Anhui Huihuang Chain Transmission Co., Ltd. is one of the leading manufacturers and suppliers of a type steel agricultural chains in China, featured by quality products and good service. If you're going to wholesale advanced a type steel agricultural chains made in China, welcome to get pricelist and free sample from our factory. We also accept customized orders.
A-Type Steel Agricultural Roller Chains & Attachments
Heavy-Duty Short-Pitch Agricultural Chains Engineered for High-Load Drive System
Custom-engineered to DIN 8188 / ISO 487 standards. Optimized with shot-peening and precision pre-stretching to reduce pitch elongation and maximize service life in harsh farming environments.
Standards: ISO 487 / DIN 8188 / ANSI Compliant
Pitch Range: Short-pitch precision driving & conveying (38.1mm – 41.4mm / A550, A555, A557, A620, etc.)
Processing: Shot Peened / Heat Treated / Pre-stretched
OEM Compatibility: Direct replacement for John Deere, New Holland, Case IH, and Claas machinery
Standard A-Type Agricultural Chain Models & Pitch Specifications
To help you find the exact fit for your farm machinery, we supply a complete range of standard A-Type short-pitch steel agricultural chains and specialized attachments (A1, K1, C1E, etc.).
| Model / Chain No. | Pitch (p) | Inner Width (b1) | Roller Dia. (d1) | Pin Dia. (d2) | Tensile Strength (Min) | Matching OEM Equipment |
| A550 | 41.40 mm (1.630 in) | 22.23 mm | 16.66 mm | 7.19 mm | 50.0 kN | Combine Harvesters, Grain Elevators |
| A555 | 41.40 mm (1.630 in) | 12.70 mm | 15.24 mm | 5.08 mm | 28.0 kN | Balers, Feed Mixers, Rakes |
| A557 | 41.40 mm (1.630 in) | 22.23 mm | 17.78 mm | 8.28 mm | 60.0 kN | Heavy-Duty Grain Conveyors, Headers |
| A620 | 41.40 mm (1.630 in) | 25.40 mm | 17.78 mm | 8.28 mm | 68.0 kN | Forage Harvesters, Corn Headers |
A-Type vs. CA-Type Chains Comparison
What Differences Exist Between A-Type and CA-Type Agricultural Chains?
For machine uptime, choosing the right agricultural roller chain is essential. Although both A-Type and CA-Type steel agricultural chains are made for farm equipment, their functions are essentially different:
| AGRICULTURAL STEEL CHAINS |
|
A-Type (Short Pitch) ·Compact Sprockets & Tight Spaces ·High Load / Low-to-Medium Speed Drives ·Higher Fatigue Resistance & Stiffness
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CA-Type (Long Pitch) ·Extended Conveying Lines ·Open Spacing / Debris Resistance ·Lightweight Conveying Applications
|
1. Pitch Length & Geometry
A-Type Chains (Short Pitch): have smaller pitch lengths in relation to inner width, usually between 38.1 and 41.4 mm. Smoother engagement with smaller sprockets, increased drive efficiency, and increased fatigue resistance under frequent stop-and-go heavy loads are all made possible by this short-pitch design.
CA-Type Chains (Long Pitch): Extended pitch lengths are a feature (often twice as long as A-Type). They are mostly intended for long-distance transportation where a lower weight per foot is necessary.
2. Operational Applications & Speeds
A-Type Chains: Ideal for heavy-duty elevation and high-torque power transmission where there is limited room around sprockets (e.g., feeder house drives, primary combine header drives).
CA-Type Chains: Perfect for long-distance, slow-speed material handling when low chain weight and excellent debris tolerance are more important than high tensile driving power.
Harsh Working Conditions & Technical Advantages
Engineered for Extreme Farming Conditions: Our Manufacturing Advantages
Dust, dirt, extreme humidity, and ongoing seasonal stress are all conditions under which agricultural machinery functions. Pitch elongation and fatigue cracking cause standard chains to break too soon. With certain heat treatments and surface engineering, our A-Type Steel Agricultural Chains can last up to 30% longer:
Key Technical Enhancements:
Shot Peening : Every plate, roller, and pin is shot peened at a high speed. By creating compressive residual surface stress, this procedure significantly increases resistance to fatigue failure brought on by shock loads during intensive harvesting operations.
Precision Pre-Stretching & Pre-Loading : Up to 30% of the chains' ultimate tensile strength is pre-loaded at the production. By doing this, initial "break-in" elongation is eliminated, reducing maintenance downtime and averting chain sag during the busiest harvest seasons.
Carburized Alloy Steel Pins & Solid Rollers :uses deep case-hardened high alloy steels. The ductile core absorbs significant impacts without breaking, while the hard outer layer withstands abrasion from dirt, grain dust, and crop residue.
Anti-Corrosion Surface Coatings: To endure outside exposure, liquid fertilizers, and humid weather, optional zinc-plated, nickel-plated, or Dacromet surface treatments are offered.
Primary Field Applications of A-Type Chains
Designed for versatile performance across agricultural machinery systems:
1 Grain & Combine Harvesters: Feeder house drives, clean grain elevators, tailing elevators, header drives.
2 Balers & Hay Equipment: Main drive mechanisms in round and square balers, pick-up reels, tedders.
3 Corn Heads & Forage Equipment: Gathering drives, snapping roll chains, cutter bar transmissions.
4 Spreaders & Mixers: Manure spreader floor conveyors, TMR feed mixers, fertilizer application equipment.
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