Contact Us
REQUEST A CNC OR STAMPING SERVICE QUOTE FROM OUR EXPERTS TODAY!
Upload files ( Max file size: 20MB )
-
-
-
en
This series of 40Cr quenched and tempered steel precision end covers (Model: XF750A-2114.6, Intermediate End Cover) are core connection and sealing components specially designed for construction machinery, hydraulic transmission equipment, and heavy-duty industrial systems. Made from 40Cr alloy structural steel, the material undergoes quenching and tempering heat treatment (HB255-285) to optimize the metallographic structure, significantly improving strength, toughness, and fatigue resistance. They are then formed via integrated CNC precision turning, drilling, and boring processes, strictly adhering to drawing tolerance requirements, making them key parts for ensuring equipment concentricity, sealing performance, and long-term operational stability.
Application Industries: Construction machinery, hydraulic transmission systems, mining equipment, heavy-duty industrial machinery, rail transit transmission mechanisms
Manufacturing Process: 40Cr alloy steel cutting → quenching and tempering heat treatment → CNC precision turning (inner/outer diameters, end faces) → drilling and tapping → boring finishing → deburring and chamfering → anti-rust treatment
Machining Precision: Key dimensional tolerances are strictly controlled within ±0.01mm, with coaxiality and circular runout errors ≤0.008mm. The end face roughness reaches Ra1.6, and the remaining surface roughness is Ra6.3, fully meeting the drawing technical requirements
Core Production Equipment: CNC lathes, vertical machining centers, CNC drilling and tapping centers, heat treatment furnaces, precision cleaning equipment
Material Performance: After quenching and tempering, 40Cr steel has a hardness of HB255-285, tensile strength ≥980MPa, yield strength ≥785MPa, combining high strength, high toughness, wear resistance, and impact resistance, suitable for heavy-load, vibration, and alternating load conditions
Available Post-Processing: Quenching and tempering heat treatment, deburring, sharp edge chamfering (C0.5/C1), surface polishing, anti-rust oil/anti-rust paint treatment, precision cleaning, custom engraving and marking
Lead Time: 5-7 days for samples, 7-15 days for small-to-medium batches; lead times for large orders can be negotiated based on production capacity
High-Strength Reliable Material: 40Cr alloy steel with quenching and tempering solves the problem of insufficient strength and easy deformation/cracking of ordinary carbon steel. It is suitable for the harsh working conditions of construction machinery, with excellent impact and fatigue resistance
Ultra-Precision Machining: Full-process CNC precision machining strictly controls coaxiality, position, and end face perpendicularity, ensuring perfect assembly between the end cover, shaft, and housing, and guaranteeing sealing performance and transmission concentricity
Comprehensive Post-Processing Services: We provide full-process post-processing from heat treatment to anti-rust and cleaning, and can customize surface treatment solutions according to customer needs to adapt to special requirements such as dust-free assembly and high cleanliness
Customization Capability: We support custom processing according to drawings, and can optimize processing technology and surface treatment solutions based on customer equipment working conditions to adapt to different models of construction machinery and hydraulic systems
Stable Bulk Delivery: Mature production processes and quality control systems ensure stable delivery of large-volume orders, guaranteeing customer project schedules and supporting long-term supporting cooperation
Each end cover undergoes strict full-process quality inspection, including dimensional tolerance testing, hardness testing, surface defect testing, and coaxiality testing, to ensure 100% compliance with drawing technical requirements and prevent defective products from leaving the factory.
