GP300 Crusher Gear and Pinion Set for Mining Machinery

Product Overview

The GP300 Crusher Gear and Pinion Set constitutes the primary power transmission system in GP300 cone crushers, converting 450 kW motor input into crushing motion via a 17:1 gear ratio. This helical gear set (pinion teeth: 17, gear teeth: 289) operates at a maximum rotational speed of 1,800 RPM, delivering torque of 2,400 N·m to the crusher’s eccentric assembly. Its performance directly impacts the machine’s throughput, with a well-maintained set enabling consistent processing of 300–400 tons/hour of hard rock.

Features

Material Treatment: Both gear and pinion are forged from 20MnCr5 alloy steel (carbon 0.20%, manganese 1.10%, chromium 1.00%), subjected to carburizing (case depth 1.2–1.8 mm) and tempering to achieve core hardness of 30–35 HRC.

Tooth Geometry: Helical teeth with 15° helix angle and 20° pressure angle, designed using AGMA 2001-D04 standards to minimize noise (≤85 dB at 1 meter) and maximize load distribution.

Surface Finish: Tooth flanks are ground to Ra 0.4 μm with a lead error of ≤0.015 mm/100 mm, ensuring smooth meshing and reducing wear rates by 25% compared to hobbed-only gears.

Mounting Features: The gear includes a keyway (16 mm × 10 mm) and set screw holes (M12) for secure attachment to the eccentric shaft, while the pinion features a tapered bore (1:10 taper) for hub connection.

Application

Iron Ore Mining: Drives secondary crushing in hematite processing plants, handling feed with 60–65% Fe content.

Coal Preparation: Processes bituminous coal into 50–100 mm fractions for coking and power generation.

Phosphate Rock Processing: Efficiently crushes sedimentary phosphate ore (P₂O₅ content 25–30%) for fertilizer production.

FAQ

Q: How to check for proper gear mesh?

A: Apply a thin layer of Prussian blue to 3–4 teeth, rotate the gear set, and ensure contact pattern covers 60–70% of tooth height and 70–80% of tooth width.

Q: What causes premature gear wear?

A: Contaminated lubricant (particle count exceeding ISO 18/16/13), misalignment (over 0.1 mm/m), or excessive load (over 500 kW input) are primary factors.

Q: Is regrinding possible after tooth wear?

A: Yes, gears can be reground once if tooth thickness remains above 80% of original; consult manufacturer for regrinding specifications.