Repair or replace?

[Elektrishun]

Hello

I found hairline crack on the main pulley driven directly by the motor:

The tapered pin seemed easy enough to remove but that doesn't matter now. Any suggestions on what would be the best way to repair the crack or is replacement the better option?

Thank-you

 

[whydontu]

Unless it's for aesthetics, I doubt there's any reason to replace or repair. But I'm really cheap...

 

[Elektrishun]

I am wondering what kind of forces can be generated at that weak point and is there the possibility of some additional vibration being created?

 

[FatherWes]

Is this on a 1/2 HP drive, or a 50 HP system? 100 RPM or 7000 RPM? Is the pulley 4 inches in diameter or 40?

 

[DavidR8]

If the pin is installed and goes through the full axle and the other side of the hub then I would not worry

 

[Tom O]

I wouldn’t worry too much about it, the tapered pin still goes through the shaft and the other side of the collar so it shouldn’t give a problem, if I was worried about it I’d cut a groove down the crack and braze it. Or even easyer drill another hole 90 deg to it and use a taper reamer to size for the pin.

 

[TorontoBuilder]

Hello

I found hairline crack on the main pulley driven directly by the motor:

View attachment 53587View attachment 53588

The tapered pin seemed easy enough to remove but that doesn't matter now. Any suggestions on what would be the best way to repair the crack or is replacement the better option?

Thank-you

If I'm correct, the pin hole will prevent the crack from spreading. So I'd not perform any intervention

 

[DPittman]

if I was worried about it I’d cut a groove down the crack and braze it.

THIS

 

[Proxule]

If you are Edmonton local, I will dye pen it for you, Chase and grind out the offending crack and fill with some braze for you.
No charge.

GLuck

 

[Jayham]

I would repair or replace. If you look closely at the first picture. There are several cracks radiating outward from the 12, 2,3,6 o'clock positions.

 

[DavidR8]

I would repair or replace. If you look closely at the first picture. There are several cracks radiating outward from the 12, 2,3,6 o'clock positions.

Hmmm not seeing those other cracks.

 

[Jayham]

Hmmm not seeing those other cracks.

They aren't fully through but are there

 

[cjmac]

Hello

I found hairline crack on the main pulley driven directly by the motor:

View attachment 53587View attachment 53588

The tapered pin seemed easy enough to remove but that doesn't matter now. Any suggestions on what would be the best way to repair the crack or is replacement the better option?

Thank-you

Another approach to consider would be turning the od of the hub so it is cylindrical and make a collar to clamp over the hub. It could be one piece with one tightening screw or two piece with two screws (probably better). Just make the collar, drill and tap for the screws and cut the collar in half at the centerline at rt angle to the screws.

Chris

 

[TorontoBuilder]

They aren't fully through but are there

trace the destination of those cracks... even if they cause a bit of cast iron to break away the parts will still function and the cracks can only go outward

 

[Darren]

Put a shaft collar on it and call it a day.

 

[Elektrishun]

Is this on a 1/2 HP drive, or a 50 HP system? 100 RPM or 7000 RPM? Is the pulley 4 inches in diameter or 40?

10" diameter pulley driven by 3/4 HP motor.

 

[Elektrishun]

If you are Edmonton local, I will dye pen it for you, Chase and grind out the offending crack and fill with some braze for you.
No charge.

GLuck

I am in Saskatoon but I appreciate the offer.

 

[Elektrishun]

Put a shaft collar on it and call it a day.

View attachment 53590

I see what you're referring to. Good idea.

 

[Darren]

Drill relief holes in the shaft collar. They are soft steel.

 

[Elektrishun]

Drill relief holes in the shaft collar. They are soft steel.

I am assuming the you meant to use the collar tie to clamp directly over the damage pulley end - correct? Where would the relief holes be needed?