The Brass Precision Step Bushing is a high‑tolerance, multi‑stage cylindrical mechanical component widely used in precision automation equipment, motion transmission systems, positioning fixtures, instrumentation devices, and electromechanical assembly units. Featuring integrated stepped outer diameter and high‑precision inner hole structure, this brass precision step bushing is designed for accurate shaft positioning, gap reduction, wear resistance, stable rotation, and axial limit installation.
As a critical auxiliary transmission and positioning part, it effectively solves common mechanical problems such as shaft shaking, loose fit, rapid wear, noise generation, and positioning deviation caused by long‑term equipment operation. Thanks to excellent brass material properties and ultra‑precision turning process, the step bushing maintains stable mechanical performance under high‑speed rotation, frequent reciprocating movement, and continuous dynamic load conditions.
All dimensional accuracy, concentricity, surface roughness and fitting tolerance of the brass precision step bushing are manufactured in strict accordance with ISO 2768‑mk industrial precision standards. Standardized processing ensures outstanding consistency, interchangeability and assembly accuracy for mass production, making it ideal for high‑requirement precision mechanical matching scenarios.
Different from ordinary straight cylindrical bushings, the brass precision step bushing adopts a unique multi‑step outer circle design. The integrated stepped structure realizes dual functions of radial precise fitting and axial limiting positioning in one single component. The large‑diameter step surface acts as a limiting shoulder to control assembly depth and prevent axial displacement during operation, while the small‑diameter outer circle and inner hole provide precise clearance fit for rotating or sliding shafts. This one‑piece forming structure avoids assembly errors and loose gaps caused by combined installation of multiple separate parts.
Brass Precision Step Bushing
The inner hole of the brass precision step bushing is finely turned and polished to achieve ultra‑smooth surface finish, effectively reducing friction coefficient during shaft movement. It greatly lowers running resistance, suppresses mechanical noise, and improves the smoothness of high‑speed motion. Every chamfer, step transition and hole opening is fully deburred to ensure smooth assembly without scratching matching shafts or workers. The strict concentricity control between inner hole and outer circle guarantees no eccentric wear during long‑time rotation, significantly extending the service life of transmission and positioning components.
This brass precision step bushing is made of high‑quality brass alloy material, which has inherent excellent physical properties compared with aluminum and steel parts. Brass features high density, good self‑lubricating performance, low friction coefficient, outstanding wear resistance and strong anti‑oxidation ability. Unlike steel bushings that are prone to rust and need regular oil maintenance, brass materials can maintain stable working performance for a long time in dry, dusty and slightly humid workshop environments without easy corrosion or oxidation.
In addition, brass has excellent ductility and machinability, allowing ultra‑fine turning and precise size control. All key fitting dimensions of the step bushing are controlled within micron‑level tolerance ranges. The material will not deform easily under continuous friction and pressure, ensuring long‑term positioning stability and fitting accuracy. Its good shock absorption performance can effectively absorb tiny vibration generated during mechanical operation, improving the overall running smoothness of the equipment.
The brass precision step bushing adopts fine turning and natural surface finishing. No excessive surface coating is required, retaining the original metallic texture and natural self‑lubricating properties of brass. According to customer requirements, surface polishing, deburring bright treatment and anti‑oxidation protection oil treatment can be provided to further improve surface smoothness and anti‑tarnish performance. The finished bushing features precise size, smooth surface, no burrs, no deformation, and stable tolerance, fully meeting high‑precision assembly and high‑speed operation standards.
Widely applied in various precision mechanical fields, the brass precision step bushing is commonly used for shaft positioning, rotating support, limiting protection and gap adjustment in automation modules, testing instruments, small transmission mechanisms, robot auxiliary components, fixture positioning systems and precision electromechanical equipment. It effectively improves equipment operation accuracy, reduces mechanical failure rate, and lowers later maintenance costs.
We provide full non‑standard customization services for brass precision step bushings. According to customer 2D/3D drawings or technical parameters, we can customize different inner hole diameters, step outer diameters, step heights, overall lengths, groove positions, pin holes and special‑shaped limiting structures. Whether customers need small‑batch prototype samples for equipment debugging or large‑batch mass production parts for assembly lines, we can deliver high‑precision, high‑consistency brass step bushings with stable quality and fast delivery.
A: Brass features excellent self‑lubrication, wear resistance, anti‑oxidation and noise reduction performance, ideal for long‑term high‑speed precision motion scenarios.
A: We follow ISO 2768‑mk standard. Key fitting holes and step surfaces are controlled within ±0.02mm tolerance to ensure precise assembly.
A: Yes. Custom inner diameter, outer step size, length, grooves and special structures are fully supported based on your drawings.
A: Standard products adopt natural finishing. Anti‑oxidation treatment and mirror polishing are available upon request.
