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| Posted: Tue Jun 19th, 2012 04:50 am |
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1st Post |
Phil Howard
Member
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One end of the axle is bent about 1/8", maybe a tad more. What kind of place would be able to straighten it or should I just heat/hammer it myself?
PhilLast edited on Tue Jun 19th, 2012 04:52 am by Phil Howard
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| Posted: Tue Jun 19th, 2012 11:30 am |
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2nd Post |
Steve Miller
Member
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phil ., you can try but i never have no luck i have to put mine in my lathe .no heat ..it dont sound like its bent real bad .??? lol.!! i put all the bent ones on my real slow karts . i usually dont worry about a tweeked axle unless it shakes me outa the seat .. besides by time your wheels are tiny bit out ., tires never balance out cuz there hard as a rock ., little tweeks in axle ., bearings few thou loose here and there ..i can never tell what all is shakin .. im not 100% sure its a good idea to heat an axle red hot to straiten it ..??? might make it real weak ..??
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| Posted: Tue Jun 19th, 2012 02:59 pm |
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3rd Post |
Joe Drabicki
Member
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Hi Phil,
Steve is right, heating an axle red hot to bend it may weaken it. I worked at a place where we straightened car steering tie rods. We just put them in a vise and applied force with a hydraulic ram to straighten them. We had a guage to determine if they were straight enough to use.
What diameter is the axle? Is it some rare kart axle? If it is nothing really special, new 3/4" and 1" axles can be bought for about $40 to $50 plus shipping from apskarting.com and other places.
Kind Regards, Joe
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| Posted: Tue Jun 19th, 2012 03:26 pm |
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4th Post |
David Luciani
Administrator
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bent rear axle = broken crankshaft.
be careful using a bent axle anywhere near the pto to chain to hub part of your kart.
personally i put any bent babies in the give away or play kart pile.
as steve said there's a ton of tiny variences that will add plenty of shake to a kart.
my take is a bent axle is one variable you can eliminate so why keep it.
as joe said they are only about 50$.
a really perfect precise one might run as much as a 100$ about what a new crankshaft would cost should you snap one off.
dave
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| Posted: Tue Jun 19th, 2012 04:30 pm |
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5th Post |
Sterling Brundick
Member
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Man, I love this forum. It is so informative. Most people would not consider the vibration issues and the trickle effect they can cause. Thanks Dave.
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| Posted: Tue Jun 19th, 2012 05:22 pm |
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6th Post |
Steve Miller
Member
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david very good point ., if its bent where the drive gear is .. over time it will rip crank bearings out for sure ..hard on clutches if chain goes lose tight lose .. hard on everything ..!! like you say... i put all mine on slow yard karts with briggs .. and go figure somethin your tryin to kill last forever .. but not good on somethin vintage .. but it sounded like the gentalmens wasnt bent bad at all .. i cant never tell whats wobbleing so i put mine in my lathe and check ..anything i have if its only an 1/8th ill leave it unless it was on some gorilla 3 engine 820 kart .. then prolly stuff should be pretty nice .. its good to have things very very nice but sometimes money is better spent on other things .. brand new axle will wobble 16th to an 1/8th easy ..!!! i never ever seen one yet perfect .. !!!! just somethin to think about ..
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| Posted: Tue Jun 19th, 2012 05:37 pm |
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7th Post |
Richard Harris
Member
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Straighten your axel with a large bar. We call 'em "Rock Bars". A short piece of rail road track or an anvil for support under neath. Your largest friend on the opposite wheel. Done it hundreds of times. Try not to over straighten, it will become weak if you do. NO HEAT. Good Luck,, Richard
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| Posted: Tue Jun 19th, 2012 05:37 pm |
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8th Post |
David Luciani
Administrator
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you can get lucky and get a pretty true axle.
the margay 150's were pretty consistant.
wish they still made them.
as steve said a 1/4" isn't bad unless you're running a monster.
but then with all that torque you're probably gonna get a ton of flex anyway.
dave
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| Posted: Tue Jun 19th, 2012 07:35 pm |
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9th Post |
Bill Johnson
Member
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All new axles need to be straighen to some degree. When they cut the keyways they go all to hell. Azuza axles being the worst i have seen out of the box new. If you can get each end under .007 you will be ok.
