Why Our GQ40 Rebar Cutting Blades Stand Out
The GQ40 rebar cutting machine is a staple on construction sites, yet its efficiency and reliability depend entirely on high-performance blades. Our custom replacement blades are specially designed for heavy-duty shearing of carbon steel, hot-rolled round bars, and high-strength deformed rebar, perfectly compatible with GQ40, GQ42, GQ45, and GQ50 rebar cutting machines to cover wider construction equipment applications.
Key Technical Advantages
Premium Material Selection
We offer multiple professional material options to suit different construction needs:
H13: Mainstream high-grade material with exceptional wear resistance, toughness, and thermal stability. It resists deformation and chipping during long-term high-intensity cutting, ideal for mass processing of high-strength rebar.
Cr12MoV (D2): High-hardness, high-wear-resistance tool steel with hardness up to HRC 58–62, delivering an excellent balance of hardness and toughness to prevent chipping under heavy loads.
9CrSi: Economical and practical with great hardenability and machinability, perfect for cutting medium and low-strength rebar in small and medium-sized projects.
Four‑Sided Usable Design
Our rebar cutting blades adopt a square structure with four usable cutting edges. By simply rotating the blade, you can extend service life significantly, reducing replacement frequency and overall construction costs.
Precise Equipment Matching
Shape & Structure: Square blades maximize edge utilization for large-scale construction; rectangular blades suit small-tonnage cutters.
Size Compatibility: Strictly manufactured to standard dimensions for GQ40, GQ42, GQ45, GQ50 series machines, including thickness, length, width, and bolt hole spacing, ensuring a perfect fit without shaking or misalignment.
Adaptability to Rebar Types
Ordinary round steel: Low hardness and cutting resistance, well served by 9CrSi or Cr12MoV blades for cost-effective performance.
High-strength ribbed rebar: High hardness and severe abrasive wear, for which H13 blades are recommended to resist chipping and ensure stable continuous cutting.
Advanced Manufacturing Process
All blades undergo precision CNC grinding and vacuum heat treatment, resulting in uniform hardness distribution, high dimensional accuracy, and strong edge retention. They cut smoothly with less vibration, ensuring clean, vertical cut surfaces and reduced risk of chipping or dulling.
Alas Application Engineering & Technical Support
Material‑Specific Recommendations
Backed by Alas application engineering, we provide tailored material‑specific recommendations based on your rebar grade, cutting intensity, and machine model, ensuring optimal blade performance and longevity.
Setup Guidance & Clearance Parameters
Our team delivers professional setup guidance and precise clearance parameters for moving and stationary blades, calibrated to rebar diameter and machine type, to ensure stable cutting and extend service life.
Blade Specification Checklist
We supply a complete blade specification checklist covering dimensions, hole spacing, hardness, and edge design, so you can verify compatibility with GQ40, GQ42, GQ45, and GQ50 cutters before installation.
Problem‑Solution Engineering
Through problem‑solution engineering, we analyze on‑site failures and refine blade design and heat treatment to reduce chipping and breakage even in high‑impact, high‑hardness rebar cutting.
Engineering Support for Complex Jobs
For heavy‑duty and complex jobs, we offer dedicated engineering support for complex jobs, optimizing blade selection and operating parameters to handle extreme conditions reliably.
Minimize Downtime Through Engineering
With Alas technical support and data‑driven tuning, we help you minimize downtime through engineering by preventing premature failure, reducing changeovers, and maintaining consistent cutting efficiency.
Custom Rebar Cutting Blades
Through optimized hardening depth and toughness matching, our custom blades effectively solve the common industry issue of brittle fracture when cutting high-strength rebar.
H13 blades, in particular, offer outstanding wear resistance and stability during long continuous operation, with minimal deformation or chipping. As a preferred choice for international trade, they greatly lower logistics and customs costs by reducing replacement frequency.
9CrSi blades remain a cost-effective solution for general medium and low-strength rebar cutting, widely used in small and medium construction projects.
Maintenance Tips for Rebar Cutting Blades
To maximize service life:
Tighten blade bolts firmly before operation to avoid loosening, the leading cause of premature breakage.
Adjust the proper dynamic and static blade clearance according to rebar diameter.
Match blade material and model to your rebar type and working intensity for optimal performance.
Core Comparison of rebar blade Model-Dimension-Material
Model | Typical Blade Dimension (mm) | Thickness (mm) | Hole Configuration | Mainstream Materials | Key Parameters of Adaptable Machine |
GQ40 | 83×83 / 90×90 | 16–20 | Single-hole, Double-hole | H13, 9CrSi | Cuts Φ6–40mm round steel; Motor power 2.2kW; Overall weight ≈485kg |
GQ50 | 90×90 / 100×100 | 20–28 | Double-hole, Four-hole | H13, CR12MOV | Cuts Φ6–50mm round steel; Motor power 4kW; Overall weight ≈640kg |
GQ60 | 100×100 / 130×130 | 28–30 | Mainly Four-hole | H13, H13K | Cuts Φ6–55mm round steel; Motor power 5.5–7.5kW; Overall weight ≈1200kg |
Blade Metal Materials Grade Correspondence Table
Base Grade | Steel Category | Chinese Standard GB/T 1299 | American Standard ASTM | German Standard DIN (W-Nr.) | Japanese Standard JIS |
H13 | Hot Work Die Steel | 4Cr5MoSiV1 | H13 | 1.2344 | SKD61 |
Cr12MoV | Cold Work Die Steel | Cr12MoV |
| 1.2601 | SKD11 |
9CrSi | Alloy Tool Steel (Cutting Tool Steel) | 9CrSi |
| 1.2108 |
|
rebar cutting blades drawing
Installation location of the rebar cutting blade
Rebar Cutting Machine Quick Blade Replacement: 5 Safety Steps
Core Principles: Power off and stop completely → Confirm no pressure → Standard disassembly and assembly → Precise adjustment → Test run verification. Avoid pressurized and live electrical operation throughout the process to prevent blade pinching injuries and accidental equipment startup risks.
