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Yancheng Longwan Machinery Co., Ltd. HOME / PRODUCTS & APPLICATION / Grey Cast Iron / Grey Cast Iron Agricultural Machinery Parts

Grey Cast Iron Agricultural Machinery Parts Foundry

Grey Cast Iron Agricultural Machinery Parts focuses on bringing together a series of key parts of agricultural machinery and equipment carefully made of grey cast iron. Grey cast iron, with its good casting performance, shock absorption, wear resistance and relatively low cost, has become one of the indispensable materials in agricultural machinery manufacturing. The products under this category widely cover the core components of agricultural machinery and equipment, such as end covers, bearing seats, etc., which are directly related to the stable operation and service life of the equipment. As a key part to protect the internal structure of the machine and seal the transmission parts, the end cover is made of grey cast iron, which can effectively resist the erosion of the external environment and the influence of internal mechanical stress, ensuring the safety and stability of the internal parts of the machine. As a key structure to support and fix the bearing, the high strength and good wear resistance of grey cast iron enable it to withstand the huge pressure and friction from the bearing, ensuring the continuous and efficient operation of agricultural machinery and equipment under harsh working conditions.

Grey Cast Iron Agricultural Machinery Parts OEM/ODM
ABOUT US
Yancheng Longwan Machinery Co., Ltd.
Yancheng Longwan Machinery Co., Ltd.
Founded in 2006, which located next to National Highway 204 in Yancheng City, Jiangsu Province, 40km from the center of Yancheng City, 5km from the center of Dongtai City, 30km from Dafeng District, and 10km from the exit of Baiju Expressway, with convenient transportation. We mainly produce various types of fire-fighting pipe fittings, reducer parts, auto parts, agricultural machinery, and industrial robot parts. Its main customers include SAIC Group, Deere, Bonfiglioli (China), Shanghai Beixu, Yaskawa Electric, etc. As a famous China Grey Cast Iron Agricultural Machinery Parts Foundry and Grey Cast Iron Agricultural Machinery Parts Suppliers, our company has a variety of molding equipment, including one vertical sand-shot horizontal parting boxless shot-press molding line with specifications of 610*510*240, 120 boxes/hour, suitable for mass production of small parts; one upper and lower sand-shot horizontal parting boxless shot-press molding line with specifications of 750*650*250, 100 boxes/hour, suitable for mass production of small and medium-sized parts; 3 sets of 1.25T medium-frequency electric furnaces; 3 cleaning shot blasting machines, and now planning a lost foam production line, suitable for 100Kg~1000Kg casting production, and planning an automatic spray painting line and an electrophoretic coating line at the same time, 3 CNC lathes and 3 lathes.
Yancheng Longwan Machinery Co., Ltd.

ODM Customization Expert

Advanced Production & Processing Equipment

Longwan Machinery has a variety of advanced domestic and foreign molding equipment, including 2 fully automatic production lines for clay sand, 1 semi-automatic production line for clay sand, and 1 coated sand production line, with an annual production capacity of 15,000 tons.

Yancheng Longwan Machinery Co., Ltd.

Complete Inspection Flow

Strict Quality Inspection

We have full-process testing equipment: spectrum analyzer, metallographic microscope, universal tensile testing machine, magnetic particle flaw detector, ultrasonic flaw detector, etc.
The above equipment can fully ensure that we can provide customers with high-precision final castings, and at the same time ensure that we meet customers' comprehensive testing requirements for physical and chemical properties of materials, non-destructive testing, high-precision geometric dimension testing, etc.

Professional Casting Expert

Comprehensive Casting Manufacturer

FAQ
  • Q
    Where are your products mainly exported to?
    A

    Our products are mainly exported to multiple countries such as Germany, Japan, Italy, South Korea, and Australia.
  • Q
    How to deliver the goods to us?
    A

    Usually, we ship by sea, which is very convenient for export.

