Asphalt Mixing Plant Spiral / Paddle Blade (Hot-Mix Conveying)
Asphalt Mixing Plant
Asphalt mixing plant spiral blade in high-chrome alloy - conveys and folds hot mix along the shaft for even bitumen coating; bolt-on, wear-resistant.
- ■Material: High-chromium alloy cast iron
- ■Application: Conveying & folding hot mix, bitumen coating
■ ISO 9001:2015 Certified
■ Lost-Foam Cast
■ HB 600+ Wear Hardness
■ Ships to 50+ Countries
[ Engineering Reference ]
Decisive Specifications
| Material | High-chromium alloy cast iron |
|---|---|
| Hardness | HB 600-700 |
| Process | Lost foam casting, bolt-on mounting |
| Application | Conveying & folding hot mix, bitumen coating |
| OEM Fit | Ammann, Marini, Benninghoven, MEKA, Astec, generic pugmill |
■ All values verified via CMM inspection · ISO 9001:2015
[ Grade Selection ]
Choosing the Right Grade
This is a hard-iron wear face (HB 600+). The right grade depends on your aggregate and output — harder, more abrasive aggregate justifies a higher-carbide grade:
Not sure which grade fits your plant? Send your aggregate type, output and plant model and we recommend the grade with your quote.
[ Available Grades / Variants ]
Available Grades & Variants
This part ships in several cast grades. Send your output, aggregate hardness and plant model and we match the grade — or cast to your exact OEM specification.
[ RFQ Prompt ]
Need a Specific Size or OEM Replacement?
Don't see your exact specs? Send us a blueprint, a worn sample, or just your machine model. Our team will review the details and provide a tailored quotation.
[ OEM Compatibility ]
Compatible Mixing Plant Brands
® Registered trademarks are property of their respective owners.
[ Technical Audit ]
Engineering Advantages
Even Conveying & Coating
A correct spiral pitch and profile keep hot aggregate moving and folding through the bitumen, eliminating the dead zones that leave stones uncoated and push a batch off-spec.
Hot-Service High-Chrome
High-chromium alloy iron above HB 600 holds its edge against sharp aggregate at mixing temperature, so the conveying profile lasts instead of rounding off mid-season. Bolt-on mounting keeps changes quick.
Bolt-On, Weld-Free Change
The spiral mounts bolt-on for fast maintenance with no welding or hot-work permit, and the pitch and bolt pattern are matched to your shaft so it drops straight on.
Spiral blades are the conveying and mixing tool of the pugmill. Pitched along the shaft, they push hot aggregate from one end of the chamber to the other while folding it back through the bitumen, so every stone is fully and evenly coated before discharge.
When the spiral profile wears down, that conveying action weakens: material lingers, dead zones form, and aggregate leaves the mixer unevenly coated or segregated - off-spec hot mix that fails at the lab or, worse, on the road. Because the blade controls both throughput and coating quality, a worn spiral quietly costs both rate and product quality at once.
Sureay spiral blades are cast in high-chromium alloy iron above HB 600 to resist abrasion at mixing temperature, with a bolt-on mount for fast, weld-free changes. They fit pugmill and twin-shaft plants from Ammann, Marini, Benninghoven, MEKA and Astec, and typically last 6-18 months depending on output and aggregate hardness.
[ How to Order ]
Made to fit your plant — from a sample or a model
Every part is cast to order. There is no catalogue number to look up — we reverse-engineer the fit from your worn part or plant model, so you get an exact replacement rather than a near-miss.
Send your part or model
Email a photo of the worn part, its key dimensions, or your plant make and model. If you can ship the worn part it becomes the master pattern for an exact copy.
We measure & match
Our team reverse-engineers the geometry, bolt pattern and profile, and recommends the grade for your aggregate, output and temperature.
Confirm the quote
You approve dimensions, grade, price, MOQ and lead time before anything is cast — no surprises.
Cast, inspect & ship
We cast on our lost-foam / DISA lines, run a dimensional and hardness check, and ship factory-direct to 50+ countries. A material and hardness report can travel with the order.
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[ Knowledge Base ]
Product FAQs & Buying Guidance
Technical FAQs
01How long do asphalt mixer spiral blades last?+−
Typically 6-18 months, with high-output plants and hard, abrasive aggregate at the shorter end. The clearest sign of a worn spiral is falling mixing efficiency - longer cycle times, dead zones in the chamber, or aggregate leaving the mixer unevenly coated.
02What happens to hot mix quality when spiral blades wear out?+−
As the spiral profile rounds off, conveying and folding weaken, so material lingers and aggregate is no longer fully coated with bitumen. The result is uneven or segregated hot mix that can fail specification. Renewing the blades restores both throughput and coating consistency.
03Which asphalt mixing plants do your spiral blades fit?+−
Spiral and paddle blades are supplied for pugmill and twin-shaft plants from Ammann, Marini, Benninghoven, MEKA and Astec, plus generic pugmills. We match the pitch and mount to your shaft; blades for other plants can be copied from a worn sample.
04What material are asphalt spiral blades made of?+−
Spiral blades are cast in high-chromium alloy iron above HB 600 to hold their conveying edge against sharp aggregate at mixing temperature, so the spiral profile lasts instead of rounding off mid-season.
05Are your asphalt spiral blades bolt-on replacements?+−
Yes - they mount bolt-on for fast, weld-free changes during routine maintenance. Send the plant model or a worn blade and we match the pitch, profile and bolt pattern so they drop straight onto your shaft.
06Can you supply asphalt spiral blades to a sample or drawing?+−
Yes, OEM/ODM is welcome. A worn blade or a dimensioned drawing lets us reproduce the correct spiral pitch and profile - the geometry that controls both throughput and how evenly the hot mix is coated.
Why Choose Sureay
01Is Sureay a direct manufacturer or a trading company?+−
We are a direct factory. Most mixer wear parts are cast and machined in-house on our lost-foam and DISA green-sand lines, while sealing components are precision-molded - either way you deal with the people who actually make the parts and skip the trading-company markup.
02Can you supply parts to fit a specific OEM mixer model?+−
Yes. Send the plant make and model, or a photo and key dimensions of the worn part, and we match the casting and bolt pattern. We supply OEM-fit replacement wear parts for the major concrete and asphalt plant brands and welcome OEM/ODM work.
03Are you ISO certified and do you ship internationally?+−
Sureay is ISO 9001:2015 certified and ships factory-direct to over 50 countries. Each order can include a material and hardness report on request.
Reach Our Team
Get in Touch with Our Engineers
Contact Our Team
Discuss your requirements directly with our engineers.
Request a Quote
Our engineering team responds within 24 hours.
Sureay manufactures replacement wear parts to fit the listed OEM machines and is not affiliated with these manufacturers. All brand names and trademarks are the property of their respective owners.