self-lubricating bushes composite bearing material developed specifically to operate with marginal lubrication and consists of three bonded layers: a steel backing strip and a sintered porous bronze matrix, impregnated and overlaid with a pigmented acetal copolymer bearing material
JDB Bearings

JDB Bearings

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jdb jfb bronze bearings C95400 Aluminum Bronze Plugged Graphite highest tensile strength among cast brasses

The Metal-Based Embedded Solid Self-Lubricating Bearing: A Novel Lubrication Solution for Extreme Operating Conditions

In the industrial world, reliable and efficient lubrication is essential for ensuring the smooth operation of heavy machinery, particularly under harsh conditions. The Metal-Based Embedded Solid Self-Lubricating Bearing (JDB) is a groundbreaking solution that combines the robust characteristics of metal bearings with the advanced lubrication properties of self-lubricating bearings, offering enhanced performance and longevity for critical equipment in demanding environments.

What is a Metal-Based Embedded Solid Self-Lubricating Bearing?

A Metal-Based Embedded Solid Self-Lubricating Bearing is a novel type of bearing that integrates a metal substrate with a solid lubricant embedded in grooves or holes in the metal. The metal substrate primarily bears the load, while the solid lubricant material, made from a special formulation, provides the necessary lubrication. This bearing type is specifically designed for industrial and mining enterprises where machinery operates under extreme conditions, such as high temperature, dust, or corrosive gases.

Key Features of JDB Bearings

  1. High Load-Bearing Capacity: The metal substrate can withstand significant loads, making it ideal for heavy-duty applications.
  2. Impact Resistance: These bearings are capable of enduring impact forces, which is crucial in industries where sudden shocks or vibrations are common.
  3. High-Temperature Resistance: The solid lubricant embedded in the bearing can operate efficiently in environments with temperatures ranging from -40°C to +300°C.
  4. Self-Lubrication: One of the most notable features of these bearings is their ability to operate without the need for traditional oil or grease lubrication. The solid lubricant, embedded in the bearing, continuously transfers to the friction surface, creating a durable, lubricating film that minimizes wear and reduces the risk of damage.
  5. Corrosion and Chemical Resistance: JDB bearings are designed to resist corrosion and the effects of chemicals, making them suitable for use in industries such as chemical processing, food machinery, and paper manufacturing.
  6. Low Friction Coefficient: The unique composition of these bearings ensures a low coefficient of friction, which is essential for minimizing wear and improving the lifespan of the equipment.

Challenges in Traditional Lubrication and How JDB Bearings Address Them

Many industrial operations face extreme environmental conditions that make traditional lubrication methods (such as oil and grease) insufficient or ineffective. For instance, industries such as cement manufacturing, steel production, and petrochemicals often deal with high temperatures, dust, acidic gases (such as CO2, SO2), and heavy machinery. In such environments, bearings and other frictional components are prone to severe wear, seizure, or even failure due to inadequate lubrication.

Although traditional oil and grease lubrication systems are still commonly used, these methods often fail under these extreme conditions, leading to severe damage and downtime. This not only impacts productivity but also requires significant maintenance efforts, spare parts, and energy consumption.

JDB bearings, on the other hand, offer a solution to these challenges by providing long-lasting lubrication without the need for regular oil or grease applications. The solid lubricant within the bearing reduces friction and wear, making it perfect for applications in which traditional lubrication systems are not effective or feasible.

Applications of JDB Bearings

  1. Heavy Load, Low-Speed Applications: These bearings are perfect for situations where heavy loads and low speeds are combined, such as in dam gate bearings, accident door bearings, and hydro-turbine bearings.
  2. High-Temperature Environments: JDB bearings are highly suitable for steel mills, metallurgy equipment, rolling mills, conveyor rollers, and high-temperature blast furnaces, where traditional lubrication systems may fail.
  3. Automotive Industry: These bearings are also used in automotive manufacturing for covering press molds, assembly lines, and conveyor belts.
  4. Industrial and Chemical Applications: They are ideal for use in chemical, food, paper, and textile machinery, where resistance to corrosion and water is essential.
  5. Other Heavy-Duty and Precision Applications: JDB bearings are also used in engineering machinery, injection molding machines, and high-precision molds that require lubrication in harsh conditions.

Conclusion: The Future of Lubrication Technology

The Metal-Based Embedded Solid Self-Lubricating Bearing (JDB) offers a modern and reliable solution for industries operating under extreme conditions. Its ability to function effectively without oil or grease, combined with its high load-bearing capacity, temperature resistance, and low friction properties, make it an ideal choice for applications in various sectors, including automotive, steel, chemical, and mining.

