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Yancheng Longwan Machinery Co., Ltd. HOME / PRODUCTS & APPLICATION / Ductile Cast Iron / Ductile Cast Iron Reducer Accessories

Ductile Cast Iron Reducer Accessories include key components such as planet carriers. Ductile iron is widely used in the manufacture of reducers due to its good mechanical properties and durability. Its high strength and toughness enable these accessories to operate stably under high load and high torque conditions. Ductile iron has good wear resistance and corrosion resistance, ensuring the long life and reliability of the reducer in various working environments. Ductile iron has good processing performance and can produce accessories with high precision and complex shapes, ensuring the high consistency and efficient operation of the internal parts of the reducer, providing a solid foundation for the reliability and efficiency of the entire reduction system.

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 and , 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
Ductile Cast Iron Reducer Accessories Industry knowledge

Yancheng Longwan Machinery Co., Ltd. is a ductile iron foundry in Yancheng City, Jiangsu Province, casting iron components since 2006. Our Ductile Cast Iron Reducer Accessories manufacturer range covers castings for gearbox and speed-reducer assemblies, firefighting and water pipe transitions, and general machinery builds, supplied alongside our automotive, agricultural machinery and industrial robot part families.

Reducer Accessories We Cast in Ductile Iron

Ductile iron is our base material for these parts because the nodular graphite structure combines tensile strength with the toughness needed under repeated load and torque. We pour to the grade stated on the drawing, work within the common 400-15 to 600-3 range, and confirm the final grade, hardness and microstructure acceptance at quoting.

  • Planet carriers and other load-bearing carrier bodies inside planetary reduction stages.
  • Reducer housings and covers with wall sections, bosses and machined joint faces.
  • Pipe-diameter transition reducer accessories for firefighting risers and water networks, where different pipe sizes must connect without restricting flow.
  • Flange and connection castings machined to mating dimensions and bolt patterns.
  • Custom bodies, brackets and adapters produced from your drawings or samples under our ODM/OEM programme.

Product Range and Where Each Type Fits

Cast component Function in the assembly Application fit Production route
Planet carriers Carries planet gears and transmits torque in planetary stages Reducer and gearbox builds, industrial drives, robotics joints Boxless shot-press molding, machining, inspection
Housings and covers Locate bearings and seal the reduction chamber Speed reducers, pumps, general drive units Coated sand cores, clay sand lines, machining
Pipe size transition fittings Connect different pipe diameters at full flow Firefighting pipework, water treatment and distribution Molding, shot blasting, optional coating
Flange and connection castings Provide pressure-tight bolt-up interfaces Valve, pump and pipeline assemblies Casting plus CNC face and hole machining
Bodies, brackets and adapters Support, mount or connect drive components Agricultural machinery, construction equipment, robot bases Molding to drawing, grinding, machining as required

Reducer castings frequently sit inside larger drive builds, so we also produce the neighbouring families that share the same mold and inspection flow: Ductile Cast Iron housings, carriers and mounts for industrial robot arms, agricultural gearboxes and pump assemblies.

Material Control From Melt to Microstructure

Three 1.25 t medium-frequency electric furnaces give us close control of chemistry and pouring temperature between heats. The German SPECTRO direct-reading spectrometer verifies composition before pouring, and the same equipment confirms the nodularity and pearlite-to-ferrite balance required for the mechanical properties on your drawing.

  • Tensile testing machine for tensile strength, yield and elongation records.
  • 3T Brinell hardness tester for surface hardness on the finished casting.
  • Sonic velocity meter and metallographic microscope for nodularity and graphite structure checks.
  • Molding sand testing set: SAC hammer-type sample making machine, SWY hydraulic strength testing machine, SSZ vibration-type sand screening machine and SGS double-disc infrared dryer.
  • Magnetic particle and ultrasonic flaw detection where the application requires internal soundness verification.

Molding Lines, Capacity and Production Fit

Molding line Box size Rate Best fit
Vertical sand-shot horizontal parting boxless shot-press line 610 x 510 x 240 mm 120 boxes/hour High-volume small reducer accessories
Upper and lower sand-shot horizontal parting boxless shot-press line 750 x 650 x 250 mm 100 boxes/hour Small and medium carriers, housings and covers
Clay sand lines (2 fully automatic, 1 semi-automatic) plus 1 coated sand line Pattern-dependent 15,000 t annual capacity Volume programmes and core-intensive geometry

A lost foam line for 100 kg to 1000 kg castings is in planning, together with automatic spray painting and electrophoretic coating lines. Where a reducer accessory needs a material alternative, our Grey Cast Iron Reducer Accessories range covers lower-load and vibration-damping applications.

