Royal Viking
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- Apr 17, 2010
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I thought I knew how to center a part in a 4 jaw until now. I have centered a part in my 4 jaw chuck. It took me quite a while to get it centered due to the shape of the object (noted on a different thread). I am using a dial indicator that reads to .001 inch. I have it so that the needle now fluctuates about two needle widths when the chuck is turned. This is about 1/5th of the distance in the dial ticks for .001 inch.
The part that I am making is a taper adapter sleeve to mate the crankshaft of a motorcycle engine to a CVT clutch. The part that I have chucked up is the stub left over from the original crankshaft that failed, it had snapped off the shaft. I need to find the angle for the taper from this piece to make the inner taper for teh sleeve. The failure could be attributed to a flaw in the crankshaft as well as an out of balance at the end of the shaft due to the clutch retaining bolt being tapped off center.
This engine may see 9000 rpm and here I am wondering "how close is close enough"? When you are building a model engine how do you determine the tolerances?
The part that I am making is a taper adapter sleeve to mate the crankshaft of a motorcycle engine to a CVT clutch. The part that I have chucked up is the stub left over from the original crankshaft that failed, it had snapped off the shaft. I need to find the angle for the taper from this piece to make the inner taper for teh sleeve. The failure could be attributed to a flaw in the crankshaft as well as an out of balance at the end of the shaft due to the clutch retaining bolt being tapped off center.
This engine may see 9000 rpm and here I am wondering "how close is close enough"? When you are building a model engine how do you determine the tolerances?