Oil Free Bush

Oil Free Bush

Say goodbye to the hassle of frequent lubrication maintenance. Our self-lubricating technology ensures smooth operation and reduces wear and tear, extending the lifespan of your equipment. Experience uninterrupted productivity and cost savings as you bid farewell to the need for messy lubricants and time-consuming upkeep.

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Oil Free Bush

Oil Free Bush Material: High Strength Brass / Copper Alloy + Solid Lubricant

The #500SP material, recognized for its high-strength brass or copper alloy composition with an integrated solid lubricant, is frequently utilized in crafting oil-free bushings. These bushings are engineered to function without the necessity for external oil or lubrication, rendering them apt for a myriad of industrial uses. The robust brass or copper alloy ensures durability and resistance against wear, while the inclusion of solid lubricants like graphite and PTFE imbues them with self-lubricating qualities. Such features render these bushings perfect for scenarios involving high loads, challenging operational conditions, and settings where traditional lubricants might fail. They find applications across a diverse array of machinery and equipment, ranging from cargo handling and press tools to turbines, hoisting devices, industrial machines, automotive components, precision instruments, and even household appliances. Thanks to their self-lubricating nature, these bushings are virtually maintenance-free, capable of performing under extreme temperatures, submerged environments, or within clean-room conditions where avoiding lubricant contamination is crucial. Available in various designs including cylindrical and flanged bearings, thrust washers, and plates, they meet the specific demands of different applications.

Oilless Bushing spb
SPB OILLESS BUSH SIZE brass bushes lubricating graphite

Oil Free Bush, Bronze Alloys Material: #500SP
(High Strength Brass / Copper Alloy + Solid Lubricant), Need A Quote? Start the process and Contact us today!

Shop For Oil-Free Bushing & Self-lubricated Graphite Parts At Bronzelube.Com, Supply High-Strength Brass Bearings To Your Specifications.

Partner with VIIPLUS

Our cast bronze bushings and thrust washers, known for their robust strength and durability, significantly extend the lifespan and improve the performance of oil and gas equipment, industrial machinery, and other essential high-wear systems. To discover more about our diverse product range and find the ideal solution for your specific needs, please reach out to us today.

Self-Lubricating Cast Bronze Bushings with Solid Lubricant Inserts

Self-lubricating cast bronze bushings with solid lubricant inserts are highly efficient and maintenance-free solutions for various demanding applications. These bushings are specifically designed to perform under challenging conditions, including environments exposed to water, oil, or grease. Below are the key details and specifications of these bushings:

Oil-free Bushing Composition and Structure

  • Base Material (Bronze Alloy):
    • ASTM B271 C86300 (Manganese Bronze):
      • Used for bearings with an inner diameter (ID) greater than 180 mm.
    • ASTM B505 C86300 (Manganese Bronze):
      • Used for bearings with an inner diameter (ID) less than 180 mm.

Oil-Free Bush Key Features

  1. Self-Lubricating:
  2. Running-In Film:
    • The sliding surface is coated with a running-in film of 15 to 20 µm. This film ensures the transference of solid lubricant to the mating surface during initial operations, facilitating a smooth start-up and optimal performance from the onset.
  3. Solid Lubricant Inserts:
    • The graphite inserts are distributed according to the “macro distribution principle,” tailored to the specific type of movement (linear, rotational) the bearing will undergo. This pattern ensures efficient lubrication throughout the bearing’s life.

Oil-Free Bush, Mechanical Properties of Support Bronze Alloy (ASTM B271-C86300) Oil-Free Bearings

  • High Wear Resistance:
  • Corrosion Resistance:
    • The material is resistant to corrosion, suitable for use in harsh environments, including exposure to water, oil, and grease.
  • Static and Dynamic Load Capacity:
    • Designed to withstand both high static and dynamic loads, ensuring reliable performance under varying conditions.
  • Stable Coefficient of Friction:
    • Provides a consistent and stable coefficient of friction, reducing wear and enhancing the longevity of both the bearing and mating surfaces.
  • No “Stick-Slip” Effect:
    • Ensures smooth and continuous movement without the undesirable “stick-slip” effect, which can cause jerky or uneven motion.