    Of course, if the customer's goods are urgent, we can also air freight them. Ningbo Airport and Shanghai International Airport are both very close to us.
  • Q
    What's the payment term?
    A

    When quoting, we will confirm the transaction method with you.

    For mass production, we usually make a 50% advance payment in advance and then inspect and confirm the shipment before paying the remaining balance.
  • Q
    How to guarantee the quality of your goods?
    A

    Firstly, there will be corresponding inspections after each process, and for the final completed product, we will conduct a full inspection according to customer requirements and international standards;

    Then, we have advanced and complete top testing equipment in the industry: spectral analyzers, metallographic microscopes, universal tensile testing machines, magnetic particle testing machines, ultrasonic testing machines, etc.

    The above equipment can fully ensure the provision of high-precision final castings to customers, while also meeting the comprehensive testing requirements of customers for material physical and chemical properties, non-destructive testing, high-precision geometric dimension testing, and so on.
  • Q
    How many employees of your company? what about the technicists?
    A

    Our company has more than 120 employees, including 10 professional technicians and 5 engineers.
  • Q
    How about the capacity of your company?
    A

    We have 2 fully automatic clay sand production lines, 1 semi-automatic clay sand production line, and 1 coated sand production line, with an annual production capacity of 15000 tons.
  • Q
    Do you have some standard parts?
    A

    No, currently we produce and customize according to the requirements based on the drawings provided by the customer.
  • Q
    Can you do customized products?
    A

    Yes, we are mainly doing customized products according to the customers’ drawings or samples.
  • Q
    What applications do your products relate to?
    A

    Our products cover almost all the applicable equipment manufacturing and machinery manufacturing and processing fields, mainly including automotive trucks, engineering machinery, agricultural machinery, reducers, water pumps, water treatment systems, and other fields.
  • Q
    what products can you offer?
    A

    We mainly produce cast iron parts made of gray cast iron and ductile iron materials.
  • Q
    Are you a direct manufacturer or trading company?
    A

    We are a foundry and a manufacturer of cast iron parts.
  • Q
    How long can I get the feedbacks after we sent the inquiry?
    A

    We will reply to you within 24 hours of the working day.
NEWS
Grey Cast Iron Agricultural Machinery Parts Industry knowledge

Yancheng Longwan Machinery Co., Ltd. is a Grey Cast Iron Agricultural Machinery Parts manufacturer based in Caoyan Town, Dafeng District, Yancheng City, Jiangsu, China. Since 2006 we have poured agricultural and engineering castings to customer drawings and samples, alongside automotive, reducer, fire-fighting fitting and industrial robot parts.

Our work in this family centres on the load-bearing and protective iron castings inside tractors, seeders, harvesters and implement frames: end covers that seal transmission internals, bearing seats that carry shaft loads, and the housings, hubs and brackets that hold an assembly together. Serial supply has been built on OEM accounts including Deere, SAIC Group and Bonfiglioli (China), and the same route applies to every agricultural part we quote: drawing review, pattern making, sample approval, then repeat production.

What Our Agricultural Grey Iron Range Covers

Agricultural machinery asks for a material that absorbs vibration, resists abrasive soil and crop contact, machines cleanly and holds its shape over long service intervals. Grey cast iron delivers exactly that balance, which is why the flake-graphite grades remain the default choice for housings, covers and seats in this sector.

Part family Function in the machine Why grey iron fits Confirmed with you
End covers and bearing caps Seal and protect transmission internals from dust, moisture and crop residue Damping capacity and wear resistance at sealing and locating faces Wall thickness, mating-face flatness, bore concentricity, coating
Bearing seats and housings Support, locate and fix rotating shafts under continuous load High compressive strength and good sliding wear behaviour Bore tolerance, coaxiality, mounting pattern, machining allowance
Gearbox and reducer housings (see grey cast iron reducer accessories) Enclose gears, retain lubricant and hold shaft centres Castability of ribbed and cored sections plus vibration damping Core stability, oil-seal faces, pressure-tightness requirement
Pulleys, sheaves and hubs Transmit drive from engine or PTO to implements and conveyors Machinable, dimensionally stable under belt and rope contact Groove profile, runout, keyway tolerance, balance requirement
Brackets, plates and frame elements Tie guards, linkages and implements to the main structure Cast-in ribs and bosses reduce machining and welding operations Boss positions, hole patterns, straightness, edge quality
Pump and valve housings for sprayers and irrigation lines Move water, slurry or hydraulic fluid inside the implement Dense, machinable sections and stable sealing faces Casting soundness, wall thickness, hydrostatic test criteria

