Introduction
This manual provides essential information for the safe operation, maintenance, and troubleshooting of your CAT DX51B 18V 1 FOR ALL Cordless Jig Saw. Please read and understand all instructions before using the tool. Keep this manual for future reference.

Figure 1: A detailed view of the CAT DX51B cordless jig saw, showcasing its ergonomic design and black and yellow color scheme. A battery is shown ghosted, indicating it is sold separately.
General Safety Instructions
Always follow basic safety precautions to reduce the risk of fire, electric shock, and personal injury. Keep your work area clean and well-lit. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Always wear appropriate personal protective equipment, including eye protection, hearing protection, and gloves.
- Work Area Safety: Keep children and bystanders away while operating a power tool.
- Electrical Safety: Avoid body contact with earthed or grounded surfaces. Do not expose power tools to rain or wet conditions.
- Personal Safety: Stay alert, watch what you are doing, and use common sense. Do not use the tool while tired or under the influence of drugs, alcohol, or medication.
- Power Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools.
- Battery Tool Use and Care: Recharge only with the charger specified by the manufacturer. Use power tools only with specifically designated battery packs.
Product Overview
Key Features

Figure 2: An annotated diagram of the CAT DX51B jig saw pointing out its brushless motor, 4-position orbital action, 1-inch blade stroke, and tool-free adjustment capabilities.
- High-Efficiency Brushless Motor: Provides increased power, extended run time, and longer tool life.
- 4-Position Orbital Action: Allows for precise cutting and control over the cut aggressiveness.
- Variable Speed Trigger: Offers speed control from 0-3,500 Strokes Per Minute (SPM) for various materials.
- Tool-Free Bevel Base Adjustment: Enables quick angle changes from 0-45° left or right.
- Tool-Free Blade Clamp: Compatible with both U-Shank and T-Shank blades for versatile use.
- Textured Overmold Grip: Designed for enhanced comfort and control during prolonged use.
- 1 FOR ALL Battery System: Compatible with all CAT 18V cordless products (battery and charger sold separately).
What's Included

Figure 3: An image displaying all components included with the CAT DX51B jig saw: the jig saw unit, a wood cutting blade, a dust port adapter, a base cover, and a parallel guide.
The CAT DX51B Cordless Jig Saw package includes:
- 18V Jig Saw (DX51B)
- Wood Blade
- Dust Port Adapter
- Parallel Guide
- Base Cover
Setup
1. Battery Installation
The DX51B jig saw is part of the CAT 1 FOR ALL 18V battery platform. Battery and charger are sold separately.
- Ensure the jig saw is switched off.
- Align the battery pack with the battery port on the tool.
- Slide the battery pack into the port until it clicks securely into place.
- To remove, press the battery release button and slide the battery pack out.

Figure 4: A diagram illustrating the CAT 1 FOR ALL battery system, highlighting how a single 18V battery can power a wide range of compatible CAT cordless tools.
2. Blade Installation
The tool-free blade clamp accepts both U-Shank and T-Shank blades.
- Ensure the battery pack is removed from the tool.
- Lift the blade clamp lever located at the front of the tool.
- Insert the blade shank fully into the blade holder with the teeth facing forward.
- Release the blade clamp lever to secure the blade. Gently pull on the blade to ensure it is firmly seated.
3. Base Adjustment (Bevel)
The base can be adjusted for bevel cuts up to 45 degrees in either direction without tools.

Figure 5: A detailed view of the red lever mechanism on the CAT DX51B jig saw, illustrating the tool-free bevel adjustment feature for quick angle changes.
- Ensure the battery pack is removed.
- Locate the red bevel adjustment lever beneath the tool.
- Pull the lever to release the base.
- Tilt the base to the desired angle (0-45°). Use the angle markings for reference.
- Push the lever back to lock the base securely in place.
4. Accessory Attachment
Attach the dust port adapter and parallel guide as needed for your application.
- Dust Port Adapter: Slide the dust port adapter onto the designated exhaust port at the rear of the tool. Connect a vacuum cleaner hose for dust extraction.
- Parallel Guide: Insert the parallel guide rod into the slots on the base of the jig saw. Adjust the guide to the desired cutting width and tighten the locking screw.
Operation
1. Powering On/Off
The jig saw is activated by a variable speed trigger.
- To start the tool, depress the trigger switch. The blade speed will increase as you press the trigger further.
- To stop the tool, release the trigger switch.
- For continuous operation, press the lock-on button while the trigger is depressed. To release, depress the trigger again.
2. Variable Speed Control
The variable speed trigger allows you to match the cutting speed to the material and blade type.
- Slower speeds are suitable for harder materials, intricate cuts, or starting a cut.
- Faster speeds are ideal for softer materials and straight cuts.
3. Orbital Action Settings
The 4-position orbital action lever controls the aggressiveness of the blade's stroke.

