See part 61 in the diagram
( Grid squares measure 1x1 inch )
Dust Duct Assembly N142121
Manufactured by:
DeWALT
ERP Number: ERP11929523
Part Number: N142121
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DWS779 !
Delivers in 3-5 Business Days!
DWS779 !
Product Description
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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.
Frequently Purchased Together
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Troubleshooting
This part works with the following brands:
This part works with the following products:
Videos For installing this part.
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Customer Part Reviews
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Sorry, we couldn't find any existing reviews that matched. Try using some different or simpler keywords.
Replacement dust duct
The duct was easy to install as a replacement for the damaged original.
James - December 7, 2019
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
Easy replacement
Right part and right price
Guest - January 26, 2021
Verified Purchase
Easy Repair.. Great Part
The part arrived quickly and my saw works much better now.
Guest - November 9, 2021
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
DeWalt
Easy to find on the site and quick delivery
Guest - June 1, 2022
Verified Purchase
The entire process was flawless.
The part I ordered was easy to locate on the site. Ordering was quick as well the shipping.
Dennis - July 27, 2025
Verified Purchase
Questions & Answers
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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.
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Most Recent
Sorry, we couldn't find any existing installation instruction that matched.
I had cut fare amount of metal and the sparks had pitted and melted the Dust Duct assembly and Kerf plate.
Clifford from Honolulu, Hawaii
2 of 2 people
found this instruction helpful.
Easy
Less than 15 mins
Screw drivers
Very simple install. The dust duct assembly took a bit of finagling to take out and reinstall trying to find the right angles.
dust duct was broke, kerf plate had been cut into several times.
Douglas from Orleans, Indiana
0 of 1 people
found this instruction helpful.
Easy
Less than 15 mins
Screw drivers
removed old parts and replaced with the new. easy fix
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 from Midlothian, Texas
0 of 1 people
found this instruction helpful.
Easy
15 - 30 mins
Screw drivers
Used logic to remove appropriate parts to enable installation of replacement parts.
broken plastic from flying wood
rolf from NEW HOLLAND, Pennsylvania
0 of 1 people
found this instruction helpful.
Easy
15 - 30 mins
Nutdriver, Screw drivers
Removed 3 screws pulled out then reverse. Simple.
Saw fell over and broke the dust collector tube.
Andrew from Temecula, California
0 of 1 people
found this instruction helpful.
Easy
Less than 15 mins
Screw drivers
Temporarily removed yellow plastic compound gauge from back of saw. Installed tune from front side of saw. Replaced plastic gauge.
Duct cracked
Frederick from WILLIAMSBURG, Virginia
0 of 1 people
found this instruction helpful.
Easy
Less than 15 mins
Screw drivers
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
BROKEN DUST SHIELD
Thomas from Centereach, New York
0 of 1 people
found this instruction helpful.
Easy
Less than 15 mins
Screw drivers
1) REMOVED BLADE
The plastic dust duct broke
Edward from Mandeville, Louisiana
0 of 1 people
found this instruction helpful.
Easy
Less than 15 mins
Screw drivers
removed the old and installed the new one.
Saw was to close to the edge of a folding table and flipped over.
Donna from Williamsburg, Kentucky
0 of 1 people
found this instruction helpful.
Easy
Less than 15 mins
Screw drivers
It was super easy all we did was use a screw driver to remove the broken pieces and put the new ones back on.
Model Cross Reference
This part works with the following models:
ERP Number: ERP11929523 N142121
Brand
Model Number
Description
DeWALT
DHS790
Miter Saw
- 120vmax Corded/Cordless Miter Saw
DeWALT
DHS790AB
Miter Saw
- 120v Cord/Crdlss Mit
DeWALT
DHS790ABR
Miter Saw
- Mitre Saw
DeWALT
DHS790AT2
Miter Saw
- Brshls 120v 12-In Mi
DeWALT
DHS790T2
Miter Saw
- 120v 12in Brshls Sl
DeWALT
DWS779
Saw
- 12in Doubl Bevel Saw
DeWALT
DWS780
Miter Saw
- 12in Compound Miter Saw
DeWALT
DWS780-AR
Miter Saw
- 12in Compound Miter Saw
DeWALT
DWS780-B2
Miter Saw
- 12in Compound Miter Saw
DeWALT
DWS780R
Miter Saw
- Mitre Saw
DeWALT
DWS782
Miter Saw
- 12" Double Bevel Sliding Compound Miter Saw
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
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_WW_1.gif "Part Location Diagram of N142121 DeWALT Dust Duct Assembly")