Step 1: Power off and lock out, completely stop the machine
Turn off the main power supply of the cutting machine, unplug the power cord/switch off the circuit breaker; manually rotate the equipment flywheel to confirm that the blade holder has no inertial movement and is completely stationary, preventing accidental equipment startup.
Step 2: Release pressure, disassemble protection
Loosen the unloading valve of the equipment's hydraulic system (for hydraulic models), completely release the hydraulic pressure inside the blade holder to prevent the blade holder from suddenly rebounding; remove the safety guard and fixing clips at the blade, and clean up rebar scraps and debris between the blade holder and the blade to ensure unobstructed disassembly and assembly space.
Step 3: Standard disassembly, gentle handling
Use a special wrench to loosen the blade fixing bolts (disassemble in a diagonal sequence to prevent deformation of the blade holder), strictly avoid directly striking the blade/bolts with a hammer; during disassembly, steadily support the blade with your hand and place the old blade properly in a non-slip, non-impact area.
Step 4: Precise installation, leveling and gap adjustment
Smoothly fit the new blade to the positioning surface of the blade holder, confirm that the blade installation direction (cutting edge facing the shearing side) is correct, and gradually tighten the fixing bolts in a diagonal sequence (even torque to prevent blade misalignment); adjust the gap between the moving and stationary blades, the conventional rebar cutting gap is controlled at 0.1~0.3mm, a gap that is too large is prone to material jamming, and a gap that is too small is prone to blade wear.
Step 5: Reset protection, no-load test run
Reset and lock the safety guard; after switching on the power, jog the equipment 2-3 times without load, check that the blade holder runs smoothly and the blade is free from jamming/abnormal noise, and after confirming that the shearing action is normal, then perform a rebar test cut. If the test cut is successful, it can be used normally.
FAQ
Question 1: What are the main material options for our rebar cutting blades?
Based on different working conditions and budget requirements, we offer three general industrial-grade alloy steel materials:
9CrSi (Alloy Tool Steel): An economical choice. It has good hardenability and machinability, suitable for cutting ordinary medium-to-low strength rebar, and is widely used in small and medium-sized projects.
Cr12MoV (Cold Work Die Steel): High-end wear-resistant type. High carbon and high chromium content, after heat treatment, it has excellent wear resistance, making it an ideal choice for continuous cutting of high-strength rebar. Its service life is much longer than 9CrSi.
H13 (Hot Work Die Steel/Red Hard Steel): High toughness and high wear resistance. It exhibits excellent resistance to chipping and thermal stability in rebar cutting applications, especially suitable for high-speed production lines or online cutting of hot-rolled rebar, and cutting of ultra-thick rebar and composite materials of scrap rebar.
Question 2: Why do my blades often chip? Is it a material problem?
Chipping is usually caused by the following factors:
Insufficient toughness: Using ultra-hard but low-toughness materials to cut large-diameter or ultra-hard rebar can easily lead to brittle fracture. In this case, we recommend switching to H13 material, as its excellent toughness can effectively absorb impact forces.
Improper clearance: Too large or too small a gap between the upper and lower blades will lead to uneven stress, resulting in chipping.
Insufficient heat treatment: Internal stress is not completely eliminated. All our blades use vacuum heat treatment technology to ensure uniform hardness from the inside out, greatly reducing the chipping rate.
Question 3: What is the biggest performance difference between 9CrSi and Cr12MoV?
Wear resistance: Cr12MoV has significantly better wear resistance than 9CrSi. Under the same working conditions, the number of cuts for Cr12MoV is usually 2-3 times that of 9CrSi.
Cost: 9CrSi is more cost-effective, suitable for projects sensitive to initial purchase costs; although the unit price of Cr12MoV is slightly higher, its lower replacement frequency results in a lower overall cutting cost per ton of rebar.
Question 4: Which material is recommended for high-strength deformed rebar (e.g., HRB500E) or thick rebar?
For high-strength or ribbed rebar, we strongly recommend H13:
If you are facing extremely high operating intensity and are concerned about downtime due to blade chipping, choose H13. Its impact fatigue resistance is top-notch in the rebar processing industry.
Question 5: Can you customize non-standard size blades according to drawings?
Yes. We understand that blade specifications vary among different equipment brands (e.g., from Italy, Germany, or China). We are equipped with a full set of CNC machining equipment, and you only need to provide the following information:
Detailed drawings (including length, width, thickness, and hole dimensions).
Material requirements (9CrSi, Cr12MoV, or H13).
Specifications of the workpiece to be processed (rebar diameter and strength grade).
We can provide a 1:1 precise customized solution.
Question 6: How to maintain the blades to extend their service life?
Regular rotation: Our blades are usually designed with 4 or 8 cutting edges. Please rotate the blade promptly when one cutting edge becomes dull.
Tighten bolts: Ensure the blades are securely installed. Any slight looseness will cause destructive impact during the cutting process.
Control the gap: Adjust a reasonable blade gap according to the rebar diameter, usually about 10% of the rebar diameter.
