SAG Mill Spares | Trunnions Bolts Discharge Parts | ATF

Complete Range of SAG Mill Spares

SAG mills require numerous supporting components beyond primary liner wear parts, and the reliability of these auxiliary items directly affects overall mill availability and circuit throughput. Feed trunnion liners protect the ore entry point from the severe impact and abrasion created by ROM ore entering at high velocity, typically manufactured from chrome-moly steel (350–450 BHN) or austenitic manganese steel for extreme impact zones. Discharge trommels classify mill product before downstream processing, using wedge wire, perforated plate, or polyurethane screen panels with apertures of 8–25 mm matched to the circuit flowsheet. Feed chutes and spout liners—fabricated from AR400 or AR500 abrasion-resistant plate with rubber or ceramic lining—direct run-of-mine ore into the mill while withstanding continuous impact from conveyor-discharged rock. All these components must be engineered for the demanding conditions of primary grinding duty, where ore feed sizes of up to 300 mm and high throughput rates create punishing wear environments.

ATF supplies the complete range of SAG mill components, from single replacement parts to complete reline packages encompassing every wear component in the mill. Whether you need a trunnion liner, trommel screen panels, discharge cone liners, trunnion seal assemblies, or high-strength fastener hardware in Grade 10.9–12.9 per ISO 898-1, ATF can manufacture and supply parts precisely matched to your specific SAG mill configuration and operating conditions. Our engineering team works from OEM drawings, reverse-engineered measurements, or 3D laser scan data to ensure dimensional accuracy and correct material specification for every component. With experience supplying parts for SAG mills from 6 m to 12 m diameter across all major OEM brands including Metso Outotec, FLSmidth, ThyssenKrupp, and CITIC, ATF provides a single-source solution for SAG mill maintenance and capital spares.