Easy
Less than 15 minutes
This replacement dust duct assembly is designed for use with Dewalt compound miter saws. It is an authentic OEM sourced item, not an aftermarket equivalent. This part helps to direct the dust away from the work area. Please note, this part is made from durable plastic and it is sold individually.
Dust Duct Assembly N142121
OEM part for: DeWALT
Part Number: N142121
$29.68
In Stock
Order within the next 7 hours and your part ships today! 
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Frequently Purchased Together ?
Compatibility
This part will fit the following 20 machines
DeWALT
DWS780 Type 1 12in Compound Miter Saw View Diagrams & Manuals
DWS782 (Type 20) 12" Double Bevel Sliding Compound Miter Saw View Diagrams & Manuals
DHS790AB (Type 20) 120v Cord/Crdlss Mit View Diagrams & Manuals
DHS790AT2 (Type 20) Brshls 120v 12-in Mi View Diagrams & Manuals
DHS790T2 (Type 20) 120v 12in Brshls Sl View Diagrams & Manuals
DWS779 (Type 20) 12in Doubl Bevel Saw View Diagrams & Manuals
DHS790 (Type 20) 120vmax Corded/Cordless Miter Saw Power Tool View Diagrams & Manuals
DHS790AB (Type 22) 120vmax Corded/Cordless S Power Tool View Diagrams & Manuals
DHS790AT2 (Type 21) 120vmax Corded/Cordless S Power Tool View Diagrams & Manuals
DHS790AT2 (Type 22) 120vmax Corded/Cordless S Power Tool View Diagrams & Manuals
DHS790T2 (Type 22) 120vmax Corded/Cordless S Power Tool View Diagrams & Manuals
DWS779 (Type 21) 12in Doubl Bevel Saw Power Tool View Diagrams & Manuals
DWS779 (Type 22) 12in Doubl Bevel Saw Power Tool View Diagrams & Manuals
DWS780-AR (Type 1) Mitre Saw Power Tool View Diagrams & Manuals
DWS780-AR (Type 20) Mitre Saw Power Tool View Diagrams & Manuals
DWS780-B2 (Type 1) Mitre Saw Power Tool View Diagrams & Manuals
DWS780-B2 (Type 20) Mitre Saw Power Tool View Diagrams & Manuals
DWS780 (Type 2) Mitre Saw Power Tool View Diagrams & Manuals
DWS780 (Type 20) Mitre Saw Power Tool View Diagrams & Manuals
DWS780 (Type 21) Mitre Saw Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Miter Saw Parts
- Saw Parts
This part replaces obsolete part #: N041726
Repair Videos ?
Watch the Repair Video for
Dust Duct Assembly
Customer Part Reviews ?
Average Rating (out of 5):
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DeWalt
Easy to find on the site and quick delivery
Guest -
June 1, 2022
Verified Purchase
Easy repair great price and fast shipping
Parts came on time easy repair with your video saw works like brand new
Guest -
January 25, 2022
Verified Purchase
Easy Repair.. Great Part
The part arrived quickly and my saw works much better now.
Guest -
November 9, 2021
Verified Purchase
Easy replacement
Right part and right price
Guest -
January 26, 2021
Verified Purchase
Part was perfect, video was great. Replace part in 5 min. Saw running new again
Part was perfect, video was very helpful. Replaced part in 5 min saw working like new
Guest -
March 21, 2020
Verified Purchase
Replacement dust duct
The duct was easy to install as a replacement for the damaged original.
James -
December 7, 2019
Verified Purchase
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t days ago
Verified Purchase
eReplacementParts Team
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Questions & Answers ?
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Does this fit my product?Questions & Answers for Dust Duct Assembly
Just want to confirm this part works with my saw DWS780 Type 1 and what dust bag I would need to fit this?
Mike
for model number Dws780 Type 1
asked on 2022-03-10
Hello Mike, thank you for your question. The correct parts are Dust Duct Assembly N142121 and Dust bag 147734-06. If you need help placing an order, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you.
eReplacementParts Team March 10, 2022
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Saw fell over and broke the dust collector tube.
Andrew - April 17, 2024
Tool Type
Miter Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Torx Bits
Parts Used
Temporarily removed yellow plastic compound gauge from back of saw. Installed tune from front side of saw. Replaced plastic gauge.
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dust duct was broke, kerf plate had been cut into several times.
Douglas - July 18, 2022
Tool Type
Miter Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
removed old parts and replaced with the new. easy fix
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BROKEN DUST SHIELD
Thomas - September 15, 2021
Tool Type
Miter Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
1) REMOVED BLADE
2) REMOVED PEICES OF BROKEN SHIELD
3) REPLACED DUST SHIELD
4) REINSTALLED BLADE
2) REMOVED PEICES OF BROKEN SHIELD
3) REPLACED DUST SHIELD
4) REINSTALLED BLADE
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broken plastic from flying wood
rolf - September 14, 2021
Tool Type
Miter Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Nutdriver
Parts Used
Removed 3 screws pulled out then reverse. Simple.
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Aquired a well-used miter saw at a garage sale that had a broken locking pin and broken dust duct assembly that needed replacing.
Kevin - February 25, 2021
Tool Type
Miter Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Used logic to remove appropriate parts to enable installation of replacement parts.
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The plastic dust duct broke
Edward - November 9, 2019
Tool Type
Miter Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
removed the old and installed the new one.
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Duct cracked
Frederick - February 2, 2019
Tool Type
Miter Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Remove screws (4) with screwdriver , spliting shute. Remove pieces , install new one. Replacement did not match up correctly and required an 1.5" pvc coupler to attach shute to collection bag
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Saw was to close to the edge of a folding table and flipped over.
Donna - July 12, 2018
Tool Type
Miter Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
It was super easy all we did was use a screw driver to remove the broken pieces and put the new ones back on.
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I had cut fare amount of metal and the sparks had pitted and melted the Dust Duct assembly and Kerf plate.
Clifford - June 3, 2017
Tool Type
Miter Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Very simple install. The dust duct assembly took a bit of finagling to take out and reinstall trying to find the right angles.
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OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