By utilizing JDB bearings, companies can reduce downtime, lower maintenance costs, and improve the reliability of their equipment. As industrial demands evolve, the adoption of such advanced bearing technologies will be crucial to enhancing productivity and sustainability in modern manufacturing processes.

If you’re looking to enhance the performance of your machinery in challenging environments, consider switching to JDB bearings for a more efficient, cost-effective, and long-lasting solution.

TYPE OF MATERIAL: METAL BASE

Material Correspondence Table

Code China GB1176-87 International ISO 1338 Germany DIN Japan JIS U.S. ASTM(UNS) U.K. BS France NF Applicable
JDB650 ZCuZn25Al6Fe3Mn3 GCuZn25Al6Fe3Mn3 DIN1709 G-CuZn25Al5 H5102 CAC304 B30-92 C86300 HTB2 – High load, low speed, general use
JDB650 S1 ZCuZn25Al6Fe3Mn3 GCuZn25Al6Fe3Mn3 DIN1709 G-CuZn25Al5 H5102 CAC304 B30-92 C86300 HTB2 – Ultra high load, low speed, high load
JDB650 S2 ZCuSn5Pb5Zn5 GCuPb5Sn5Zn5 DIN1705 G-CuSn5ZnPb H5111 BC6 B30-92 C83600 LG2 CuPb5Sn5Zn5 Medium load, low speed
JDB650 S3 ZCuAl9Fe4Ni4Mn2 GCuAl10FeNi5 DIN17656 G-CuAl10Ni H5114 AlBC3 B30-92 C95500 AB2 CuAl10Fe5Ni5 Medium load, medium speed, general use
JDB(HT250) HT250 – FC250 ASTM Class40 – – – Medium load, low speed

Base Material for Self-lubricating Bearings

Code Material Grade Density Hardness HB Tensile Strength N/mm² Elongation % Coefficient of Linear Expansion 10⁻⁵/°C Operating Temperature °C Max Dynamic Load N/mm² Max Line Speed m/min (Dry) Max PV N/mm² *m/min Compression Set 300N/mm²
JDB650 CuZn25Al6Fe3Mn3 8.0 >210 >750 >12 1.9 -40~+300 100 15 200 <0.01
JDB650 S1 CuZn25Al6Fe3Mn3 8.0 >250 >800 >8 1.9 -40~+150 120 15 200 <0.005
JDB650 S2 CuAl9Fe4Ni4Mn2 8.5 >150 >800 >15 1.9 -40~+400 150 20 60 <0.04
JDB650 S3 CuSn5Pb5Zn5 8.9 >70 >200 >10 1.8 -40~+400 60 10 60 <0.05
JDB650 S4 CuSn12 9.05 >80 >260 >8 1.8 -40~+400 70 10 80 <0.005
JDB (HT250) HT250 7.0 >190 >250 >5 1.0 -40~+400 90 8 40 <0.015
JDB (Gcr15) Gcr15 7.8 HRC>58 >1500 >15 1.1 -40~+400 200 5 150 <0.002

Solid Lubricant

Solid Lubricant Characteristic Typical Use
SL1 High Purity Graphite + Additives Good wear resistance and chemical stability, Operating temperature <400°C Applied to general machinery, used in the atmosphere
SL4 PTFE + Additive Very low friction coefficient and good water wettability, Operating temperature <300°C

Used in water and seawater lubrication, such as ships, hydraulic arc doors, hydraulic turbines, pharmaceutical and beverage machinery

 

JDB Series – Main Technical Specifications

Model JDB-1 JDB-2 JDB-3 JDB-4 JDB-5
Base Material CuZn24Al6 CuSn6Zn6Pb3 Steel + CuSn6Zn6Pb3 HT-250 Cast Iron CuCr15
Base Hardness (HB) 230–270 90 80 210 60
Coefficient of Friction ≤0.16 ≤0.15 ≤0.14 ≤0.17 ≤0.17
Max. Operating Temperature (°C) 300 350 300 400 350
Max. Dynamic Load (N/mm²) 100 60 70 60 250
Max. Static Load (N/mm²) 25 15 20 15 70
Max. Sliding Speed Dry: 0.40 m/s
Oil: 5.0 m/s		 2.0 m/s 2.0 m/s 0.5 m/s 0.1 m/s
Max. PV Value (N/mm²·m/s) 3.8 0.5 0.6 0.8 2.5

