Easy
Less than 15 minutes
The lock button fits next to the spring and the o-ring. This item is priced individually and is made of plastic. It is a genuine DeWALT replacement part that is sourced from the original manufacturer for use with angle grinders. A screwdriver may be helpful when replacing this part. It will need replacing if it becomes broken.
Lock Button N278899
OEM part for: DeWALT
Part Number: N278899
$4.99
In Stock
Ships within 1 business day 
Jump To:
Frequently Purchased Together ?
Compatibility
This part will fit the following 119 machines
DeWALT
DWE402 4-1/2" Small Angle Grinder View Diagrams & Manuals
DWE402N (1) 4-1/2" Angle Grinder View Diagrams & Manuals
DWE402N (2) 4-1/2" Angle Grinder View Diagrams & Manuals
DWE402N (4) 4-1/2" Angle Grinder View Diagrams & Manuals
DWE402G (Type 1) 4-1/2in Angle Grinder View Diagrams & Manuals
DWE402G (Type 2) 4-1/2in Angle Grinder View Diagrams & Manuals
DWE402K (Type 1) 4-1/2in Angle Grinder View Diagrams & Manuals
DWE402K (Type 2) 4-1/2in Angle Grinder View Diagrams & Manuals
DWE4214 (Type 1) 4-1/2in Angle Grinder View Diagrams & Manuals
DWE4214 (Type 2) 4-1/2in Angle Grinder View Diagrams & Manuals
DWE402W (Type 1) 4-1/2in Angle Grinder View Diagrams & Manuals
DWE43066 (Type 1) 5/6 13a Small Angle Trigger Switch Grinder View Diagrams & Manuals
DWE43066N (Type 1) 5/6 13a Small Angle Trigger Switch Grinder View Diagrams & Manuals
DWE43131 (Type 1) 4-1/2/5in 13a 1700mw View Diagrams & Manuals
DWE43140 (Type 1) 6in 13a 1700mwo 9k S View Diagrams & Manuals
DWE43144 (Type 1) 6in 13a 1700mwo 9k View Diagrams & Manuals
DWE43144N (Type 1) 6in 13a 1700mwo 9k View Diagrams & Manuals
DWE46103 (Type 1) 6in 13a Tuckpoint Gr View Diagrams & Manuals
DWE4222 (Type 1) 4-1/2in/5in Pad Sag View Diagrams & Manuals
DWE4222N (Type 1) 4-1/2 Paddle Sag View Diagrams & Manuals
DWE4222N (Type 3) 4-1/2 Paddle Sag View Diagrams & Manuals
DWE4224 (Type 1) 4-1/2 Sag, Slide View Diagrams & Manuals
DWE43114 (Type 1) 4-1/2i5in 13a,11k Rp View Diagrams & Manuals
DWE43114N (Type 1) 4-1/2" - 5" HIGH PERFORMANCE PADDLE SWITCH GRINDER View Diagrams & Manuals
DWE43115 (Type 1) 4-1/2/5in 13a 11k Tr View Diagrams & Manuals
DWE43115N (Type 1) 4-1/2/5in 13a 11k Tr View Diagrams & Manuals
DWE43116 (Type 1) 4-1/2-5/6i 13a 9k Tr View Diagrams & Manuals
DWE43113 (Type 1) 4.5-6in 13a Trig Swi View Diagrams & Manuals
DWE46144N (Type 1) 6in 9krpm No Lock On View Diagrams & Manuals
DWE46166N (Type 1) 6in 9krpm, No Loc On View Diagrams & Manuals
DWE402G (Type 4) 4-1/2-Inch Heavy-Duty Small Angle Grinder View Diagrams & Manuals
DWE402K (Type 4) 4-1/2-Inch Heavy-Duty Small Angle Grinder View Diagrams & Manuals
DWE4214 (Type 4) 4-1/2-Inch Heavy-Duty Small Angle Grinder View Diagrams & Manuals
DCG414B-B3 (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG414B (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG414T1-B2C (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG414T1 (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG414T2-AR (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG414T2-B2 (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG414T2-B3 (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG414T2-BR (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG414T2 (Type 3) Small Angle Grinder Power Tool View Diagrams & Manuals
