Bronze bushings (or copper alloy bushings) are widely used in machinery, industrial equipment, ships, automobiles and other fields. They are often used in sliding bearings, bearing bushings, support structures and other locations. The specifications and sizes of bronze bushings vary depending on application requirements, material properties, load requirements and manufacturing standards. The following are the common specifications and size ranges of general bronze bushings:
1. Common specifications and size ranges
The specifications of bronze bushings mainly include outer diameter, inner diameter and length (or thickness). In specific applications, the specifications and sizes of bushings need to be selected according to equipment design requirements and working conditions.
(1) Outer diameter (D)
The outer diameter usually ranges from 20mm to 500mm. Depending on the size requirements of the equipment used, a larger outer diameter can be used.
Common specifications include: 20mm, 40mm, 60mm, 100mm, 150mm, 200mm, 300mm, 400mm.
(2) Inner diameter (d)
The inner diameter refers to the size of the bushing inside the shaft, which is usually smaller than the outer diameter to ensure that the clearance with the shaft is appropriate.
Common sizes of inner diameter: 10mm, 20mm, 40mm, 60mm, 100mm, 150mm, 200mm, 250mm.
(3) Length or thickness (L or H)
The length is generally between 20mm and 200mm, and is adjusted according to the requirements of the equipment.
Common length sizes: 20mm, 50mm, 100mm, 150mm, 200mm.
(4) Wall thickness (t)
The wall thickness of the bronze bushing is usually related to the inner diameter and outer diameter. Common wall thickness specifications are: 2mm, 4mm, 6mm, 8mm, 10mm.
2. Common size standards
The size of bronze bushings usually follows certain standards, such as GB (Chinese standard), DIN (German standard), ISO (international standard), etc. Here are some common standards and size examples:
(1) GB/T 1231-2003 - Copper alloy casting bushings
This standard specifies the size and design of bronze bushings and is applicable to general mechanical equipment.
For example: inner diameter 20mm, outer diameter 40mm, length 50mm.
(2) DIN 1850 - Copper alloy bushings
This standard applies to sliding bearing bushings in mechanical equipment, with sizes ranging from inner diameter 10mm to 500mm and wall thickness between 2mm and 12mm.
(3) ISO 3547 - Sliding bearings and bushings
This standard applies to the design and size of sliding bearings and bushings. Common sizes include inner diameter 20mm, 50mm, 100mm, 150mm, etc.
3. Common bushing types and sizes
Depending on different design requirements, bronze bushings can be of different types. Common bushing types and sizes are as follows:
(1) Ordinary round bronze bushing
Inner diameter: 10mm to 500mm
Outer diameter: Corresponding to the inner diameter, common ones are 20mm, 40mm, 60mm, 100mm, 150mm, etc.
Length: Usually from 20mm to 200mm
(2) Flange-type bronze bushing
The flange-type bushing is designed with a protruding ring (flange) part for easy installation and sealing.
Inner diameter: 20mm to 300mm
Outer diameter: Usually greater than 1.5 times the inner diameter
Flange thickness: Usually 3mm to 10mm
(3) Semi-open bronze bushing
The semi-open bushing is designed to be half open, suitable for occasions where it is not convenient to completely disassemble.
Inner diameter: 10mm to 100mm
Outer diameter: related to the inner diameter, usually with a small difference.
4. Special requirements and customization
If the standard size is not suitable for specific needs, the size of the bronze bushing can be customized according to the design requirements. When customizing, factors such as the load requirements of the equipment, the working environment (such as temperature, humidity, corrosiveness), and lubrication conditions need to be considered.
5. Common material specifications
The materials commonly used for bronze bushings are:
Aluminum bronze (such as CuAl10Fe5Ni5): suitable for high load and high wear resistance environments.
Tin bronze (such as CuSn6Zn3): suitable for corrosion resistance and low friction and wear environments.
Lead bronze (such as CuPb10Sn10): suitable for self-lubricating environments with low friction coefficient.
6. Reference table
The following are some common size references for bronze bushings:
Inner diameter (d) Outer diameter (D) Length (L) Wall thickness (t)
20 mm 40 mm 50 mm 10 mm
40 mm 60 mm 80 mm 10 mm
100 mm 120 mm 100 mm 10 mm
150 mm 170 mm 150 mm 10 mm
200 mm 250 mm 200 mm 10 mm
Summary:
The specifications and sizes of bronze bushings vary depending on the application scenario. Common inner diameter, outer diameter, length, and wall thickness are within a certain range, and the appropriate size can be selected according to the needs. In actual applications, the size of the bronze bushing needs to be determined based on the equipment design requirements and load conditions, and can be customized if necessary.