JDB Wear Performance

Test Pressure (N/mm²) 62 24.5 14.7
Test Item Wear (mm) Time (hrs) Wear (mm)
Model Lubrication Condition 62 N/mm² 24.5 N/mm² 14.7 N/mm²
Copper Bushing Oil Lubricated 0.098 mm / 10 hrs 0.125 mm / 100 hrs 0.10 mm / 100 hrs
JDB-1 Dry Friction 0.075 mm / 100 hrs 0.015 mm / 100 hrs 0.012 mm / 100 hrs
JDB-2 Dry Friction 0.025 mm / 30 hrs 0.065 mm / 100 hrs 0.025 mm / 100 hrs
JDB-3 Dry Friction 0.030 mm / 30 hrs 0.120 mm / 100 hrs 0.015 mm / 100 hrs
JDB-4 Dry Friction 0.030 mm / 10 hrs 0.250 mm / 20 hrs 0.011 mm / 100 hrs
JDB-5 Dry Friction 0.022 mm / 100 hrs 0.130 mm / 100 hrs 0.010 mm / 100 hrs

JSB BUSHING SIZE

d D IDF7 ODm6

L-0.10

-0.30

 
8 10 12 15 16 20 25 30 35 40 50 60 70 80
8 12 8 +0.028
+0.013		 12 +0.018
+0.007		 081208 081210 081212 081215                    
10 14 10 14 101408 101410 101412 101415   101420                
12 18 12 +0.034
+0.008		 18   121810 121812 121815 121816 121820 121825 121830            
13 19 13 19 +0.021
+0.008		   131910   131915 131916                  
14 20 14 20   142010 142012 142015   142020 142025 142030            
15 21 15 21   152110 152112 152115 152116 152120 152125 152130            
16 22 16 22   162210 162212 162215 162216 162220 162225 162230 162235 162240        
18 24 18 24     182412 182415 182416 182420 182425 182430 182435 182440        
20 28 20 +0.041
+0.020		 28   202810 202812 202815 202816 202820 202825 202830 202835 202840 202850      
22 32 22 32 +0.025
+0.009		     223212 223215   223220 223225              
25 33 25 33     253312 253315 253316 253320 253325 253330 253335 253340 253350 253360    
30 38 30 38     303812 303815   303820 303825 303830 303835 303840 303850 303860    
35 45 35 +0.050
+0.025		 45           354520 354525 354530 354535 354540 354550 354560    
40 50 40 50           405020 405025 405030 405035 405040 405050 405060 405070 405080
45 55 45 55 +0.030
+0.011		               455530 455535 455540 455550 455560    
50 60 50 60               506030 506035 506040 506050 506060 506070 506080
d D IDF7 ODm6

L-0.10

-0.30

 
30 35 40 50 60 70 80 100 120 130 140 150
50 62 50 +0.050
   +0.025		 62 +0.030
   +0.011		 506230 506235 506240 506250 506260 506270            
50 65 50 65 206530   506540 506550 506560 506570 506580 5065100        
55 70 55 +0.060
   +0.030		 70     557040 557050 557060 557070            
60 74 60 74 607430 607435 607440 607450 607460 607470 607480          
60 75 60 75 607530 607535 607540 607550 607560 607570 607580 6075100        
63 75 63 75         637560 637570 637580          
65 80 65 80       658050 658060 658070 658080          
70 85 70 85 +0.035
   +0.013		   708535 708540 708550 708560 708570 708580 7085100        
70 90 70 90       709050 709060 709070 709080          
75 90 75 90         759060 759070 759080 7590100        
75 95 75 95         759560 759570 759580 7595100        
80 96 80 96     809640 809650 809660 809670 809680 8096100 8096120      
80 100 80 +0.071
   +0.036		 100     8010040 8010050 8010060 8010070 8010080 80100100 80100120   80100140  
90 110 90 110       9011050 9011060 9011070 9011080 90110100 90110120      
100 120 100 120         10012060 10012070 10012080 100120100 100120120   100120140  
110 130 110 130 +0.040
   +0.015		             11013080 110130100 110130120      
120 140 120 140             12014080 120140100 120140120   120140140  
125 145 125 +0.083
   +0.043		 145               125145100 125145120      
130 150 130 150               130150100   130150130    
140 160 140 160               140160100     140160140  
150 170 150 170               150170100       150160140
160 180 160 180               160180100       160180150
 

JDB Solid Lubricating Bearing Dimensions & Weight Table

JDB Series Graphite Plugged Self-Lubricating Bearings

The JDB series graphite plugged self-lubricating bearings are manufactured using a high-strength copper alloy matrix, uniformly embedded with high-temperature resistant solid graphite lubricants. This product line belongs to the maintenance-free, oil-free sliding bearing solutions developed by Jiashan Gurun Bearing Co., Ltd.

