Innovative oil-free bushing bearings feature that provide unique performance advantages. High load capacity, self-lubrication options, and plugged graphite designs. Oilless Bushing. Bronze Castings. Straight Type. Material Base Bronze. Solid lubricant Graphite.

Copper self-lubricating oil-free bushing bearings, also known as oilless bushings, are a type of bearing that can operate without the need for external lubrication. They are made of a copper alloy, often with embedded solid lubricants such as graphite, which provides self-lubricating properties.

These bearings are designed to work continuously under conditions of no oil lubrication, making them suitable for heavy load and low-speed conditions. They exhibit good wear resistance and a very low friction coefficient. They are also suitable for reciprocating, rotating, and intermittent motion where an oil film is difficult to form.

Oilless Bearing bushings – maintenance-free
Self-lubricating slide bearings with dry lubricating

Copper Alloy + Graphite, copper alloy machining parts

Oil Free Bushings from China for industrial applications. Free CAD downloads, quick delivery, competitive pricing, and small minimum order quantity.

Machining Bronze Bushings, Plain Bearings, Liner Plates, Washers, and 500SP Copper Alloy Oilless Components

Bronze is a popular choice for creating plain bearings, bushings, liner plates, washers, and oilless components due to its excellent wear resistance, high load-carrying capacity, and good corrosion resistance. The 500SP series is a type of copper alloy commonly used for creating oilless components in a variety of applications. Here’s an overview of machining these parts:

1. Material Selection: Choose the right type of bronze alloy for your application. The 500SP series is a popular choice for oilless components due to its embedded solid lubricant particles, which provide self-lubricating properties.
2. Machining Process: For machining bronze components, the most commonly used methods include turning, milling, drilling, and grinding. The specific process depends on the desired shape and size of the component. Use cutting tools with sharp edges and high-quality cutting fluid to ensure smooth machining and prevent workpiece deformation.
3. Cutting Speed and Feed Rate: The optimal cutting speed and feed rate depend on the type of bronze alloy, the machining process, and the tooling used. In general, lower cutting speeds and feed rates are recommended for bronze alloys with high lead content, while higher cutting speeds and feed rates can be used for alloys with lower lead content. Make sure to monitor tool wear and adjust the parameters accordingly.
4. Tool Material: Carbide cutting tools are recommended for machining bronze due to their high wear resistance and ability to maintain a sharp edge. High-speed steel (HSS) tools can also be used, but they may require more frequent sharpening and replacement.
5. Lubrication and Cooling: Proper lubrication is essential when machining bronze components to minimize tool wear and achieve a high-quality surface finish. Use a high-quality cutting fluid and ensure adequate cooling during the machining process.
6. Finishing and Deburring: After machining, it’s important to finish and deburr the component to remove any sharp edges or rough surfaces. This can be done using manual deburring tools, sandpaper, or specialized finishing machines.
7. Quality Control and Inspection: Inspect the machined components for dimensional accuracy, surface finish, and any potential defects. Use measuring instruments like calipers, micrometers, and surface roughness testers to ensure the components meet the required specifications.

By following these guidelines, you can effectively machine bronze bushings, plain bearings, liner plates, washers, and 500SP copper alloy oilless components for a wide range of applications.

Here is a table summarizing the different properties of the copper alloys mentioned for precision machining of bearing bushings:

We can provide different grades of copper alloys based on various working conditions and process them into different forms and designs with various groove styles, as per the requirements.

Product information ALLOY CuZn25Al5 Maintenance-free sliding bushing elements

Oil-free Bushing Series. Bronze plain bearings with solid lubricant inserts
Maintenance-free cast bronze plain bearings with graphite inserts
The Oil-free Bushing series of solid bronze plain bearings with solid graphite lubricant inserts combines the advantages of both worlds. On the one hand, the insert with a base made of turned bronze has the advantages of a solid plain bearing, such as high load capacity and excellent suitability for shock loads. On the other hand, thanks to the solid lubrication of the plain bearings, the regularly recessed lubricant reservoirs allow for longer maintenance intervals.

In these recesses, the bronze plain bearings absorb dust particles and the coefficient of friction at the bearing position is reduced by solid lubrication with graphite.Oil-free Bushing’s solid cast bronze plain bearings conform to ISO 4379 and are also characterized by their resistance to high temperatures above 250°C and low wear – even under high loads.

Oil Free Bushings Size

What is CuSn12?