Oil-Free Bush Applications

  1. Water Environments:
    • Suitable for use in marine applications, such as rudder bearings, propeller shafts, and underwater equipment.
  2. Oil and Grease Environments:
    • Ideal for automotive and industrial machinery, where components are frequently exposed to lubricants like oil and grease.
  3. Dry or Oil-Free Applications:
    • Also effective in applications where external lubrication is not feasible, relying on the self-lubricating properties of the solid lubricant inserts.
  4. Heavy-Duty Industrial Use:

Oil-Free Bushing Bearing

Self-lubricating cast bronze bushings with solid lubricant inserts provide a durable, maintenance-free solution for a variety of demanding applications. The use of high-quality bronze alloys (ASTM B271 C86300 and ASTM B505 C86300) ensures excellent mechanical properties, while the incorporation of graphite inserts guarantees long-lasting lubrication. These bushings are designed to perform reliably in water, oil, grease, and even dry conditions, making them versatile and highly effective for numerous industrial applications.

Oil-Free bush straight type or universal use in many dry applications such as die/mold, machinery, automation, construction, automobile. The Oil Free bush is self-lubrication and works without grease.

Bronze-graphite bushing: Bronze-graphite self-lubricating sliding bushings Spherical bronze-graphite bushings are formed from a bronze alloy with porosity up to 20-25% volume. The oil contained in the porosity allows for permanent lubrication of the space between the bearing and the shaft. Application advantages: the presence of oil reduces the possibility of scuffing; allows the bronze-graphite sleeve to remain operational for thousands of hours without wear; there is no need for lubrication; produces little noise. The products are used in electrical equipment, household appliances, used in printing machines, machine tools, etc. To order: it is possible to produce products according to the customer’s specifications. It is possible to buy bronze-graphite bushings on the company’s website.

Self-Lubricated Oilless Bushes Oil Free Bush Bronze Material

Material China
GB1776-87		 Standard Application situation
International
ISO 1338		 Japan USA Germany
500#SP CuZn25Al6FeMn3 CuZn25Al6FeMn3 H5102
CAC304		 B30-92
C86300		 DIN1709
G-CuZn25A/2.0598		 High load, low speed, general use
500#SP1 CuZn25Al6FeMn3 CuZn25Al6FeMn3 H3102
CAC304		 B30-92
C86300		 DIN1709
G-CuZn25A/2.0598		 High load, low speed, high load-bearing
500#SP5 CuZn25Al6FeMn3 CuZn25Al6FeMn3 H3102
CAC304		 B30-92
C86300		 DIN1709
G-CuZn25A/2.0598		 Ultra-high load, low speed, high load-bearing
– CuAl10Fe3 CuAl10Fe3 H5114
CAC703		 B30-92
95800		 DIN1714
GB-CuAl10NI/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

Product Features

1. Elimination of Oil Supply System

  • No need for oil supply devices, oil injection holes, or oil tanks.
  • Significant cost and time savings by eliminating expenses related to oil supply devices, processing, and assembly.

2. Reduced Operating Costs

  • Significantly lower consumption of lubricating oil.
  • Reduced equipment maintenance costs and elimination of risks due to insufficient oil supply.

3. Shorter Design Time

4. Environmental Benefits

  • No need for waste oil recycling, promoting environmental protection.
  • JDB (500#) self-lubricating oil-free bushings are versatile for mechanical applications, ensuring proper mechanical transmission without hair pulling under high load conditions.

5. Usage Precautions

  1. Opt for standard specifications when designing if possible.
  2. Ensure no foreign matter is present on the surface during assembly.
  3. Black or gray-black film on the sliding surface indicates solid lubricant—do not clean it off.
  4. Applying lubricant to wear parts before assembly can facilitate smoother operation.
  5. Press the assembly slowly to avoid damaging the bearing.
  6. Choose appropriate materials for different parts to enhance mechanical properties and extend bearing life.
  7. Use screws for high-load, reciprocating motion applications.
  8. For use in fresh or seawater environments, opt for stainless steel or chrome-plated grinding shafts.

Advantages of Solid Self-Lubricating Oil-Free Bushings

1. Oil Supply System Not Required

  • Saves labor and time in mechanical design by eliminating the need for oil supply devices.
  • Adaptable to various special conditions with customizable shapes for diverse applications.
  • Reduces costs associated with mechanical inspection, maintenance, and oil supply.

