Dremel - All Purpose Penny Cutting Blade




About: I live in New England and currently have two degrees, one in Electronic Engineering and the other in Electrical Technology. I love building and tinkering whether its with wood, metal or electronics its all g...

This instructable shows the process of making your own all purpose cutting blade for a Dremel made from a penny.

The main purpose for this tool was to cut out the plastic in this 8000 Lumen LED flash light instructable that can be viewed HERE

Step 1: Materials and Tools


Metal Bandsaw or Hacksaw - to see my homemade table bandsaw instrucable click HERE


Drill press and bit



Center finder

Center Punch


coin or round steel

Dremel cutting wheel bit

Step 2: Preparation for Drilling

- Grind or Sand he penny/coin flat

- Find the center using a jig

- Mark the center using a center punch

Step 3: Drilling and Designing

- Drill the hole in the center

- Draw a saw blade like pattern using your pencil

Step 4: Cutting and Shaping

- Cut the shape out using a metal Bandsaw, hacksaw or file.

Step 5: Video Results

Enjoy! Be Safe this is a very dangerous tool! use appropriate safety precautions

I made this tool to cut plastic when I was making an 8000 lumen LED light



    • Build a Tool Contest

      Build a Tool Contest
    • Warm and Fuzzy Contest

      Warm and Fuzzy Contest
    • Sweet Treats Challenge

      Sweet Treats Challenge

    7 Discussions


    4 years ago

    BE CAREFUL. Pfred2, I actually tried that with an electrical box knockout (ironically, before I even found this article). My "blade" cut wood really well until the shaft snapped and sent the the spinning blade of death straight towards my face. Luckily it didn't hit me in the eye, but I ruined a shirt from all the blood. I would recommend not doing this


    4 years ago on Introduction

    That cut wood surpisingly well, but I still have images of high speed shrapnel as soon as you encounter a knot or hidden nail.

    3 replies

    Reply 4 years ago on Introduction

    Those are the risks you always take when you use power tools I suppose. Their pennies are obviously made out of better stuff than ours are. Here in the USA pennies are made out of copper plated zinc now. I do not think they could cut through much more than foam. After seeing the video I am about ready to get an electrical box knock out here and try this out for myself.

    Ryan Depacepfred2

    Reply 4 years ago on Introduction

    That would work perfect! I'm from the USA but for some odd reason there was foreign currency laying around the garage haha. Let me know how it comes out and be safe!

    - Ryan

    Ryan DepaceKiteman

    Reply 4 years ago on Introduction

    I hear you an that. Its a little sketchy using this but I needed to remove some plastic for a another instructable I was making. I ran out of Dremel blades and noticed a penny sitting in front of me and decided that would be adequate.


    4 years ago on Introduction

    Good idea, but maybe a penny is a too soft metal to do a tool like this. Try to make it in mild steel.

    1 reply
    Ryan Depacerimar2000

    Reply 4 years ago on Introduction

    Yeah when I have time I will make a blade using a harder material. I was in a rush and a penny was strong enough for me just to cut plastic. Thanks

    - Ryan