ALAS Industrial Shredder Blades & Custom Tools | Complete Solutions for Single and Double Shaft Shredders
ALAS supplies high-performance industrial shredder blades and custom cutting tools, compatible with all single and double shaft shredder models. As the key cutting part of the machine, blade quality directly affects shredding performance, finished output and overall equipment lifespan. Choose ALAS, and you will achieve stable, efficient production as well as long-term economic benefits.
Core Advantages
Less downtime: Blades are forged from premium alloy steel and processed with precise heat treatment to avoid unexpected breakdowns. Lower running costs: Each blade can be reground up to four times, cutting replacement frequency by more than 50%. Higher working efficiency: The optimized cutting edge design reduces power consumption by 15% to 30% compared with standard blades. Versatile for diverse materials: We deliver tailored solutions for steel wire tires, mixed metal scraps, electronic waste, household waste and other materials. Quick-change modular structure for double shaft shredders: Only damaged parts need to be replaced, slashing maintenance time by 60%.
1. Blade Material & Performance Chart
| Steel Grade | Hardness | Wear Resistance | Toughness (Impact Resistance) | Machining & Quenching Properties | Application Scenarios | ALAS Recommended Model |
| H13 | HRC 48–52 | Medium | ★★★★★ Excellent | Works steadily under high temperatures and features strong hardenability | Heavy impact jobs: steel wire tires, mixed metal, automotive shells, thick steel plates | ALAS‑H13 Heavy Duty |
| DC53 | HRC 62–63(Tempered at 520-530℃) | Excellent. Fine and even carbide grains deliver better wear resistance than D2 and SKD11 | ★★★★★ Excellent. Resistance to edge chipping is twice that of SKD11 | Low retained austenite after high-temperature tempering, minor residual stress after wire cutting, reliable dimensional stability | Mixed waste, PVC, rubber, light metal and steel wire tires. Ideal for jobs requiring both toughness and wear resistance | ALAS‑DC53 All-Round |
| D2 | HRC 58–62 | Good. Rich carbide grains ensure solid wear resistance, while toughness is limited | ★★☆☆☆ Average. Large carbide grains may lead to brittle fracture | Minimal deformation after quenching, relatively hard to machine | Filled hard plastics and regular hard materials for low-impact, wear-focused working conditions | ALAS‑D2 Precision Plastic Blade |
| SKD‑11 | HRC 58–61 | Fair. Even internal structure, slightly less wear-resistant than D2 | ★★★☆☆ Moderate. Tougher than D2 but still prone to brittleness | Easy to machine and maintains stable dimensions after heat treatment | Medium hard steel scraps, copper, aluminum and steel wire tires for continuous production under medium impact | ALAS‑SKD11 Wear-Resistant Economy Series |
| ZGMn13 High Manganese Steel | ≥HRC 45 (Work-hardened) | Good. Surface hardens quickly under impact | ★★★★☆ Very Good | Requires solution treatment after forging and casting, difficult to machine | Household waste, construction waste and stone-mixed materials under heavy impact | ALAS‑Mn13 Waste Disposal Series |
| 9CrSi | HRC 58–62 | Medium | ★★★☆☆ Moderate | Good hardenability and easy to grind | Rubber, waste paper, fiber and other soft materials. Cost-effective option | ALAS‑9CrSi Soft Material Blade |
| YG8 Tungsten Carbide Insert | ≥HRA 89 | Ultra wear-resistant. Service life is 5 to 7 times longer than regular steel | ★★★☆☆ Moderate | Can only be processed via EDM and diamond grinding, not conventional cutting | 24/7 heavy-duty and high-wear working conditions. Premium choice for long-term use | ALAS‑YG8 Ultra Wear-Resistant Series |
On-site test results: DC53 outperforms D2 and SKD11 in overall wear resistance. When shredding stone-contained plastics, YG8 tungsten carbide insert blades last 5 to 7 times longer than standard D2 blades.
