Rebar Bending Machine Piles And Bushings

Universal Bending Machine Pins & Bushings (Full Range of Sizes)

Reliable Rebar Bending Machine Pins and Bushings for Construction

• Construction sites are harsh. A rebar bending machine’s reliability depends on its pivot parts (pins and bushings, also called piles and sleeves).

• Pins and bushings take the full force of high-tensile steel reinforcement bars.

• Worn parts cause wrong bending angles and more stress on the machine’s motor.

Product Overview

• Center pins

• Work pins

• Forming bushings (sleeves)

Key Features & Technical Details

• Full Size Range: Diameters 20mm–100mm. Works for different rebar thicknesses and 4D/5D bending radii.

• Strong Material: Forged 40Cr or Cr12MoV alloy steel. Pins and bushings stay straight and undamaged under high torque.

• Induction Hardening: All parts are vacuum-treated. Great wear resistance for heavy construction work.

• Precise Fit: Precision-ground to avoid wobbling on the bender’s center plate.

• Customizable: We make rebar bending machine accessories based on your needs.

About Our Company

• We research, develop, produce, and sell core tools and accessories for rebar processing.

• Our main products:

• Rebar cutting blades

• Rebar bending blades

• All types of rebar machine accessories

• Our products fit most rebar processing equipment:

• Rebar cutting machines

• Rebar bending machines

• Straightening-cutting machines

• Used in: Construction, bridges, tunnels, rebar processing plants, precast component lines.

Core Product Details

1. Rebar Cutting Blades

• Treated with quenching and low-temperature tempering (wear-resistant, impact-resistant).

• Finely ground cutting edge: Smooth, no jams. Good for batch rebar cutting.

• Square modular design: Rotate 4 sides. Lowers replacement and maintenance costs.

2. Rebar Bending Blades

• Customizable: Matches your bending machine model and bending radius.

• Precise heat treatment: Good fatigue resistance and stable size.

• Precise bending angle: No rebound. Bends rebar at multiple angles. No chipping or deformation.

3. Rebar Machine Accessories

• Cutting machines: Fixed blade holders, connecting rods, sliders, gear shafts

• Bending machines: Central shafts, bending discs, clamps, positioning baffles

• Straightening machines: Straightening wheels, traction wheels, cutter assemblies

• Meets original equipment standards: High precision, perfect fit, easy to install.

• Surface treatments (carburizing, quenching, galvanizing): Rust-resistant, wear-resistant. Extends equipment life.

Our Advantages

• Advanced equipment: CNC machining centers, hardness and precision testing tools.

• Strict quality control: Inspect every step from raw materials to finished products.

• Non-standard customization: Design tools/accessories based on your equipment and needs.

Common Pins We Offer

• Center Pin

• Positioning Pin

• Fixed Pin

Frequently Asked Questions (FAQs)

• Q: Why do rebar bending machines need different diameter forming shafts?

  A: Different rebar diameters need different bending radii. Changing the forming shaft ensures correct angles and protects rebar.

• Q: Do 45# steel and 40Cr steel need heat treatment?

  A: Yes. Heat treatment brings out their full mechanical properties.

I. Why Heat Treatment Hardness (HRC) Matters for Bending Machine Pins

• Pins are core load-bearing parts. They take radial pressure, torsion, and repeated friction.

• Hardness directly affects service life, stability, and safety.

• Pins with poor hardness fail fast, causing equipment breakdowns or accidents.

Key Functions of Proper Hardness

• Wear Resistance: Prevents quick wear and deformation.

• Pins touch rebar and bending discs. Low HRC causes wear, dents, and wrong angles.

• Qualified pins: Surface HRC45~55 (core surface up to HRC58~62).

• Compressive/Torsional Strength: Prevents fracture.

• Pins take large pressure and slight torsion when bending.

• Low hardness causes deformation; poor hardness-toughness causes brittle fracture.

• Tempered pins (HRC45~55): Strong and tough. No jams or flying rebar.

• Lower Maintenance Costs: Qualified pins wear slowly. Less replacement, less downtime. Saves money and keeps work on track.

II. Drawing Parameters for Custom Special-Shaped Bending Machine Pins

1. Basic External Dimensions (Tolerances Required)

• Each section: Diameter + tolerance (e.g., h6/h7 for mating sections, f8 for non-mating) + length + tolerance.

• Special-shaped parts: Keyway width/depth, taper angle/length. Mark no transition angle clearly.

• Ends: Flat/round/countersunk head. Mark spherical radius (round head) or countersunk depth/diameter (countersunk head).

2. Process & Heat Treatment Requirements

• Specify heat treatment process (e.g., tempering, surface hardening + tempering) + hardness (e.g., overall HRC45~50, surface HRC58~62). Mark where to test hardness.

3. Material Requirements

• Recommended materials: 45# steel, 40Cr (best for heavy-duty special-shaped pins).

Usage & Maintenance Tips

• Daily Lubrication: Use heavy-duty lithium grease on bushings to remove dust and grit.

• Check for Scoring: Replace pins with deep grooves right away to avoid damaging the bending arm.

• Correct Sizing: Bushing inner diameter must match the pin perfectly. A 0.5 mm gap can cause serious failure under high torque.

Metal Materials International Grade Corresponding Table