How To Make a Boxing Cobra Punching Bag Using the K-Spring


This is the one you've all been asking for!!! Finally a spring-based DIY boxing cobra punching bag like the one Ryan Garcia uses that you can now make yourself at home.

To make it super easy I designed and produced a custom spring specifically for this purpose. I made it so that you can simply screw it onto a 3/4 inch galvanised steel pipe.

If you have any questions please put them in the comments below and I'll respond as soon as I can. Also please share your thoughts and experience with others here if you make one.

Items You'll Need:

  1. Kewlus Spring Top Section Kit - purchase here:
  2. Base pipe: galvanised 3/4 inch pipe to suit your height. I used a 3 foot long pipe for my height (I'm 6ft tall). The 3/4 inch pipe has an outer diameter that is exactly 1 inch. The spring is designed to fit onto this pipe. You can also combine sections of pipe using a coupling, for example 2ft section and 1ft section.
  3. Umbrella base - for indoors I recommend a concrete one. For outdoors a water-filled umbrella base would be ok. You can also make your own Base/Stand to save some coin:
  4. Roll of duct tape. Nothing fancy, just get a cheap one.
If you just buy the spring, not the Top Section Kit, you'll also need:
  1. Length of 3/4 inch PVC pipe - you'll need 2 foot length.
  2. One or two pool noodles. One might be enough, but if you can, get a couple. The diameter of the hole should be less than 1 inch so that it fits tightly onto the 3/4 inch PVC pipe. As an alternative you can also use pipe insulation foam which is similar to a pool noodle but just comes in black colour.

6-Step Instructions:

  1. Cut a section of pool noodle to use of your punching bar. I recommend about 14 inches. Wrap it in duct tape to give it a nice vinyl finish. Create a couple of contours by wrapping tighter in a couple of areas - this is where your targets will sit. This is your punching bar.
  2. Take the remaining section of the pool noodle and slice it in half lengthwise using a knife. Wrap one of the half-sections around the punching bar, forming a circular shape. Cut off the access and tape around it with duct tape. This is your target.
  3. Setup your umbrella base by removing the plastic insert from the top of the base pipe. Wedge one of the remaining offcuts of the half-sections of pool noodles into the umbrella base pipe. Wedge your galvanised steel pipe into the umbrella base and tighten the side screw so that it is nice and tight and there is no sideways movement in the galvanised pipe. The pipe should reach roughly to your hip.
  4. Screw the Kewlus Spring onto the galvanised pipe in a clockwise direction so that it overlaps the pipe by one inch. Tape around the connection with duct tape for safety.
  5. Measure off and cut 20 inches of 3/4 inch PVC pipe. Screw that into the top of the Kewlus Spring, also overlapping by one inch. Tape the connection with duct tape for safety.
  6. Insert the punching bar onto the PVC pipe.
Good luck making it and hope you enjoy! If you have any questions feel free to ask them in the comments below.

Related Videos:

How To Make a Boxing Cobra Punching bag using the Kewlus Spring (17 Oct 2020) -
DIY Base/Stand V2 - for the Boxing Cobra Bag (10 Aug 2020) -


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