MD 180 Broken Mast

[ful-rac]

The mast was pretty hard, but like Shane said low speed, and also taking your time to get your drill centered as close as possible really helps. Starting with a small bit and stepping it up to a larger bit several times takes time so you have to be patient. At least it wasn't as bad as an exhaust stud...compared to one of those this one was a piece of cake...

...another thing that made this project challenging, is that the broken piece was recessed back into the sprocket about an 1" or 1 1/2...

Makes me wonder if Hobie were to score the mast an inch or so below the end of the sprocket to make a point where if the mast were to fail it would fail in a manner in which you could replace it without the use of special tools....Of course that would make a weak point...but that is the point...just a thought. It's alot cheaper replacing a mast as opposed to replacing complete spine assemblies...

[kirkdavis]

Originally Posted by ful-rac

The mast was pretty hard, but like Shane said low speed, and also taking your time to get your drill centered as close as possible really helps. Starting with a small bit and stepping it up to a larger bit several times takes time so you have to be patient. At least it wasn't as bad as an exhaust stud...compared to one of those this one was a piece of cake...

...another thing that made this project challenging, is that the broken piece was recessed back into the sprocket about an 1" or 1 1/2...

Makes me wonder if Hobie were to score the mast an inch or so below the end of the sprocket to make a point where if the mast were to fail it would fail in a manner in which you could replace it without the use of special tools....Of course that would make a weak point...but that is the point...just a thought. It's alot cheaper replacing a mast as opposed to replacing complete spine assemblies...

If the threads start that deep in the sprocket, it should reduce the cyclic stress where it broke, so I agree that there was something wrong with the part from the factory.

[alanw]

Originally Posted by kirkdavis

If the threads start that deep in the sprocket, it should reduce the cyclic stress where it broke, so I agree that there was something wrong with the part from the factory.

Or there is too much play between the mast and housing, or the housing flexes too much, and there isn't enough support past the threads. Or, Tony is just a beast.

[kirkdavis]

Originally Posted by alanw

Or there is too much play between the mast and housing, or the housing flexes too much, and there isn't enough support past the threads. Or, Tony is just a beast.

Well said.


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[Raskal311]

No covered under warranty?

[Iceman]

[No covered under warranty?

I gave Tony the masts...............on me.

[ful-rac]

Originally Posted by Raskal311

No covered under warranty?

Yes, Andy did supply me with the new masts. Hobie and Andy (OEX) have stepped up and taken care of me many times before, as well as all other Hobie owners.

...Good reason to buy your Hobie from OEX!

[octico]

Originally Posted by ful-rac

Yes, Andy did supply me with the new masts. Hobie and Andy (OEX) have stepped up and taken care of me many times before, as well as all other Hobie owners.

...Good reason to buy your Hobie from OEX!

+1

[makobob]

Originally Posted by ful-rac

Yes, Andy did supply me with the new masts. Hobie and Andy (OEX) have stepped up and taken care of me many times before, as well as all other Hobie owners.

...Good reason to buy your Hobie from OEX!

REMEMBER guys TONY is Hobies stress tester, he is HARD on drives and other equiptment. Great job on the repair Tony. NOW go molest some moore BUTT.