Introduction: DIY Kettlebells for Under $10
While looking for ways to change up our current workout program, I came across the Russian Kettlebell. Kettlebells are typically cast iron "cannonballs" with handles. They provide a great, well-rounded workout for strength training as well fat loss. The only downside to Kettlebells that I could see was their cost. Expect to pay anywhere between $2-4 / lb. for a Kettlebell. A 20lb Kettlebell will easily cost you $50.
Looking for an inexpensive option, I ran into an article posted to a CrossFit forum (http://www.crossfit.com), which provided details on how to build an inexpensive Kettlebell. I have since built 5 Kettlebells of various weights and have been extremely impressed by the durability of the product as well as the options we now have when working out at home.
Kettlebell exercises employ a wider range of motion than traditional dumbbells and typically involves swinging and explosive movements that utilize the full body. Because the weight is off-center from the handle, the movements demand greater stability and really target the core muscles.
Step 1: Materials & Tools
-1 bag quikrete pre-mixed concrete mix
-1 cheap rubber ball (under $5)
-26" of 3/4" or 1" PVC (sch40)
-Small quantity of sand
-1 Hacksaw or Jig Saw
-1 Heat Gun or Oven
-1 Bucket (for mixing)
-1 Small Garden Spade or similar tool (for mixing and transferring concrete to the ball)
-1 Pair of Scissors
Step 2: Prepping the Handle
The handle used for these Kettlebells is made from PVC pipe which has been heated and bent to form. I have found that 3/4" PVC (sch 40) has been sufficient for smaller weights (10 - 20 lbs.), while I've opted for 1" PVC for larger weights. To save costs on these builds I've begun using PVC Conduit (for electrical installations). Originally I had used Plumbing PVC (potable), but found the PVC Conduit to be at least half the cost of the Potable type.
For sizes & weights, I have found that a mini basketball (Size 3) will end up around 13 lbs. or so, while a full sized basketball will be just under 30 lbs. You can also adjust the weight of the Kettlebell by adding in less/more dense items (ie. lead or steel shot or washers, etc to increase the weight, or packing peanuts or similar to decrease the weight).
Use the hacksaw to cut the PVC to a 26" length. Depending on your preferences you may want a bigger or smaller handle, but I've found that 26" makes a comfortable sized handle.
Use Duct tape to cover the opening of one end of the PVC.
Fill the PVC pipe with sand.
Once packed full, use Duct Tape to seal the other opening of the PVC.
The sand is used to keep the PVC from losing its roundness when being heated up and shaped.
Step 3: Forming the Handle
Once the PVC has been filled with sand and sealed with Duct tape, it is ready to be heated and formed.
There are two options that I've tried and both have worked well. The first is to use a heat gun to heat the PVC until it is pliable enough to bend and form the handle shape. The other is to use an oven. With the oven method, I would wrap the PVC with tin-foil, place it on a baking sheet and heat it at 350F for 10min. After that, the entire length of PVC is soft and ready to be bent.
Whichever method you use to heat the PVC up, you would then either bend it by hand (using oven mitts for protection) or use a template to wrap the PVC around to create the shape you want. Ultimately you want the PVC to be shaped like a triangle with nicely rounded corners.
Once the PVC has been bent, you need to keep it in this shape until the PVC cools again. Dipping the pipe in cool water will help speed this process up.
Once cooled, you have yourself a handle.
NOTE: if you are not happy with the shape of the handle, simply use a heat gun to re-heat the area of concern and re-shape it again.
Step 4: Prepping the Ball
With the handle complete, it's time to move on to the ball.
You need to cut the ball open so that the handle can sit half-way inside. The ball is being used as a form for the concrete as well as a nice rubber coating for the finished Kettlebell.
Cut a slit in the ball long enough to sink the handle to a suitable depth inside the ball. Be sure to insert the handle as a test to ensure the length of the slit is correct. Once the slit is complete, cut two (2) circles at both ends of the slit. The PVC pipe will sit within these circles. The slit will then be used as an opening to fill the ball with concrete and will allow the flaps on both sides to cover up the concrete on the finished product.
Note: This latest build was for the wife (hence the pink & white ball).
Step 5: Completing the Kettlebell
With the ball and PVC handle ready to go, you can move onto the last step: filling the ball and inserting the handle.
