RCCrawler Forums

YJJPWrangler · 01-30-2011, 10:37 PM

Hey guys,

Trying to get my axial running and I am having a problem with the driveshaft slipping on the pinion yoke of the axle. I've tightened the set screw as much as I can. Is there any way to fix this or is there an upgrade?

Zack

machr04 · 01-30-2011, 10:48 PM

just a ?? are you sure you have the set screw hitting the flat part of the shaft before you tighten it ?

freetimecrawler · 01-30-2011, 10:49 PM

You can/should add a second set screw. You could also get some steel yokes.

YJJPWrangler · 01-30-2011, 11:00 PM

yep, definitely got it hitting the flat spot on axle and I have the second screw on the other side. They are the plastic yokes and I don't want to strip them by over-tightening. I could also upgrade all the shafts to either MIPs or something else?

I was also thinking about drilling a hole through the yoke and then running a steel pin through it. Don't know if this would work or if it could eventually weaken the yoke itself.

freetimecrawler · 01-30-2011, 11:07 PM

Just get some steel yokes.

Highlucks · 01-30-2011, 11:26 PM

Steel yolks will work until you want to upgrade to something stronger. Stay away from 3 racing and intergy shafts, they are useless.

when you do upgrade have a look at the junfac shafts. I use them in my comp axial and rate them very highly. MIP's are great too but they are a lot bigger and heavier than the junfac's.

GRIMGREG · 01-31-2011, 10:57 AM

Steel yokes, blue locktite, and double set screws.

day215 · 01-31-2011, 11:13 AM

I had a similar issue with my steel yokes, a Guy at my LHS said not to use double set screws. I tapped out one of the holes to 4mm and installed a single 4mm traxxas set scree. Holds it nice and tight now, steel yokes would be the first step though.

YJJPWrangler · 01-31-2011, 12:27 PM

well, looks like I'm going to order some Junfac driveshafts. Not too expensive at $35 for both front and rear and I should have a solid drivetrain.

I'm assuming that with the steel yokes you can really torque down on those screws so it will hold tight. That and with some blue loctite, I don't see these things going anywhere.

Thanks guys, I will update my build thread in a bit.

Zack

freetimecrawler · 01-31-2011, 01:34 PM

Quote:

Originally Posted by day215

I had a similar issue with my steel yokes, a Guy at my LHS said not to use double set screws. I tapped out one of the holes to 4mm and installed a single 4mm traxxas set scree. Holds it nice and tight now, steel yokes would be the first step though.

I'm not sure why the guy at your LHS would tell you not to use 2 set screws? But, I've been runnung steel yokes with 2 set screws with my plastic shafts for well over 3 years now with 0 issues.

Dasher · 01-31-2011, 01:54 PM

I had the same problem, changed the yokes and haven't had a problem since. Junk the stock shafts as they're useless. I put 3racing ones one, and after reading up after the event bought some Junfac ones for when they fail. That was a good few battery packs ago and they ain't gone yet. I do keep them well lubed though. The blue locktite is essential - I bought my AX10 as an RTC and non of the set screws had been locked in chemically - needless to say I one of them first time out, came home and rebuilt the whole rig (a process that has been repeated man y times since)!

rockn · 01-31-2011, 11:54 PM

I have the same problem with my axial

scorpion so I bought a hole new rear end and added Beef tubes There some good tips when I opened the old rear end I couldn't find anything wrong with it.

gunnar · 02-01-2011, 12:15 AM

Plenty of room to go 4mm on the Junfac's:

gatecreeper · 02-01-2011, 12:38 AM

Quote:

Originally Posted by GRIMGREG

Steel yokes, blue locktite, and double set screws.

x2 steel yokes,blue locktight,double set screws

YJJPWrangler · 02-01-2011, 02:36 PM

Well, I ordered the Junfacs, they shipped from Korea today. I definitly want to put 4mm set screws in. Is it just a matter of running a 4mm tap in there or will I need to drill it out a little bit?

Zack

DioptricStraw · 02-01-2011, 03:12 PM

I run the junfac shafts on my rig. The set screws that come with the shafts have knurling on the tips to help prevent them from comming undone

gunnar · 02-01-2011, 08:05 PM

Quote:

Originally Posted by YJJPWrangler

Well, I ordered the Junfacs, they shipped from Korea today. I definitly want to put 4mm set screws in. Is it just a matter of running a 4mm tap in there or will I need to drill it out a little bit?

Zack

Drill out with a 1/8" drill bit, then use the 4mm tap.

