Blades of The GQ50 Rebar Cutting Machine

The GQ50 rebar cutting machine is a key tool for large construction projects—it cuts high-tensile steel bars up to 50mm thick. But its performance depends entirely on the quality of its blades.

High-quality blades (made from H13 and Cr12MoV alloys) help:

Poor-quality blades cause rough cuts, more machine vibration, frequent downtime, and expensive repairs.

The GQ50 works under high hydraulic or mechanical pressure. Low-quality blades often have these problems:

We make GQ50 blades with top H13 and Cr12MoV alloys, plus advanced forging and heat treatment. They handle tough rebar and work reliably.

We only use H13 steels. These materials have high carbon and chromium, balancing hardness, wear resistance, and strength.

Key benefits of H13 blades:

Our H13 and Cr12MoV blades go through special vacuum heat treatment. This ensures consistent hardness (HRC 50-62) from surface to core.

The GQ50 is a standard model, but small blade size errors cause vibration and wear. Our blades are CNC-ground for a perfect fit.

Most of our GQ50 blades are square with four cutting edges. Rotate the blade when one edge is dull to quadruple its life.

To get the most out of your H13 and Cr12MoV blades:

High-quality H13 and Cr12MoV blades lower your cutting costs, protect your machine, and keep construction on track. Choose our professional blades for better performance and durability.

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.