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#1
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BJ4 hinge pin retention - how to improve?
A few times now, the rear hinge pins have worked their way loose, sliding forward or back and resulting in the pin bending and/or the wishbone breaking. It's getting tiresome hoping those fiddly little grub screws will hold the pins in place when they clearly don't work effectively.
Are there any tricks or mods to keeping those blasted pins in?
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Photos: Oople Invernational 2010 - Sodden Sunday Muchmore N. Irish GP 2010 (Touring cars) BADMCC 1/8th Nitro buggies Current cars: X6^2 | JC BJ4WE | TM E4 & E4JS | HPI E-Firestorm | Losi Crawler | + many F1s, super crawlers, scalers, drifters in the works... |
#2
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On mine I used to put a flat on the hingepin using a dremel cutting disk for the grubscrew to locate onto, just like a pinion.
Jimmy did the same in the BJ4WE review, top right of page 5... http://www.oople.com/rc/photos/reviewbj4we/page05.html |
#3
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Quote:
Would you recommend a tiny spot of threadlock or superglue on the grub to persuade it to stay put, or is that a bad idea near a hinge pin?
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Photos: Oople Invernational 2010 - Sodden Sunday Muchmore N. Irish GP 2010 (Touring cars) BADMCC 1/8th Nitro buggies Current cars: X6^2 | JC BJ4WE | TM E4 & E4JS | HPI E-Firestorm | Losi Crawler | + many F1s, super crawlers, scalers, drifters in the works... |
#4
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Threadlock for sure! The pin is meant to stay put in the blocks and pivot in the arm, so a bit of excess threadlock is fine so long as it doesn't impede the arm.
I used to dump loads on to make sure it never came out, in fact when I built a kit up usually the pins would stay put in the front block for the life of the car |
#5
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I swapped the grub screws out for short 4-40 cap heads and just torqued em up. Never moved after that
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Southport P.R.O. / Photographer of semi-naked girls www.srcc.co.uk - www.craigmagee.co.uk |
#6
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You can also superglue the hingepins into the front block.
if you ever need to remove it, just heat the block and hingepin with a soldering iron. The other suggestions are good too. |
#7
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I made the flats in the pins and used plenty of threadlock. I'll be ordering a load of imperial screws soon, I'll see if i can get stubby 4-40s. The same supplier does 1/8 and 3/16 grubs, the latter being 3 times cheaper!
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Photos: Oople Invernational 2010 - Sodden Sunday Muchmore N. Irish GP 2010 (Touring cars) BADMCC 1/8th Nitro buggies Current cars: X6^2 | JC BJ4WE | TM E4 & E4JS | HPI E-Firestorm | Losi Crawler | + many F1s, super crawlers, scalers, drifters in the works... |
#8
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Quote:
http://www.modelfixings.co.uk/index2.htm |
#9
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Yup i use Modelfixings to get screws and always been top service
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Southport P.R.O. / Photographer of semi-naked girls www.srcc.co.uk - www.craigmagee.co.uk |
#10
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£1.20 for 5 measly grub screws? I found a company selling 4-40 3/16ths for around £10 + VAT for 100, more in line with metric hardware prices.
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Photos: Oople Invernational 2010 - Sodden Sunday Muchmore N. Irish GP 2010 (Touring cars) BADMCC 1/8th Nitro buggies Current cars: X6^2 | JC BJ4WE | TM E4 & E4JS | HPI E-Firestorm | Losi Crawler | + many F1s, super crawlers, scalers, drifters in the works... |
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