Figure 6: A user operates the CAT DX51B jig saw, demonstrating its orbital action feature for efficient and precise cutting through a wooden board.
- Position 0 (No Orbital Action): For fine, precise cuts in wood, metal, and plastics.
- Positions 1-3 (Increasing Orbital Action): For faster, more aggressive cuts in wood and softer materials. Higher settings remove material more quickly but may result in a rougher cut.
4. Cutting Techniques
Always secure your workpiece with clamps before cutting. Ensure the blade is clear of the workpiece before starting the tool.

Figure 7: A user wearing safety glasses and gloves operates the CAT DX51B jig saw to make a precise cut on a wooden workpiece, demonstrating the tool's application.
- Straight Cuts: Use the parallel guide for accurate straight cuts. Apply steady, even pressure.
- Curve Cuts: Use a narrower blade and a lower orbital setting. Guide the tool smoothly along the desired curve.
- Plunge Cuts: For internal cuts without a pilot hole, tilt the tool forward so the front of the base rests on the workpiece. Start the tool at full speed, then slowly lower the blade into the material.
Maintenance
Regular maintenance ensures optimal performance and extends the life of your tool.
- Cleaning: After each use, clean the tool with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners. Clear dust and debris from ventilation openings.
- Blade Care: Inspect blades regularly for sharpness and damage. Replace dull or damaged blades promptly.
- Storage: Store the tool in a dry, secure location out of reach of children. Remove the battery pack before storing for extended periods.
- Brushless Motor: The brushless motor requires no carbon brush replacement, reducing maintenance needs.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | Battery not charged or improperly installed | Ensure battery is fully charged and correctly inserted. |
| Poor cutting performance | Dull or incorrect blade; incorrect speed/orbital setting | Replace blade. Select appropriate speed and orbital setting for the material. |
| Excessive vibration | Loose blade or damaged blade | Check blade for secure installation and damage. Replace if necessary. |
| Tool overheats | Overloading; blocked ventilation slots | Reduce load. Clear ventilation slots. Allow tool to cool. |
Specifications
| Feature | Specification |
|---|---|
| Model Number | DX51B |
| Voltage | 18 Volts |
| Power Source | Battery Powered |
| Motor Type | Brushless |
| No-Load Speed | 0-3,500 SPM (Strokes Per Minute) |
| Orbital Action | 4-Position |
| Bevel Capacity | 0-45 Degrees (Left/Right) |
| Blade Type Compatibility | U-Shank and T-Shank |
| Surface Recommendation | Wood |
| Item Weight | 5.18 pounds |
| Product Dimensions | 11.8 x 3.1 x 8 inches |
| Included Components | Jig Saw (DX51B), wood blade, dust port adapter, parallel guide, base cover |
Warranty Information
This CAT DX51B Cordless Jig Saw comes with a Limited Warranty. For specific terms, conditions, and registration details, please refer to the warranty card included with your product or visit the official CAT Tools website. Keep your proof of purchase for warranty claims.
Customer Support
If you have any questions, require technical assistance, or need to order replacement parts, please contact CAT Customer Support. Refer to the contact information provided on the product packaging or the official CAT Tools website for the most up-to-date support channels.

Figure 8: A user's hand grips the CAT DX51B jig saw, emphasizing the tool's compact design and the presence of a high-efficiency brushless motor, with a battery attached.

Figure 9: A close-up image showcasing the textured overmold grip on the handle of the CAT DX51B jig saw, designed for enhanced comfort and control during operation.





