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Old 03-13-2010, 12:52 AM   #1
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Default 30 amp dongles

I have this Hoffman 16x14 stainless box, to control my rig which is in high build phase. I intended to put 2 30 amp twistlock outlets on it, which involved attempting to drill 2&1/8" holes with a bi-metal holesaw on a drill press. DON'T TRY THIS! The stainless on these is SO incredibly strong that it just ate the bit and made a big ugly spot.

So here is my solution:



30 amp dongles! All I had to do was drill 7/8" holes in the bottom with a step bit and install these cord grips with the rubber sealing gaskets. Something to consider if you're cutting your own box.

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Old 03-13-2010, 01:00 AM   #2
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looks great. not that you would have it around but greenlee make SS hydraulic punches for all sizes. Sure they are not cheap but maybe a rental item.

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Old 03-13-2010, 01:04 AM   #3
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Try a step bit and some cutting oil when working with stainless. It heats up and hardness fast.

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Old 03-13-2010, 01:04 AM   #4
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Tried hunting for those but hard to find over 2", and yeah they get horribly expensive. I scored a 1.25" for my elements, a 1 3/8 for those 110v outlets. I LOVE the greenlee punches.

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Old 03-13-2010, 01:05 AM   #5
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Quote:
Originally Posted by IrregularPulse View Post
Try a step bit and some cutting oil when working with stainless. It heats up and hardness fast.
Can you actually get step bits over 2"? I can only find them up to 1 3/8".
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