Seeding & Planting Components

Heavy-Duty Planter Double-Disc Seed Opener Blade & Sealed Hub Assembly (15" x 3.5mm)

Precision-ground boron steel no-till seed opener disc with pre-riveted double-row triple-lip bearing

Engineering & Metallurgy Overview

Engineered to carve a crisp, uniform True-V seed trench in tough no-till corn stalks and heavy clay without blade flex. Factory-assembled with a heavy-duty double-row angular contact bearing, triple-lip nitrile mud seal, and heavy stamped steel dust cap for rapid pre-season planter row-unit overhauls.

OEM Reference #
AA65248AA55927AA3747487495784404-121D
Material / Metallurgy3.5mm 30MnB5 Boron Alloy Blade + Double-Row GCr15 Sealed Bearing (5203KYY2)
Hardness ProfileBlade HRC 50-54 / Bearing HRC 61-65
Surface FinishPrecision Ground Single/Double Bevel + Clear Rust-Preventive Coat
Minimum Order (MOQ)150 PCS
Production Lead Time12-18 Days
Factory Part No.SED-OPN-AA65
Instant RFQ Quote
🛡️ 12-Month Quality Guarantee📦 ISPM-15 Export Wooden Crate🚢 Mixed Container Consolidation
ISO 9001:2015 QC VERIFIEDNo-Till 3.5mm
BORON STEEL 30MnB5
3D STEP / 2D DWG / PDF Available
100% CMM Toleranced

Key Manufacturing Highlights

  • Upgraded 3.5 mm heavy-duty boron blade prevents edge rolling compared to standard 3.0 mm discs
  • Axial and radial runout controlled within ≤0.4 mm for consistent blade-to-blade leading contact
  • Pre-riveted 5203KYY2 / DAC164044 double-row bearing eliminates single-row preload play
  • Matched zero-lip natural rubber gauge wheel assemblies available for consolidated container orders

Technical & Metallurgical Specifications

Disc Diameter & Gauge381 mm (15.0") x 3.5 mm Heavy Duty (13.5" & 14" also stocked)
Installed Bearing5203KYY2 Double-Row Angular Contact, Triple-Lip Sealed
Rivet Construction6x Heavy Cold-Formed Grade 8.8 Flush Rivets
Bevel Profile12° Precision Ground Single Bevel
Packaging6 pcs per reinforced carton / 180 pcs per fumigated pallet
Unit Weight3.45 kg
Hardness RangeBlade HRC 50-54 / Bearing HRC 61-65
Quality Inspection StandardISO 9001:2015 · EN 10204 3.1 Spectrometer & 100% CMM Dimensional Check

Verified Equipment Fitment & Cross-Reference Applications

  • John Deere 7000, 7200, 1700, 1770NT, DB Series MaxEmerge XP / 5 / ExactEmerge
  • Kinze 3000, 3600, 4900 Series Row-Crop Planters
  • Case IH Early Riser 1200 / 2150 Planter Row Units
  • Great Plains Yield-Pro / Solid Stand & Horsch Maestro / Pronto

OEM part numbers (AA65248, AA55927, AA37474, 87495784, 404-121D) and brand names are referenced solely to verify dimensional interchangeability. Need custom bore, bolt pattern, or private-label laser marking? Explore our OEM Custom Tooling capabilities →

Export Protective Packaging & Global Shipping

Anti-Corrosion Sea-Freight Packaging

Every batch is treated with VCI vapor corrosion inhibitor oil, sealed inside anti-humidity polyethylene barrier bags, and palletized in fumigated ISPM-15 solid plywood crates with distributor barcode labels.

Incoterms & Container Consolidation

We ship FOB Qingdao / Shanghai / Ningbo, CIF major agricultural import ports, and DDP door-to-warehouse. Combine chopper knives, bearings, tillage blades, and PTO parts in a single mixed 20GP/40HQ container.

DIRECT FACTORY OEM/ODM|24-HOUR DFM & TOOLING ESTIMATE

Need Custom Agricultural Parts or Custom Casting / Forging Tooling?

Send us your CAD 2D/3D drawings (.step, .dwg, .pdf) or OEM sample specifications. Our engineering team provides detailed quotation and DFM analysis within 24 hours.

Strict NDA Confidentiality
Tooling & Sample in 15-20 Days
Full EN 10204 3.1 Material Test Reports
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