Cold-Bent Stepped Hollow Shaft Sleeve

Product Overview

This product is a stepped hollow bushing (sleeve) machined as one piece from high-quality carbon steel. It consists of a narrow cylindrical section, a stepped shoulder and a wider cylindrical section, with a through hole in the center. The stepped structure provides axial positioning and location during assembly, while the central through hole allows shafts to pass through or serves as a lubrication or clearance channel, combining support and positioning functions. With a matte metallic finish and high machining accuracy and dimensional consistency on the inner and outer diameters, it is widely used for positioning, bushing and spacing applications in machinery and transmission and support structures.

 

Product Features

Stepped structure design: The multiple steps provide axial positioning and location during assembly and adapt to mounting positions with different fit dimensions for accurate, well-seated installation.

Central through hole: The hollow body with a central through hole allows shafts to pass through or serves as a lubrication or clearance channel, combining support and positioning functions.

Precision machining: Turned as one piece with high dimensional accuracy and smooth inner and outer surfaces, ensuring stable running and fitting with good assembly consistency.

High-quality carbon steel: Made of high-quality carbon steel with high strength and good wear resistance, providing strong load capacity for long-term use.

Reliable machining details: Relief grooves and a circumferential groove on the shoulder and cylindrical surfaces ensure machining accuracy and proper fitting during assembly; the specific function is subject to the actual design.

 

Application Field

This product is widely used in machinery, transmission and support structures, hydraulic and pneumatic components, automotive and engineering equipment as a positioning sleeve, bushing, spacer or connecting sleeve. It is especially suitable for assembly positions requiring axial positioning, wear-resistant support or the passage of shafts.

 

Instructions for use

Selection: Choose a bushing with suitable inner and outer diameters and step dimensions according to the shaft diameter, mounting hole size, assembly length and fit accuracy requirements, and check that the inner and outer surfaces, shoulder faces and hole edges are in good condition.

Cleaning and inspection: Clean the inner and outer surfaces before installation to remove burrs, oil and impurities, and confirm the through hole is clear with no dents or deformation.

Installation: Align the bushing with the mating position and press or tap it in with even force, making sure the shoulder face seats fully without tilting; use a proper pressing tool when necessary.

Inspection: After assembly, confirm the bushing is fully seated and the shaft fits smoothly; check for wear and loosening periodically during use.

 

Maintenance

Regular lubrication: Apply a suitable amount of grease to the moving mating surfaces regularly to reduce wear and keep running smooth.

Keep clean: Clean oil and dirt from the inner and outer surfaces and the through hole regularly to prevent impurities from entering the mating surfaces and causing wear.

Wear inspection: Check the bore, outer diameter and shoulder faces for wear and deformation regularly, and replace in time when the fit requirements are exceeded.

Rust-proof storage: Store carbon steel parts in a dry and ventilated place and apply anti-rust oil before long-term storage to prevent rusting.

 

FAQ

Q: What material is this bushing made of and how is it finished?

A: It is made of high-quality carbon steel with a matte machined finish. Heat treatment or surface anti-rust treatment can be provided on request; the specific material and process are subject to the product specification.

 

Q: What is the function of the stepped structure?

A: The stepped structure provides axial positioning and location during assembly and allows the bushing to fit mounting positions of different dimensions for accurate, well-seated installation.

 

Q: What is the function of the central through hole?

A: The central through hole allows shafts to pass through and can also serve as a lubrication or clearance channel, giving the bushing combined support, positioning and passage functions.

 

Q: How to select the right specification?

A: Choose the appropriate specification according to the shaft diameter, mounting hole size, assembly length and fit accuracy requirements. Provide your mating dimensions for sizing assistance.

 

Q: How to extend the service life of the bushing?

A: Apply grease regularly and keep the mating surfaces clean to prevent impurities from entering; check for wear periodically and replace in time when out of tolerance; apply anti-rust treatment to carbon steel parts.

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