Custom cast and CNC-machined gearbox housings for tractors, harvesters, seeders and other agricultural machinery.

Agricultural machinery gearbox housings are key transmission parts that often combine complex cast structures with multiple machined faces, bearing bores, mounting holes and internal cavities.

Unna Metal manufactures custom gearbox and transmission housings according to customer drawings or samples. We support projects from casting and rough machining through precision CNC machining and final inspection, with parts supplied at the stage required by the customer.

Gray iron and ductile iron are commonly used for agricultural machinery gearbox housings, depending on the required strength, vibration performance, wall thickness and operating conditions.

Typical material options include:

Depending on the part design and project requirements, our manufacturing scope can include:

For large and complex gearbox housings, casting quality and machining accuracy need to be considered together from the beginning of the project.

Before production, we review the drawing to evaluate the casting structure, machining allowance, datum selection, bearing positions, critical dimensions and relationships between machined surfaces.

This helps identify potential manufacturing risks early and supports more stable machining, assembly and repeat production.

Custom gearbox and transmission housings can be manufactured for agricultural equipment including:

Parts can be supplied according to the customer's production requirements as:

Inspection can be arranged according to drawing and project requirements, including:

Agricultural gearbox housings are normally custom parts rather than standard off-the-shelf products. Material, dimensions, casting structure, machining requirements and inspection standards are therefore produced according to each customer's drawings and technical specifications.

For a new project, you can provide 2D drawings, 3D models or available samples for an initial manufacturing review.

Send us your drawing or sample. We can first review the casting and machining requirements and confirm a suitable manufacturing approach for your project.