Project Description
Trusted Oilless Bearings services
Trusted & reliable Bronze Oilless Parts services
Trusted handyman services
A manufacturing consultant and engineer, supplies a broad range of standard bronze oilless parts and self-lubricating bushing, wear plates for for dry applications
Designs a growing, market-leading portfolio of Graphite Bronze Bushing
We help engineer the next generation of machinery and equipment through customer-centric innovation and application knowledge. Our expertise spans both established and emerging global industries — from food production and transportation to automation and renewable energy.
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Application Scenarios
Intelligent Mechanical Support
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graphite Bronze Bushing Design | Size & Material
The graphite bronze bushing design may be simple or complex. It may amount to picking a bearing from a catalog on the basis of PV factor or may require a sophisticated analysis of lubricant flow.
Most slow-moving or self-lubricated bearings are boundary lubricated. These are generally simple cylinders or flat washers. Grooves may be added to feed lubricant to load-bearing surfaces in boundary-lubricated bearings. Design variables are material, lubricant, and bearing size. Lubricant and material determine the load limit. Size is based on keeping within the lubricant/material limitations.
How oil-free Graphite bronze bushings work
Due to the heavy equipment, high ambient temperature, large dust or acidic corrosive gases CO, sulfur dioxide, etc. in the air, it brings many problems to the lubrication of equipment. For this reason, the research on self-lubricating graphite bronze bushing composite materials has With its characteristics, it is composed of a metal substrate and a solid lubricant paste embedded in the holes or grooves of the substrate. During the friction process, the graphite bronze bushing metal substrate bears most of the load. After friction, the solid lubricant in the hole or groove is transferred or reversely transferred to the friction surface, and a solid transfer film,, with good lubrication, firm adhesion and uniform coverage is formed on the friction surface, which greatly reduces friction and wears. As the friction progresses, the embedded solid lubricant is continuously supplied to the friction surface, ensuring good lubrication during long-term operation.
Application of Oilless Graphite Bronze Bushing
Oilless graphite bronze bushing is widely used in a metallurgical continuous casting machine, train support, rolling equipment, mining machinery, ships, and steam turbines, such as high temperature, high load, low-speed heavy load occasion use; in low load, high temperature, medium speed and other occasions, such as fireplace door, oven raceway, rubber machinery, light industry machinery, machine tool industry; its end face can be used with the substrate welding installation, so it is suitable for metallurgical machinery, construction machinery, oil transmission Machinery and other areas that can not be refueled; in the lifting machinery support parts are particularly adapted, such as winch support, crane support, excavator support.
Select Your Graphite Bronze Bearing Material
Material requirements
Graphite bronze bushing Metal matrix: 1. Good mechanical strength and adaptability to working conditions; 2. Good thermal conductivity and low expansion coefficient; 3. Good wear resistance
Solid lubricant
1. low surface shear stress of graphite bronze bushing lubricant, easy to form a laminar slip between the moving friction pairs 2. high surface adhesion ability, the lubricating film is not destroyed under higher contact pressure 3. low friction coefficient 4. good chemical stability, not easy to deteriorate, also not easy to react with environmental media 5. can adapt to high temperature and low temperature 6. chemical corrosion and galvanic corrosion resistance
Design considerations | Self Lubricating Graphite Bronze Bushing
1. Determination of PV value of graphite bronze bearings
Insert graphite bronze bushingraphite Bearing use load conditions are determined by the product of surface load p and allowable speed v and PV value
2. Inner diameter and width
Increasing the width of graphite bronze bushing can increase the load carrying capacity and reduce the bearing surface load. However, when the width is increased to a certain value, it may reduce the anti-bias load capacity and cooling effect, and damage the bearing prematurely.
3. The thickness of self-lubricating graphite bronze bushings
Considering the thermal expansion, heat conduction, and mechanical strength of the bearing, its thickness only needs to meet the requirements of the machining process.
4. Oilless graphite bronze Bushing clearance
In the design of the graphite plugged bronze bushing fit clearance, due to the influence of some factors on the change of the inner diameter shrinkage
Find out more about the unique benefits of oilless bearing
Advantages Of Graphite Plugged Bronze Bushing
The shape of graphite bronze bushings can vary greatly, with characteristics such as flange, ball, and plate being customized to enhance the overall performance of the application.
The structural feature of self-lubricating graphite bronze bushing is the use of a certain combination of metal base material and solid lubricant, the performance of the two materials complements each other, which can more comprehensively meet the requirements of graphite bronze bearings for construction machinery.
Maintenance free and self-lubricating, friction coefficient is low enough to work under heavy loads.
