I have 3 axles that I am going to check with my son this evening. Curious what an acceptable amount of runout should be?
The three axles:
M20 @ 1000mm
T2 @ 1000mm
T5 @ 1030mm (think its fine)
I have access to a manual and electric hydraulic press, V blocks, dial indicators, and even a height gage that will measure to the .0001. What I am lacking is a proper jig or fixture for straightening on. So my hope is that either the M20 or T2 are minor and we will use them for some upcoming practice sessions. If not, I will likely be looking at putting together a proper straightening jig and purchasing a replacement axle. Didn’t worry about it so much with the OTK, but dang these CRG axles are high!!!
Been a while since I’ve had to straighten axles, but my primitive method for doing so was to attach a dial indicator to the kart while the axle is still installed, identify the high spot, and go to work with a large dead blow. This only works for minor bends, of course. I would try to get them below 0.002".
The T5 is an absolute brick, and would probably not work with the above method
Yes, yes it is…
We went pretty extreme at Amarillo TSRS weekend trying to keep him free and away from a killer hop. The motor was and wouldn’t pull high rpm, so we were trying to lug the bottom so he had something to at least defend with on the long straight. Ended up not mattering, got smoked from behind L1, T1 of the final when the field checked up in front and someone behind didn’t. So the T5 has had someone ramp over him from behind and come down across his nose and leg. Concerned it may actually be out too. It was a hard lick.
I checked the T2 on the kart yesterday and had +.006 on the left, -.003 middle, and +.010 on the right. So I really need to get it off and see where exactly the bend is at so I can straighten it proper. The M20 and T5 he forgot to bring to me yesterday, so checking them all three outside of the kart this evening at work. They have better tools at work than I do at my shop.
Well Evan, the brick axle was out 7 thousandths. So yes, my son CAN bend a T5. The other two were 12 thousandths and 27.5 thousandths runout.
Rob, managed to get them all within 1 thousandth.
Having access to some proper tooling in the pump repair shop made it pretty easy to rig job a setup. Had 1 set of V blocks on a table top with a dial indicator and another set on a manual hydraulic press. Once I found the bend profile of each axle on the table, I knew where the high spot was at and where I needed to support it on the press. So then I would use a dial indicator at the press on the axle and slowly press on a bearing slid on the axle. Then I would take it and throw it back on the table to see how much permanent deformation I had managed. Overshot on 1 axle and had to work it back. Had never straightened an axle before, was pretty easy.
and wouldn’t pull high rpm, so we were trying to lug the bottom so he had something to at least defend with on the long straight. Ended up not mattering, got smoked from behind L1, T1 of the final when the field checked up in front and someone behind didn’t. So the T5 has had someone ramp over him from behind and come down across his nose and leg. Concerned it may actually be out too. It was a hard lick.