DCG418B (Type 1) Angle Grinder Power Tool View Diagrams & Manuals
DCG418X1 (Type 1) Angle Grinder Power Tool View Diagrams & Manuals
DCG418X2 (Type 1) Angle Grinder Power Tool View Diagrams & Manuals
DWE402 (Type 1) 4-1/2in 11a Ang Grnd Power Tool View Diagrams & Manuals
DWE402 (Type 15) 4-1/2in 11a Ang Grnd Power Tool View Diagrams & Manuals
DWE402 (Type 2) 4-1/2in 11a Ang Grnd Power Tool View Diagrams & Manuals
DWE402 (Type 3) 4-1/2in 11a Ang Grnd Power Tool View Diagrams & Manuals
DWE402 (Type 4) 4-1/2in 11a Ang Grnd Power Tool View Diagrams & Manuals
DWE402G (Type 15) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402G (Type 3) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402K (Type 15) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402K (Type 3) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402N (Type 1) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402N (Type 15) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402N (Type 2) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402N (Type 3) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402N (Type 4) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE402W (Type 3) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE4212-AR (Type 1) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4212-AR (Type 3) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4212-B2 (Type 1) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4212-B2 (Type 3) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4212-B3 (Type 1) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4212-B3 (Type 3) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4212-BR (Type 1) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4212-BR (Type 3) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4214-AR (Type 1) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4214-AR (Type 3) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4214-B2 (Type 1) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4214-B3 (Type 1) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4214-BR (Type 1) 1200w 5 In Small Angle Gr Power Tool View Diagrams & Manuals
DWE4214 (Type 15) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE4214 (Type 3) 4-1/2in Angle Grinder Power Tool View Diagrams & Manuals
DWE43066 (Type 2) 5/6 13a 1700mwp 9k T Power Tool View Diagrams & Manuals
DWE43066N (Type 2) 5/6 13a 1700mwo 9k T Power Tool View Diagrams & Manuals
DWE43113 (Type 2) 4.5-6in 13a Trig Swi Power Tool View Diagrams & Manuals
DWE43114 (Type 2) 4-1/2i5in 13a,11k Rp Power Tool View Diagrams & Manuals
DWE43114N (Type 2) 4-1/2/5in 13a 11k Rp Power Tool View Diagrams & Manuals
DWE43115 (Type 2) 4-1/2/5in 13a 11k Tr Power Tool View Diagrams & Manuals
DWE43115N (Type 2) 4-1/2/5in 13a 11k Tr Power Tool View Diagrams & Manuals
DWE43116 (Type 2) 4-1/2-5/6i 13a 9k Tr Power Tool View Diagrams & Manuals
DWE43116N (Type 1) 4-1/2 5/6 Tr Gr Grinder Power Tool View Diagrams & Manuals
DWE43116N (Type 2) 4-1/2 5/6 Tr Gr Grinder Power Tool View Diagrams & Manuals
DWE43131 (Type 2) 4-1/2/5in 13a 1700mw Power Tool View Diagrams & Manuals
DWE43140 (Type 2) 4 1/2in Trim Saw Power Tool View Diagrams & Manuals
DWE43144 (Type 2) 4 1/2in Trim Saw Power Tool View Diagrams & Manuals
DWE43144N (Type 2) 4 1/2in Trim Saw Power Tool View Diagrams & Manuals
DWE4315-B3 (Type 1) 5in 1500w Angle Grinder Power Tool View Diagrams & Manuals