2. Frequently Asked Questions
1. What materials are used for ALAS shredder blades?
| Blade Steel Grade | Hardness | Performance & Application |
| D2 | HRC 58-62 | Solid wear resistance with average toughness. Suitable for pure hard plastics and low-impact materials. |
| DC53 (tempered) | HRC 62-63 | Great toughness and wear resistance. Edge chipping resistance is twice that of SKD11. Widely used for waste tires, electronic waste, copper wires and various mixed scraps. |
| SKD11 / Cr12MoV | HRC 58-61 | Balanced performance and good value for money. Fits wood, hard plastics and metal scraps under medium impact. |
| H13 | HRC 48-52 | Strong impact and fatigue resistance. A heavy-duty material for mixed metal, automotive shells, thick steel plates and whole waste tires under severe impact. |
| ZGMn13 High Manganese Steel | ≥HRC 45 (Work-hardened) | Features work-hardening property. Perfect for household and construction waste mixed with stones under heavy impact. |
| 9CrSi / 42CrMo | HRC 58-62 | Budget steel grade for intermittent light-duty processing of rubber, paper and fiber materials. |
| YG8 Tungsten Carbide Insert | HRA≥89 | Extremely hard and wear-resistant, 5 to 7 times the service life of common alloy steel. Ideal for 24-hour continuous processing of highly abrasive stone-mixed materials. |
2. How to choose the right blade material?
There is no single material that suits all applications. You can make your choice according to processed materials, impact load and daily running hours.
DC53 (All-Round Grade): Works well for most working scenarios. Resists cracking and chipping with balanced toughness and wear resistance.
D2 / Cr12MoV / SKD11: Cost-effective options for pure plastics, wood and light mixed scraps.
H13 (Heavy Duty Grade): Designed for thick metal, auto parts and whole waste tires under heavy impact.
YG8 Tungsten Carbide Insert: First pick for highly abrasive, stone-mixed materials with the longest service life.
9CrSi / 42CrMo: Budget choice for intermittent light-duty production.
Note: Blades with excessive hardness have poor toughness and may break under strong impact.
3. Quick Material Selection Guide by Processed Material
Plastics & wood: Cr12MoV / D2
Waste tires & elastic materials: DC53 as priority, H13 as alternative
Stone-mixed materials: High manganese steel / YG8 tungsten carbide blades
Heavy industrial metal scraps & automotive shells: ALAS-H13 forged blades
Household waste & construction waste: ZGMn13 high manganese steel
Electronic waste (circuit boards): SKD11 / DC53 double shaft fine-tooth blades
4. What is the standard service life of ALAS shredder blades?
Calculated based on 8 to 12 hours of daily operation with proper blade gaps and feeding work:
Economy grade steel (9CrSi/42CrMo): 10-30 days
Mid-to-high end alloy steel (D2/SKD11/DC53): 40-120 days
H13 heavy-duty forged blades (for metal and tire processing): 90-180 days
YG8 tungsten carbide insert blades: 6-12 months of continuous use
The actual service life is affected by steel type, impurity content in raw materials, blade gaps and equipment overload frequency.
5. When to sharpen or replace shredder blades?
Sharpen blades in time: Uneven output particle size, excessive powder output, reduced shredding speed, frequent material jams and abnormal current fluctuation. Replace blades directly: Blades with cracks or chipped edges, or blades reaching the maximum grinding limit. ALAS alloy steel blades can be reground up to four times.
6. What causes blade edge chipping and breakage?
Hard foreign substances such as bolts, nails, iron blocks and stones mixed in raw materials.
Selected blade material does not match actual impact conditions.
Unqualified heat treatment and cryogenic treatment reduce blade toughness.
Improper blade gap setting and long-term overfeeding.
Solutions: Install a metal detector at the feeding inlet. Choose ALAS blades matching your working conditions and set blade gaps strictly as required.
