Ningbo Fenghua Bolong Machinery Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of standard bushing in China. Please feel free to buy durable standard bushing made in China here from our factory. All customized products are with high quality and competitive price.
Core Advantages
Precision Cold Extrusion Process - Cold extrusion produces near-net shape bushings with excellent material utilization and consistent dimensional accuracy. The process work-hardens the material during forming, increasing surface hardness and wear resistance without requiring subsequent heat treatment for many applications.
Shock Absorber System Integration - The bushing inner tube mates with the mounting bolt, while the outer tube fits the bracket bore - providing precise radial and axial positioning. In MacPherson strut and double-wishbone suspensions, bushings deliver vibration isolation and noise reduction through the rubber layer between inner and outer tubes, absorbing high-frequency road-induced vibrations.
Corrosion-Resistant Material Options - Available in steel grades with zinc plating, phosphating, Dacromet, or e-coat finishes. For severe-service applications, stainless steel or aluminum alloy options provide extended service life in high-humidity or chemical-exposure environments.
High-Strength Steel Construction - Manufactured from high-strength low-alloy (HSLA) or carbon steel grades selected for yield strength, hardness, and fatigue resistance. Material selection is tailored to bushing diameter, wall thickness, and dynamic load expectations.
Economical High-Volume Production - Cold heading and cold extrusion lines support production rates exceeding 200 pieces per minute on multi-station formers. Annual capacities reach tens of millions of pieces, making these bushings suitable for OE volume requirements at competitive unit costs.
Bore Surface Integrity - The cold forming process produces smooth bore surfaces with controlled roughness and concentricity. Secondary reaming or burnishing operations are available for applications requiring tight diametral tolerances or specific surface finishes.
Full Dimensional Traceability - SPC data is maintained for O.D., I.D., length, and concentricity on each production lot. CMM verification is performed on sampling intervals to validate compliance with drawing specifications.
Technical Specifications
|
Parameter |
Details |
|
Product Name |
Standard Bushings - Precision Cold Extruded Cylindrical Components |
|
Materials |
Carbon steel, HSLA steel, stainless steel, aluminum alloy |
|
Manufacturing Process |
Cold extrusion, cold heading, secondary machining (reaming, burnishing) |
|
Size Range |
O.D. 5–100mm; I.D. 3–80mm; Length 3–120mm (customizable) |
|
Tolerances |
O.D. ±0.05mm; I.D. +0.03/-0.00; Length ±0.15mm (process-dependent) |
|
Surface Treatment |
Zinc plating, phosphating, Dacromet, e-coat, oiled |
|
Hardness Range |
As-extruded: 150–250 HV; case-hardened: 500–700 HV (optional) |
|
Quality Systems |
IATF 16949 certified manufacturing |
Manufacturing Process
|
Stage |
Key Operations |
|
Material Prep |
Coil feeding → cutting to slug length → annealing (if required) |
|
Cold Forming |
Multi-station cold former → extrusion → heading → piercing |
|
Secondary Ops |
Reaming (optional); burnishing (optional); O.D. turning (if required) |
|
Surface & Final |
Phosphating/plating/coating → oiling → packaging |
Quality Control
Application Scenarios
Chassis Shock Absorber Systems - Standard bushings are installed at the connection points between shock absorbers and the body, subframe, or suspension control arms - located within the bushing bore of the upper and lower shock absorber mounting brackets. They provide precise fitment and axial positioning for mounting bolts or pins. In MacPherson strut and double-wishbone suspensions, bushings deliver vibration isolation and noise reduction through the rubber layer between inner and outer tubes, absorbing high-frequency road-induced vibrations.
Heavy-Duty Commercial Vehicle & Construction Equipment Shock Absorbers - Shock absorber bushings for heavy-duty trucks, buses, and construction equipment must withstand higher loads and more severe operating environments. High-strength steel or corrosion-protected bushings maintain dimensional stability and wear resistance under high-load, high-impact conditions - ensuring reliable long-term shock absorber performance.
Custom Services
Design consultation
Engineering evaluation based on shock absorber mounting configuration, load conditions, and package constraints - recommending dimensions and material grades
Custom sizing
O.D., I.D., length, and wall thickness to your drawing specifications
Material selection
Carbon steel for general use; HSLA for high-strength; stainless or aluminum for corrosion resistance
Surface finish to your spec
zinc plating, phosphating, Dacromet, e-coat, or oiled per your OE standard
Sample validation support
Prototype quantities for fitment testing and durability trials
Volume production
From pilot batches to tens of millions annually - stable, on-time delivery
Whether you need standard bushings for chassis shock absorber systems, high-strength bushings for heavy-duty shock absorbers, or corrosion-protected bushings for severe-service environments - our engineering team supports your project from design through sampling and mass production.
Contact Us for Your New Project
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