R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 02-17-2011, 02:38 PM   #1
Tech Rookie
 
Join Date: May 2009
Posts: 3
Questions?? Yokomo hinge pins alternative

I'm looking for an alternative to the original steel hinge pins in my Yokomo Type C drift chassis. The steel ones are rusting so I'm looking for titanium.
The pins are 2.5mm diameter so do any other cars share this size pin that titanium hinge pins are readily available for.
The longer pins are 56.5mm long and the shorter pins are 29mm long.
Thanks.
jdm86gtz is offline   Reply With Quote
Old 02-17-2011, 04:38 PM   #2
Tech Elite
 
niznai's Avatar
 
Join Date: Feb 2009
Location: All over the place
Posts: 2,940
Default

Not sure if that's exactly right, but you know better.

I have an SD-SSG which I suppose should have the same size hingepins. They are 3mm inboard, and 2.5mm outboard. Now that I think of it it may actually be something weird like 2.4mm outboard.

Nevermind that though.

One option readily available is to go buy a decent tool with the right size shank (pin punch for instance, but can be a screwdriver, etc.). They are not going to be titanium, but tool steel if they're a good quality, and that's as strong as it gets (albeit heavier than titanium). Cut the shank to desired length and you have your hingepins. The advantage is they are precision ground to size.

Another idea is to use drill bits. Hard to find in that length since you can only use the round part of the shank, and a compounding problem is that only part of the shank is hardened, so it will bend past that point.

Looking for titanium is a good idea, but can take a while.

I have managed to find titanium rod eventually on ebay, but even though it was advertised as 3mm diameter in fact is was 3.14 for one of them and the other was 3.12mm. That is enogh to make the suspension arm articulation stiff. I had to sand them down and it's a PITA because you have to keep it round and consistent along the length.

Even aftermarket parts made by serious companies have this problem (i.e. they're a fraction too large). I bought OEM Traxxas suspension hingepins (Titanium) with this problem, I have bought Lunsford hingepins with this problem. There is nothing else you can do about it then but sand them down with a lot of patience.

Good luck.
__________________
Team Greasy Weasel

The best upgrade to any car is some driver skill.
niznai is offline   Reply With Quote
Old 02-17-2011, 05:18 PM   #3
Tech Rookie
 
Join Date: May 2009
Posts: 3
Default

The problem I had was the original pins rusted and stiffened up the suspension, I just replaced them with more steel pins but I think I'll keep looking for titanium pins.
Thanks.
jdm86gtz is offline   Reply With Quote
Old 02-17-2011, 06:31 PM   #4
Tech Elite
 
SammyZ's Avatar
 
Join Date: Sep 2005
Location: New England
Posts: 3,045
Trader Rating: 138 (100%+)
Default

nobody makes an aftermarket replacement for the yokomo hinge pins, sorry.
__________________
Hotbodies USA
SweepRacing USA
SammyZ is offline   Reply With Quote
Old 02-17-2011, 06:33 PM   #5
Tech Elite
 
niznai's Avatar
 
Join Date: Feb 2009
Location: All over the place
Posts: 2,940
Default

Quote:
Originally Posted by jdm86gtz View Post
The problem I had was the original pins rusted and stiffened up the suspension, I just replaced them with more steel pins but I think I'll keep looking for titanium pins.
Thanks.
Can you polish them with some fine sandpaper? Stick'em in a drill, spin them at 3000rpm and grab with a piece of fine grit (600 or higher) wrapped around. Slide hand along as you go, so you don't thin them out unevenly. Some WD40 wouldn't hurt. They'll polish nicely.
__________________
Team Greasy Weasel

The best upgrade to any car is some driver skill.
niznai is offline   Reply With Quote
Old 02-17-2011, 08:07 PM   #6
Tech Elite
 
defcone's Avatar
 
Join Date: Feb 2009
Location: Sydney
Posts: 2,344
Trader Rating: 15 (100%+)
Default

Roche has a titanium one for the bd5.
defcone is offline   Reply With Quote
Old 02-17-2011, 10:29 PM   #7
Tech Elite
 
niznai's Avatar
 
Join Date: Feb 2009
Location: All over the place
Posts: 2,940
Default

Quote:
Originally Posted by defcone View Post
Roche has a titanium coated one for the bd5.
fixed
__________________
Team Greasy Weasel

The best upgrade to any car is some driver skill.
niznai is offline   Reply With Quote
Old 02-18-2011, 04:28 AM   #8
Tech Elite
 
kschu's Avatar
 
Join Date: Mar 2007
Location: Kota Kinabalu,Sabah
Posts: 4,598
Trader Rating: 16 (100%+)
Send a message via MSN to kschu
Default

Quote:
Originally Posted by niznai View Post
fixed
none coated....just a harden hinge pin...
__________________
Give the best while u can !
kschu is offline   Reply With Quote
Old 02-18-2011, 05:16 AM   #9
Tech Champion
 
tc3team's Avatar
 
Join Date: Mar 2006
Location: UK
Posts: 6,151
Default

Quote:
Originally Posted by jdm86gtz View Post
I'm looking for an alternative to the original steel hinge pins in my Yokomo Type C drift chassis. The steel ones are rusting so I'm looking for titanium.
The pins are 2.5mm diameter so do any other cars share this size pin that titanium hinge pins are readily available for.
The longer pins are 56.5mm long and the shorter pins are 29mm long.
Thanks.
i'm looking at this situation from a prevention rather than cure point of view.

Are you using it when its wet outside? (Hence the rusting)

Might not be the answer you are looking for though, you're not the only guy out there who likes to drift in the wet...
__________________
Fusion Hobbies / www.horshamrc.org

The wife stops me being sane and the r/c stops me from going insane....
tc3team is offline   Reply With Quote
Old 02-18-2011, 11:17 AM   #10
Tech Rookie
 
Join Date: May 2009
Posts: 3
Default

New Yokomo steel pins aren't too expensive and yes I should be a little bit more careful where I use it.
So what else uses 2.5mm diameter pins
jdm86gtz is offline   Reply With Quote
Old 02-18-2011, 12:17 PM   #11
Tech Master
 
HarryLeach's Avatar
 
Join Date: Feb 2009
Location: Hampton, VA, USA
Posts: 1,596
Send a message via AIM to HarryLeach
Default

Doubt you'll find titanium rod in a tolerance that will be acceptable.

Check out www.mcmaster.com search for drill blanks.

Hardened steel rods you can cut to length with a high degree of accuracy on roundness and straightness.
__________________
Privateer racing lots of stuff.
Remember kids, racing isn't fair!
HarryLeach is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
The New Malta Guys Race Chat 10malta Malta R/C Racers 679 11-15-2004 09:19 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 03:26 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net