Grey Iron and Ductile Iron: Choosing the Right Material for the Drawing

Most agricultural parts are specified in the flake-graphite grades, commonly written EN-GJL-200 to EN-GJL-250 or HT200 and HT250 in the GB system. The graphite flakes act as internal lubricant and vibration sink, which suits covers, seats and housings that see cyclic loads but not heavy impact.

Where a part is exposed to shock, bending or thermal cycling — hitch elements, suspension arms, some axle and linkage components — the drawing normally calls for nodular material instead. We cast both families, so the ductile cast iron agricultural machinery parts range is available when a spheroidal graphite grade is specified. Grade, microstructure and hardness targets are taken from your drawing and confirmed at quotation; where the grade is still open, we review the load case with you before pattern work begins.

Material checkpoints on every heat: chemical composition by German SPECTRO direct-reading spectrometer, tensile properties on cast test bars, 3T Brinell hardness, sonic velocity for structure consistency and metallographic examination of the graphite form.

Molding Capacity and Production Scale

Boxless shot-press molding gives the dimensional consistency that agricultural OEMs expect on repeat orders, and the two lines cover different part weights. Melting is handled by three 1.25 T medium-frequency electric furnaces, with cleaning on three shot blasting machines.

Line and equipment Box size and rate Best-fit agricultural parts
Vertical sand-shot, horizontal parting, boxless shot-press molding line 610 x 510 x 240 mm, 120 boxes/hour High-volume small parts: end covers, small bearing seats, brackets, hubs
Upper and lower sand-shot, horizontal parting, boxless shot-press molding line 750 x 650 x 250 mm, 100 boxes/hour Small and medium parts: housings, larger bearing seats, pulleys
Two automatic and one semi-automatic clay sand lines Annual capacity 15,000 t Serial and mixed-batch production across the range
Coated sand production line Core and shell molding Parts with accurate internal passages and cored cavities
Lost foam line (in planning) 100 kg to 1,000 kg castings Heavier housings and frame components
Machining: 3 CNC lathes and 3 lathes Turning, boring and facing Machined bores, spigots and gasket faces

Machining, Surface Finish and Coating

Castings can be supplied as-cast and shot blasted, or machined on our CNC lathes and lathes to the datums marked on your drawing. Bore diameters, machined face flatness and mounting-hole positions are the dimensions we control most closely, because they set shaft alignment and sealing performance on the assembled machine.

  • Fettling and shot blasting on three cleaning machines before inspection.
  • Machining datum scheme agreed at sample approval, so serial parts locate the same way as the approved sample.
  • An automatic spray painting line and an electrophoretic coating line are planned to extend corrosion protection for export shipments.
  • Threaded inserts, dowel holes and masked areas can be handled if they are called out on the drawing.

Quality Control and Acceptance Testing

We operate under a complete IATF 16949:2016 system standard, which keeps process discipline identical between automotive and agricultural castings. Inspection runs through the whole route: raw material and charge checks, in-process control at molding and pouring, then full inspection of finished parts to your drawing and the applicable standard before shipment.

