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Post by mrriggs on Jun 28, 2013 22:10:31 GMT -5
Just thought you would like to see what has side tracked me from my big bore project.  What you are looking at is the two center webs bored out to eliminate the splined shaft. The new shaft at the bottom is roughed out of a chunk of 1045. The sprocket teeth will be cut directly into the crank pin then the OD will be finished for an interference fit. |
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Post by crazypj22 on Jun 28, 2013 22:26:08 GMT -5
Are you going to weld it in or use a key on each side?
Not sure interference fit will be enough?
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Post by mrriggs on Jun 28, 2013 23:10:16 GMT -5
It won't be JUST a press fit. I'm currently testing various retention methods to see what will be the strongest.
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Post by tonyc2me on Jun 28, 2013 23:47:04 GMT -5
That is great Mr.Riggs Tony C
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Brian
New Member
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Post by Brian on Jul 3, 2013 8:10:53 GMT -5
MrRiggs PM your address and I'll donate a slotted cam gear that I can't use and you might use for this project.  |
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Post by Burns on Jul 5, 2013 11:39:54 GMT -5
Will you need to harden the surface of the gear teeth that you machine?
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Post by mrriggs on Jul 7, 2013 5:20:44 GMT -5
MrRiggs PM your address and I'll donate a slotted cam gear that I can't use and you might use for this project. I appreciate the offer but I really have no use for that sprocket. |
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Post by mrriggs on Jul 7, 2013 5:50:22 GMT -5
Will you need to harden the surface of the gear teeth that you machine? I will harden and temper the entire shaft. The sprocket teeth won't be as hard as the stock sprocket but since it is located inside the engine with a constant supply of clean oil, I don't anticipate it will wear out before the rest of the engine. |
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Brian
New Member
Posts: 30
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Post by Brian on Jul 19, 2013 8:27:19 GMT -5
Why not press the sprocket on like what is done on the camshaft? Dab of weld for insurance.
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Post by mrriggs on Jul 19, 2013 10:21:36 GMT -5
Why not press the sprocket on like what is done on the camshaft? Dab of weld for insurance. With a solid 32mm shaft there is no room for a pressed on sprocket. That is why the stock shaft is stepped down in the center. I am attempting to eliminate that step so the shaft will be as strong as possible. |
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Brian
New Member
Posts: 30
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Post by Brian on Jul 21, 2013 8:19:18 GMT -5
I was thinking more of boring out the sprocket and making a ring gear out of it and pressing that on. Would there be enough left if you bore the center out of that gear to fit your new shaft size of 32 mm?
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Post by mrriggs on Aug 7, 2013 9:52:06 GMT -5
There is still a lot of finish work to do but it now has sprocket teeth.  You can see how little room there is between the root of the teeth and the outside of the shaft. It will be necessary to cut grooves on either side of the sprocket so the chain side plates clear the center flange. |
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Post by mrriggs on Aug 23, 2013 14:27:00 GMT -5
A finished center pin.   |
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plattey
Full Member
1982 xs650sj
Posts: 233
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Post by plattey on Oct 1, 2013 21:40:09 GMT -5
This is awesome! Is this going into your big bore engine? Is it going to be a stock 360 phase or the 270?
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plattey
Full Member
1982 xs650sj
Posts: 233
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Post by plattey on Oct 1, 2013 21:40:47 GMT -5
This is awesome! Is this going into your big bore engine? Is it going to be a stock 360 phase or the 270?
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