Machining, Cleaning and Coating

Three CNC lathes and three lathes handle turning, facing, boring and bolt-pattern work on reducer accessories that require machined interfaces. Three cleaning shot blasting machines remove sand and scale after knockout, and grinding operations finish parting lines and gate stubs before inspection.

  • Machining allowance and datum scheme agreed at drawing review, so cast and machined dimensions stay consistent.
  • Coated sand cores for internal cavities such as oil galleries, bearing bores and pipe transitions.
  • Shot blasting for surface cleanliness before painting, electrophoresis or dispatch as-cast.
  • Gauge repeat checks on critical diameters, bores, flatness and bolt spacing.

Quality Planning and Acceptance Testing

Our quality system is built on the IATF 16949:2016 standard, with inspection points after each process step and a final full inspection against the agreed drawing and international standards. We inspect the raw material charge, control the process between molding, knockout, blasting and machining, and check every finished batch before shipment.

  • First-article sample submission using moulds made from your drawings, sent for written confirmation before mass production.
  • Chemical composition, tensile, hardness and microstructure reports per heat or per lot, as agreed.
  • Non-destructive testing by magnetic particle or ultrasonic method where internal soundness is critical.
  • Dimensional reports with the CMM or gauge method defined in the approval package.
  • Joint inspection with your inspectors before shipment when requested.

Information We Use to Configure Your Solution

  • Drawing or sample with material grade, tolerances, machining allowance and datum scheme.
  • Working point — torque, load path, speed and duty cycle the reducer accessory sees in service.
  • Assembly interface — mating bore, bolt pattern, flange dimensions and fit class.
  • Quantity and programme — prototype, pilot batch or recurring annual volume, to match the correct molding line.
  • Surface requirement — as-cast, shot blasted, primed, painted or electrophoretic coated.
  • Inspection and documentation scope — material certificates, dimensional report, NDT or sample approval.
  • Packing, marking and delivery — pallet, crate or returnable bin, plus port or airport of arrival.

Documentation, Packaging and Delivery

Our ODM/OEM workflow runs from drawing confirmation and quotation, through pattern and mould making, sample submission, mass production and inspection, to shipment after your release. Patterns, casting drawings and inspection records are retained so repeat orders can be produced to the same approved condition.

Castings are packed to the method agreed for the order, with part marking and traceability applied where the drawing calls for it. Goods ship mainly by sea through Ningbo and Shanghai, with air freight available for urgent lots; our products are delivered to customers in Germany, Japan, Italy, South Korea, Australia and other markets. Typical reducer accessories reach us as drawings for planet carriers, housings and pipe transition parts, and we quote machining, coating and inspection in the same proposal.

Frequently Asked Questions

Which reducer accessories do you cast in ductile iron?

Our ductile iron reducer accessory range covers planet carriers, housings and covers, flange and connection castings, pipe-diameter transition fittings for firefighting and water networks, and custom bodies or adapters produced from customer drawings. We also cast adjacent families such as Ductile Cast Iron Industrial Robot Accessories that share the same molding and machining flow.

What part sizes and order volumes fit your molding lines?

The vertical boxless line handles small parts at up to 120 boxes per hour, and the upper and lower sand-shot line handles small to medium parts at 100 boxes per hour, with box sizes of 610 x 510 x 240 mm and 750 x 650 x 250 mm. Larger castings from 100 kg to 1000 kg will be covered by the lost foam line now in planning. Annual capacity across the clay sand and coated sand lines is 15,000 tonnes.

What material and test data come with the castings?

We pour to the grade specified on the drawing and release material data from the German SPECTRO spectrometer, tensile testing machine, 3T Brinell hardness tester, sonic velocity meter and metallographic microscope. Molding sand is controlled with our SAC, SWY, SSZ and SGS equipment. Magnetic particle and ultrasonic testing are applied where internal soundness is part of the specification.

How does the ODM/OEM process run from drawing to shipment?

We confirm the drawing and quote, then make patterns or moulds, produce real samples for your approval, run mass production after your confirmation, inspect the finished castings with our inspectors or together with your team, and ship once inspection results and shipment details are accepted.

Can you machine and coat reducer accessories?

Yes. Three CNC lathes and three lathes cover turning, facing, boring and bolt-pattern work, and three shot blasting machines clean the castings after knockout. Automatic spray painting and electrophoretic coating lines are being added; until then, coating requirements are agreed case by case at quotation.

How do you handle repeat orders and spare parts?

Approved patterns, drawings and inspection records are retained at our Yancheng plant so repeat batches reproduce the same grade, dimensions and coating condition. Replacement castings for reducer and pipeline assemblies can be produced from the same approved pattern without retooling.