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Attaching the Drilax Flexible Shaft to a Rotary Tool


1- First, if is your rotary tool has a threaded collars on the motor end, you will need to remove it by turning ccw (counter clock wise). You will need the collar when you attach a tool directly to the rotary tool. You will not need it with the flex shaft.

2- Hold the flexible shaft by the silver color fitting end (you will be able to see the inner shaft core). And pull the inner core about 2 inches. If you need a pair of pliers to hold it, that’s normal.



3-Now, the idea is you are attaching the core of the flex shaft into the rotary tool collet just like you would attach any kind of tool with a 1/8″ shaft. The flex shaft is there to transfer the rotation, that’s it. It is just like an extension. Push the core of the flex shaft into the rotary tool collet and tighten the collet. You can use the collet lock button to prevent it from turning while you are tightening the nut.

4- You can now screw the silver color fitting end of the flex shaft onto the  rotary tool housing. This is where you removed the collar. We are not done attaching the flex shaft to the rotary tool. From now on, the next steps are about attaching the bit or burr to the flex shaft.


5- The other end (BLACK COLOR) of the flex shaft is where you will insert the desired attachment tool such as a diamond disc or a burr. You will be using the silver chrome L shaped piece for this stage. There is a hole on the side of the black side of the flex shaft. And there is another hole under the black side. When you align these two holes by turning the silver tip on the black end, insert the L shaped metal. This step may sound confusing but it’s simple. The inner metal part on the black end of the shaft will want to turn as you try to attach the tool. The L shaped metal is there to help you hold it while you try to twist the tip.



6- You can now attach the bit. And tighten the nut at the tip of the black end of the flex shaft. 

Tool attached to flex shaft
Tool attached to flex shaft



2 thoughts on “Attaching the Drilax Flexible Shaft to a Rotary Tool

  1. I have a set of 30 pc. 1mm diamond drills I purchased from the internet (Amazon, I think) #X000XA0F53. I am looking for additional 1mm diamond drills of 1mm size. AND, I need angled diamond drills with a sharp point and a 1/8″ shaft. Can you please advise? I can’t even find the 1mm 30 pc. drills on your web site. Thank you

    1. Hello and thank you for your comment.
      The diamond coated drill bits with sharp points are a bit different.
      Here are two different sets that may be the answer:
      Set of mixed sizes from 1mm to 2.5mm, all diamond coated and sharp tip:
      Set of 1mm :

      Here are some helpful tools to solve the shank problem, these will help you hold tiny drill bits with very thin shafts:
      Mini Chuck Adapter:
      Set of brass collets:
      Mini Chuck – collets set:

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