35# Cast Steel
Original material reference for high-load trunnion castings.
Heavy cast-steel mill trunnions machined for bearing contact, load transfer and reliable material passage.


A ball mill trunnion carries rotation of the mill cylinder, supports the machine weight and provides a channel for feed or discharge. The original page specifies integrated casting and machining with special attention to the journal that contacts the spherical bearing tile.
AGICO supplies standard and special trunnions from drawings. Casting soundness, neck geometry, journal smoothness and the cylinder connection are controlled to reduce fracture and premature bearing wear.
Values shown below preserve the original product information while identifying what must be confirmed for the actual order.
| Product | Ball mill trunnion |
|---|---|
| Original unit weight | 5–30 tons |
| Original process | Sand casting |
| Original material reference | 35# cast steel |
| Heat treatment | Normalized, normalized and tempered, or quenched and tempered |
| Inspection | Chemical, mechanical, UT, MT, PT and X-ray as specified |
Original material reference for high-load trunnion castings.
Bearing-contact area is finished for accuracy and smoothness.
Process is selected for strength, toughness and dimensional stability.
Feed or discharge trunnion for cement and mineral grinding.
Custom load-carrying hollow journals for rotating mill shells.
Drawing-based trunnions for long-cylinder grinding equipment.
Mill model and feed or discharge position
Casting and machining drawing
Journal diameter, bearing contact and surface finish
Material, heat treatment and NDT acceptance criteria
Material certificate and traceability review
Process inspection against the approved drawing
Critical dimensions and mating-interface verification
NDT, hardness or balance checks when specified
Identification, surface protection and export packing
The Ball Mill Trunnion transmits or supports operating load through rotating and stationary interfaces. Its performance cannot be judged by outside dimensions alone. Load path, mating parts, operating environment and the condition of the surrounding equipment all affect whether a replacement will fit correctly and run reliably. AGICO therefore reviews the component as part of the machine rather than treating it as an isolated catalogue item.
For a replacement project, the most useful starting point is the current drawing together with the equipment model and site observations. Wear photographs, failure location, maintenance history and measurements taken during shutdown help distinguish normal consumption from an interface, alignment or operating problem. This review allows the quotation to state the proposed supply boundary and the information that still requires confirmation.
Confirming the following groups of data reduces dimensional risk and avoids selecting the Ball Mill Trunnion from a name or model reference alone.
Provide the available values, drawing references and photographs for applied radial, axial and transient loads. AGICO will compare them with the proposed Ball Mill Trunnion configuration and identify any missing inputs before the manufacturing basis is released.
Where site data differs from an old drawing, mark the measured value and the measurement position. The final requirement should be agreed against the approved drawing rather than assumed from a nominal equipment designation.
Provide the available values, drawing references and photographs for mating diameters, fits, datums and bolt pattern. AGICO will compare them with the proposed Ball Mill Trunnion configuration and identify any missing inputs before the manufacturing basis is released.
The production route for the Ball Mill Trunnion is established after drawing review. It typically coordinates casting or forging route, heat treatment and rough machining. Process hold points depend on material, geometry and the buyer's inspection requirements. Critical datums and machining references are identified early so that later operations protect the interfaces used during installation.
Inspection is planned around product risk rather than added only at final dispatch. Material traceability and heat-treatment records; Critical journals, bores, faces and runout; Specified NDT at highly stressed transitions; Balance, contact pattern or assembly checks when applicable. When a test or report is required, it should be listed in the enquiry so that sampling, acceptance criteria and document format can be agreed before manufacture. Final release checks also confirm marking, quantity, surface protection and the packing list.
Maintenance teams should evaluate the Ball Mill Trunnion together with its mating parts and operating records. Typical reasons for closer inspection include:
Unusual vibration, noise or temperature near the component. Record the location, extent and operating condition, then compare the finding with the equipment maker's limits and the site's maintenance procedure before deciding whether repair or replacement is appropriate.
Cracks, scoring, fretting or uneven contact marks. Record the location, extent and operating condition, then compare the finding with the equipment maker's limits and the site's maintenance procedure before deciding whether repair or replacement is appropriate.
Loss of alignment, excessive runout or repeated seal failure. Record the location, extent and operating condition, then compare the finding with the equipment maker's limits and the site's maintenance procedure before deciding whether repair or replacement is appropriate.
Dimension drift that prevents a controlled fit during shutdown. Record the location, extent and operating condition, then compare the finding with the equipment maker's limits and the site's maintenance procedure before deciding whether repair or replacement is appropriate.
AGICO can prepare a drawing-based Ball Mill Trunnion for new supply or replacement service. The technical review covers the requested material, configuration, interfaces, inspection scope and documentation. If the original drawing is incomplete, provide measurements, nameplate information and clear photographs; the missing points will be listed for confirmation. No order-dependent dimension or performance value is treated as final until it appears in the approved technical documents.
Packing is planned for component weight, geometry, transport mode and destination. Finished surfaces can be protected against handling damage and corrosion, while loose accessories and documents are identified against the packing list. For international delivery, buyers should state the destination, preferred trade terms, lifting or site-access restrictions and required arrival schedule so that the quotation can separate manufacturing scope from freight and local handling.
Complete technical inputs reduce clarification cycles and help us quote the correct supply scope.
Send Your RequirementReview drawing and operating data
Confirm material, process and inspection plan
Manufacture and machine the component
Complete agreed inspection and records
Protect, pack and ship for installation
Yes. Send the drawing, equipment model and operating data for engineering review before quotation.
The agreed scope can include material certificates, dimensional reports and product-specific NDT, hardness or balance records.
Provide the ball mill trunnion drawing or dimensions, material, quantity, operating conditions, destination and required delivery date.
Yes. Packing and shipment can be planned for the component size, finished-surface protection and destination requirements.
Send your drawing, operating data and delivery destination for a technical review and quotation.
Request a Ball Mill Trunnion Quote