Precision Machined Steel Shoulder Bushing
This precision machined steel shoulder bushing is designed for applications requiring accurate axial positioning, stable concentricity, and consistent mechanical performance. Manufactured from 303 CRES per MIL-S-7720, the component provides excellent machinability, reliable corrosion resistance, and dimensional stability for industrial assemblies.
Steel shoulder bushings are commonly used in mechanical systems where controlled alignment, repeatable installation depth, and long-term operational reliability are required.
Product Construction
The component features a cylindrical body combined with an integrated shoulder structure. The main outer diameter is tightly controlled to ensure accurate installation within mating housings, while the shoulder section provides positive axial location during assembly.
A precision-machined internal bore runs concentrically through the part, supporting shafts or pins with stable guidance. All functional diameters are produced on a common axis, with runout controlled to meet specified alignment requirements. This structural design helps reduce vibration, uneven wear, and assembly variation in operating equipment.
Technical Specifications
| Item | Specification |
|---|---|
| Product Type | Steel Shoulder Bushing |
| Material | 303 CRES per MIL-S-7720 |
| Surface Treatment | Passivation per ASTM A967 |
| Overall Height | 1.250 ± 0.010 in |
| Shoulder Height | 0.211 ± 0.005 in |
| Main Body OD | 0.5001 ± 0.0002 in |
| Shoulder Diameter | 0.624 ± 0.010 in |
| Inner Diameter | 0.376 ± 0.001 in |
| Runout Requirement | Diameters on common axis within 0.010 in |
| Manufacturing Process | CNC precision machining |
Key Features and Advantages
Precision CNC machining ensures consistent dimensional accuracy
Shoulder design provides reliable axial positioning
Controlled runout improves alignment stability
303 stainless steel offers good corrosion resistance and machinability
Passivated surface enhances cleanliness and service life
Suitable for tight-tolerance mechanical assemblies
Typical Applications
Mechanical locating and guiding systems
Shaft support assemblies
Industrial equipment bushings
Automation and motion control components
Custom machinery requiring precise alignment
Custom Steel Shoulder Bushing Manufacturing
We specialize in custom CNC machining of steel shoulder bushing components based on customer drawings or samples. Our manufacturing process supports tight tolerances, stable repeatability, and consistent inspection control.
Material grades, dimensions, surface treatments, and tolerance requirements can be adjusted according to specific application conditions. Low- to medium-volume production is supported for OEM and industrial customers.
Frequently Asked Questions
Q: What is the main function of a steel shoulder bushing?
A: A steel shoulder bushing is used to provide internal guidance and accurate axial positioning within an assembly. The shoulder prevents axial movement and ensures consistent installation depth during assembly.
Q: Can this shoulder bushing be produced with tighter tolerances?
A: Yes. Critical dimensions such as inner diameter, outer diameter, and concentricity can be machined to tighter tolerances based on drawing requirements and application needs.
Q: Is stainless steel required, or can other steel materials be used?
A: In addition to 303 stainless steel, other materials such as 304, 316, 416 stainless steel, or carbon steel can be supplied depending on corrosion resistance and strength requirements.
Q: What surface treatments are available?
A: Standard passivation per ASTM A967 is available. Additional treatments such as polishing, deburring, or special surface finishes can be provided upon request.
Q: Do you support custom or OEM shoulder bushing production?
A: Yes. We provide custom steel shoulder bushing manufacturing based on customer drawings, specifications, or samples, supporting OEM and long-term production programs.
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