Changfa YX180 to drive a 280 amp 12VDC alternator.

[okiezeke]

yes,
The fur ball makes all the difference.
\Zeke

[rcavictim]

yes,
The fur ball makes all the difference.
\Zeke

My bed is equipped with two of those feline fur balls.   

[okiezeke]

AhHah!!

A man who knows the secret of high intensity napping.

Zeke

[rcavictim]

AhHah!!

A man who knows the secret of high intensity napping.

Zeke

Yes, I enjoy the company of non-judgemental pussy.  Here are my two darlings.  Mother (B&W) and her son Fluffy.  He is the mouser in the family but shy with people and she is the ambassador when we have guests.

[okiezeke]

We have three similar furry critters.  However only one is really a cat, the other two appear to be space aliens in feline form.
Zeke

[okiezeke]

pully drive for changfa:

Was browsing thru the northern tool catalog when an idea appeared.  Would a brake drum make a serpentine belt pully for a changfa??  The flat part could be bolted to the flywheel with the open part out, and the surface could be smoothed and leveled as needed.  The size is about right.  Will need 8 to 12 inches for proper rpm on alternator- dont have it yet so not sure of driven pully diameter.  This calls for a trip to the junk yard.

Zeke

[rcavictim]

pully drive for changfa:

Was browsing thru the northern tool catalog when an idea appeared.  Would a brake drum make a serpentine belt pully for a changfa??  The flat part could be bolted to the flywheel with the open part out, and the surface could be smoothed and leveled as needed.  The size is about right.  Will need 8 to 12 inches for proper rpm on alternator- dont have it yet so not sure of driven pully diameter.  This calls for a trip to the junk yard.

Zeke

I don`t see why not provided you find one with meat in the right places to match the mounting arrangement on the Changfa flywheel.  You will have to make precision holes in the brake drum flat to clear and exactly intercept the centering tabs on the engine flywheel and the three associated mounting bolts.  A lathe will likely be needed to make the brake drum work including an OD cleaning and truing cut to make a precision belt run surface.  I wonder if you could find a finned brake drum that after a shave on the lathe would have a pattern to match a toothed gimler belt? 

[rbodell]

AhHah!!

A man who knows the secret of high intensity napping.

Zeke

Yes, I enjoy the company of non-judgemental pussy.  Here are my two darlings.  Mother (B&W) and her son Fluffy.  He is the mouser in the family but shy with people and she is the ambassador when we have guests.

The more people I meet, the better I like my dog and cat.

[biobill]

Zeke,
  How many rpms do brake drums opperate at? 1200 in smaller wheel sizes?  Certainly a large safety factor built in but after machining....
I'd hate to see one come apart at speed.     Bill

[mobile_bob]

a couple of options

get a steel brake drum off an allison transmission, the one mounted on the rear of the trans for the park brake
they are stamped steel and will take all the rpm you wanna throw at em.

or the small car drum will be ok, the brake lathe can turn down the outside for you just as easily as he turns the inside
you might look into some of his worn out rotors, some have hubs that are much thicker than drums.

what ratio are you trying to attain?
it would appear that the alternator you have chosen is going to have to turn what 5, 6 or 7000 rpm?

bob g

[rcavictim]

The nice thing about this community is how we have others with our own best interests at heart there to catch oversights.  I totally did not even consider the RPM considerations when replying to Zeke`s query about a brake drum pulley.  It was very late.

Thanx  biobill.

[Thomas]

I have seen small saw miles run on flat belts of the rear drum on old trucks there used to be a lot of them around in the small wood lots. Tom T

[Doug]

a couple of options

get a steel brake drum off an allison transmission, the one mounted on the rear of the trans for the park brake
they are stamped steel and will take all the rpm you wanna throw at em.

or the small car drum will be ok, the brake lathe can turn down the outside for you just as easily as he turns the inside
you might look into some of his worn out rotors, some have hubs that are much thicker than drums.

what ratio are you trying to attain?
it would appear that the alternator you have chosen is going to have to turn what 5, 6 or 7000 rpm?

bob g

Bob:

I'm still looking for something with a lot of weight to make 13 inch gen head pully.
Can you run off a sugestion or two for brake rotor or drum that might be a good starting point?

I'ver read this post a couple of times but its not realy sinking in.....
I had day surgery today and I'm in a bit of a fuzz, but I don't want to lose this thread so I'm jumping in lol ( actualy not so much lol, I'm not remotely near my best )

[rcavictim]

a couple of options

get a steel brake drum off an allison transmission, the one mounted on the rear of the trans for the park brake
they are stamped steel and will take all the rpm you wanna throw at em.

or the small car drum will be ok, the brake lathe can turn down the outside for you just as easily as he turns the inside
you might look into some of his worn out rotors, some have hubs that are much thicker than drums.

what ratio are you trying to attain?
it would appear that the alternator you have chosen is going to have to turn what 5, 6 or 7000 rpm?

bob g

Bob:

I'm still looking for something with a lot of weight to make 13 inch gen head pully.
Can you run off a sugestion or two for brake rotor or drum that might be a good starting point?

I'ver read this post a couple of times but its not realy sinking in.....
I had day surgery today and I'm in a bit of a fuzz, but I don't want to lose this thread so I'm jumping in lol ( actualy not so much lol, I'm not remotely near my best )

Doug,

I think for an 1800 RPM head your best flywheel pulley would be to have a solid disc flame cut from mild steel plate 2, 2-1/2 or 3 inches thick.  I can get you the name of an Ontario firm that specializes in this if you wish.  My machine shop owner buddy in Alliston deals with this firm and I could get such a thing in my hands without freight costs.  You could then get it from me.  Tell me what you need and I`ll get you a quotation.  My friend could put a broached center hole in it and turn the OD into whatever kind of pulley you need.

Glad you survived the operation.  I don`t know what they put you on but remarkably your spelling has actually improved!   

[Doug]

Sounds like a plan.....
I'll have to get back to you on that later.

Nurse told the wife I was a bad patient.
Seem to recall a lot of hands on me ( holding ) and some force used to gas me.
Don't know what they gave me several seringes of shut up an sleep now I guess ( wanted.... need to move stiff neck sore back ect ).