Ningbo Fenghua Bolong Machinery Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of special-shaped bushing in China. Please feel free to buy durable special-shaped bushing made in China here from our factory. All customized products are with high quality and competitive price.
Core Advantages
Complex Geometry Capability - Capable of producing multi-diameter steps, tapered bores, shoulder faces, locating flanges, cross-holes, and non-circular O.D. profiles. Components are engineered to match the exact cavity shape and load path of your application.
Integrated Feature Consolidation - Multiple functions can be combined into a single bushing component: mounting flange + bearing bore + locating pin + oil feed hole. This parts consolidation reduces assembly count, simplifies inventory, and eliminates tolerance stack-up between separate components.
Cold Heading Plus CNC Finishing - Cold heading provides the cylindrical body with excellent material utilization and work-hardened structure. CNC turning, milling, and drilling then add all non-cylindrical features in a single setup, ensuring accurate feature-to-feature positional relationships.
Multi-Axis CNC Machining - 5-axis and multi-spindle CNC machines enable machining of complex geometries with positional accuracy of ±0.01mm. Cross-holes, angled faces, slots, and locating pockets are machined in a single clamping operation to eliminate setup errors.
Material Versatility - Available in a wide range of materials: carbon steel, alloy steel, stainless steel, aluminum, brass, and bronze. Material selection is based on mechanical property requirements, corrosion resistance, and compatibility with mating components.
Non-Standard Design Freedom - Diameters from 3mm to 120mm; lengths from 3mm to 200mm; shapes including oval, rectangular, D-shaped, multi-lobed, or fully custom contoured. Do you need an elliptical locating feature on one end and a threaded mount on the other? We can produce it.
Full Feature Dimensional Verification - Each special-shaped bushing is verified on CMM equipment against customer-specified critical features. Complex profile validation uses optical or laser scanning for full-contour verification. All measured data is archived and linked to individual part traceability codes.
Technical Specifications
|
Parameter |
Details |
|
Product Name |
Special-Shaped Bushings - Custom-Engineered Non-Standard Components |
|
Materials |
Carbon steel, alloy steel, stainless steel, aluminum, brass, bronze |
|
Manufacturing Process |
Cold heading + CNC turning + multi-axis milling/drilling |
|
Size Range |
O.D. 3–120mm; Length 3–200mm (customizable) |
|
Tolerances |
Standard features ±0.02mm; special features ±0.01mm (per design) |
|
Complex Features |
Multi-diameter steps; cross-holes; slots; flanges; non-circular profiles |
|
Surface Treatment |
As per customer specifications |
|
Quality Systems |
IATF 16949 certified manufacturing |
Manufacturing Process
|
Stage |
Key Operations |
|
Material Prep |
Bar/coil cutting → slug preparation → pre-heat (if required) |
|
Cold Forming |
Multi-station cold heading → preliminary cylindrical form |
|
CNC Finishing |
Multi-axis CNC turning → milling → drilling → profiling |
|
Surface & Final |
Surface treatment → deburring → thread gauging (if applicable) |
Quality Control
Application Scenarios
Customized Shock Absorber Mounting Interfaces
Special-shaped bushings are used in shock absorber assemblies where the mounting interface geometry deviates from standard configurations - such as shock absorber lower brackets with locating flanges, or upper mounts with transverse lubrication holes. The non-circular profile or integrated flange feature prevents rotation within the mounting bore, eliminating the need for separate anti-rotation dowels while the flange face provides axial positioning.
Suspension Control Arm Non-Standard Mounting Bores
Some suspension control arms feature non-standard bushing mounting bore geometries - oval, D-shaped, or multi-lobed profiles. Special-shaped bushings are custom-machined to match the actual contour of the control arm bore, ensuring full contact with the bore wall after insertion with no rotation or axial play - maintaining suspension alignment precision.
Equalizing Beam Thrust Rod Connections
Thrust rod end connections in heavy-duty truck equalizing beam suspensions often employ non-circular cross-section bushing bores. Special-shaped bushings are custom-machined to match the actual thrust rod end contour, ensuring no relative rotation at the connection point under high-load, high-impact conditions - maintaining the定位 relationship between the axle and chassis frame.
Custom Services
Design engineering
Collaborative review of your application requirements, load conditions, and installation constraints to develop a bushing geometry that fits your cavity and solves your functional challenges
Full custom geometry
Multi-diameter, non-circular, flanged, grooved, cross-drilled, tapered - we produce to your drawing or conceptual sketch
Material selection
Carbon/alloy steel for high strength; stainless for corrosion; aluminum for weight; brass/bronze for low friction
Feature integration
Combine locating, sealing, threading, bearing, and oil feed functions into a single component to simplify your assembly and reduce part count
Prototype development
Rapid CNC machining for design validation prior to hard tooling commitment
Production scale
From pilot lots through high-volume production, with full PPAP documentation for automotive applications
Whether you need special shape metal bushings with complex contours for shock absorber mounting, CNC machined bushings with tight positional tolerances for suspension control arms, or non-standard bushings that simply cannot be produced by conventional methods - our engineering team is ready to turn your design concept into a production-ready component.
Contact Us for Your New Project
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