7. Recommended blade sharpening cycle
Light-duty processing (plastics/wood): Sharpen every 20 to 40 working hours
Medium-duty processing (waste tires / mixed household waste): Sharpen every 10 to 20 working hours
Heavy-duty processing (metal / highly abrasive materials): Sharpen every 5 to 10 working hours
It is advised to prepare spare blades to avoid production halt during maintenance.
8. Standard installation gaps for single and double shaft shredder blades
Single Shaft Shredder
Double Shaft Shredder
Tips: Too narrow gaps will lead to blade overheating and accelerated wear. Too wide gaps will weaken cutting performance. Calibrate blade gaps every week. ALAS blades are finished within a grinding tolerance of ±0.01 mm to ensure precise gaps and even output.
9. Structural differences between single shaft and double shaft blades
Single shaft blades: Square one-piece structure with four usable cutting edges, mainly used for fine shredding of light materials. Common sizes: 35×35×25mm / 40×40×25mm / 80×80×30mm.
Double shaft blades: Claw-type modular structure with strong material grabbing capacity. 2-tooth and 3-tooth blades for coarse shredding; 6-tooth, 8-tooth and 12-tooth blades for fine shredding. Equipped with ALAS quick-change modules to cut maintenance time by 60%.
10. How to extend the service life of ALAS blades?
Control feeding volume and avoid long-term equipment overload.
Remove stones, metal pieces and other hard impurities from raw materials before processing.
Keep blade gaps within standard range and conduct weekly calibration.
Apply special lubricant to reduce friction during cutting.
Stop the machine for cooling after long hours of continuous operation.
Coat spare blades with anti-rust oil and store them properly.
Rotate blades every 40 to 80 working hours to use all cutting edges evenly.
11. Does ALAS provide custom blade service?
We offer full customization for non-standard blades. Products can be manufactured according to customer drawings or original samples. Available materials include D2, DC53, H13, SKD11, high manganese steel, bimetallic composite steel and YG8 tungsten carbide. Blade hardness can be adjusted from HRC54 to HRC64. Tooth quantity, thickness, mounting holes and other parameters are all customizable.
Please provide your equipment model, processed materials and daily output. Our technical team will send you the quotation and 3D confirmation drawing within 24 hours.
12. Troubleshooting for common shredder faults
Material jam: Cut off the main power supply, clear blocked materials and take out hard foreign substances inside the machine.
Abnormal running noise: Fasten loose bolts and check bearing lubrication and wear condition.
Uneven output particles: Replace worn blades and readjust blade gaps to standard values.
Equipment overheating: Slow down feeding speed, refill lubricant and check blade friction gaps.
13. Safety notes for blade disassembly and maintenance
Cut off and lock the main power before any disassembly or maintenance work.
Wear complete protective gear including cut-resistant gloves, safety goggles and safety shoes.
Do not let skin come into direct contact with sharp cutting edges.
Check spare blades for hidden cracks before installation.
Fasten bolts with standard torque to prevent blade displacement during operation.
3. Step-by-Step Daily Blade Maintenance Guide
Maintenance target: Extend blade service life and ensure 24-hour stable equipment operation.
Daily Pre-Start Inspection
Check blades and counter blades for cracks and chipped edges, and clear tangled debris. Rotate the main shaft manually to check for abnormal friction noise.
Regular Blade Rotation & Replacement
Rotate single shaft blades every 40 to 80 working hours based on material wear. For double shaft shredders with quick-change structure, replace damaged modules directly. DC53 and SKD‑11 blades can use four cutting edges alternately.
Periodic Gap Calibration
Use a feeler gauge to measure blade gaps every week. The standard gap is 0.3–0.8mm for single shaft shredders and 0.5–1.5mm for double shaft shredders. ALAS blades are finished within ±0.01mm grinding tolerance to guarantee precise gaps and even output.