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| Posted: Tue Jun 19th, 2012 08:16 pm |
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10th Post |
Steve Miller
Member
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holy you got more patiants than i do .. if i can get one within .025 im happy .. but i dont have nothin real fast or an enduro somethin that would need good straight axle .. Last edited on Tue Jun 19th, 2012 08:20 pm by Steve Miller
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| Posted: Tue Jun 19th, 2012 09:10 pm |
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11th Post |
Terry Bentley
Member
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I have straightened axles for years. That big arbor press in one of my posts relating to pressing crankshafts is what works for me. Its easy to put these axles right back to zero. The most difficult ones are very thin wall 50mm axles on current Italian chassis. They are like staightening a piece of 2" muffler pipe. Any 25mm, 1", 30mm, 1 1/4", 1 3/8", 35mm, 40mm and 50mm all are about the same to straighten. A little common sense and patience and they run true the full length. What ever you decide, dont ever heat an axle to straighten. You will never get it back running true if heated.
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| Posted: Tue Jun 19th, 2012 09:14 pm |
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12th Post |
Terry Bentley
Member
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Steve Miller wrote: holy you got more patiants than i do .. if i can get one within .025 im happy .. but i dont have nothin real fast or an enduro somethin that would need good straight axle .. Holy crap!!!! That much run out would feel to me like I am rolling on square tires. Any axle I straighten is running well under 0.002" TIR or doesnt get used.
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| Posted: Tue Jun 19th, 2012 09:55 pm |
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13th Post |
Steve Miller
Member
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aaahhhhh your to fussy you been a machinest to long .Lol hehehahah ..!! seriously terry every time i spent the extra 12 minutes to true up an axle i put it all together bolt my 50 yr old wheels and brand new hard tires and heck it shakes as bad or worse .. make a thicker seat bottom you wont feel a thing ..!!! . hey by the way is that postam big enough for stew meat yet .. ??
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| Posted: Wed Jun 20th, 2012 12:54 am |
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14th Post |
| Posted: Wed Jun 20th, 2012 04:49 am |
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15th Post |
Phil Howard
Member
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It will be at least three or four days before I take off the axle to see how bad it is. As I find the time I have been cleaning & adjusting parts. So far I have taken apart the Carb, Reed assy, Starter assy, Points, Clutch, Rear Wheels, Brake Pedal assy, and Tie-rods. Made a Clutch Cover and painted the rear Wheel Hubs & Axle Gear. Keeps working & looking better. I think the last 6" of the axle on the drive side is where it is bent, wobbles quite a bit. I have a friend with some pretty heavy presses and might try those to straighten it. I will post how it turns out.
Thanks for the suggestions!
Phil Howard
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| Posted: Wed Jun 20th, 2012 05:16 am |
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16th Post |
Terry Bentley
Member
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That cute little opossum is still about the same size as my feral puppy cats. And now there are two. Last week the brother to my pita black puppy cat showed up. Its amazing how dumb this new cat is compared to the now domesticated black one. It is becoming a fast learner tho. Doesnt have that "female" attitude thing going on fortunately. I finally put out a pan of sodium bentonite today and they wasted no time filling it up with crap. Glad they dont need potty trained like a dog. That little opossum keeps showing up when I leave the lid off trash can for dog food. Its a very docile little thing during the day. But soon as the sun sets, becomes a totally different animal. A real Dr Jeckel and Mr Hide.
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| Posted: Sat Jun 30th, 2012 12:07 am |
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17th Post |
Phil Howard
Member
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Just wanted to let you know how it turned out. I had my wife stand on one side while I pried with my jack handle. It was so close after the first tweak I called it good. Still need to get done painting it before I put it back together and try it out.
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