counterbalanced crankshaft what make??

[amesbuilt]

Hi,
Recently, dug this out of the shed.
Included are the markings on a counterbalance crankshaft. Does anyone have an idea who made this?

thanks
Kevin

[speedytinc]

Shermike. They made 3 versions. Not enough seen to determine which one.

[Erik Barrett]

Sure break crank. Hang it on the wall.

[speedytinc]

Sure break crank. Hang it on the wall.

Amen.........

[elliott1936]

Been there and done that Tom

[23ford]

Got 2 around here been running them for over 30 years no problems.

[SurfCityGene]

I'm sure there is another SureBreak crank that has been running for nearly a hundred years BUT unfortunately one of our club members recently rebuilt his engine not knowing the reputation with a SureBreak crankshaft that had been checked out.
It broke in a very short time of driving! Was a sad learning experience that he didn't know before so he could have made an informed choice.

[JTT3]

What about this dandy?

[RajoRacer]

Looks a might short John !!!

[SurfCityGene]

Now that one looks pretty nice. it's got some scarring near the front seal and pulley but looks a little short on the back end??
I have a couple of cranks here in the shop with the same problem!

[J1MGOLDEN]

[JTT3]

Yep that one left a mark. Approximately How much JB WELD will I need to repair it properly? Jim the 4 attributes should be:
More power
More Speed
More POP
More engine pulls

[ModelTWoods]

Shermike. They made 3 versions. Not enough seen to determine which one.

John, How can a person tell them apart? I have two, one in a running engine and a spare. I'd like to know if the spare is one of the better ones.

[Joe Bell]

years back I checked the metallurgy of them and they where high Cromium in them like the Dodge Bros. cranks.

[speedytinc]

Shermike. They made 3 versions. Not enough seen to determine which one.

John, How can a person tell them apart? I have two, one in a running engine and a spare. I'd like to know if the spare is one of the better ones.

The difference is the size of the counter weights. I believe the "short" one shown is the best #3. #2 are a smaller dog bone shape. #1 has very little counter weight. This is from research basically looking @ aftermarket adds long ago.

[ModelTSpeedster]

Any ideas on the make of these two? At this time they are wall hangers, so if anyone can shed light on whether or not they are worth the $$ and time to finish them I would appreciate the info.

[ModelTWoods]

Shermike. They made 3 versions. Not enough seen to determine which one.

John, How can a person tell them apart? I have two, one in a running engine and a spare. I'd like to know if the spare is one of the better ones.

The difference is the size of the counter weights. I believe the "short" one shown is the best #3. #2 are a smaller dog bone shape. #1 has very little counter weight. This is from research basically looking @ aftermarket adds long ago.

John, Where are the pictures (#1, #2, #3) that you mentioned?

[speedytinc]

I think From various accessory books. Its been a while. Past vintage fords likely. Also in various accessory compilation books.

[got10carz]

My understanding from old timers, is that there are 2 different counterbalanced cranks. 1 that is prone to break, and 1 that (can't) be broke.
I have no idea how you tell the difference. Wished I knew.
I have 1 that I got used that has 5,000 miles at 60 MPH and still going.