Product Description
carbon brush J204 20*32*50mm is a sliding contact body that conducts current, which guides the rotor current required for motor operation into the rotor coil through the connecting piece on the slip ring. The fit and smoothness between the carbon brush and the connecting piece, as well as the size of the contact surface, affect its lifespan and reliability. In a DC motor, it also undertakes the task of reversing (rectifying) the alternating electromotive force induced in the armature winding.
Product Parameters
Type |
resistivity
μΩ·m |
Rockwell hardness steel ball 10mm |
volume density g/cm3 |
Short circuit commutator test |
Basic value |
Load N |
Contact voltage drop of a pair of brushes V |
50h wear and tear ≤mm |
frictional coefficient ≤ |
current density
A/ cm2 |
J201 |
3.5 |
90 |
588 |
2.95 |
1.5 |
0.18 |
0.25 |
15 |
J203 |
8.8 |
75 |
588 |
2.21 |
1.8 |
0.15 |
0.20 |
12 |
J204 |
0.6 |
95 |
588 |
4.04 |
1.1 |
0.30 |
0.20 |
15 |
J204A |
0.8 |
90 |
588 |
4.05 |
1.1 |
0.30 |
0.20 |
15 |
J205 |
6 |
87 |
588 |
3.2 |
≤2 |
0.50 |
0.25 |
15 |
J205A |
2.5 |
89 |
588 |
3.2 |
≤2 |
0.50 |
0.25 |
15 |
J206 |
4 |
93 |
588 |
2.70 |
1.5 |
0.30 |
0.20 |
15 |
Detailed Photos

Product Features:
> The carbon brush J204 20 * 32 * 50mm has a long service life and does not wear the commutator or collector ring.
> The carbon brush J204 20 * 32 * 50mm operates without
overheating, with low noise, reliable assembly, and no damage.
> The carbon brush J204 20 * 32 * 50mm is worn to a certain extent and needs to be replaced with a new one. All carbon brushes should be replaced at once. If the new and old are mixed, there may be uneven current distribution.
Applications and Features:
carbon brush J204 20*32*50mm is used on the commutator or slip ring of the motor, as a sliding contact for exporting and introducing current. It has good conductivity, thermal conductivity, and lubrication performance, and has a certain mechanical strength and the instinct for commutation sparks. Almost all motors use carbon brushes, which are an important component of the motor. J204 carbon brushes are widely used in various AC and DC generators, synchronous motors, battery DC motors, crane motor collector rings, various types of welding machines, and so on.

Related Products
Yoyik offers different types of Hydraulic filters for industrial users:
room temperature vulcanizing silicon rubber GDZ421
sealant injector KH-35
TR3 Linseed oil TR3 1 Gallon steam turbine sealing compound
Loctite Sealant 271 50ml
generator cap Sealant 5630W351
epoxy Glass poly acid film powder mica tape HFCS5443-18
Adhesive powder mica tape 5461
generator insulating washer TN-9001
mica tape 14611
insulating plate 1*1000*2000
insulating plate 1.5*1000*2000
Steel plate paper 1.5*900*1200
room temp curing solvent-free varnish 841A+841B
sealant injector KH32
Air-dry Polyester Red Insulating Varnish J1348
Packaging & Shipping
Standard & solid packaging ensures your goods safety.

Various professional packages at your choice
Multiple choice of reliable and cost-effective shipping methods available.
Company Profile
- ABOUT US -
Dongfang Yoyik Engineering Co., Ltd is located in Deyang, Sichuan, China's heavy equipment base, was founded in 2004. The company is a professional power plant spare parts manufacturer and supplier. Our products are applicable for many thermal power plants, hydropower plants, metallurgic industrial power plant, cement plant power house, aluminum plant power house, and coal mill power plants.
From advanced precision electric elements and components to highly-customized metal items, you can find all the needed for a power plant from Yoyik.
Yoyik is the exclusive agent of W.M. Nugent CO Inc for selling Nugent filter elements and filtration system products in China. The company also has great advantages in of many hydraulic products, including pumps, valves, sealing materials, etc. the brands include Eaton, Vickers, Moog, star, copaltite, temp-tite, 707, etc.
Our Advantages
- TECHNICAL PATENTS -
- OUR ADVANTAGE -
- COOPERATIVE INDUSTRIES -
Yoyik offers wide range of spare parts for customers in different industries:
FAQ
- ORDER NOTES -
√ Model Selection
Before purchasing, please ensure that the model specifications you provide are complete or that the drawings have been drawn so that you can provide timely and accurate quotations.
√ Quality Assurance
We promise to provide high-quality products and after-sales service. If there are any quality issues, please contact us promptly.
√ Secure Transactions
We sell on MIC, provide a secure and reliable trading environment, and accept multiple payment methods to facilitate your purchase.
- FAQ -
- Are you trading company or manufacturer?
We are factory located in Deyang, China.
- How long is your delivery time?
Generally it is 2-5 days if the goods are in stock. Or it is 7-21 days if the goods are not in stock, it is according to quantity.
- Do you provide samples? Is it free or extra?
Sorry we do not offer samples.
- What price terms do you accept?
Our company can accept all trading manners, eg. EXW, FOB, CIF etc
- What payment terms do you accept?
We accept T/T.