CUSN12 is likely a reference to a specific type of metal alloy. CUSN12 is typically abbreviated code for an alloy of copper, nickel, and tin, known as “C12200” in the North American market. This alloy is commonly used for a variety of applications, including electrical conductors and plumbing fittings, due to its good electrical and thermal conductivity, high resistance to corrosion and dezincification, and ease of fabrication.

Alloy CuSn12 is a phosphor bronze, often referred to as “gear bronze”, which meets the requirements of DIN 1705 alloy GC-CuSn12. CuSn12 has good machinability, high strength and good corrosion resistance to seawater and salt water, making it suitable for use in pump and valve components.

MPTZ25-20 (54*6/25*33*20)
MPTZ25-25 (54*6/25*33*25)
MPTZ25-30 (54*6/25*33*30)
MPTZ25-35 (54*6/25*33*35)
MPTZ25-40 (54*6/25*33*40)
MPTZ25-45 (54*6/25*33*45)
MPTZ25-50 (54*6/25*33*50)
MPTZ25-60 (54*6/25*33*60)
MPTZ25-70 (54*6/25*33*70)
MPTZ25-80 (54*6/25*33*80)
MPTZ30-25 (63*8/30*38*25)
MPTZ30-30 (63*8/30*38*30)
MPTZ30-35 (63*8/30*38*35)
MPTZ30-40 (63*8/30*38*40)
MPTZ30-45 (63*8/30*38*45)
MPTZ30-50 (63*8/30*38*50)
MPTZ30-60 (63*8/30*38*60)
MPTZ30-70 (63*8/30*38*70)
MPTZ30-80 (63*8/30*38*80)
MPTZ30-90 (63*8/30*38*90)

Worldwide equivalents of grade   Oil-free Bushing GK-CuZn25Al5 (Germany: DIN, WNr ) Maintenance-free sliding elements

GK-CuZn25Al5 Germany Standard  :   DIN 1709-1981 for GK-CuZn25Al5 (DIN, WNr )   and its European equivalent CuZn25Al5Mn4Fe3-C ( EN ) Oil-free Bushing

CuZn25Al5 alloy Oil-free Bushing Maintenance-free sliding bearing
CuZn25Al5 is a high-strength manganese bronze or high-tensile brass.
Alloy CuZn25Al5 Oil-free Bushing has exceptional strength, good wear properties, and good ductility, but poor machinability.
It is suitable for super-heavy slow-speed bearings and hydraulic cylinder components with good lubricity.
Oil-free Bushing Alloy CuZn25Al5 has good corrosion resistance, but may be susceptible to dezincification under certain conditions.
It is prone to dezincification under conditions.
The composition and casting conditions of alloy CuZn25Al5 are strictly controlled. The product is
manufactured using the latest continuous and centrifugal casting techniques.

Maintenance-free sliding elements Oil-free Bushing Alloy CuZn25Al5 – Manganese Bronze Summary of Properties
Chemical Composition – Percentage
Element Name
Copper 60.0 – 65.0 63.0
Aluminum Al 5.0 – 7.5 5.7
Iron Fe 2.0 – 4.0 3.0
Manganese Mn 2.5 – 5.0 3.5
Nickel Ni 0.5 max
Tin Sn 0.2 max
Lead Pb 0.2 max.
Zinc Zn Balance
Mechanical properties [typical] Continuous casting
Yield strength 460 Mpa (67,000 psi)
Ultimate tensile strength 780 Mpa (113,000 psi)
Elongation 15%
Typical hardness 210 BHN
Specific gravity 8.2
Machinability grade (free machining brass = 100) 8
Maximum Operating Temperature Operating Temperature 260oC (500O
F)
Strain relief temperature 260oC (500O F)
F)
Time at temperature 1 hour per 25 mm section thickness
Comparative Specifications
AS1565 C86300; ASTM B505, B271 – C86300; SAE 430B*; BS1400 – HTB3*; DIN 1709 – CuZn25Al5  Oil-free Bushing*;
* Similar but not identical

Straight Bushings (LSB)， Oilless bushing

Oilless Slide Bushing China Factory Price, Manufacturers & SuppliersSpecifications:
C86300 HTB3* / CuZn28Al5FeMn3 Oil-free Bushing / CuZn25Al5Mn4Fe3 Oil-free Bushing 2.0598 / CuZn25Al5*CAC304 (HBsC4) C86300

Material

• #500SP(CAC304+Graphite) Oil-free Bushing
• cac304 brass corresponds to domestic grade A cac304, high force brass domestic material. High force brass is a variety of alloys consisting of more than two elements called special brass. As by aluminum, lead, tin, manganese, nickel, iron, and silicon composition of copper alloy, high force brass is one of them.