Key Performance Characteristics

  • High load capacity under low-speed conditions
  • Excellent wear resistance and corrosion resistance
  • Stable operation without external lubrication
  • Reliable performance in boundary and dry friction regimes

These bearings are specifically engineered for applications where a stable hydrodynamic oil film is difficult to establish, including:

  • Reciprocating motion
  • Oscillating movement
  • Frequent start-stop cycles

Typical Application Industries

  • Construction machinery
  • Metallurgical equipment
  • Hydraulic systems
  • Water conservancy machinery
  • Mold and die systems

Customization Capabilities

In addition to standard sizes, Jiashan Gurun Bearing Co., Ltd. offers:

  • Non-standard dimensions (custom ID/OD/length)
  • Special material configurations (e.g., CuZnAl, CuSn alloys)
  • Extended length bushings
  • Flanged or stepped designs

These options are developed to meet specific operating conditions and OEM integration requirements.

Technical Specification Notes

  • Units
    • Inner Diameter (d): mm
    • Outer Diameter (D): mm
    • Width (B): mm
    • Unit Weight: kg
  • Tolerance System
    • Inner Diameter: F7
    • Outer Diameter: m6
  • Design Standard
    • Applicable to copper-based graphite plugged self-lubricating bearing standard sizes

Engineering Insight (Practical Consideration)

In real-world applications, the performance of graphite plugged bearings depends heavily on:

  • Graphite distribution density and pattern
  • Matrix alloy composition (affecting PV value and thermal conductivity)
  • Surface finish of mating shaft (Ra typically ≤ 0.8 μm recommended)

If your application involves high PV values or mixed lubrication regimes, it is advisable to validate:

  • Load-speed envelope
  • Operating temperature range
  • Shaft hardness compatibility (typically ≥ HRC 50 for optimal wear pairing)
Model Inner Diameter (d, mm) Outer Diameter (D, mm) Width (B, mm) Unit estimate Weight (kg)
JDB081208 8 12 8 0.012
JDB081210 8 12 10 0.015
JDB081212 8 12 12 0.018
JDB081215 8 12 15 0.022
JDB101410 10 14 10 0.020
JDB101412 10 14 12 0.024
JDB101415 10 14 15 0.030
JDB101420 10 14 20 0.040
JDB121812 12 18 12 0.042
JDB121815 12 18 15 0.052
JDB121820 12 18 20 0.070
JDB121825 12 18 25 0.087
JDB162215 16 22 15 0.075
JDB162220 16 22 20 0.099
JDB162225 16 22 25 0.124
JDB162230 16 22 30 0.149
JDB202820 20 28 20 0.156
JDB202825 20 28 25 0.195
JDB202830 20 28 30 0.234
JDB202840 20 28 40 0.312
JDB253320 25 33 20 0.248
JDB253325 25 33 25 0.310
JDB253330 25 33 30 0.372
JDB253340 25 33 40 0.496
JDB303825 30 38 25 0.395
JDB303830 30 38 30 0.474
JDB303840 30 38 40 0.632
JDB303850 30 38 50 0.790
JDB354530 35 45 30 0.710
JDB354540 35 45 40 0.947
JDB354550 35 45 50 1.184
JDB405030 40 50 30 0.848
JDB405040 40 50 40 1.131
JDB405050 40 50 50 1.413
JDB405060 40 50 60 1.696
JDB455540 45 55 40 1.380
JDB455550 45 55 50 1.725
JDB455560 45 55 60 2.070
JDB506040 50 60 40 1.650
JDB506050 50 60 50 2.063
JDB506060 50 60 60 2.475
JDB506080 50 60 80 3.300
JDB607540 60 75 40 2.420
JDB607550 60 75 50 3.025
JDB607560 60 75 60 3.630
JDB607580 60 75 80 4.840
JDB708550 70 85 50 3.860
JDB708560 70 85 60 4.632
JDB708580 70 85 80 6.176
JDB8010050 80 100 50 5.420
JDB8010060 80 100 60 6.504
JDB8010080 80 100 80 8.672
JDB80100100 80 100 100 10.840
JDB10012080 100 120 80 10.750
JDB100120100 100 120 100 13.440
JDB100120120 100 120 120 16.130

Notes (for technical clarity & SEO context)

  • d (Inner Diameter): Shaft interface dimension
  • D (Outer Diameter): Housing fit dimension
  • B (Width): Bearing length / axial thickness
  • Unit Weight: Approximate mass per piece (for logistics and cost estimation)

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