how to drill out stuck PTO shear bolt?

[repete]

For implements that don't get used all the time and therefore have an higher risk of the clutch discs getting rusted together, I would rather recommend the shear bolt, but the style in the picture below.

Super easy to use and you can replace it in less than 1 minute with two simple wrenches.

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I like this style as well.
Even if the implement with a clutch is used frequently, it MUST on occasions be allowed to slip to keep clean. I like to use my rotary in heavy heavy stuff every once in a while just to confirm it slips. If you take some paint and draw a line across the clutch you can see if it slips. You can also use one of the point and shoot thermometers to look for heat if it is slipping. If you see heat under a light load it needs some adjusting.

 

[LouNY]

For implements that don't get used all the time and therefore have an higher risk of the clutch discs getting rusted together, I would rather recommend the shear bolt, but the style in the picture below.

Super easy to use and you can replace it in less than 1 minute with two simple wrenches.

View attachment 4580104 View attachment 4580105

That is shear pin yoke, many different ones are available. with different sized bolts and differing lengths from the shaft center to the shear bolt location. this provides for many different torque ratings for the shear force.

The straight thru or conical tapered bolts through a hub and shaft are not proper shear bolts they are attaching bolts being improperly used.

 

[LouNY]

Some of my PTO shaft components specify grade 8 bolts for shear points.
Seems counterintuitive, since light duty homeowner equipment usually specify soft grade 2.
The grade 8’s do work, they shear clean, with a bang

Correct, they shear with a clean snap and no deformation.

 

[joecdeere]

We always backed the tension off the slip clutches in the fall on equipment that was done for the year. In the spring as things were first used we lit up the clutch real good allowing the rust and corrosion to be worn off before readjusting the tension for normal use.

 

[not2old]

I've heard it said,......

Use a grade five bolt, they shear off more cleanly and don't result in the distorted bound up mess as this example shows.

But who really knows, that could be a grade 5 bolt, and the shaft and collar holes may be all wallowed out.

One of the implements I bought came with specific instructions to use a grade two bolt.