FAQ – Rebar Cutter Blades & Cutting Blocks
Q1: What blade materials do you provide?
We supply three practical blade materials to suit different site conditions and budget needs:
9CrSi: A cost-effective option. It works well for regular low and medium strength rebar, ideal for small and medium construction projects.
Cr12MoV: Heavy wear-resistant material. It lasts 2 to 3 times longer than 9CrSi, perfect for continuous cutting of standard high-strength rebar.
H13: Features great toughness and heat resistance. It rarely chips or breaks, making it ideal for high-speed cutting lines, hot-rolled rebar, thick rebar and scrap rebar processing.
Q2: Why do blades chip easily?
Blade chipping on site mostly happens due to these three reasons:
Material mismatch: Hard but brittle materials cannot withstand strong impact when cutting thick or ultra-hard rebar. Switching to H13 blades can effectively solve this problem.
Incorrect blade gap: A gap that is too wide or too narrow between upper and lower blades causes uneven force, which leads to edge chipping.
Unprofessional heat treatment: All our blades adopt vacuum heat treatment to achieve uniform hardness inside and out, which greatly lowers the chipping rate.
Q3: What’s the difference between 9CrSi and Cr12MoV?
Wear resistance: Cr12MoV wears much slower. Under the same working conditions, it delivers 2–3 times more cuts than 9CrSi.
Overall cost: 9CrSi has a lower initial purchase price. Though Cr12MoV costs slightly more upfront, it requires far fewer replacements, helping you save more on long-term operating costs.
Q4: Which material suits high-strength or thick ribbed rebar?
H13 is our top recommendation.
This material boasts excellent impact resistance and fatigue resistance. It stays stable during heavy, frequent cutting work, avoiding blade damage and unexpected project downtime.
Q5: Can you make custom non-standard blades?
Yes, we support full custom blade production with precision CNC machining.
To get an accurate custom solution, kindly provide the following details:
Complete dimension drawings (length, width, thickness, hole size and position)
Custom material requirements (9CrSi / Cr12MoV / H13)
Specifications of processed rebar (diameter and strength grade)
Q6: How to extend blade service life?
Rotate blades regularly: Most of our blades have 4 to 8 usable edges. Rotate the blade in time once an edge turns dull.
Fasten installation bolts: Loose blades will bear violent impact during cutting and get damaged easily.
Set a reasonable blade gap: Keep the gap at about 10% of the rebar diameter for smooth and stable cutting.
Q7: Why do standard blades break when cutting Grade 60 & 500W TMT bars?
Grade 60 and 500W TMT bars are high-strength ribbed steel materials. They produce strong instantaneous impact force during hydraulic cutting.
Ordinary standard blades lack sufficient toughness, so they are prone to chipping and cracking. Our vacuum heat-treated H13 blades can absorb continuous strong impact, keeping stable and intact when cutting TMT bars.
Q8: H13 vs Cr12MoV: Which is better for TMT bar cutting blocks?
H13 (SKD61, HRC 50–55): Offers a perfect balance of hardness and toughness. It resists chipping extremely well, ideal for high-speed production lines and thick ribbed TMT bars.
Cr12MoV (SKD11, HRC 61–64): Features ultra-high wear resistance for ordinary steel cutting. However, it is relatively brittle and easy to crack under continuous heavy impact.
Q9: How does 4-sided blade design save project cost?
Our square TMT bar cutting blocks are designed with four usable cutting edges, effectively quadrupling the blade’s service life.
When one edge wears out, workers only need to loosen the bolts, rotate the block 90 degrees and tighten it again to use a brand-new sharp edge. This greatly reduces replacement frequency, cutting your spending on shipping, storage and repeated procurement.
Q10: Do your blades fit GQ40 & GQ50 rebar cutters?
Yes, they fit perfectly 100%.
Our universal replacement rebar blades are manufactured by standard size and hole specifications, fully compatible with GQ40, GQ50 and GQ60 series bar croppers.
Maintaining a 10% blade gap based on rebar diameter ensures flat, clean cuts and reduces vibration damage to machine parts.
Q11: Can you customize blades according to customer technical drawings?
Absolutely. We are equipped with complete CNC grinding and machining equipment.
We can produce fully customized rebar shear blades strictly according to your technical drawings, to perfectly match your special equipment and processing needs.
