JGB Oilless Guided Ejection Bushing – oilless bearings size

Discover the precision and durability of JGB Oilless Guided Ejection Bushings—premium self-lubricating bronze bearings engineered for reliable, maintenance-free performance. Available in a range of standard metric sizes, these bushings feature solid bronze construction with graphite plugs for enhanced wear resistance and low friction. Ideal for high-load applications, JGB bushings offer consistent operation without external lubrication. View our comprehensive size chart to find the right fit for your project, with nominal diameters tailored for precision and longevity in industrial environments. Choose JGB for dependable, oilless guide bushings built to perform.

JGB Oilless Guided Ejection Bushing

Understanding JGB Oilless Guided Ejection Bushings and Standard Bearing Sizes

For precision applications requiring robust, self-lubricating performance, JGB Oilless Guided Ejection Bushings are an ideal solution. Designed with durability and efficiency in mind, these bushings incorporate graphite for low-friction, self-lubricating functionality, which reduces wear and maintenance in high-performance settings. Available in a variety of standard bearing sizes, these components are well-suited for industrial applications where reliability and precision are key.

Key Characteristics of JGB Oilless Guided Ejection Bushings

Standard Bearing Sizes
JGB Oilless Guided Ejection Bushings are manufactured to precise standards, allowing for ease of installation across a range of setups. Key examples include:

  • Outer Diameter / Length: Ø190 u8 / 150 mm, which indicates an outer diameter of 190 mm and a length of 150 mm.
  • Inner Diameter / Length: Ø50 j7 / 260 mm, reflecting an inner diameter of 50 mm and a length of 260 mm.

These standardized dimensions allow for reliable compatibility and easy integration into existing systems, making them a versatile choice for engineers and industrial designers.

Material and Self-Lubricating Properties
Constructed from a high-quality bronze alloy with embedded graphite, JGB bushings offer a self-lubricating advantage that eliminates the need for external lubrication. The material composition provides a low friction coefficient between 0.05 – 0.12, which helps reduce wear and extends the lifespan of the bushing. The self-lubricating capability is achieved through a 25-30% graphite plug composition, ensuring smooth operation and minimized friction without constant maintenance.

Hardness and Wear Resistance
With a hardness rating between 190-220 HB, these bushings are highly resistant to wear. This range of hardness is ideal for applications where heavy loads are common, ensuring that the bushing can withstand considerable pressure and reduce downtime from component wear.

JGB Oilless Guided Bushings Technical Specifications

The JGB Oilless Guided Ejection Bushings’ technical specifications underscore their suitability for challenging environments:

  • Base Alloy: CuZn25Al6FeMn3, a bronze alloy with a high level of durability and mechanical resilience.
  • Density: 8.0 g/cm³, indicating structural integrity and resistance to deformation.
  • Tensile Strength (Rm): 750 N/mm², providing strong resistance to tensile stress.
  • Yield Strength: 450 N/mm², allowing the bushing to endure high loads without permanent deformation.
  • Elongation (A5): 5-8%, a balance between strength and flexibility.
  • Friction Coefficient: 0.05 – 0.12, providing minimal friction for smooth operation.
  • Maximum Speed: 15 m/min, suitable for slow to medium-speed applications.
  • Thermal Conductivity: 50 W/m x K, which aids in thermal management during operation.
  • Thermal Expansion Coefficient: 18 x 10⁻⁶, ensuring stability even with temperature fluctuations.
  • Conductivity: 7-8 m/(Ω x mm²), which, while secondary, reflects the material’s conductive properties.
  • Temperature Range: Short-term maximum temperature up to approximately 200°C, allowing performance in variable temperature conditions.

JGB Oilless Ejection Guide Bushes Applications

JGB Oilless Guided Ejection Bushings excel in high-demand industries due to their durability, low maintenance requirements, and high load capacity. Typical applications include:

  • Metal Processing and Rolling Mills
  • Mining and Heavy Equipment
  • Marine Engineering

Advantages of JGB Oilless Guided Ejection Bushings

These bushings stand out in the industry for their reduced friction, self-lubricating capabilities, and high wear resistance. By minimizing maintenance needs and extending equipment life, JGB bushings provide an effective solution for operations where downtime is costly, and continuous performance is essential.

JGB Oilless Guided Ejection Bushings offer a reliable and efficient choice for industrial applications. With their standard bearing sizes, durable bronze composition, and self-lubricating graphite, these bushings help streamline operations by reducing friction and maintenance needs. Their versatility, technical strength, and high-performance characteristics make them ideal for environments where load-bearing capacity and durability are paramount.

JGB Oilless Ejector Guide Bearings
unit:mm
Standard No. d L d G6 D m6 L1 E Standard No. d L d G6 D m6 L1 E
JGB-12×9 12 9 12 +0.017
+0.006		 18 +0.018
+0.007		 9 4 JGB-35×29 35 29 35 +0.025
+0.009		 48 +0.025
+0.009		 29 8
JGB-12×14 14 14 JGB-35×39 34 34
JGB-12×19 19 19 JGB-35×39 39 39
JGB-12×24 24 24 JGB-35×49 49 49
JGB-16×14 16 14 16 25 +0.021
+0.008		 14 6 JGB-35×59 59 59
JGB-16×19 19 19 JGB-35×69 69 69
JGB-16×24 24 24 JGB-35×79 79 70
JGB-16×29 29 29 JGB-40×39 40 39 40 55 +0.030
+0.011		 39 10
JGB-16×34 34 34 JGB-40×49 49 49
JGB-16×39 39 35 JGB-40×59 59 59
JGB-20×14 20 14 20 +0.020
+0.007		 30 14 JGB-40×69 69 69
JGB-20×19 19 19 JGB-40×79 79 79
JGB-20×24 24 24 JGB-40×89 89 80
JGB-20×29 29 29 JGB-50×49 50 49 50 70 49
JGB-20×34 34 34 JGB-50×59 59 59
JGB-20×39 39 39 JGB-50×69 69 69
JGB-20×49 49 40 JGB-50×79 79 79
JGB-25×24 25 24 25 35 +0.025
+0.009		 24 JGB-50×89 89 89
JGB-25×29 29 29 JGB-50×99 99 90
JGB-25×34 34 34 JGB-60×59 60 59 60 +0.029
+0.010		 80 59
JGB-25×39 39 39 JGB-60×69 69 69
JGB-25×49 49 49 JGB-60×79 79 79
JGB-25×59 59 50 JGB-60×89 89 89
JGB-30×29 30 29 30 42 29 JGB-60×99 99 90
JGB-30×34 34 34 JGB-60×109 109 90
JGB-30×39 39 39 JGB-80×69 80 69 80 100 +0.035
+0.013		 69
JGB-30×49 49 49 JGB-80×79 79 79
JGB-30×59 59 59 JGB-80×89 89 89
JGB-30×69 69 60 JGB-80×99 99 99
JGB-30×79 79 60 JGB-80×109 109 100
JGB-80×119 119 100