new lighten flywheel page

[Leadfoot350]

After seeing what my post turned out to be I desided to make a new clean post so no one mess it up. Boonman on my lathe I can chuck it up on the back side of the flywheel in the middle with the three fingers going out to hold it. I tried it and turned on the machine and brought the cutter buy just to see if it was even and it scraped only on one side opposite of the balancing drill marks. It is very close to cutting on the other side too so I think it is even. How do you chuck yours up? Do you have a picture of the device. I am just excited to use my new lathe that I would like to do it myself. I do not plan on doing anyone elses so please dont ask me.

[J.J.]

I would recommend machining a mandrel with the same dimensions and taper as the end of the crank where the flywheel is located, leave a thread on the end of the mandrel, and a centering hole for tailstock support.

To ensure everything stays true, do not remove the mandrel from the chuck once you've made the final cut.

Attach the flywheel to the mandrel and then make your cuts on the circumference of the flywheel using the dimensions given in the previous thread. Remember to support your mandrel at the free end with the revolving centre in the tailstock.

 

The purpose of this is to centre the flywheel using the crank taper as the reference point.

Edited September 12, 2004 by J.J.

[boonman]

J.J. has it nailed. That is precisely what I did. The Jig that I made uses a bolt to secure the flywheel onto the taper, but a piece left on the end that is threaded in order to place a nut on it would suffice as well. This will best mimic the end of the crank, as the flywheel will be bolted on the machine. There is no need to use the tailstock, as you will be close wnough to the chuck, and you will get chatter if you don't have good tooling being that the outer rim of the flywheel is only rivited to the center hub you are holding it with.... Getting the proper feed is essential, and that takes experience, and just general "know-how". Do NOT go too deep. Catastrophic part loss will be inevitable. And it will ruin your day..... Be careful......

[BdBanshee]

Exactly like Boonman and JJ said, this ensures that you will machine the flywheel exactly concentric to the crankshaft. I also don't feel the need to support the fixture with the tailstock, mine is made close to the chuck also.

 

I would also add to not get too close to the pulse triggers, they are hollow underneath and if you machine right up to them you will expose the hollow pocket.