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Tool for recessing screw head on steel trunking cover

houstonceng

Hi all.  I’m installing some steel trunking and need to create the recess/ dimple/ sewage in the covers to fit the turnbuckle screws.   I know there is a tool to do this, but cannot find one when searching t’internet.  It’s similar to a screwed hole punch in that the bolt goes through the 10mm hole and you wind it in so that the domed male side pushes the cover material into the female die to create the recess.  Does anyone know the correct name for the tool, or who makes it, or where I can buy one?

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  • 0

    Sounds like you need a nut, a bolt and some correctly sized washers. Thinking small washer one side slightly bigger than the screw head. A big (penny) washer the other side with a hole that is bigger than the small one on the other side. Then a few more washers to fit the nut/bolt head. Once centred you can glue them together.to make the two halves. 

  • 0 in reply to OlympusMons

    Thanks for the suggestion.  I think the washers would present too sharp an edge and probably act like a Q-Max punch.  If necessary, I can make a tool by turning on my lathe.  Just thought it would save time and, probably, money, to buy the correct tool ready made.

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  • 0 in reply to OlympusMons

    Thanks for the suggestion.  I think the washers would present too sharp an edge and probably act like a Q-Max punch.  If necessary, I can make a tool by turning on my lathe.  Just thought it would save time and, probably, money, to buy the correct tool ready made.

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