Rotary Tiller Central Gearbox Housing
The rotary tiller central gearbox housing is the structural heart of the tiller drivetrain — it supports the gear set, input/output shafts and bearings, and transfers engine torque to the blade rotor under constant vibration and shock loads. We produce this critical component by precision sand casting, in grey iron, ductile iron and steel, with full in-house machining support.
Precision sand cast · Grey / ductile iron & steel · 0.1 – 3,000 kg (iron) · CT8–CT12 (ISO 8062) · Ra 6.3 – 15 μm
What Is a Rotary Tiller Central Gearbox Housing?
The rotary tiller central gearbox housing encloses the middle gear transmission of the machine and carries the drive shafts, gears and bearings that rotate the tiller blade shaft. Because it sits halfway between the tractor PTO and the work tools, the housing endures high torque peaks, heavy vibration and abrasive field conditions. A sound casting design — correct wall thickness, ribbed structure around bearing seats and proper material grade — is what keeps gear alignment stable and service life long.
Sand casting is the most widely used method to build such housings: it is not limited by alloy type, part shape or production quantity, and sand-cast parts account for about 80% of all castings. For a rotary tiller central gearbox housing, sand casting offers the fastest route from drawing to finished casting with very competitive tooling cost.
Sand Casting Process for Your Gearbox Housing
Every rotary tiller central gearbox housing we supply follows a complete sand casting workflow:
- Pattern making — a pattern is made from the part drawing; a core box and sand core are produced for hollow gear cavities and bearing bores.
- Molding — the sand mold is built with resin sand or green sand; automatic molding lines guarantee consistent mold density for a rotary tiller central gearbox housing.
- Pouring & solidification — molten iron or steel is poured into the cavity and solidifies to the final shape.
- Shakeout — the sand mold is knocked off; riser and gating system are removed.
- Cleaning & inspection — residues are cleaned, the casting is inspected and, if requested, machined to drawing tolerance before delivery.
Our two automatic production lines for cast iron and cast steel keep lead times short from prototype to bulk production of the rotary tiller central gearbox housing.
Materials & Technical Capabilities
FeatureSpecificationPopular materials for gearbox housingsGrey iron ASTM A48 Cl.20–35 / GG20–GG35; ductile iron ASTM A536 60-40-18, 70-50-05 / GGG40–GGG60; carbon & alloy steel on requestCasting weight (cast iron)0.1 – 3,000 kg; cast steel 50 – 25,000 kgDimensional toleranceCT8 – CT12 per ISO 8062Surface roughnessRa 6.3 – 15 μmProcessesResin sand, green sand; standards ASTM, SAE, AISI, DIN, EN, ISO, GBFollow-up servicesCleaning, machining (drilling / milling of bearing seats, flange faces), surface treatment
Grades listed are per ASTM / EN material standards; final grade selection for a rotary tiller central gearbox housing depends on your torque requirements — our engineers will confirm with you before production.
Why Choose Us for the Rotary Tiller Central Gearbox Housing
- Cost-effective for both prototypes and large production runs of the rotary tiller central gearbox housing
- Flexible design & size capability — housings from compact 125 cm tillers up to heavy-duty 400 cm machines
- Wide material range — grey iron, ductile iron, carbon steel and alloy steel to ASTM / DIN / EN / ISO / GB
- Short lead times — automatic molding lines, from drawing to first article
- One-stop service — casting plus machining and surface treatment under one roof
Applications
The rotary tiller central gearbox housing is used across the full tillage equipment range:
- Rotary tillers for dryland seedbed preparation and paddy field conversion
- Middle-box transmission housings (1GQN type) and heavy-duty reinforced models (1GQNKG type)
- Tractor-mounted implements requiring a sealed, oil-tight central gearbox housing
Frequently Asked Questions
Q: What material is best for a rotary tiller central gearbox housing?
A: Grey iron (ASTM A48 Cl.20–35 / GG20–GG35) is the most economical choice for standard housings; ductile iron (ASTM A536 60-40-18 or 70-50-05 / GGG50) is recommended where higher shock resistance is needed. Carbon steel and alloy steel are available for extreme service conditions.
Q: How is the rotary tiller central gearbox housing manufactured?
A: The housing is produced by sand casting: a pattern is made from your drawing, a resin-sand or green-sand mold is formed, molten iron is poured and solidified, then the casting is shaken out, cleaned and inspected. Machining of bearing seats and flange faces can be done in-house.
Q: What tolerances and surface finish can you hold?
A: Dimensional tolerance CT8–CT12 per ISO 8062 and surface roughness Ra 6.3–15 μm for as-cast surfaces. Tighter tolerances are achieved by machining critical faces such as bearing bores and mounting flanges.
Q: What weight range of gearbox housing can you cast?
A: Cast iron parts from 0.1 kg to 3,000 kg and cast steel parts from 50 kg to 25,000 kg, covering everything from small PTO housings to heavy tiller main gearbox housings.
Q: Do you make housings according to our drawing, and what about samples?
A: Yes — we produce the rotary tiller central gearbox housing from your 2D/3D drawing with OEM tooling. Prototype and mass production are both supported; contact us with your drawing for a sample and quotation.
Request a Quotation for Your Rotary Tiller Central Gearbox Housing
Send your part drawing, material and quantity — we reply with casting price and lead time within 24 hours.
Tel: +86-135-1608-5845 | Email:sales@leesh.cn | WhatsApp: +86-135-1608-5845
Rotary Tiller Central Gearbox Housing · Sand Casting · Hebei Gengyun Agricultural Machinery Manufacturing Co., Ltd.
