Ningbo Fenghua Bolong Machinery Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of press-in block in China. Please feel free to buy durable press-in block made in China here from our factory. All customized products are with high quality and competitive price.
Core Advantages
Precision Interference Fit - Components are machined to precise O.D. specifications that ensure consistent press-in force during assembly. Interference is controlled to provide adequate retention without causing housing deformation or excessive installation force.
Multiple Material Options - Available in high-strength steel, stainless steel, copper alloys, and aluminum alloys. Material selection is based on the mating housing material, required load capacity, and environmental exposure.
Surface Finish Optimization - Surface roughness is controlled to ensure consistent friction characteristics at the press-fit interface. Defined surface finishes prevent galling during installation and provide predictable press-in force.
Precision Dimensional Control - All critical dimensions - O.D., bore, length, and concentricity - are held to tight tolerances. Automated inspection systems verify dimensions on 100% of production in high-volume applications.
Installation Verification - Press-in force data can be provided upon request from customer assembly lines to validate installation consistency and detect any deviations from specification.
Corrosion Protection - Steel versions are available with zinc plating, phosphating, or Dacromet coatings. Aluminum versions can be anodized for protection against galvanic corrosion in dissimilar metal interfaces.
Full Traceability - O.D. and I.D. inspection data is archived per production lot. Material certifications and coating thickness reports are provided with each shipment.
Technical Specifications
|
Parameter |
Details |
|
Product Name |
Press-in Blocks - Interference Fit Precision Components |
|
Materials |
High-strength steel, stainless steel, copper alloy, aluminum alloy |
|
Manufacturing Process |
Precision machining, cold heading, grinding, finishing |
|
Size Range |
O.D. 3-80mm; I.D. 1-60mm; Length 2-100mm (customizable) |
|
Tolerances |
O.D. ±0.005-0.010mm; I.D. ±0.005-0.015mm |
|
Surface Finish |
Ra 0.4-1.6μm (per specification) |
|
Surface Treatment |
Zinc plating, phosphating, Dacromet, anodizing |
|
Quality Systems |
IATF 16949 certified manufacturing |
Manufacturing Process
|
Stage |
Key Operations |
Quality Gates |
|
Material Prep |
Bar/coil cutting → cold heading or CNC slug preparation |
Material certificate; chemical composition check |
|
Rough Machining |
CNC turning or cold heading → preliminary O.D./I.D. |
Dimension verification; process capability |
|
Finish Machining |
Precision grinding/boring → O.D. and I.D. finishing |
100% O.D./I.D. verification; surface roughness check |
|
Surface & Final |
Surface treatment → deburring → final inspection |
Coating thickness; O.D. final verification; packaging |
Quality Control
Machining Phase: Critical O.D. and I.D. dimensions are verified using high-precision gauges or CMM equipment. 100% inspection is performed on high-volume production using automated gauging. Surface finish is measured on sample basis to verify Ra values.
Final Release: O.D., I.D., and length are 100% verified in high-volume production. Surface treatment integrity is validated through coating thickness measurement and salt spray testing on sample basis. Each production lot is documented with full dimensional inspection reports and material certificates.
Application Scenarios
Steering Knuckle Installation
Press-in blocks provide the precisely controlled interference fit interface for steering knuckle components, ensuring accurate alignment and secure retention without the need for separate fasteners or adhesives.
Heavy-Duty Connecting Rod Applications
Precision press-in components for connecting rod assemblies requiring high interference fit retention. Consistent O.D. control ensures correct installation force and retention at elevated operating temperatures.
General Automotive Locating & Retention
Press-fit components provide reliable locating and retention for a wide range of automotive and industrial applications where dimensional accuracy and secure interference fit installation are required.
Custom Services
Engineering consultation
Design review based on your O.D./I.D. requirements and interference specifications
Custom sizing
O.D., I.D., length, and material per your drawing
Material selection
Steel, stainless, copper alloy, or aluminum based on mating housing and load requirements
Surface treatment
zinc plating, phosphating, Dacromet, or anodizing
Sample support
Prototype quantities for installation force validation
Production volume
From pilot lots to high-volume production
Whether you need precision press-fit components for steering applications or other interference-fit installations - our engineering team delivers from design through precision machining to production.
Contact Us for Your New Project
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