TMT Bar Cutting Blade / TMT Rod Cutter Knives / Sariya Cutting Blade

Maximizing Throughput in Construction: High-Performance TMT & Rebar Cutter Blades

1. Key Cutting Challenges

• Abrasive wear: Rust and surface scale act like sandpaper to wear down blade edges

• Impact damage: Hard ribbed bars create uneven force, causing cracks and chipping

2. Blade Material Selection

H13 Hot Work Steel

• Chemical makeup:

• Carbon: 0.32–0.45%

• Chromium: 4.75–5.50%

• Molybdenum: 1.10–1.75%

• Silicon, Manganese, Vanadium: Balanced trace levels

• Low sulfur & phosphorus, iron as base metal

• Core benefits:

• Balanced strength and toughness to stop edge chipping

• Strong heat resistance and anti-crack performance

• Hardness: HRC 50–55

• Best for:

• High-impact continuous cutting

• Thick rebar, high-strength ribbed rebar

• Hot rolled rebar and high-speed production lines

• Indian Fe 500 / Fe 550 TMT bars

Cr12MoV Cold Work Steel

• Chemical makeup: High carbon + high chromium, plus molybdenum and vanadium

• Core benefits:

• Hardness: HRC 61–64

• Extreme wear resistance and long edge life

• Strong compression and bending strength

• Best for:

• Hard cold-rolled rebar cutting

• Continuous low-impact cutting tasks

• Note: Lower toughness; avoid large gaps and heavy impact work

9CrSi Alloy Steel

• Core benefits: Low cost, easy processing and stable basic performance

• Best for: Ordinary low–medium strength round steel and light rebar cutting

• Ideal for: Small projects with tight budget limits

3. Equipment & Size Matching

• Square blades: 4 usable cutting edges, rotatable design, longer service life, for large output yards

• Rectangular blades: Single or double edge, simple structure, for small tonnage cutters

• Size standard: Follow machine manual data for GQ40, GQ50, GQ60 and other common models (thickness, length, width, hole spacing)

• Wide compatibility: Fits Chinese, German, Italian and Indian local rebar cutting machines

4. Blade Choice by Material Type

• Ordinary round steel: Use 9CrSi or Cr12MoV to save cost

• High-strength ribbed rebar / HRB500E: Use H13 for anti-chip and impact resistance

• India TMT bar (Fe 500 / Fe 550): Use H13 to cut hard outer layer with stable performance

5. Production Process Advantage

• Full precision grinding for smooth, sharp edges

• Vacuum heat treatment for even hardness inside and outside

• Less internal stress, not easy to dull, crack or deform

• Optimized hardening depth to solve brittle fracture on high-strength metal

6. Custom Blade Service

• Custom size: Length, width, thickness and bolt holes per drawing

• Optional material: 9CrSi, Cr12MoV, H13

• Custom design based on rebar diameter and strength grade

• Full CNC equipment for accurate 1:1 custom parts

7. Daily Blade Maintenance Tips

• Rotate the blade regularly: 4-edge / 8-edge design lets you switch sides when one edge wears

• Tighten mounting bolts: Loose parts cause heavy impact and fast damage

• Control blade gap: Keep gap at ~10% of rebar diameter for smooth cutting

• Use sharp blades to reduce motor and hydraulic system load

8. Why Quality Blades Matter

• Less downtime: Stable cutting avoids frequent stops for blade replacement

• Lower cost per cut: Multi-edge design extends total service life

• Less machine repair: Smooth cutting reduces vibration and equipment wear

• Steady output: Suitable for peak construction seasons, hot weather and rainy seasons in India

• Clean cutting effect: Neat cuts for building sites

9. Quick FAQ

• Main blade materials: 9CrSi (economy), Cr12MoV (wear resistant), H13 (high toughness)

• Blade chipping cause: Low-toughness material, wrong blade gap, poor heat treatment

• For thick & high-strength rebar: Choose H13 as the top option

• Custom order support: Yes, send drawings, material needs and rebar specs

• Longer blade life: Rotate edges, fix bolts and adjust cutting gap correctly