Easy
15-30 minutes
This is a genuine replacement part manufactured for use with angle grinders. The switch is located inside the handle and is used to relay electricity from the cord to the motor. A sign of a bad switch is trouble starting up then running smoothly once the grinder gets started. This switch is sold individually.
Switch 5140021-92
OEM part for: Porter Cable, Black and Decker
Part Number: 5140021-92
$22.38
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 10 machines
Black and Decker
G950C Type 1 Grinder View Diagrams & Manuals
G950 Type 1 Grinder View Diagrams & Manuals
FS8500AG FireStorm 8.5A - 4-1/2" Angle Grinder View Diagrams & Manuals
11651 Type 2 4-1/2 Small Angle Grinder View Diagrams & Manuals
QP650B Type 1 4-1/2 Angle Grinder View Diagrams & Manuals
FS8500AG (Type 1) 4-1/2 Angle Grinder Power Tool View Diagrams & Manuals
G950-B3 (Type 1) Small Angle Grinder Power Tool View Diagrams & Manuals
G950B-B3 (Type 1) Small Angle Grinder Power Tool View Diagrams & Manuals
Porter Cable
PC750AG Type 1 7.5 Amp Small Angle Grinder View Diagrams & Manuals
PC750AG (Type 2) Angle Grinder Power Tool View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Grinder Parts
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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.
Power switch stuck in on position
Carl - September 14, 2023
Tool Type
Grinder
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
Parts Used
1. Removed grip cover
2. Remove old switch.
3. Install new switch
4. Remove original brushes
5. Install new brushes.
6. reposition trigger switch mechanism.
7. Reinstall grip covers.
2. Remove old switch.
3. Install new switch
4. Remove original brushes
5. Install new brushes.
6. reposition trigger switch mechanism.
7. Reinstall grip covers.
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Spring broke in the off/on switch
Sherman - August 4, 2023
Tool Type
Grinder
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
3s crews to open the case then there are 4 wires on the switch to swap out. Quick and easy. Just snap a photo to get the wires back it the original position s.
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Grinder would not shut off
Wayne - March 12, 2018
Tool Type
Grinder
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Simply changed damaged switch with the new one I got from you. I'm very happy, and impressed how fast the part came... well done!
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Broken trigger switch
frankye - August 11, 2017
Tool Type
Grinder
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Torx bit
Parts Used
Removed handle covers, removed the wires to switch, pulled the switch out and replaced with new one, installed wires and replaced handle covers, relatively straight forward and easy
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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.
