Phone:
86-15852949220
NANJING ALAS INTERNATIONAL CO., LTD
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Comprehensive Selection: Multiple outer diameters (OD) to achieve standard 4D, 5D bending radii for all rebar thicknesses.
Premium Material Options: Forged from high-tensile Cr12MoV or 40Cr alloy steel, both resisting structural deformation under extreme lateral pressure for different processing needs.
Vacuum Quenched: Every sleeve is vacuum quenched for superior wear resistance during long-term on-site use.
Standard & Custom Sizes: Standard diameters (30mm-100mm) and bespoke sleeves made to your machine’s center pin dimensions.
Carbon (C): 1.45% - 1.70% – Boosts hardness and wear resistance
Chromium (Cr): 11.50% - 13.50% – Improves corrosion and wear resistance
Molybdenum (Mo): 0.40% - 0.60% – Reduces internal stress; improves toughness
Vanadium (V): 0.15% - 0.30% – Refines structure; enhances hardness and stability
Silicon (Si): 0.20% - 0.40% – Increases strength and deoxidation
Manganese (Mn): 0.20% - 0.40% – Improves hardenability and toughness
Phosphorus (P): ≤ 0.030% – Minimized to avoid brittleness
Sulfur (S): ≤ 0.030% – Controlled to prevent defects
Hardness (HRC): 60 - 64 – Uniform throughout; no soft core
Tensile Strength (σb): ≥ 2000 MPa – Handles extreme pressure without cracking
Impact Toughness (αk): ≥ 25 J/cm² – No brittle fracture in cold or high-speed use
Wear Resistance: Superior to common alloys – Longer service life
Dimensional Stability: ≤ 0.005mm/m – Precise fit; consistent bending
Corrosion Resistance: Resists rust and oil – Suitable for harsh job sites
Carbon (C): 0.37% - 0.44% – Provides basic hardness and strength
Chromium (Cr): 0.80% - 1.10% – Enhances wear resistance and hardenability
Silicon (Si): 0.17% - 0.37% – Improves strength and deoxidation performance
Manganese (Mn): 0.50% - 0.80% – Boosts hardenability and toughness
Phosphorus (P): ≤ 0.035% – Minimized to avoid brittleness
Sulfur (S): ≤ 0.035% – Controlled to prevent internal defects
Nickel (Ni): ≤ 0.30% – Residual content, no obvious impact on performance
Copper (Cu): ≤ 0.30% – Residual content, ensures processing performance
Hardness (HRC): 32 - 36 (After tempering); up to 55 HRC after surface quenching
Tensile Strength (σb): ≥ 980 MPa – Handles regular bending pressure stably
Yield Strength (σs): ≥ 785 MPa – Good load-bearing capacity without deformation
Impact Toughness (αkv): ≥ 47 J – Excellent toughness, avoids brittle fracture
Wear Resistance: Good – Suitable for regular rebar processing scenarios
Processability: Excellent – Easy to forge, machine and heat treat
Rebar is clamped tightly between the central and positioning rollers (fixed support points).
The machine drives the movable roller to rotate and apply uniform bending pressure.
Rebar undergoes plastic deformation around the central roller to complete bending.
Adjust the central roller’s diameter to change the bending radius.
Control the bending angle (0-180° stepless adjustment) via the working disc’s rotation angle.
Central Roller: Fixed at the work plate center. Its diameter determines the minimum bending radius—core for all bending operations.
Movable Roller: Applies bending force via rotation. Adjustable position; key for controlling bending angle.
Positioning Roller: Auxiliary support. Prevents rebar displacement/warping during bending for stable processing.
Small: For 6-16mm rebar (stirrups, small prefabricated components).
Medium: For 18-28mm rebar (main structural rebar in beams, slabs).
Large: For 32-50mm rebar (columns, shear walls, heavy components).
Special: Custom-made for irregular rebar, high-strength threaded steel, HRB500 grade steel.
Roller Diameter: 25-120mm (1.5-5x the processed rebar diameter; affects bending radius).
Roller Width: 15-50mm (depends on rebar diameter and quantity per bend; wider = more stable).
Shaft Hole Diameter: 16-40mm (matches bender’s working disc shaft; ensures stable installation).
Precision Forging: Densifies internal metal structure; improves strength and impact resistance.
Vacuum Heat Treatment: Uniform quenching avoids deformation; ensures hardness and dimensional accuracy.
Precision Grinding: Controls roller diameter tolerance within ±0.02mm; ensures fit and bending accuracy.
Building Construction: Bending rebar for beams, columns, slabs, shear walls (residential/commercial buildings).
Bridge Engineering: Precise bending of prestressed and irregular rebar for complex structures.
Tunnel Engineering: Bending rebar for arched structures and grid steel frames.
Rebar Processing Plants: Mass production of standard rebar components (boosts efficiency).
Precast Component Factories: Processing rebar frameworks for prefabricated beams, slabs, stairs.
Compatibility: Match the bender model; confirm shaft hole diameter and installation method.
Rebar Fit: Choose roller size based on daily rebar diameter range.
Material: Select Cr12MoV for heavy-duty, high-wear scenarios; choose 40Cr for regular-duty, cost-effective needs.
Before use: Check installation; clean rebar fragments, rust, and oil.
During use: Follow size limits; avoid overloading to prevent deformation/chipping.
After use: Clean stains; apply anti-rust oil to shaft hole and mating surfaces.
Disassemble rollers; clean impurities and rust.
Inspect for wear, cracks, or deformation; check mating surface accuracy.
Lubricate shaft holes and rotating parts; replace old lubricant.
Polish minor wear; store in a dry, ventilated area after maintenance.
Slight wear/scratches: Repair by polishing or welding/grinding.
Severe wear, cracks, deformation, or shaft hole misalignment: Replace promptly.
Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.