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Old 04-09-2013, 10:57 PM
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turning down a flywheel on a lathe-thickness specs

does anyone know if i can cut down a flywheel 1/8". the total thickness of the flywheel is around 1 3/16".. my problem is that i am using a RAM hydraulic throwout bearing and need a setup gap of .150".. i am using a 1/4" spacer between the bellhousing and engine and want to shave the flywheel surface down 1/8 to get me in the set tolerance..

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Old 04-09-2013, 11:29 PM
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the total thickness of the flywheel is around 1 3/16"..

Is that measurement at the outer area or the clutch disc surface area? Many f-wheels are relieved on the backside
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Old 04-09-2013, 11:35 PM
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Quote:
Originally Posted by BOBCRMAN@aol.com View Post
the total thickness of the flywheel is around 1 3/16"..

Is that measurement at the outer area or the clutch disc surface area? Many f-wheels are relieved on the backside
clutch disc surface
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Old 04-10-2013, 01:36 AM
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If you can do it, I would grind it. My buddy has done several flywheels in his milling machine with a rotary table.

Keith
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Old 04-10-2013, 01:51 AM
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flywheel machining

I've done it several times. I leave an extra .005-.010 for the finish grind on a flywheel grinder. Trying to grind that much off the flywheel will be really dirty, take a long time, wear the stone too much & generally piss the guy off . machining the flywheel on the lathe leaves circular grooves, no matter how fine a feed is used. That is not good for clutch disc life. Blanchard ground is the preferred- acceptable way to do it.Good idea to check it for balance after it's all done, if it's a neutral balanced flywheel, balance the clutch on the flywheel , you will be glad you did it.
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Old 04-10-2013, 05:20 AM
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I've done it several times. I leave an extra .005-.010 for the finish grind on a flywheel grinder. Trying to grind that much off the flywheel will be really dirty, take a long time, wear the stone too much & generally piss the guy off . machining the flywheel on the lathe leaves circular grooves, no matter how fine a feed is used. That is not good for clutch disc life. Blanchard ground is the preferred- acceptable way to do it.Good idea to check it for balance after it's all done, if it's a neutral balanced flywheel, balance the clutch on the flywheel , you will be glad you did it.


X2 and the stones for one of my machines are up to $600.00 a set.
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Old 04-10-2013, 06:37 AM
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THANKS TO ALL of you for the advice. this was holding me up for a couple of days.
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Old 04-10-2013, 11:06 PM
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Flywheel turning

Good luck with it . Let us know how it worked out for you.
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Old 04-11-2013, 06:48 AM
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MAJOR MISTAKE on my end.. i gave the flywheel to a friend to have cut down.. 1/8 was what i wanted but changed it to 3/32 .. i wrote 3/16 on the tag and 3/16 is what they cut off.. did i ruin this perfectly good flywhee.. damm im pissed.. this is what A.D.D.(attention defect disorder) does to me
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Old 04-11-2013, 11:21 AM
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flywheel

What engine was the flywheel from. I hope It wasn't something rare
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Old 04-11-2013, 12:25 PM
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Quote:
Originally Posted by toolmakeron View Post
What engine was the flywheel from. I hope It wasn't something rare
nothing rare, i already went and got another flywheel from a parts dealer.. now i have to cut this one down.. all of this for a RAM hydraulic throwout bearing that is supposed to be for stock clutches.. bull****! don't work with my stock clutch
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Old 04-11-2013, 12:59 PM
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flywheel

Yea , typical "Hotrod " stuff. One change seems to mean 6 others to make it work. When I see the words " bolt on" I damn near gag or wanna throw up. I wish the industry in the whole would be more honest. But then , it probably means less $ in their pockets. BUT when it works (rare) how it's supposed to, it's your lucky day & you better run out & buy some lottery tickets. Hahahahah
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Old 04-11-2013, 01:01 PM
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flywheel

I forgot...."Ask me how I know".......I'll talk for hours HAhahah
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Old 04-11-2013, 02:40 PM
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i'm really worried now! i'm taking measurement after measurement to make sure that the springs on the disc don't hit the flywheel mounting bolts if i cut this one because that sure enough is what just happened when i took off too much on the other flywheel
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Old 04-13-2013, 08:21 PM
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bought a new flywheel, turned it down 3/32 and resurfaced .003.. added the spacer between engine and bellhousing and whalah, perfect gap.. thanks to all again who showed interest
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