Bolt Torque Management
Fasten bolts with specified torque. For M20 bolts, the standard torque is 450–550N·m. Retighten bolts two hours after machine startup to prevent loosening caused by thermal expansion and contraction.
Cleaning & Anti-Rust Care
Clean materials attached or tangled on shafts and blades after each working shift. Spray anti-rust oil on H13, DC53 and other blades after processing wet or corrosive materials.
4. Quality Standards & Certifications
The whole production process of ALAS shredder blades, including forging, heat treatment and CNC precision grinding, strictly follows two international standards:
Every batch of products is delivered with material certificates, multi-point Rockwell hardness test reports and metallographic analysis documents.
5. Material Selection Q&A
Q: For plastic film processing, which ALAS single shaft blade is better, 35mm or 40mm?
A: Choose 35×35×25mm ALAS‑D2 blades for low-power machines requiring 20–25mm output size. Select 40×40×25mm ALAS‑DC53 blades for general 25–40mm output and higher working efficiency. Plastic film is easy to tangle around equipment. Smaller blades achieve finer cutting. DC53 blades feature better toughness and wear resistance to withstand lateral force caused by tangling and serve longer.
Q: Why choose ALAS high manganese steel double shaft blades for construction waste instead of SKD‑11?
A: Construction waste contains plenty of stones and concrete blocks, which bring heavy impact load. SKD‑11 does not have enough toughness and is easy to chip under strong impact. ZGMn13 high manganese steel hardens quickly on the surface under impact, with hardness rising from HB200 to over HRC45, while the inner part remains highly tough. It becomes more wear-resistant under impact, making it the ideal choice for such working conditions.
Q: Can ALAS quick-change modular design really save 60% of maintenance time?
A: This has been verified by on-site tests. Replacing traditional one-piece blades requires disassembling the whole rotor, which takes 4 to 6 hours. With ALAS modular blades, you only need to loosen clamp bolts and replace damaged blade segments. The work can be finished within 1.5 hours, and no gap recalibration is needed. 
7.1 How to get a quotation for custom blades?
Provide the following information, and our technicians will work out solutions and quotations within 24 hours:
Equipment model, or drawings of main shaft and mounting dimensions
2 to 3 clear photos of existing blades and rotors
Processed material type, output requirements and daily processing capacity
7.2 Quick Selection Table
| Material Type | ALAS Blade Recommendation (Priority) |
| Steel wire tires / Mixed metal | H13 > DC53 > SKD‑11; YG8 tungsten carbide inserts for high-budget projects |
| Hard plastics / Wood | DC53 / D2; DC53 is preferred for large-size single shaft blades |
| Rubber / Waste paper / Fiber materials | 9CrSi for cost control; DC53 for longer service life |
| Household waste / Construction waste | ZGMn13 High Manganese Steel / H13 |
| Electronic waste (circuit boards, etc.) | SKD11 / DC53 double shaft 12-tooth fine blades |
7.3 Solutions for Different Budgets
High-end solution: ALAS‑YG8 tungsten carbide insert blades. Extra-long service life for 24/7 continuous heavy-duty production.Cost-effective solution: ALAS‑6CrW2Si blades. Suitable for conventional metal and tire shredding with lower overall operating costs.
8. Summary
ALAS industrial shredder blades and custom cutting tools are core parts to keep waste recycling lines stable, efficient and cost-saving. Our full product range covers all kinds of industrial waste processing applications, including general 40×40mm D2/DC53 single shaft blades, heavy-duty H13 and high manganese steel double shaft blades for high-impact jobs, and ultra wear-resistant YG8 tungsten carbide insert blades.
Feel free to contact ALAS with your equipment parameters and material information. We will customize exclusive blade solutions and provide 3D confirmation drawings. Blade trial service and on-site technical guidance are also available.
To get factory-direct wholesale pricing, you can consult our experienced team as a trusted industrial shredder blades supplier today.
