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dewalt

NA121629 Carbon Brush (Pair) - Dewalt

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$6.27
In Stock
SKU
NA121629
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Know Before You Order

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We stock tens of thousands of parts in our warehouse, and most in-stock orders ship within 24 business hours. Because we specialize in hard-to-find tool parts, some items are sourced directly from the manufacturer after your order is placed and may require 10–14 business days before shipment. We believe in being transparent about timelines so you know what to expect before ordering. If timing is critical, please contact with your part number for an estimated delivery timeframe.

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As a family-owned business, we’ve built long-standing relationships with trusted manufacturers across the industry. These partnerships allow us to source specialty parts that are often unavailable through larger retailers or online marketplaces. In many cases, M&M Tool Parts provides one of the few reliable ways to obtain these components — and we work hard to get them to you as quickly as possible.

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Our team begins processing orders immediately. If your item is stocked locally, you’ll typically receive tracking information within 24 business hours. For manufacturer-sourced items, we coordinate directly with vendors to secure and ship your order as efficiently as possible. We understand downtime is frustrating, and we sincerely appreciate your patience while we help source parts that can often be difficult to find elsewhere.

This NA121629 Carbon Brush (Pair) is an Authentic DeWalt Replacement Part

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Compatibility
  1. Tool Parts
  2. DeWALT Parts
  3. DeWALT Trim Saw Parts
  4. DWE4314-B3 (Type 1) Dewalt Grinder Parts
  5. DWE4314N-BR (Type 1) Dewalt Grinder Parts
  6. DeWALT Angle Grinder Parts

The DeWALT NA121629 Carbon Brush Set is a genuine OEM replacement brush pair designed for select DeWALT corded angle grinders. Carbon brushes maintain electrical contact between the stationary motor components and the rotating armature, making them an essential wear component for reliable motor operation.

Product Details

  • Part Number: NA121629
  • Manufacturer: DeWALT
  • Part Type: Carbon Brush Set / Brush Pair
  • Quantity: 2 Carbon Brushes
  • Replaces: N257540 and NA041980
  • OEM Status: Genuine DeWALT replacement part

Auto-Stop Brush Design

The NA121629 brushes incorporate an auto-stop feature designed to help protect the motor armature. As the carbon material reaches its wear limit, the integrated mechanism interrupts electrical contact, helping prevent the brush from wearing far enough to damage the motor's commutator.

Tool Compatibility

The NA121629 brush pair is used across a variety of DeWALT DWE-series corded angle grinders. Common compatible models include:

  • DWE402 Series: DWE402, DWE402G, DWE402K, DWE402N, DWE402WR
  • DWE421 Series: DWE4212-B3, DWE4214-B3
  • DWE422 Series: DWE4222, DWE4224
  • DWE430 Series: DWE43066N
  • DWE431 Series: DWE43113, DWE43114, DWE43114N, DWE43115, DWE43115N, DWE43116, DWE43116N, DWE43131, DWE4314-B3, DWE43144, DWE43144N, DWE4315-B3
  • DWE461 Series: DWE46103, DWE46103-CA, DWE46144N, DWE46166N

Common Signs of Worn Carbon Brushes

Carbon brushes gradually wear during normal tool operation. Replacement may be necessary if your grinder begins experiencing:

  • Intermittent motor operation
  • Unexpected power loss or shutdown
  • Difficulty starting
  • Excessive sparking around the motor
  • Reduced or inconsistent motor performance

Replacement & Maintenance

Carbon brushes should generally be replaced as a pair to maintain even electrical contact with the motor. When replacing the brushes, inspect the armature commutator for excessive scoring, pitting, discoloration, or other signs of wear that could indicate additional motor service is required.

Compatibility Note: DeWALT tools may have multiple type numbers and production revisions under the same model name. Verify your tool's complete model and type number before ordering to ensure proper fitment.

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