Testing equipment used on grey iron agricultural parts:

  • German SPECTRO direct-reading spectrometer for chemistry on every heat
  • Universal tensile testing machine for tensile strength on cast bars
  • 3T Brinell hardness tester for hardness at agreed locations
  • Sonic velocity meter and metallographic microscope for structure and graphite form
  • Magnetic particle and ultrasonic flaw detection for surface and internal soundness
  • Sand laboratory: hammer-type sample making machine, hydraulic strength tester, vibration sand screener and infrared dryer for molding sand control

Geometry is checked against the drawing with conventional metrology, and any requirement for high-precision dimensional verification, non-destructive examination or specific acceptance sampling is agreed before production starts, not after. If you prefer joint inspection, our inspectors and your representative can release the batch together at final inspection.

From Drawing to Serial Delivery

  1. Drawing or sample review and quotation. We examine the part, material callout, machining scope and volume, then quote against your confirmed requirements.
  2. Pattern and core box making. Tooling is produced to the casting process we propose, including gating and feeding design.
  3. Sample castings. Real samples are cast from the new tooling, machined where required and sent to you for approval.
  4. Serial production. Production starts after your sample confirmation, using the released drawing revision.
  5. Final inspection. Parts are inspected by our team or jointly with your inspectors, with records released against the batch.
  6. Packing and shipment. Goods are packed to the agreed specification and shipped after inspection release and your confirmation.

Information We Use to Configure Your Solution

Each quotation and casting process plan is built from the following inputs. Where an item is not yet fixed, we review it with you and propose what fits the machine function.

  • 2D drawing, 3D model or physical sample, including the revision to be manufactured
  • Material grade and the standard or internal specification it must meet
  • Estimated annual volume, batch size and call-off pattern
  • Machining scope: as-cast, shot blasted or fully machined, with datum and tolerance scheme
  • Critical dimensions, geometric tolerances and any functional gauging
  • Test and acceptance requirements, including NDT level or hydrostatic testing where relevant
  • Surface protection: paint colour and finish, or electrophoretic coating
  • Marking, traceability and packaging requirements, plus destination and delivery schedule

Serviceability, Repeat Orders and Delivery Scope

Agricultural parts are replacement parts as well as production parts, so patterns and core boxes are retained after the first order to make repeat runs and aftermarket batches straightforward. Drawing revisions are recorded against the tooling, which keeps a spare-part order identical to the original assembly part.

Our castings are shipped from Jiangsu to customers in Germany, Japan, Italy, South Korea and Australia, normally by sea through the Ningbo and Shanghai gateways, with air freight when a programme requires it. Packaging is agreed per part family to protect machined faces and coating during container handling.

Yancheng Longwan Machinery Co., Ltd. also casts grey cast iron and ductile iron parts for automotive, reducer, valve, water pump and industrial robot applications, so a mixed casting package can be manufactured and inspected under one system.

Frequently Asked Questions

Which grey iron grades can you pour for agricultural machinery parts?

We pour to the grade stated on your drawing, typically within the flake-graphite family used for housings, covers and seats. Chemistry is verified per heat on the SPECTRO spectrometer, with tensile strength and Brinell hardness confirmed on cast test material, so the supplied castings match the specified grade rather than an assumed one.

Do you supply standard agricultural parts from stock?

No catalogue of standard parts is held. Production is customised to your drawings or samples, which is why wall thickness, cored passages, machining scope and coating are all defined by your part rather than by a fixed list.

Can you deliver parts fully machined and coated?

Yes. Parts can be supplied as-cast and shot blasted, or machined on our CNC lathes and lathes to your datum scheme. An automatic spray painting line and an electrophoretic coating line are in planning to extend the surface protection options we can offer directly.

How is quality assured on a serial agricultural parts order?

Inspection follows the IATF 16949:2016 system through raw material checks, in-process control and final full inspection before shipment. Depending on the part, this includes spectrometry, tensile and hardness testing, metallographic and sonic velocity checks, magnetic particle or ultrasonic testing, and dimensional verification against the drawing.

What happens to the tooling for repeat and spare-part orders?

Patterns and core boxes are kept after the initial order and tied to the released drawing revision. Repeat production and aftermarket batches are then cast from the same tooling, keeping replacement parts interchangeable with the original assembly part.