DeWalt N278801 Knob Assembly – Genuine OEM Replacement Oscillating Multi-Tool Depth Guide Knob
Part Number: N278801
Category: Power Tool Parts & Accessories → Oscillating Multi-Tool Parts → Depth Guide Knobs
Type: DeWalt N278801 Knob Assembly – Genuine OEM Replacement Oscillating Multi-Tool Depth Guide Knob
The DeWalt N278801 Knob Assembly is a genuine OEM replacement adjustment component designed for compatible DeWalt oscillating multi-tools and depth-guide assemblies. This knob helps secure and adjust the depth guide, allowing the operator to establish controlled cutting or material-removal depth for applicable tasks. Manufactured to original equipment specifications, it provides a direct replacement for a cracked, stripped, worn, damaged, loose, or missing depth-guide knob.
Key Features & Benefits
- Part Number: N278801
- Genuine OEM DeWalt replacement part
- Replacement knob assembly for compatible oscillating multi-tools
- Designed for the designated depth-guide assembly
- Helps secure the depth guide in the selected position
- Supports controlled cutting and material-removal depth
- Provides convenient hand-operated adjustment
- Ideal for replacing a cracked, stripped, worn, or missing knob
- Direct-fit OEM replacement
- Manufactured to original equipment specifications
Technical Specifications
- Part Number: N278801
- Manufacturer: DeWalt
- Product Type: Oscillating Multi-Tool Depth Guide Knob Assembly
- Application: Depth-guide adjustment, positioning, and retention
- OEM Part: Yes
- Quantity: Sold Individually
Compatible Applications
The DeWalt N278801 Knob Assembly is designed for compatible DeWalt oscillating multi-tools and depth-guide attachments that use this specific adjustment knob.
Always verify your multi-tool model, type number, depth-guide configuration, parts diagram, and original part number before ordering to ensure proper compatibility.
Function of the Depth Guide Knob
The N278801 Knob Assembly is an adjustment component used to:
- Secure the depth guide to the designated assembly
- Adjust the guide to the required cutting depth
- Hold the selected guide position during operation
- Support controlled plunge cuts
- Help limit excessive cutting depth
- Improve consistency during repetitive applications
- Restore proper depth-guide functionality
A properly functioning knob assembly allows the depth guide to be adjusted and secured without using improvised hardware.
Common Signs Replacement Is Needed
Replace or inspect the knob assembly if you notice:
- Knob is cracked, broken, or missing
- Threads are stripped or damaged
- Knob spins without tightening
- Depth guide does not remain securely positioned
- Knob is difficult to loosen or adjust
- Internal insert is loose or damaged
- Guide shifts during tool operation
- Improvised hardware is being used in place of the knob
A worn or damaged knob can prevent the depth guide from remaining secure, reducing cutting accuracy and control.
Installation & Service Notes
Disconnect the oscillating multi-tool from its power source before installing or removing the knob assembly. Remove the battery from cordless models or unplug the power cord from electric models. Allow the accessory and all moving components to stop completely.
Remove the damaged knob and inspect the mating threads, mounting point, and depth-guide components for wear or damage. Position the depth guide as required, install the DeWalt N278801 Knob Assembly in the correct location, and tighten it by hand until the guide is secure. Confirm that the guide does not shift before operating the tool.
Important: Do not overtighten the knob or use pliers that could damage its grip surface or threads. Always verify the multi-tool model, type number, depth-guide configuration, and original part number before ordering. Follow the tool manufacturer’s instructions when adjusting cutting depth.
Maintenance Recommendations
- Disconnect the power source before adjusting the depth guide
- Keep the knob threads clean and free of dust or debris
- Inspect the knob and mating threads for wear
- Tighten the knob by hand without using excessive force
- Confirm that the depth guide is secure before operation
- Replace the knob if it cracks, strips, or no longer tightens properly
- Store the depth guide and knob together when removed from the tool
- Use genuine OEM replacement parts to maintain proper fit and dependable adjustment