Pour enough Quikrete into your bucket to roughly fill the ball. Don't worry about being too exact, if you have a little too much, oh well. If you don't have enough, just mix some more.
Add just enough water (a little at a time) to the bucket and mix until the concrete mixture is a thick paste. Make sure it isn't too runny. If it is, just add more Quikrete to balance things out again.
Once your Quikrete is mixed to the correct consistency, use a small garden spade or similar tool to spoon the concrete mixture into the ball.
While you're filling, press down on the ball to create a slight dent in the bottom of the ball, this will keep the finished Kettlebell flat on the floor and will keep it from rolling around when you set it down.
Once the ball is mostly filled, insert your handle and set it to a comfortable depth.
Continue adding concrete until the ball is full. Make sure to shake the ball and lightly tap it on the ground to get the concrete settled to the bottom.
Once the ball is filled, check that your handle is still at your desired depth and is also nice and straight.
Once everything checks out, give the ball a quick wipe with a damp cloth to remove the excess concrete and let the concrete set for at least 24hrs.
After the 24hr set, wipe your Kettlebell down once more and you're ready to start swinging.
Step 6: Resources & Credits
Photos and Descriptions of Kettlebell Exercises by Mike Mahler
Kettlebell Videos (Youtube)
Picture 2 on Intro credited to JohnCalnan (Flickr) - Some Rights Reserved (see link for licensing info) - (Link)
DIY Kettlebell inspiration credited to Matt Charney on the CrossFit.com forum - (Link)
2 years ago on Step 5
easiest way to bend pvc is put sand in the oven at 350 degrees till it reaches 350 and pour it down tube..
7 years ago
I just made three with one bag of concrete and 3 balls I picked up at the the local goodwill. I didn't use PVC though. I used some left over electrical piping that I could bend/shape. I screwed in a couple screws at the end too. I haven't weighed them yet but guessing they turned out to be ~5 lbs, ~10 and 15 lbs. I had some trouble completely filling the large basketball. The top kept folding over.
7 years ago
Get some steel cable (aka wire rope) and run it through the handle and into the concrete. PVC is too fragile for years of weighted swings and snatches. If that handle breaks at the wrong time, it's a potential injury.
8 years ago on Introduction
Thanks for this. I have added this to the Diy list thing my son and I will bond over the coming year.
10 years ago on Introduction
One way to help if you are worried about the handle slipping out is to drill some screws into the pvc close to the ends. This will give your pvc handle "fingers" into the concrete and should keep it from slipping out.
Reply 8 years ago on Introduction
genius !!! thanks
9 years ago on Introduction
Nice job! I've made several versions of kettlebells myself. I've used pvc handles before but always joined pieces together with fittings and run a chain and concrete through the inside to keep it together. Never thought of heating the pvc to bend it. that's a good idea. To date, though, my favorite handle is re-bar run through black high-pressure hose and bent to the desired shape. Ends are bent a bit so they take a reliable hold in the bell. Those puppies will hold a lot of weight reliably.
11 years ago on Introduction
75lb kettlebell might be tricky - but you'd save yourself a ton of $ if you do figure something out!. I know that I plan on using some of my old non-olympic style plates to beef up the weight of a few of these by putting the 5-10lb plates on the bottom & crete on top of that. I also plan on using a bit of some used roof rubber that I have laying around to pad the bottoms. Great instructable!
12 years ago on Introduction
this is a great instructable, kudos. Definitely gonna do this, one suggestion though (pvc electrical conduit is weak stuff), filling the pipe itself with concrete should make it more than strong enough to withstand anything you can throw at it, especially if you know you're going to be a bit rough on your weights.
But again, great instructable.
12 years ago on Introduction
I want to make one with a full-size basketball, but I am concerned about the handle falling out eventually. How has yours been holding up?
Reply 12 years ago on Introduction
I've made a couple with full sized basketballs and have not had any problems with any of them. I went with a slightly larger diameter pvc. Also, you'll want to make the handle slightly bigger too so it sits deep enough into the concrete. I think they end up around 25-30lbs or so. Good luck with your build.
12 years ago on Introduction
I want a 75 lbs kettlebell, but it seems like I'm just gonna have to buy a legitimate kettlebell to get one