GQ40 / GQ45 / GQ50 / GQ60 Rebar Cutting Machine Blades

ALAS Machinery manufactures industrial-grade replacement shear blades and square cutting blocks compatible with mainstream standard GQ40, GQ50, and GQ60 rebar cutting machines. Utilizing an engineering-proven 4-way indexable edge design, each individual blade block provides four identical cutting faces to multiply operational lifespan and reduce total tooling procurement cycles. All batches undergo advanced vacuum heat treatment to maintain uniform cross-sectional hardness under continuous mechanical shearing stresses.

1. Core Comparison of Rebar Blade Model-Dimension-Material

2.Practical Performance Comparison of Rebar Blade Materials

Below is the technical evaluation of the three primary tool steel grades utilized in industrial rebar shearing operations, detailing material limits, heat treatment values, and core operational configurations.

Key Takeaway: Material selection depends strictly on applied dynamic shock profiles and the alignment stability of the tool holder setup. While Cr12MoV suits controlled plant environments, for rugged field site operations and heavy-duty infrastructure projects involving mechanical vibrations and unstable onsite maintenance, AISI H13 is recommended to eliminate premature structural fracturing and maximize blade uptime against catastrophic chipping.

3. Performance Specifications & Material Selection Selection

Cr12MoV / AISI D2 (58–60 HRC): Hardened via vacuum heat treatment for high abrasive wear resistance during continuous cold-shearing of HPB300 and HRB400 rods. Restricted to uniform loading environments due to low impact toughness; clearance mismatches cause immediate micro-cracking.

AISI H13 / DIN 1.2344 (50–55 HRC): Deployed for high-tensile bars (HRB500), diameters above 32mm, surface weld flashes, or clearance mismatches. The secondary-hardened vanadium-chromium matrix provides dynamic peak shock absorption and hot hardness to stop structural chipping.

9CrSi Alloy Tool Steel (55–58 HRC): Optimized for light-duty, intermittent shearing of small-diameter plain round carbon steel under minimal load parameters. Possesses low thermal stability and low fatigue resistance under continuous field duty.

4. Machine Compatibility & Maintenance Tips

Equipment Compatibility: Standard 83×83mm geometries fit GQ40, GQ42, and GQ45 machinery. Custom dimensional blueprints are implemented for GQ50 and GQ60 tool holders. Custom order fabrication requires a strict 10 to 15 business days lead time.

Rotation Schedule: Synchronized pairs rotation of the 4-way indexable GQ Rebar Cutting Machine Blades must occur every 2–4 weeks, or immediately upon detection of cutting burrs, mechanical noise, or increased kinetic resistance.

Clearance & Seat Maintenance: Mechanical gap settings must be calibrated strictly between 7% to 10% of the target rebar diameter to prevent structural bending stress. Mounting bolts must remain torqued, and seat debris must be cleared regularly to maintain the total dimensional deviation limit ≤ 0.05 mm.

5. Frequently Asked Questions (FAQ)

Q1: Do your replacement blocks strictly match the original OEM bolt hole center-to-center distances?

• CNC boring accuracy. All GQ Rebar Cutting Machine Blades are processed via automated CNC boring lines to guarantee a dimensional pitch tolerance ≤ ±0.1mm.

• Universal fitment alignment. Geometries for GQ40 (83×83×26mm), GQ50, and GQ60 align exactly with factory cutter heads and countersunk depths to prevent mechanical play.

• Elimination of manual shims. Precision structural formatting ensures zero on-site machining or manual shim thickness corrections during tool replacement.

Q2: What are the exact bolt hole spacing configurations for standard GQ series cutting blocks?

• Multi-hole geometry matrices. The inventory provides center single-hole configurations for 83×83×26mm shapes, alongside double-hole and four-hole matrices for larger blocks.

• Standardized bolt pitches. 90×90mm and 100×100mm blocks are machined with industry-standard 50mm bolt pitches to secure the assembly inside the tool holder.

• Blueprint verification protocol. Pre-shipping data requires cross-checking technical drawings against the universal linear flatness constraint line of ≤ 0.03 mm/100mm.

Q3: How do we determine the threshold between selecting Cr12MoV and H13 tool steels for our job sites?

• Cr12MoV locked at 58–60 HRC (batch tolerance ±1.0 HRC). This cold-work alloy operates under uniform stroke speeds and stable plant parameters to cold-shear standard HPB300 and HRB400 rods.

• H13 locked at 50–55 HRC (3-time tempering process). This hot-work alloy is mandatory under unstable field maintenance, variable clearances, or when cutting high-tensile HRB500 / HRB600 profiles.

• Dynamic impact absorption. Shifting from Cr12MoV to H13 resolves edge micro-shattering because the secondary-hardened vanadium-chromium matrix absorbs excessive bending stress where standard steels fail.

Q4: What is the packaging specification, case weight, and volume for a standard bulk B2B wholesale order?

• Export casing structure. Components are packed inside ISPM-15 fumigated plywood crates layered with internal bubble wrap and anti-rust paper insulation.

• Volumetric batch densities. Individual crates secure 100 to 200 square blocks based on nominal thicknesses to shield the edges during maritime transit.

• Logistical weight limits. Gross case weight is capped between 25kg and 40kg per box for safe automated forklift handling and on-site warehouse warehousing.

Q5: What is the production lead time for customized non-standard square blades if we submit custom blueprints?

• Standard stock shipment. Standard dimensions (83×83×26mm, 90×90×26mm, 100×100×30mm) are shipped within 48 hours from current warehouse inventory.

• Bespoke manufacturing cycles. Formulations requiring unique bolt spacing, custom thicknesses, or specific alloy tempers undergo vacuum heat treatment within 10 to 15 business days.

• Lead time dependency. The 10–15 days constraint is a fixed metallurgical requirement to execute the multi-stage gas quenching and tempering cycles safely.

Q6: Why must movable and stationary GQ Rebar Cutting Machine Blades always be replaced in identical pairs?

• Prevention of parallel misalignment. Running a new block against a deformed face shifts the shear line, forcing high local stress concentrations onto the newly installed cutting edge.

• Protection of primary mechanical drives. Asymmetric cutting faces amplify kinetic vibration, accelerating structural fatigue inside hydraulic ram cylinders and main gear shafts.

• Symmetrical wear distribution. Rotating or replacing both components simultaneously ensures structural stability and limits total dimensional deviation to ≤ 0.05 mm.