01-30-2011, 10:37 PM	#1
YJJPWrangler Pebble Pounder Join Date: Aug 2006 Location: Raleigh NC Posts: 187	driveshaft/axle yoke problems Hey guys, Trying to get my axial running and I am having a problem with the driveshaft slipping on the pinion yoke of the axle. I've tightened the set screw as much as I can. Is there any way to fix this or is there an upgrade? Zack

01-30-2011, 10:48 PM	#2
machr04 Newbie Join Date: Nov 2010 Location: burlington Posts: 20	axle just a ?? are you sure you have the set screw hitting the flat part of the shaft before you tighten it ?

01-30-2011, 10:49 PM	#3
freetimecrawler Debunking old stereotypes Join Date: Feb 2006 Location: 1st and Amistad Posts: 2,260	You can/should add a second set screw. You could also get some steel yokes.

01-30-2011, 11:00 PM	#4
YJJPWrangler Pebble Pounder Join Date: Aug 2006 Location: Raleigh NC Posts: 187	yep, definitely got it hitting the flat spot on axle and I have the second screw on the other side. They are the plastic yokes and I don't want to strip them by over-tightening. I could also upgrade all the shafts to either MIPs or something else? I was also thinking about drilling a hole through the yoke and then running a steel pin through it. Don't know if this would work or if it could eventually weaken the yoke itself.

01-30-2011, 11:07 PM	#5
freetimecrawler Debunking old stereotypes Join Date: Feb 2006 Location: 1st and Amistad Posts: 2,260	Just get some steel yokes.

01-30-2011, 11:26 PM	#6
Highlucks Try to Bend it Join Date: Aug 2009 Location: Perth Australia Posts: 3,163	Steel yolks will work until you want to upgrade to something stronger. Stay away from 3 racing and intergy shafts, they are useless. when you do upgrade have a look at the junfac shafts. I use them in my comp axial and rate them very highly. MIP's are great too but they are a lot bigger and heavier than the junfac's.

01-31-2011, 10:57 AM	#7
GRIMGREG Rock Crawler Join Date: Nov 2010 Location: Ohio Posts: 496	Steel yokes, blue locktite, and double set screws.

01-31-2011, 11:13 AM	#8
day215 Quarry Creeper Join Date: Jun 2010 Location: Elk Grove Posts: 225	I had a similar issue with my steel yokes, a Guy at my LHS said not to use double set screws. I tapped out one of the holes to 4mm and installed a single 4mm traxxas set scree. Holds it nice and tight now, steel yokes would be the first step though.

01-31-2011, 12:27 PM	#9
YJJPWrangler Pebble Pounder Join Date: Aug 2006 Location: Raleigh NC Posts: 187	well, looks like I'm going to order some Junfac driveshafts. Not too expensive at $35 for both front and rear and I should have a solid drivetrain. I'm assuming that with the steel yokes you can really torque down on those screws so it will hold tight. That and with some blue loctite, I don't see these things going anywhere. Thanks guys, I will update my build thread in a bit. Zack

01-31-2011, 01:54 PM	#11
Dasher Croakin' across the pond! Join Date: Jan 2011 Location: Nottingham, UK Posts: 272	I had the same problem, changed the yokes and haven't had a problem since. Junk the stock shafts as they're useless. I put 3racing ones one, and after reading up after the event bought some Junfac ones for when they fail. That was a good few battery packs ago and they ain't gone yet. I do keep them well lubed though. The blue locktite is essential - I bought my AX10 as an RTC and non of the set screws had been locked in chemically - needless to say I one of them first time out, came home and rebuilt the whole rig (a process that has been repeated man y times since)!

01-31-2011, 11:54 PM	#12
rockn Rock Crawler Join Date: Sep 2009 Location: Temecula Ca Posts: 566	I have the same problem with my axial scorpion so I bought a hole new rear end and added Beef tubes There some good tips when I opened the old rear end I couldn't find anything wrong with it.

02-01-2011, 12:15 AM	#13
gunnar Ex Nor-CalRCRC slave Join Date: Dec 2008 Location: San Mateo, CA. Posts: 2,242	Plenty of room to go 4mm on the Junfac's:

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02-01-2011, 02:36 PM	#15
YJJPWrangler Pebble Pounder Join Date: Aug 2006 Location: Raleigh NC Posts: 187	Well, I ordered the Junfacs, they shipped from Korea today. I definitly want to put 4mm set screws in. Is it just a matter of running a 4mm tap in there or will I need to drill it out a little bit? Zack

02-01-2011, 03:12 PM	#16
DioptricStraw Rock Crawler Join Date: Oct 2010 Location: Ontario Posts: 579	I run the junfac shafts on my rig. The set screws that come with the shafts have knurling on the tips to help prevent them from comming undone

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Thread: driveshaft/axle yoke problems