Sizing and reaming capability
Space saving and weight reduction of the whole parts
Lubrication grooves perform an important task in graphite bronze bushings. The lubricant reaches the bearing point between the bearing and the shaft directly through them. The lubricant protects the shaft and bearing against dirt and moisture and ensures low coefficients of friction.
Key is proper channeling of oil through various shaped grooves or supply holes. Bearings under steady load, such as a horizontal bearing supporting a rotor as dead weight, can be fed by a supply hole or an axial groove in the unloaded portion. Holes or grooves typically locate in the top half of a bearing which is characterized by large annular clearances and low internal oil pressures.
Thrust Washer
Choose from our selection of Self-Lubricating Washer, including cast bronze washers, oilless graphite thrust washers and more. Inquiry! Shop Now or Request a Quote!
Choose your Application
Bronze Oilless Bearings for off-highway equipment. No Need for Complex Greasing System.
Finishing Parts Main Base Alloy
| Performance. & Chemical Compositions | CuZn25Al6FeMn3 High Brass | CuZn25Al6FeMn3 Special Brass | CuSn5Pb5Zn5 Tin Bronze | CuAl10Ni aluminium bronze | CuSn12 Tin bronze | Cast Iron HT250 EB00 |
| Cu% | 65 | 65 | 85 | 80 | 88 | |
| Sn% | 5 | 12 | ||||
| Pb% | 5 | |||||
| Zn% | 25 | 25 | 5 | |||
| Ni% | 5 | |||||
| Al% | 6 | 6 | 10 | |||
| Fe% | 5 | |||||
| Mn% | 4 | 4 | ||||
| Dengity g/cm 3 | 8.0 | 8.0 | 8.8 | 8.3 | 8.8 | 7.3 |
| Hardness | >210 | >180 | >70 | >150 | >80 | >160 |
| Tensile Strength | >750 | >550 | >200 | >500 | >360 | >250 |
| Elongation | >12 | >12 | 15 | >10 | >8 | |
| Coeicient of linear expansion | 1.9·10 -5 /℃ | 1.9·10 -5 /℃ | 1.8·10 -5 /℃ | 1.6·10 -5 /℃ | 1.8·10 -5 /℃ | 1.0·10 -5 /℃ |
| Limit Temp. | 300~400 | 300~400 | 400 | 400 | 400 | 400 |
| Max. Load N/mm 2 | 100 | 80 | 60 | 50 | 70 | 10 |
| Max. Speed m/min | 15 | 15 | 10 | 20 | 10 | 15 |
| Max. PV N/mm2·m/min | 200 | 200 | 200 | 200 | 200 | 40 |
| 400N/mm2 | <0.01 | <0.01 | <0.05 | <0.04 | <0.05 | <0.015 |
Friction of coe. Oil 0.03; Dry 0.16
Alloy International Code
Alloy International Code
Custom Size Options, machining bronze bushings and a supplier of solid bronze oilless bushes and plate delivered on time and on budget.
Oilless Bushing Alloy International Code
| Chinese Code GB1776-87 | International counterparts | Applications | |||
| International ISO 1338 | Japan Jis | (USA) ASTM (UNS) | German DIN | ||
| CuZn25AI6FeMn3 | CuZn25AI6FeMn3 | H5102 CAC304 | B30-92 C86300 | DIN1709 G-CuZn25A/2.0598 | High-load, low speed, general use |
| CuZn25AI6FeMn3 | CuZn25AI6FeMn3 | H3102 CAC304 | B30-92 C86300 | DIN1709 G-CuZn25A/2.0598 | Super high load, low-speed, high duty |
| CuAI10Fe3 | CuAI10Fe3 | H5114 CAC703 | B30-92 95800 | DIN1714 GB-CuAI10NI/2.1096 | Medium load, medium-speed, general use |
| CuSn5Pb5Zn5 | QSn5-5-5 | H5111 CAC406 | B30-92 C83600 | DIN1705 G-Cu5n5ZnPb/2.1096 | Medium load, medium-speed |
| DB5675-85 HT250 | Fe250 | ASTM class40 | low-load, low-speed | ||
Solid Lubricant
| Solid Lubricant | Features | Typical application |
| SSL1(PTFE etc + Add) | Excellent resistance against chemical attacks and low friction. Temp limit 400℃ | Suite for general machines and under atmosphere |
| SL2(PTFE etc + Add2) | Lowest in friction and good of water lubrication,Temp.limit 300℃ | Ship, hydraulic turbine, gas turbine etc. |
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Focus on reducing or eliminating friction, wear and lubrication bronze oilless parts
Manufacturers of maintenance-free sliding elements