Easy
15-30 minutes
This is a genuine OEM part. The DeWALT sleeve is constructed of metal, and is compatible with several impact drivers. This component is fitted in the nose cone, between the spring and washer. The sleeve secures the anvil assembly and the spring. This part is sold individually. A hex key and a screwdriver may be helpful in the repair.
Sleeve N078437
OEM part for: DeWALT, Porter Cable
Part Number: N078437
$5.43
In Stock
Ships within 1 business day 
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Compatibility
This Sleeve will fit the following 76 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 76 matching models.
76 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- DeWALT
- Porter Cable
This item works with the following types of products:
- Impact Driver
- Impact Wrench
This part replaces obsolete part #: 642879-00 (Before Date Code 201236)
Customer Part Reviews ?
Average Rating (out of 5):
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Impact driver parts
Parts arrived very quickly and were exactly what I ordered
Perry -
July 25, 2022
Verified Purchase
Found the correct parts
Had to replace many small parts on a DeWalt impact drill. Quickly found all the correct parts on the site thanks to the excellent parts drawings. Parts arrived quickly and he order was correct and complete. My DeWalt tool is back in service.
Guest -
November 23, 2020
Verified Purchase
Easy repair Great part
The was in great part ,arrived quickly and fit work
Guest -
February 17, 2020
Verified Purchase
Excellent
It was fast shipping and excellent quality
Guest -
November 18, 2019
Verified Purchase
Easy & fast
The items arrived fairly quickly and in good condition. The packaging is very adequate. Thank you very much!
iGlobal -
October 4, 2019
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.
Bit kept falling out
Brian - April 26, 2017
👍 4 of 4 people found this instruction helpful
Tool Type
Impact Driver
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver
Removed the sleeve and installed the new spring to keep tension on the steel ball.
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Bits would not stay in the drill
Anna - October 6, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Impact Driver
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pick
Removed the parts per instructions given by other people on your website and put it back together and all is well! Bought extra parts to have on hand in case my other one has the same issue!
Thanks for having the parts available!
Thanks for having the parts available!
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Tool holder missing
robert - May 7, 2018
Tool Type
Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
I watched your YouTube video and it made it easy.
https://www.youtube.com/watch?v=PQ8lSB_mP1c
https://www.youtube.com/watch?v=PQ8lSB_mP1c
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Chuck wouldn't retain bits
John - April 20, 2018
Tool Type
Impact Driver
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Watched ereplacements video on this repair.
Remove hog ring, clean as needed, install new parts.
https://www.youtube.com/watch?v=PQ8lSB_mP1c
Remove hog ring, clean as needed, install new parts.
https://www.youtube.com/watch?v=PQ8lSB_mP1c
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Sleeve broke and lost steel ball
David - March 22, 2018
Tool Type
Impact Driver
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver
!. Removed snap ring and washer.
2. Replaced steel ball.
3. Replaced spring..
4. Replaced sleeve and second spring.
4. Replace washer and snap spring.
2. Replaced steel ball.
3. Replaced spring..
4. Replaced sleeve and second spring.
4. Replace washer and snap spring.
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Driver would fall out of chuck. Washer was slipping past the hog ring.
Peter - February 27, 2018
Tool Type
Impact Driver
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Take the old parts off, put the new ones on.
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Washer and hog ring broke and let spring fly out
Ray - December 27, 2017
Tool Type
Impact Driver
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Small pic
Watched the you tube video
https://www.youtube.com/watch?v=PQ8lSB_mP1c
https://www.youtube.com/watch?v=PQ8lSB_mP1c
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Thanks for voting and helping fellow customers!
broken spring that holds the steel ball
Don - December 22, 2017
Tool Type
Impact Driver
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pocket knife
Got on you tube a guy had a step by step video watched it and followed what he did worked like a charm... It works now like a brand new driver.
https://www.youtube.com/watch?v=PQ8lSB_mP1c
https://www.youtube.com/watch?v=PQ8lSB_mP1c
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Bit not staying in
Russel - November 6, 2017
Tool Type
Impact Driver
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
I watched you video on how to do this repair, thank you. Here is the link
https://www.youtube.com/watch?v=PQ8lSB_mP1c
https://www.youtube.com/watch?v=PQ8lSB_mP1c
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Collar would not hold bit. bottom spring broke
Kevin - September 22, 2017
Tool Type
Impact Driver
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pick, WD40, rag
1. Pulled snap ring with pick
2. Pull sleeve, spring, washer off. Don't drop the ball I have a dozen hiding on my garage floor.
3. Remove broken spring.
4. Clean parts with WD 40 wipe clean.
5. Install new spring.
6. Install ball make sure your on top of spring.
7. Slide sleeve back over anvil
8. Install spring, washer and snap ring. this is sometimes tricky start at the flat opening on anvil using a small blade screw driver work the ring around till it falls back into the recess.
2. Pull sleeve, spring, washer off. Don't drop the ball I have a dozen hiding on my garage floor.
3. Remove broken spring.
4. Clean parts with WD 40 wipe clean.
5. Install new spring.
6. Install ball make sure your on top of spring.
7. Slide sleeve back over anvil
8. Install spring, washer and snap ring. this is sometimes tricky start at the flat opening on anvil using a small blade screw driver work the ring around till it falls back into the recess.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
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Learn MoreOur 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.
