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Product Description
The knife frame, or blade holder, is the structural backbone of a heavy-duty hydraulic or mechanical shear. Operating under immense cyclical stress, extreme shock loads, and massive shearing forces, this component is critical to the shear's performance and reliability. A failure in the knife frame due to fatigue or cracking results in catastrophic failure and prolonged operational downtime.
Yile Machinery specializes in the manufacture of robust, OEM-equivalent replacement knife frames for the most demanding shearing applications in steel mills and scrap recycling yards. Our focus is on delivering a component with superior structural integrity and the dimensional accuracy required for optimal cutting performance.
A shear knife frame's longevity is determined by the quality of its casting and the precision of its machining. Our process is designed to build in durability from the very first step.
Each frame is produced as a single-piece casting from high-strength cast carbon and alloy steels (e.g., ZG270-500 and other equivalents). Our controlled foundry processes ensure a sound, homogenous casting free from internal voids or defects that could lead to stress concentrations.
After casting, the frame undergoes a crucial heat treatment cycle (such as Normalizing or Tempering).
Benefit: This process relieves internal stresses created during casting and cooling. It refines the steel's grain structure, significantly improving its toughness and resistance to fatigue cracking under the millions of load cycles it will endure.
The heat-treated casting is finished in our large-capacity CNC machining centers. We pay special attention to the critical blade mounting surfaces.
Benefit: Precision machining guarantees that the blade seats are perfectly flat, parallel, and positioned according to OEM specifications. This ensures accurate blade alignment, which is essential for a clean cut, uniform blade wear, and preventing damage to the shear's hydraulic and mechanical systems.
We understand that you cannot afford a failure. Every knife frame is subject to a rigorous quality assurance protocol before shipment.
Ultrasonic Testing (UT): The raw casting is inspected to confirm its internal soundness and freedom from defects.
Magnetic Particle Inspection (MPI): After machining, all critical surfaces and radii are inspected to ensure they are free of any surface cracks.
CMM Dimensional Inspection: We use Coordinate Measuring Machines (CMM) to verify all critical dimensions, including the flatness and parallelism of blade seats and the location of bolt holes.
Full Documentation: Each frame ships with a complete quality file, including material certifications, heat treatment reports, and full dimensional inspection reports.
We manufacture replacement knife frames for a wide range of heavy-duty shearing equipment:
Hydraulic Scrap Shears
Guillotine Shears
Billet and Bloom Shears in Steel Mills
Alligator Shears
Other heavy metal cutting machinery
Ensure Shear Reliability with a Precision-Made Knife Frame. Get a Quote.
Contact us with your OEM part number, technical drawings, or even a sample part to reverse-engineer. Our team will provide a comprehensive and competitive quotation.
