote:

How much should the blue 243 Loctite be available for? Having a quick look online shows massive differences in prices :crazy:

Would £10.50 for a 50ml bottle be reasonable? http://www.ebay.co.uk/itm/LOCTITE-243-50ML-/151623231730?pt=LH_DefaultDomain_3&hash=item234d72e8f 2"> http://www.ebay.co.uk/itm/LOCTITE-243-50ML-/151623231730?pt=LH_DefaultDomain_3&hash=item234d72e8f2

any medium strength will do. check halfords there is one for around £6

ReplyQuote
Posted : 21/03/2015 6:56 pm
dmck6
(@dmck6)
Estimable Member

Cheers Trauty, will have a look - need it for a loose pivot bolt

ReplyQuote
Posted : 21/03/2015 9:17 pm
dmck6
(@dmck6)
Estimable Member

@Trauty wrote:

@dmck6 wrote:

How much should the blue 243 Loctite be available for? Having a quick look online shows massive differences in prices :crazy:

Would £10.50 for a 50ml bottle be reasonable? http://www.ebay.co.uk/itm/LOCTITE-243-50ML-/151623231730?pt=LH_DefaultDomain_3&hash=item234d72e8f 2"> http://www.ebay.co.uk/itm/LOCTITE-243-50ML-/151623231730?pt=LH_DefaultDomain_3&hash=item234d72e8f2

any medium strength will do. check halfords there is one for around £6

Ah, the one they stock is like a pritt stick - I'll definitely give that a go, cheers!

ReplyQuote
Posted : 22/03/2015 4:49 pm
ejr012
(@ejr012)
Honorable Member

Got mine from halfords in a prit stick style tube. Used my BC discount. Got 60p off 😉

ReplyQuote
Posted : 22/03/2015 6:10 pm
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