100Pcs 7×8×12mm Bilateral Self-Stop Carbon Brush Model 21

100Pcs 7×8×12mm Bilateral Self-Stop Graphite Carbon Brush Model 21

Safety Replacement Warning

Cut off all power supply completely before disassembling motor and replacing carbon brushes to avoid electric shock hazard. Check brush wear regularly to prevent internal motor damage.

Product Overview

Model 21 bilateral auto cutoff graphite carbon brush, standard dimension 7×8×12mm, bulk package of 100 pieces. Each brush is equipped with self-stop safety structure on both sides. When graphite wears to limit position, the power tool will automatically cut power to protect motor coil from burnout. Made of high-density wear-resistant graphite with tightly embedded copper wire, not easy to fall off under high-speed rotation. Universal replacement spare part for multiple specifications of angle grinders, electric hammers, electric grinders and electric planers.

Core Key Advantages

• Bilateral auto self-stop design on each brush for dual motor protection
• High density solid graphite, long service life & stable conductive performance
• Tightly fixed embedded copper wire, anti-fall during long time operation
• Standard universal size 7×8×12mm, model 21 wide compatibility
• 100pcs bulk economical pack for repair shop daily stock
• Fit multi-type angle grinders, electric hammers & planers

Full Technical Specifications

Model No.	21#
Single Size	7×8×12mm
Main Material	High Density Graphite + Embedded Copper Wire
Core Feature	Bilateral Bilateral Auto Cutoff Self-Stop Function
Pack Quantity	100 Pieces Per Bulk Pack
Product Type	Power Tool Motor Replacement Parts

Compatible Equipment Classification

Angle Grinders

Fit G10SF3 100-type angle grinder, S1M-FF04-100a

Electric Hammers

Fit 26-type electric hammer

Mini Electric Grinders

Fit 6mm small electric grinding head

Electric Planers

Fit M1B-FF02-82X1 electric planer

Other Compatible Brands

Suitable for Dragon, Minri series power tools with matching size

Installation & Maintenance Tips

1. Make sure power is fully disconnected before disassembly work.
2. Replace a pair of carbon brushes at the same time for balanced motor operation.
3. Check copper wire tightness before installation to avoid loose contact.
4. Store in dry place to prevent graphite oxidation.

Package Contents

• 100 × Model 21 Bilateral Self-Stop Graphite Carbon Brushes
• Multilingual Specification Instruction Card

Frequently Asked Questions

Q1 What is the size of this carbon brush?

A1 Standard dimension 7×8×12mm, universal model 21 for power tools.

Q2 What’s the difference of bilateral self-stop design?

A1 Each brush has auto cutoff structure on both sides, double protection for motor.

Q3 How many pieces are included in one pack?

A1 Total 100pcs bulk pack for repair shop stock supply.

Q4 What tools can these brushes fit?

A1 Compatible with matching size angle grinders, electric hammers, grinders and planers.