Bar Bender Spare Parts
Center Pin / Positioning Pin / Fixed Pin
We can customize rebar bending machine pins to fit your machines.
Our company makes, develops and sells core tools and parts for rebar processing.We produce:
Our parts work with many machines:
They are used in:
Quality & Production
We use high-quality materials and precise processing.
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
We provide complete parts for rebar machines.
For cutting machines:
Fixed blade holders
Connecting rods
Sliders
Gear shafts
For bending machines:
Center shafts
Bending discs
Clamps
Positioning baffles
For straightening machines:
Straightening wheels
Traction wheels
Cutter assemblies
All parts:
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
45# steel and 40Cr steel both need proper heat treatment.Without it, they cannot reach their full strength.
Why Hardness (HRC) Is Important for Pins
Bending machine pins carry heavy loads.They are pressed, twisted and rubbed repeatedly.Hardness from heat treatment decides:
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
To make custom pins, we need clear drawings with:
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
Center Pins for CNC Bending Centers
In automatic CNC rebar 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.
Our high-performance center pins:
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
Chinese GB standards | American AISI/SAE standards | Japanese JIS standards | German DIN standards | Russian GOST standardss |
45#steel | 1045 | S45C | C45（1.1191） | 45 |
40Cr | 5140 | SCr440、SCr440H | 41Cr4（1.7035） | 40X |
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;