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Home / Product / JDB Solid-lubricating Bearing / JDB-5 Steel-based Oilless Bushing, Graphite-inserted Steel Bushing
Wholesale JDB-5 Steel-based Oilless Bushing, Graphite-inserted Steel Bushing
JDB-5 Steel-based Oilless Bushing, Graphite-inserted Steel Bushing
  • JDB-5 Steel-based Oilless Bushing, Graphite-inserted Steel Bushing

JDB-5 Steel-based Oilless Bushing, Graphite-inserted Steel Bushing

Product Description:

JDB-5 is a high performance self-lubricating bearing. It features a strong steel back structure with an embedded solid lubricant layer to ensure wear resistance and long life even under high loads and harsh conditions. The bearing is maintenance-free and requires no external lubrication, making it suitable for use in industries such as construction, mining and heavy machinery.

Key Benefits:
Maintenance-free operation
High wear resistance and high load capacity
Energy-saving and cost-effective
Suitable for extreme conditions

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Steel-Based Graphite Inserted Oilless

Steel-based Oilless Bushing, Graphite-inserted Steel Bushing

Steel Substrate Graphite Inserted Oilless Operation
SB Steel Base
300 Max Temp °C
250 N/mm² Load
Steel-based Oilless Bushing
Product Overview

This steel-based oilless bushing features a high-strength steel substrate with graphite inserts distributed across the sliding surface. The steel backing provides exceptional load capacity up to 250 N/mm², making it suitable for heavy-duty applications where bronze bushings may not provide sufficient strength. Graphite plugs embedded in the steel surface deliver continuous maintenance-free lubrication without external oil or grease. The steel construction offers superior dimensional stability and resistance to deformation under high loads. Custom inner diameters, outer diameters, lengths, and graphite patterns available for specific application requirements.

Steel Substrate Strength High-strength steel backing provides exceptional load capacity up to 250 N/mm². Suitable for heavy-duty and high-impact applications.
Graphite Inserted Lubrication Graphite plugs embedded in the steel surface. Delivers continuous maintenance-free lubrication for demanding applications.
High Temperature Capability Steel substrate maintains structural integrity up to 300°C. Suitable for high temperature environments where bronze may soften.
Customizable Configuration Dimensions, graphite pattern, and tolerances adjustable to meet specific heavy-duty application requirements.
Core Advantages
  • Steel substrate provides superior load capacity up to 250 N/mm²
  • Graphite inserted design eliminates lubrication maintenance
  • Steel construction offers high dimensional stability under load
  • Resists deformation in heavy-duty and high-impact applications
  • Custom sizes and graphite patterns available for specific needs
Product Characteristics
  • Material: High-strength steel with graphite inserts
  • Substrate: Steel backing with machined graphite pockets
  • Graphite coverage: 18-22% on sliding surface
  • Bore tolerance: ISO H8 at 20°C reference
  • Operating temperature: -40°C to 300°C continuous
Application Scenarios
Heavy equipment pivot bearings Construction machinery bushings High load industrial gearboxes Mining equipment guide bearings Steel mill roller bearings Press tool heavy duty guide bushings Shipbuilding equipment bearings Custom heavy-duty bearing applications
Customization Available Steel-based oilless bushings can be customized for specific heavy-duty applications. Options include custom inner and outer diameters, overall length, graphite plug pattern, bore and outer diameter tolerances, and special steel grades. Engineering consultation available for non-standard configurations.
ID: 10-200mm OD: 16-250mm Length: Custom
Frequently Asked Questions

Steel-based bushings offer significantly higher load capacity (up to 250 N/mm²) compared to bronze. Steel provides better dimensional stability under heavy loads and higher temperature resistance (up to 300°C), making it suitable for more demanding applications.

Graphite inserts are mechanically retained in machined pockets within the steel surface. The pockets are precision-machined and the graphite plugs are pressed in, ensuring secure retention during operation.

Hardened steel shafts with 50-60 HRC and surface finish Ra 0.2-0.5 micrometers are recommended. Avoid soft shafts as they may wear prematurely against the steel substrate.

Press fit using a tool that contacts the bushing end uniformly. Housing bore should be within ISO H7 tolerance. Steel bushings require careful alignment during installation to prevent scoring of the graphite inserts.

