Rebar Bending Center Pin

Bar Bender Spare Parts

Center Pin / Positioning Pin / Fixed Pin

• Rebar cutting blades

• Rebar bending blades

• Full set of rebar machine parts

• Rebar cutters

• Rebar benders

• Rebar straightening & cutting machines

• Construction projects

• Bridges and tunnels

• Rebar processing plants

• Precast component production lines

Quality & Production

Rebar Cutting Blades

• Treated with overall quenching and low-temperature tempering

• High wear resistance and impact resistance

• Sharp, smooth cutting – no jamming

• Square design, can be used on 4 sides

• Lower replacement and maintenance costs

Rebar Bending Blades

• Customized to your machine model and bending radius

• Precise heat treatment for strong fatigue resistance

• Stable size, accurate bending angle, no springback

• Bends rebar at multiple angles

• No chipping or deformation

Full Range of Spare Parts

• Fixed blade holders

• Connecting rods

• Sliders

• Gear shafts

• Center shafts

• Bending discs

• Clamps

• Positioning baffles

• Straightening wheels

• Traction wheels

• Cutter assemblies

• Made to OEM standards

• High precision, easy to install

• Surface treated for rust resistance and wear resistance

• Longer service life for your machines

Why Use Different Diameter Forming Shafts?

• Rebars of different sizes need different bending radii.

• Changing the forming shaft makes bending accurate.

• It also protects the rebar from damage.

About Materials

Why Hardness (HRC) Is Important for Pins

• How long they last

• How stable they work

• How safe they are

1. Resists wear and deformation

• Pins touch rebar and bending parts directly.

• Low hardness causes quick wear and dents.

• This makes bending angles inaccurate.

• Good hardness: HRC45–55 overall, HRC58–62 on key surfaces.

2. Prevents breaking or bending

• Pins bear strong pressure during bending.

• Soft pins bend or deform.

• Too-hard pins may break easily.

• Proper heat treatment gives both strength and toughness.

3. Reduces maintenance cost

• Good pins last longer.

• No frequent replacement.

• Less machine downtime.

• Lower overall costs.

What We Need to Custom Special Pins

1. Size and tolerance

• Diameter of each part with tolerance

• Length of each part with tolerance

• Special shapes: keyways, tapers, angles

• End shape: flat, round or countersunk

2. Heat treatment

• Type of heat treatment

• Required hardness (HRC)

• Where hardness is tested

3. Material

• 45# steel for standard use

• 40Cr steel for heavy loads (recommended)

Center Pins for CNC Bending Centers

• The center pin is the main support point.

• It bears strong force and repeated impact.

• Bad pins may break or cause uneven bending.

• This leads to wasted rebar.

• Stable bending radius

• High fatigue resistance

• Long service life

• Fit CNC bending centers and bending discs

Our Quality & Service

• We use advanced CNC machines and testing equipment.

• Strict quality checks from material to finished product.

• We support non-standard customization.

• We design parts based on your machine and needs.

• Improve efficiency and lower your production cost.

Metal Materials International Grade Corresponding Table

Rebar Bending Pins – Technical Specs Description

Technical Specs

Material Grade: 40Cr / 45# Carbon Steel

Hardness Level: 45–50 HRC (Induction Hardened)

Compatible Machines: GW40, GW42, GW50, GW60, CNC Stirrup Benders

Diameter: 20mm, 25mm, 30mm, 40mm, 45mm, 50mm (Customizable)

Surface Treatment: Precision Ground, Anti-rust Oiling, Blackening

Material Analysis

45# Carbon Steel: Good toughness and machinability, cost-effective for light‑to‑medium rebar bending.

40Cr Alloy Steel: Higher strength and fatigue resistance than 45#, widely used for general industrial bending.

Why Our Bending Pins Don’t Snap?

Unlike standard pins, our 40Cr bending pins undergo deep induction quenching, balancing surface hardness with core toughness to prevent snapping under high-torque loads.

How to Choose the Right Pin Diameter?

To meet the 4D/5D bending radius standard, selecting the correct center mandrel diameter is crucial. Our kit includes multiple sizes to ensure the structural integrity of the rebar.

FAQ

Q: What is the best material for rebar bending pins?

A: 45# Carbon Steel is general use. 40cr delivers better wear resistance and longer life for heavy‑duty industrial or CNC operations.

Q: Can these pins fit different brands of rebar benders?

A: Yes. They follow universal OEM standards for GW series machines. Custom machining is also available based on your center plate dimensions.

Q: Why do common bending pins break easily?

A: Poor heat treatment, low-quality material, or unmatched hardness cause snapping. Our pins use controlled induction hardening for stable hardness and toughness.

Q: How long do your bending pins typically last?

A: Service life depends on workload. 40Cr pins last 2–3 times longer than standard 45# pins;