Cromolly front axles can break.
04-24-2009, 07:43 AM
#31
JK Junkie
Thread Starter
That is a great picture... Sorry, not that what happened to you is great. Just that a picture is worth a 1000 words. Imagine if that shaft was so elastic that it could bend that much and return back to its normal position. How much stress would be constantly applied to the splines on the hub. You would be constantly damaging the hub, if your outer shaft was too elastic. Hence my point on not wanting a nipple on the short shaft.
Sorry, I get all geeky when talking about engineering. Can't help myself... did it for a living.
Sorry, I get all geeky when talking about engineering. Can't help myself... did it for a living.
04-24-2009, 11:26 AM
#32
JK Super Freak
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That is a great picture... Sorry, not that what happened to you is great. Just that a picture is worth a 1000 words. Imagine if that shaft was so elastic that it could bend that much and return back to its normal position. How much stress would be constantly applied to the splines on the hub. You would be constantly damaging the hub, if your outer shaft was too elastic. Hence my point on not wanting a nipple on the short shaft.
Sorry, I get all geeky when talking about engineering. Can't help myself... did it for a living.
Sorry, I get all geeky when talking about engineering. Can't help myself... did it for a living.
04-24-2009, 09:06 PM
#33
JK Super Freak
Just to expand a little... best example is rock climbing. Let say you fell and dropped 20 feet. Your force is now1200 foot lbs when the rope pulls tight. If the rope could not stretch (static) and could only hold 800 ft lbs of force, it would snap. Take that same fall, but this time use a dynamic rope (stretches) and can absorb 800 ft lbs a foot and stretches 2 feet, the total load it can handle would be 1,600 ft lbs. The rope doesn't break and you live.
Same holds true to that axle, it that axle can absorb 4k ft lbs per inch of twist, then the more it can twist (and still return to its original state), the more force it can handle.
hope that helps