When faced with the need to cut a bolt that is sticking out of concrete, many people reach for a hacksaw. However, this can be a difficult and time-consuming task. A better option is to use a reciprocating saw. But, how to cut a bolt protruding from concrete with a reciprocating saw?
In general, to cut a bolt protruding from concrete first, mark the cutting line on the bolt with a pencil. Then, start cutting along the marked line. Once the blade has cut through the bolt, you can remove it from the concrete.
In this article, I will discuss how to best use a reciprocating saw to cut bolts protruding from concrete. I’ll also provide some helpful tips on blade selection. Let’s get started!
How to Cut a Bolt Protruding from Concrete with a Reciprocating Saw:
Here are some steps to follow when using a reciprocating saw to cut bolts protruding from concrete:
Step 1.
Turn off the power and remove the electrical cord. Always make sure your tools are turned off before you attempt any drilling or cutting task.
Step 2.
Use a carbide blade designed for masonry applications, if possible. A carbide-tip blade can cut through concrete much faster than a regular blade. However, you should be careful not to overheat or burn the blade as this may damage the tip. (You might be interested in How to Attach a Reciprocating Saw Blade)
Step 3.
If possible, use a hammer drill with a masonry bit to bore into concrete to create a starting hole for your saw blade. Note: This will only be an option if it comes with a side handle and depth-adjustment feature.
Don’t try using a standard electric drill because its motor is not built to withstand the torque required by these types of blades.
Step 4.
Once you have started cutting through the first layer of concrete, switch from your carbide blade onto a metal-cutting reciprocating saw blade that features high-speed rotation and ample power to cut through thick steel bolts. (Learn about how to control speed on the reciprocating saw)
A metal-cutting blade will also work for cutting through the second layer of concrete. Make sure to use a blade that is as wide as or wider than your saw’s throat opening so you can make a deep, clean cut.
Step 5.
After cutting through the first and second layers of concrete, switch back to your carbide-tip blade and finish cutting through the third and last layer of concrete.
Make sure not to overheat the blade because it may break during this operation. At this point, the bolt should be exposed enough for you to remove it by hand or with pliers.
Step 6.
Repeat Steps 1 – 5 until each bolt protruding from concrete has been removed.
Tips and Tricks:
If you are having trouble cutting through the first layer of concrete, try using a hammer drill with masonry bits to create a starting point for your blade.
Before switching blades, you may find it helpful to use a pry bar or chisel to break away at some of the more stubborn areas that are impeding the progress of your saw blade.
You can speed up the process by applying an oil-based lubricant onto bolts and bolts protruding from concrete before beginning your cut. Note: Never use an oil-based lubricant on carbide blades as this may damage them.
You might be interested in How To Rotate Reciprocating Saw
Safety Tips:
When cutting a bolt protruding from concrete with a reciprocating saw, it is important to wear the right safety gear and follow all necessary precautions. These include:
- Wear protective gloves and safety glasses when cutting bolts protruding from concrete.
- Step back if you notice any cracking of the surrounding concrete or chunks of gravel dislodging while drilling.
- Step back if you notice any cracking of the surrounding concrete or chunks of gravel dislodging while drilling.
- Keep fingers away from blades and saw triggers at all times. In addition, keep bystanders at a safe distance from the work area.
- In case the blade gets stuck in concrete, turn off the power immediately to avoid damage to both the blade and the saw. This can also cause injury to yourself or bystanders if it suddenly jerks back violently upon releasing tension from a stuck blade.
- In case the blade gets stuck in concrete, turn off the power immediately to avoid damage to both the blade and the saw. This can also cause injury to yourself or bystanders if it suddenly jerks back violently upon releasing tension from a stuck blade.
- When finished, turn off the saw and wait for the blades to come to a complete stop before placing the saw down or putting on safety gear.
Conclusion:
In this post, I showed you how to cut a bolt protruding from concrete with a reciprocating saw. If you’re faced with a similar situation, be sure to follow these steps for the best results. Have any questions or comments? Let us know in the comment section below!
FAQs:
What type of blade should be used to cut concrete?
When cutting a bolt protruding from concrete, it is typically best to use a metal-cutting reciprocating saw blade. A metal-cutting blade will also work for cutting through the second and third layers of concrete.
What type of blade should be used to cut bolts?
Cuts on bolts can be made with either carbide or metal-cutting blades, but it is usually best to use a metal-cutting blade.
How often should the blade be changed?
When cutting a bolt protruding from concrete with a reciprocating saw, make sure to change your blade as soon as you notice nicks or serious damage on its surface. This is especially important if you are cutting through thick concrete. (Learn about how to change a Ryobi reciprocating saw blade)
How deep should the blade be set when cutting concrete?
For cutting bolts protruding from concrete, it is typically best to set the blade as close to the surface as possible. This will cut through the first and second layers of concrete without requiring you to plunge too deeply into the third layer.
What are the dangers of cutting a bolt that is protruding from concrete?
When cutting a bolt protruding from concrete, it is important to remain aware of the blade’s proximity to your hands and face at all times. Also, make sure that bystanders are kept at a safe distance.
Can this job be done with an angle grinder?
When cutting bolts protruding from concrete with an angle grinder, the job will be completed much more quickly as opposed to taking the time to use a reciprocating saw. In addition, an angle grinder is less likely to cause flying debris that could potentially injure your hands or face.