Easy
15-30 minutes
A genuine DeWALT item that is supplied directly from the original equipment manufacturer for use with cordless drills. It is an identical replacement for the motor that drives the chuck. Over time components may wear out and they may begin to fail eventually requiring a replacement. Keep in mind this high-quality motor and pinion is sold as an individual item. Check the appropriate diagrams for your model to ensure the correct repair procedure. A screwdriver and pliers will be needed to replace this motor and pinion.
Motor And Pinion 396505-21SV
OEM part for: DeWALT
Part Number: 396505-21SV
$54.09
In Stock
Ships within 1 business day 
Compatibility
This part will fit the following 25 machines
DeWALT
DW983 Type 1 Cordless Drill View Diagrams & Manuals
DW984 Type 1 Cordless Hammer Drill View Diagrams & Manuals
DW985 Type 1 Cordless Hammer Drill View Diagrams & Manuals
DC985 Type 1 14.4V Cordless Hammer Drill View Diagrams & Manuals
DC984 Type 1 14.4V Cordless Hammer Drill View Diagrams & Manuals
DC984V Type 1 14.4V Cordless Hammer Drill View Diagrams & Manuals
DC983 Type 1 14.4V Cordless Drill View Diagrams & Manuals
DCD939 Type 1 14.4V HMRDR/Drill/Drive/Driver View Diagrams & Manuals
DC985KA (Type 1) Cordless Hammer Drill View Diagrams & Manuals
DCD939KX (Type 1) 1/2-In. Cordless Hammer Drill View Diagrams & Manuals
DCD939KX (Type 2) 1/2-In. Cordless Hammer Drill View Diagrams & Manuals
DCD939VX (Type 1) 14.4v Hammerdr/Drill/Driver View Diagrams & Manuals
DCD939VX (Type 2) 14.4v Hammerdr/Drill/Driver View Diagrams & Manuals
DW983K-2 (Type 1) 14.4v Adj Clutch Drill/Dri View Diagrams & Manuals
DW984K-2 (Type 1) 14.4v Hammerdrill/Drill/D View Diagrams & Manuals
DW984KV-2 (Type 1) 14.4v Hammerdrill Kit View Diagrams & Manuals
DW985K-2 (Type 1) 14.4v Hammerdrill/Drill/D View Diagrams & Manuals
DW985KV-2 (Type 1) 14.4v Hammerdrill Kit W/ View Diagrams & Manuals
DC983KA (Type 1) 14.4v Drill/Driver View Diagrams & Manuals
DC984KA (Type 1) 14.4v Hammerdrill View Diagrams & Manuals
DC984VA (Type 1) Drill/Driver View Diagrams & Manuals
DC985VA (Type 1) Hammer Drill View Diagrams & Manuals
DC984KA-AR (Type 1) Combination Unit Power Tool View Diagrams & Manuals
DC984KA-B2 (Type 1) Combination Unit Power Tool View Diagrams & Manuals
DC984KA-BR (Type 1) Combination Unit Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Cordless Drill Parts
- Drill Parts
- Hammer Drill Parts
This part replaces obsolete part #: 396505-21
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Repair made easy
I was pleased when I was able to find the part I needed on eReplacementParts. The part came without delay and it fit perfectly. My cordless drill is back in operation
Guest -
December 1, 2020
Verified Purchase
Works as expected.
Product was in perfect condition. Slightly complicated install, but all works well.
Guest -
November 18, 2019
Verified Purchase
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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.
The motor had failed due to a piece of wire getting jammed in it
Paul - December 15, 2016
👍 2 of 2 people found this instruction helpful
Tool Type
Cordless Drill
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers
Parts Used
1. Checked excellent eReplacementparts video on YouTube first. Really excellent
2. Opened the case
3. Disconnecting brush wires
4. Removed old motor
5. Cleaned and repacked transmission while it was open
6. Inserted new motor checking alignment as per video
7. Closed case
8. Attached brush wires
9. Put end cover back on
Tested
2. Opened the case
3. Disconnecting brush wires
4. Removed old motor
5. Cleaned and repacked transmission while it was open
6. Inserted new motor checking alignment as per video
7. Closed case
8. Attached brush wires
9. Put end cover back on
Tested
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Sparks from the motor
James - December 15, 2015
👍 2 of 2 people found this instruction helpful
Tool Type
Cordless Drill
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Remove the screws from the housing and the battery. Take one half of the housing off .Take a picture of the internal parts. Remove the defective motor and install the new motor, make sure all the internal part are place where they should be. Replace the screws in the housing. Done.
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Smoking during use
John - March 6, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Hammer Drill
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Torx driver
Removed all torx screws from rear cover, then from transmission cover then remaining from handle. Separate halves
Critical to note orientation of motor as viewed from back and orientation of transmission
Remove wire connections and motor,
Clean housing and old grease as needed.
Install new motor with same wire holder and motor adaptor in back end of housing
Connector wires in proper orientation green to positive side.
Replace other half of housing.
Install transmission to motor with tension pin in proper orientation, direction lever in forward Position and torque lever in the #2 position. Slide together.
Reinstall torx screws in transmission housing
Reinstall torx screws in handle halves
Reinstall Motor cover onto back and reinstall torx screws
Critical to note orientation of motor as viewed from back and orientation of transmission
Remove wire connections and motor,
Clean housing and old grease as needed.
Install new motor with same wire holder and motor adaptor in back end of housing
Connector wires in proper orientation green to positive side.
Replace other half of housing.
Install transmission to motor with tension pin in proper orientation, direction lever in forward Position and torque lever in the #2 position. Slide together.
Reinstall torx screws in transmission housing
Reinstall torx screws in handle halves
Reinstall Motor cover onto back and reinstall torx screws
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Smoking and sparking drill
Jim - May 22, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Cordless Drill
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Easy fix. I did not know the new motor already has the brush set in place ( I also ordered a set of brushes). Now I have a back up set of brushes. After taking the drill casing 1/2 off, I used my cell to take pictures just in case I had problems getting the drill back together. I will say this as a piece of advice for all: Any time you remove any screws from a plastic case, when you are putting the tool back together you should always first turn the screw backwards until you feel a slight click from the screw trying to seat itself. Then change direction to clockwise to drive the screw in. This will keep you from striping the plastic case screw hole.
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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.
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