DWE43214 (Type 1) 5in Grinder, Variable Speed, Paddle Switch Power Tool View Diagrams & Manuals
DWE43214N (Type 1) 5in Brshls Angle Grinder Power Tool View Diagrams & Manuals
DWE43214NVS (Type 1) 5in Var Speed Pad Sw Angle Grinder Power Tool View Diagrams & Manuals
DWE43231VS (Type 1) 5in Brshls Angle Grinder, Variable Speed, 5-Inch, 13-Amp Power Tool View Diagrams & Manuals
DWE4324-B2 (Type 1) Sag 5in Brushless Grinder Power Tool View Diagrams & Manuals
DWE4324-B3 (Type 1) Sag 5in Brushless Grinder Power Tool View Diagrams & Manuals
DWE43240INOX (Type 1) 5-6in Brshls Vs Angle Grinder Power Tool View Diagrams & Manuals
DWE43240VS (Type 1) 5-6in Brshls Pad Angle Grinder Power Tool View Diagrams & Manuals
DWE43244N (Type 1) 5-6in Brshls Pad Sw Angle Grinder Power Tool View Diagrams & Manuals
DWE4324N-AR (Type 1) Sag 5in Bl Grind Paddle 1 Power Tool View Diagrams & Manuals
DWE4324N-B2 (Type 1) Sag 5in Bl Grind Paddle 1 Power Tool View Diagrams & Manuals
DWE43265N (Type 1) 5-6in Brhsls Angle Grinder Power Tool View Diagrams & Manuals
DWE4336-AR (Type 1) 5in 1500w Angle Grinder Power Tool View Diagrams & Manuals
DWE4336-B2 (Type 1) 5in 1500w Angle Grinder Power Tool View Diagrams & Manuals
DWE4336-B2C (Type 1) 5in 1500w Angle Grinder Power Tool View Diagrams & Manuals
DWE4336-B3 (Type 1) 5 1500w Angle Grinder Power Tool View Diagrams & Manuals
DWE4336-BR (Type 1) 5in 1500w Angle Grinder Power Tool View Diagrams & Manuals
DWE43840CN (Type 1) 7in Brshls Grinder Rat Power Tool View Diagrams & Manuals
DWE46103 (Type 2) 6in 13a Tuckpoint Gr Power Tool View Diagrams & Manuals
DWE46202 (Type 1) 5in Brhl Brushless Tuckpointing Grinder Kit Power Tool View Diagrams & Manuals
DWE46253 (Type 1) 5in Brhl Brushless Surface Grinding Power Tool View Diagrams & Manuals
DWE46266N (Type 1) 5 In. / 6 In. Brushless Small Angle Grinder Power Tool View Diagrams & Manuals
DWE4314-B2 (Type 1) 4 1/2in Trim Saw Power Tool View Diagrams & Manuals
DWE4314-B3 (Type 1) 4 1/2in Trim Saw Power Tool View Diagrams & Manuals
DWE4314N-AR (Type 1) 4 1/2in Trim Saw Power Tool View Diagrams & Manuals
DWE4314N-B2 (Type 1) 4 1/2in Trim Saw Power Tool View Diagrams & Manuals
DWE4314N-BR (Type 1) 4 1/2in Trim Saw Power Tool View Diagrams & Manuals
DWE46144N (Type 2) 6in 9krpm No Lock On Power Tool View Diagrams & Manuals
DWE46166N (Type 2) 6in 9krpm, No Loc On Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Grinder Parts
Customer Part Reviews ?
Average Rating (out of 5):
Click to filter by ratings:
5 stars
1
4 stars
1
3 stars
0
2 stars
0
1 stars
0
< PREV
- 1
Part worked as expected!!
Part was delayed in shipment, but I was kept informed throughout the process.
Bill -
September 13, 2023
Verified Purchase
yes
Work
Daniel -
August 9, 2019
Verified Purchase
t
t
t -
t days ago
Verified Purchase
eReplacementParts Team
t
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Lock Button
No questions have been asked yet
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.
power tru switch but moter wouldn't turn
Jayson - August 27, 2021
Tool Type
Grinder
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, torx
1. removed side covers . 2. remove brush wires and brushes . 3 install new brushes and side covers .
Did you find this story helpful?
Thanks for voting and helping fellow customers!
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.
