Jigsaw blades wear out, bend, or break—especially when you’re cutting tough materials or switching between wood, plastic, or metal. (Not sure if your jigsaw can handle metal? Here’s what to know.)
And not every blade fits every jigsaw. Some use T-shank blades, others use U-shank. Clamp mechanisms also vary—so it’s good to know how yours works before swapping blades.
In this post, I’ll show you exactly how to change a jigsaw blade step by step, using my Bosch GST 150 BCE. You’ll also learn about blade types and clamping systems, so you can make safe and confident replacements every time.
⚠️ Tip: Always unplug your jigsaw (or remove the battery) before touching the blade.
Table of Contents
- General Blade Replacement Questions
- Most Common Reasons to Change a Jigsaw Blade
- Jigsaw Blade Types
- Jigsaw Blade Clamp Mechanism
- How to Change a Jigsaw Blade (Step-by-Step)
- Step 1: Access The Blade
- Step 2: Remove the Old Blade
- Step 3: Insert the New Blade
- Step 4: Turn on the Jigsaw
- Conclusion
- FAQ
*Safety is your responsibility. Make sure you know what you’re doing and take all necessary safety precautions while working with power tools. Safety comes first!
Most Common Reasons to Change a Jigsaw Blade
There are three main reasons why you’ll need to replace your jigsaw blade:
- It’s bent or broken: Blades can snap or twist while cutting difficult materials or after an accidental drop. A damaged blade won’t cut straight and can even be dangerous.
- It’s worn out: Like any cutting tool, jigsaw blades dull with use. A dull blade tears wood instead of slicing cleanly—and can cause the saw to jump or stall.
- You’re cutting different material: Switching from wood to metal or plastic? You’ll need the right blade for the job. Each material cuts best with a specific type of blade.
🔧 Bonus Tips:
- Want a cleaner cut? You might switch to a finer-tooth blade when working on visible cuts or delicate materials.
- Blade too short or long? Use the correct blade length for your material—too short won’t cut through, too long can hit the base.
Jigsaw Blade Types
There are two main types of jigsaw blades: T-shank and U-shank. Knowing which one your tool uses is essential for compatibility and ease of use.
- T-shank blades:
These are the most common and are designed to fit most modern jigsaws. Their T-shaped end locks securely into the tool’s blade clamp without needing tools. T-shank blades are easy to change, reliable, and work with most brands (Bosch, DeWalt, Makita, etc.). - U-shank blades:
Older jigsaws sometimes use U-shank blades, which require a tool (like a hex key) to secure in place. These are less common today and usually found on legacy or budget jigsaws.
🔧 Tip: Always check your jigsaw’s manual before buying blades. Most newer jigsaws support only T-shank blades.
| Blade Type | Tool Compatibility | Tool-Free Change |
|---|---|---|
| T-shank | Most modern jigsaws (Bosch, DeWalt, Makita) | ✅ Yes |
| U-shank | Older jigsaws | ❌ No |
Jigsaw Blade Clamp Mechanism
Jigsaws use different mechanisms to hold the blade in place. Understanding which one your tool has will make blade changes easier and prevent damage or unsafe use.
Here are the most common clamp types:
- Quick Release
A spring-loaded lever or button ejects and locks the blade without tools. This is the most convenient option and is standard on most modern jigsaws. - Keyless Clamp
Similar to quick release, but usually involves twisting a knob or locking a sleeve around the blade. No extra tools needed, just manual pressure. - Screw Clamp System
Found on older or budget jigsaws. You’ll need a hex key or screwdriver to loosen or tighten the screw that holds the blade in place. Slower but still reliable.
🔧 Bonus Tip:
Some jigsaws may look like they’re tool-free, but still require a hex key hidden inside the handle or stored on the tool. If the blade won’t come out easily, check your manual — don’t force it.
