Mining Machinery Shaft Parts—core components for torque/power transmission under extreme loads, abrasion, and impact in mining operations, with clear classifications, materials, processes, applications, and key design features.

Common Types & Applications

Gear Shaft
- Function: Integrate gear and shaft into one piece, used for meshing transmission and torque delivery in reducers, crushers, and ball mills.
- Material: 42CrMo, 20CrMnTi; heat treatment: quenching & tempering, carburizing & quenching for high surface hardness and core toughness.

42CrMo Grinded Gear Shaft.png

Transmission Shaft/Spindle Shaft

Function: Transfer power between distant components (e.g., conveyor drives, hoist systems); splined/keyed connections prevent slippage.
Features: Often long, with stepped diameters, splines, keyways, and tapered ends for assembly/disassembly.

Hollow Shaft/Trunnion Shaft

Function: Used in large rotating equipment like ball mill, rotary kiln; lighter weight than solid shafts, can pass through other components (e.g., lubrication pipes).
Material: Cast steel (ZG230-450, ZG270-500) or forged alloy steel for heavy load-bearing.

Axle Shaft

Function: Bear the weight of mining vehicles/equipment (loaders, trucks) while driving wheels; withstand bending and torsion.

Intermediate Shaft/Idler Shaft

Function: Transfer motion between drive and driven shafts in multi-stage reducers; stabilize the transmission system and adjust center distance.

Materials & Heat Treatment

Material	Typical Uses	Heat Treatment	Key Properties
42CrMo (alloy steel)	Gear shafts, transmission shafts	Quenching+Tempering (QT); surface hardening	High strength, toughness, wear resistance
20CrMnTi	High-precision gear shafts	Carburizing, quenching, low-temperature tempering	High surface hardness, good core ductility
ZG270-500 (cast steel)	Large hollow/trunnion shafts	Normalizing+Tempering	Good castability, suitable for heavy parts
40Cr	General shafts, intermediate shafts	Quenching+Tempering

Timothy Holding Forging Industry

Phone：+86-13758897904
E-Mail：sales@forging-shafts.com
timothyforging@163.com
Website：http://www.forging-shafts.com
Add：No.68 Wanquan road,Shanquan Village ,Zhouzhuang Town

,Jiangyin City ,Jiangsu Province ,China

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Mining Machinery Shaft Parts