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Old Apr 21, 2011, 09:40 AM
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USA, CA, San Diego
Joined Oct 2007
762 Posts
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Heliworx head modded for 2/56 set screws

I just completed this set screw mod on the heliworx head.

First picture is Heliworx head being drilled with #50 size drill for 2/56 stainless set screws.

Second picture shows the tapping process. The hole needs to be drilled perfectly straight and you have to be sure and tap the hole straight as well.

Third picture shows me spinning the head up to speed after I spent some time getting this mainshaft straight again. I have a procedure for this using a block of hardwood in my vise. This one is using the shorter 48mm mainshaft. I straightend the mainshaft for free in this case.

Forth picture shows a side by side comparison of my head next to the Heliworx head, not much difference between the two. They perform the same task but I made mine for 2.50$ in parts.

This mod makes it much easier to remove the head. It also eliminates the use of the pin which can be a real pain to remove. That is why this head was sent to me in the first place. I had to get the pin out first which was not easy, seemed to be stuck in there a bit.

I can do this mod for 12 dollars plus shipping. You couldn't do this mod yourself for less because the drill and taps plus the 2/56 set screws plus shipping would cost you more than that. Not to mention the machine work plus the precision and expertise required. I am in fact the one who originally came up with this idea of using set screws in place of the pin.

This is a very worth while mod because everytime you bend the mainshaft you will most likely need to remove the mainshaft to replace it or get it straight again. Dealing with that pin everytime is a royal PITA and tends to slowly beat up your nice expensive Heliworx head.

If you have a Heliworx head this is the mod you want.
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Last edited by chevell; Jun 29, 2011 at 06:38 PM.
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