2. No Need for Additional Oil

  • Self-lubricating film forms due to the greater coefficient of linear expansion of the lubricant compared to the metal matrix.
  • Effective in situations where adding oil or grease is difficult, even under low-speed and high-load conditions.

3. Lower Usage Costs

  • Eliminates the need for frequent oil maintenance, reducing pollution and maintenance costs.
  • Achieves a clean environment and significant savings on lubricant costs.

4. Superior Performance Under High Load and Low Speed

  • Made from high-strength alloy brass with a special graphite formula for self-lubrication.
  • Combines the strengths of both materials to perform well even under high-load and low-speed conditions.

5. Excellent Wear Resistance in Challenging Conditions

  • The lubricant arrangement ensures availability throughout the grinding parts during operation.
  • Suitable for reciprocating, rocking, and frequent start-stop motions where oil film formation is challenging.

6. Superior Chemical and Corrosion Resistance

  • Made from wear-resistant materials like graphite, PTFE, and molybdenum disulfide.
  • The metal matrix can be selected for different chemical resistance, enhancing durability.

7. Competitive Product Cost

  • Longer working life and minimal maintenance compared to similar products.
  • Extended replacement cycles and superior performance.

Specifications for Graphite Plug Bronze Bush

  • Inner Diameter (ID): 50 mm
  • Outer Diameter (OD): 62 mm
  • Length: 50 mm

For inquiries or to request a specific size or catalog of oilless bearings, please contact us. Our manufacturing units are located in China, and we specialize in castings and machined components made of bronze.

Would you like more information about the applications, advantages, or mechanical properties calculations for this specific size of bushing?

oil-free bush

oil free bearing bushing catalog

Code d F7 D M6 L
OIL-FREE BUSHES 5 +0.022
+0.010		 9 +0.015
+0.006		 8 10 12 15
6 10 8 10 12 15 16 20
8 +0.028
+0.013		 12 +0.018
+0.007		 8 10 12 15 16 20 25
10 14 8 10 12 15 16 20 25 30
12 +0.034
+0.016		 18 8 10 12 15 16 20 25 30 35
13 19 +0.021
+0.008		 10 12 15 16 20 25 30 35
14 20 10 12 15 16 20 25 30 35
15 21 10 12 15 16 20 25 30 35 40
16 22 10 12 15 16 20 25 30 35 40
17 23 15 30 35
18 24 10 12 15 16 20 25 30 35 40
19 +0.041
+0.020		 26 15 20
20 28 10 12 15 16 20 25 30 35 40 50 60 70
30 16 20 25 30 35 40 50 60 70 100
22 32 +0.025
+0.009		 12 15 20 25
25 33 12 15 16 20 25 30 35 40 50 60
35 12 15 16 20 25 30 35 40 50 60 70 80
28 38 20 25 30 40
30 38 12 15 16 20 25 30 35 40 50 60 70 80
40 12 15 16 20 25 30 35 40 50 60
31.5 +0.050
+0.025		 40 30 40
32 42 20 30 40
35 44 20 25 30 35 40 50 60 70
45 20 25 30 35 40 50 60 70
38 48 30 40
40 50 15 20 25 30 35 40 50 60 70 80
55 +0.030
+0.011		 15 25 30 35 40 50 60
45 55 30 35 40 50 60
56 30 35 40 50 60 70 80
60 30 35 40 50 60 70 80
50 60 20 30 35 40 50 60 70 80
62 30 35 40 50 60 70 80
65 30 40 50 60 70 80 100
55 +0.060
+0.030		 70 40 50 60 70
60 74 30 35 40 50 60 70 80 100
75 30 35 40 50 60 70 80 100
63 75 60 70 80
65 80 40 50 60 70 80
70 85 +0.035
+0.013		 30 35 40 50 60 70 80 100
90 50 60 70 80 100
75 90 50 60 70 80 100
95 60 70 80 100
80 96 40 50 60 70 80 100 120
100 40 50 60 70 80 100 120 140
85 +0.071
+0.036		 100 60 80
90 110 30 50 60 70 80 90 100 120
100 120 50 60 70 80 100 120 140
110 130 +0.040
+0.015		 50 70 80 100 120
120 140 70 80 90 100 120 140
125 +0.083
+0.043		 145 100 120
130 150 80 100 130
140 160 100 140
150 170 80 100 150
160 180 80 100 150

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