Replace when bore diameter wear exceeds 0.10mm, when graphite on the sliding surface falls below 12% of original coverage, or when the bushing shows signs of deformation or cracking due to overload.

Type Steel-Based
Material Steel + Graphite
Lubrication Graphite Inserted
Max Load 250 N/mm²
Custom Available

dF7   d1m6 L -0.10
  -0.30
8  10  12  15  16  20  25  30  35  40  50  60  70  80 
8  +0.028
+0.013		 12  +0.018
+0.007		 ● ● ● ●
10  14  ● ● ● ● ●
12  +0.034
+0.016		 18  ● ● ● ● ● ● ●
13  19  +0.021
+0.008		 ● ● ●
14  20  ● ● ● ● ● ●
15  21  ● ● ● ● ● ● ●
16  22  ● ● ● ● ● ● ● ● ●
18  24  ● ● ● ● ● ● ● ●
20  +0.041
+0.020		 28  ● ● ● ● ● ● ● ● ● ●
22  32  +0.025
+0.009		 ● ● ● ●
25  33  ● ● ● ● ● ● ● ● ● ●
30  38  ● ● ● ● ● ● ● ● ●
35  +0.050
+0.025		 45  ● ● ● ● ● ● ●
40  50  ● ● ● ● ● ● ● ● ●
45  55  +0.030
+0.011		 ● ● ● ● ●
50  60  ● ● ● ● ● ● ●

JDB-5 is a reinforced product of the JDB series. It is based on steel GCr15 and embedded with solid lubricant. It is of high compress strength and particularly suitable for supporting positions in hosting machines, eg. The support or stand of the windlass and of the crane. However, it should not be applied in water or in acid/alkali circumstances. It can be used under low, middle, and high loads. Due to its superb high hardness, when under high load, it overperforms other JDB types. Not suitable for water, acid, or alkali circumstances. Most suitable for the supporting position of a hoisting machine,e.g. bulldozer supporter, hoister supporter, reeling machine supporter, etc.

Technical Data

Performance index Data
Bass Hardness HRC58-60 PV limit 2.5N/mm2.m/s
Friction coef (μ) <0.17 Dynamic load limit 250N/mm2
Temperature limit 350°C Speed limit 0.1m/s
Code Gcr15 Materials can be produced according to customer specifications.
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Zhejiang Shuangnuo Bearing Technology Co., Ltd.
Zhejiang Shuangnuo Bearing Technology Co., Ltd.
Zhejiang Shuangnuo Bearing Technology Co., Ltd. is China JDB-5 Steel-based Oilless Bushing, Graphite-inserted Steel Bushing Suppliers and Wholesale JDB-5 Steel-based Oilless Bushing, Graphite-inserted Steel Bushing Company, we are a manufacturer specializing in producing various self-lubricating copper alloy products using centrifugal casting, continuous casting, metal mold casting, and other processes. Its main products include brass, aluminum bronze, tin bronze, and others produced according to national standard grades. It processes and produces various solid inlaid self-lubricating bearing products on this basis . At the same time, it uses sintering technology to produce bimetallic products and many other types of products. Since its establishment nearly 10 years ago, the company has focused on the research development, and production of various new self-lubricating bearings.

In the process of product production, our company has always insisted on independent casting production of raw materials to ensure the quality of products from the source; during the casting process, the whole process is monitored, and the finished product is tested by spectrometer three times before, in and after the furnace to confirm the material composition of the product. The national testing agency is regularly commissioned to test the material composition and mechanical properties of the product, and authoritative test reports can be provided to customers in need; the company implements integrated production from material to finished product processing and has more than 80 sets of advanced CNC machine tools, CNC lathes, machining centers, and other major equipment. The strong production capacity ensures that the material production is organized for customers for the first time, shortening the production cycle.
  • 0+
    Establishment

    Founded in 2014, Shuangnuo has 10 years of experience in the industry.

  • 0+
    Advanced Equipment

    Strong production capacity ensures that we can organize material production for customers as soon as possible and shorten the production cycle.

  • 0+
    Happy Clients

    There are more than 5,000 cooperative customers around the world.

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