What is this crankshaft size?

[chaddiablo]

I just bought an engine for my buggy.
And it doesn't say how big the shaft is.
I tried measuring how big it is by using a dial caliper, but it says it it 9/10 of an inch.
I'm trying to put a clutch on the crankshaft, but they only come in sized 5/8 3/4 and 1 inch.

What clutch size should I use?

Thanks.

 

[KieranM]

what engine is it?

 

[chaddiablo]

http://www.brandnewengines.com/216315-0111.aspx

Briggs and Stratton 16 hp.

 

[devino246]

Well theres your problem. Your engine has a tapered shaft.

 

[chaddiablo]

Lol I know that. I have an adapter for the tapered part. Im wondering which clutch size?

 

[KieranM]

I think the non tapered 16hp had a 1inch shaft which a comet 40series suited not too sure about 9/10 shaft....

 

[devino246]

Measure the shaft using you dial caliper again and tell us the exact measurement you come up with.

 

[Russ2251]

.984 (or 63/64's) is more likely and is also more workable.

 

[r97]

remember that if you have an adapter that slips over the shaft, the clutch will need to fit the adapter, not the shaft. if you already have the adapter why measure the crank?

 

[chaddiablo]

Measure the shaft using you dial caliper again and tell us the exact measurement you come up with.

I measured with a inch/mm caliper. And this is what I got:

By measuring on the inch side. It is on the 9 exactly.

 

[airsoft_warrior]

Lol I know that. I have an adapter for the tapered part. Im wondering which clutch size?

Sorry to thread jack, but where do you get an adapter for the tapered shaft? here is my thread to see my engine and the shaft. Thanks.

http://www.diygokarts.com/vb/showthread.php?t=9449

 

[redsox985]

Can we see some photos of the shaft, shaft with sleeve, and calipers measuring both?

 

[chaddiablo]

Lol woops photos too big.

 

[redsox985]

Have you tried turning on the micrometer to get EXACT numbers? You can put a key way in it but that's such a strange size.

 

[Russ2251]

Have you tried turning on the micrometer to get EXACT numbers?

Digital read out.

 

[redsox985]

My point exactly Russ.

 

[Russ2251]

I know...some folks just need it spelled out. I was not questioning you at all.
I've dealt with close tolerances (4 or more decimal points) all my life.
"About" or "Around" doesn't cut it.

 

[devino246]

Have you tried turning on the micrometer to get EXACT numbers? You can put a key way in it but that's such a strange size.

Theres no use in having a digital mic if your not even gonna turn it on!

 

[KieranM]

Just to clear up its a vernier callipers not a micrometer.....but what ever you call it turn it ON

 

[Doc Sprocket]

I want to see this adapter!