How to Change a Jigsaw Blade (Step-by-Step)
Before you begin replacing the old blade with a new jigsaw blade, there are a few important things to keep in mind:
- Unplug or remove the battery
Always disconnect the jigsaw from power to prevent accidental starts. - Know your blade type and clamp system
Check if your jigsaw uses T-shank or U-shank blades, and what mechanism secures the blade (quick release, keyless, or screw system). - Let the blade cool
If the jigsaw was just used, wait for the blade to cool down before handling it.
Step 1: Access The Blade
Flip the jigsaw upside down and remove any protective covers, bars, or hoods that block access to the blade area. These are often held in place by small screws or clips.
⚡ Tip: If your jigsaw has a quick-release mechanism, you’re in luck—it makes this process much faster.
Step 2: Remove the Old Blade
The method depends on your jigsaw:
- Tool-required removal: Use a hex key (Allen wrench) or screwdriver to loosen the clamp and slide out the blade.
- Tool-free release: Turn the locking lever or press the release button to free the blade.
⚠️ Safety Note: On some models with a spring-loaded lever, the blade may eject quickly. Hold the blade gently as you release it.
Step 3: Insert the New Blade
Once you have the appropriate blade for your jigsaw, follow these steps to insert it correctly:
- Check blade direction: The teeth should point forward, away from the jigsaw body.
- Slide it in fully: Insert the blade as far as it will go. Push firmly until it clicks or locks into place.
- Secure the blade: Tighten the screw or release the lever to lock it in.
Now gently tug the blade to confirm it’s locked and won’t wobble.
Step 4: Turn on the Jigsaw
Before powering on the jigsaw, make sure all the protective pieces are securely back in place. Attach them to their original positions and ensure everything is correctly aligned.
Test the jigsaw by running it briefly—watch for blade movement or wobble.
✅ If everything looks good, you’re ready to cut!
Conclusion
Changing a jigsaw blade might seem like a small thing, but it’s one of those basics that really makes a difference when you’re working on a project. Whether your blade is dull, bent, or just not right for the material you’re cutting, knowing how to switch it out properly helps you stay safe and get cleaner, more accurate results.
If you’re just starting out, don’t worry—every jigsaw is slightly different, but once you know the type of blade it uses and how the clamp works, the rest is easy. Take your time, double-check that the blade is facing the right way, and make sure it’s secure before you start cutting.
Also, remember to unplug the tool (or remove the battery) before doing anything. It might sound obvious, but it’s something even experienced woodworkers forget from time to time.
I use a Bosch GST 150 BCE in my shop, but whether you’re using a Bosch, DeWalt, Makita, or another brand, the steps will be nearly the same. If you’re working on multiple types of projects, try keeping a few spare blades around—different blades really do make a difference depending on the material and the type of cut.
Want to take your jigsaw game further? You can also check out the Simple Jigsaw Cutting Station I built — it’s a great way to get more control over your cuts, and makes blade changes easier too.
If this guide helped, let me know—or better yet, try changing a blade and see how it feels.
🔗 Keep Reading
- 5 DIY Jigsaw Guides for Your Workshop – Build smarter with jigs that improve accuracy and control.
- How to Cut Straight With a Jigsaw (Tips & Tricks) – Struggling with skewed cuts? Here’s how to fix that.
FAQ
1. How often should I change my jigsaw blade?
It depends on how often you use it and what materials you’re cutting. In general, replace the blade when it becomes dull, bent, or starts burning the material. You’ll notice rough cuts or increased resistance when it’s time.
2. How do I know if my jigsaw blade is installed correctly?
The blade should be secure with no wobble, and the teeth should face forward (away from the jigsaw). Always double-check that it’s fully seated in the clamp and locked in place before turning on the saw.
3. Can I use any jigsaw blade with my jigsaw?
No, you need to match the blade type (T-shank or U-shank) with your jigsaw’s clamp system. Most modern jigsaws use T-shank blades, but older models may require U-shank.
4. Why does my jigsaw blade keep falling out?
This can happen if the blade isn’t fully seated, the clamp is dirty or damaged, or you’re using the wrong type of blade for your tool. Check the mechanism and make sure you’re using compatible blades.
