1. Introduction
This manual provides essential information for the safe and effective use of your Bosch 18DC-5E 4-1/2 to 5-Inch Dust Collect Cut Off Guard. This accessory is designed to enhance dust collection during cutting operations with compatible Bosch small angle grinders, contributing to a cleaner work environment and improved user safety. Please read all instructions carefully before assembly and operation.

Image 1.1: The Bosch 18DC-5E Dust Collect Cut Off Guard. This image shows the black guard with the Bosch logo, featuring a dust port and a clear adjustable footplate.
2. Safety Information
Always observe general power tool safety guidelines when using this accessory. Wear appropriate personal protective equipment (PPE) including eye protection, hearing protection, and a dust mask. Ensure the work area is well-ventilated. Disconnect the power tool from the power source before making any adjustments or changing accessories.
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
3. Package Contents
- Bosch 18DC-5E Dust Collect Cut Off Guard Unit
- Instruction Guide (this document)
4. Setup
4.1 Compatibility
The 18DC-5E Dust Collect Cut Off Guard is compatible with Bosch 4-1/2 inch and 5 inch small angle grinders, including models GWS10-45/P/PD, GWS13-50/VS/VSP/P/PD, AG series, 1800 series grinders, and 18V cordless grinders such as GWS18 V-45C/PC/PSC. Verify your grinder model for compatibility before attachment.
4.2 Attaching the Guard to Your Grinder
- Ensure your angle grinder is unplugged or its battery is removed.
- Remove the existing guard from your angle grinder according to your grinder's instruction manual.
- Position the 18DC-5E Dust Collect Cut Off Guard onto the grinder's spindle collar. The flexible guard design allows for proper alignment.
- Secure the guard firmly using the grinder's clamping mechanism. Ensure it is tightly fastened and does not wobble.
- Install the appropriate cutting wheel for your application.

Image 4.1: A person demonstrating the attachment of the Bosch 18DC-5E Dust Collect Cut Off Guard to a Bosch angle grinder. The guard is being positioned onto the grinder head.
4.3 Connecting to a Dust Extraction System
Connect the dust port on the guard to a suitable dust extractor or shop vacuum using a compatible hose. The dust port is designed to integrate with Bosch PRO+GUARD dust extraction systems for optimal performance.
5. Operating Instructions
5.1 Adjusting Cutting Depth
The guard features a single-screw depth adjustment mechanism. Loosen the screw, set the desired cutting depth by sliding the foot plate, and then tighten the screw securely to maintain the depth during operation. This ensures clean and accurate cuts.

Image 5.1: A side view of the Bosch 18DC-5E Dust Collect Cut Off Guard, highlighting the single-screw mechanism for adjusting the cutting depth.
5.2 Performing Cuts
With the guard securely attached and the dust extractor connected, position the large, durable foot plate flat on the workpiece. Start the grinder and slowly guide it along the cutting line. The foot plate provides stability, and the dust collection system will actively remove debris from the cutting area.
6. Maintenance
Regularly inspect the guard for any damage or wear. Clean the guard, especially the dust port and the area around the cutting wheel, after each use to prevent buildup that could impede performance or dust collection efficiency. Use a dry cloth or compressed air for cleaning. Do not use solvents that could damage plastic components.
7. Troubleshooting
- Issue: Excessive dust escaping during operation.
Possible Cause: Improper connection to dust extractor, clogged dust hose/filter, or incorrect guard installation.
Solution: Ensure the dust hose is securely attached to the guard and the extractor. Check the dust extractor's filter and bag/canister for fullness and clean or replace as needed. Verify the guard is properly seated and clamped onto the grinder. - Issue: Guard does not fit the angle grinder.
Possible Cause: Incompatibility with the specific grinder model.
Solution: Refer to Section 4.1 (Compatibility) to confirm your grinder model is listed. This guard is designed for specific Bosch 4-1/2 inch and 5 inch small angle grinders. If your model is not listed, it may not be compatible. - Issue: Difficulty adjusting cutting depth.
Possible Cause: Adjustment screw is too tight or debris is obstructing the sliding mechanism.
Solution: Loosen the single-screw depth adjustment sufficiently. Clean any debris from the sliding tracks of the foot plate. Apply a small amount of dry lubricant if necessary.
8. Specifications
| Brand | Bosch |
| Model Number | 18DC-5E |
| Material | Metal, Plastic |
| Style | Angled |
| Item Weight | 1.75 pounds |
| Compatible Grinder Sizes | 4-1/2 Inch and 5 Inch Small Angle Grinders |
| Special Features | Compact, Heavy-Duty, Single-Screw Depth Adjustment |
9. Warranty Information
This product is covered by a warranty for product defects only. For specific terms and conditions, please refer to the warranty card included with your purchase or contact Bosch customer support.
10. Customer Support
For further assistance, technical support, or inquiries regarding your Bosch 18DC-5E Dust Collect Cut Off Guard, please visit the official Bosch website or contact Bosch customer service directly. Contact information can typically be found on the Bosch website or on the product packaging.