Recent Blogs
Tappet Valve for a Rock Drill
How a tappet valve runs a pneumatic rock drill — porting, timing, and sizing for mining percussion drills. Real numbers from jackleg and stoper builds.
Steam Hoisting Engine
How a Steam Hoisting Engine lifts ore and miners up a vertical shaft — drum sizing, rope speed, named installations, and a worked example for...
Portable Diamond Drill
Portable diamond drills cut continuous core samples for mineral exploration. Learn how the bit, swivel, and feed system work, with sizing math and field examples.
Log Conveyer
Log conveyors move ore, coal, and waste rock through mining and processing plants. Learn how they work, key sizing formulas, and real-world examples.
Driving Mechanism
Learn how a mining driving mechanism transmits torque from prime mover to cutter or conveyor, with formulas, worked examples, and real underground machine specs.
Stone Crusher
Stone crushers reduce mined ore to feed sizes for downstream processing. Learn jaw, cone and impact crusher mechanics, sizing formulas and real mining examples.
Steam-driven Ventilating Fan
Steam-driven ventilating fans cleared methane and bad air from deep coal mines. See how Guibal and Waddle fans worked, plus a worked sizing example.
Rope Tramway
Rope tramway explained — how aerial cableways move ore across mountains, with formulas, capacity calculations, and real mining examples from Kuwait to Norway.
Rolling Crusher
Rolling Crusher explained — how double-roll crushers reduce coal, ore and aggregate, with sizing formula, gap settings, worked example and real mining applications.
Roller Coal Crusher
Roller coal crusher explained — how double-roll crushers size run-of-mine coal, sizing formulas, gap settings, and real prep-plant examples from working mines.
Rock Drill with Balanced Piston Valve
How a balanced piston valve rock drill works, with formulas, a worked penetration-rate example, and real mining applications from Sandvik and Atlas Copco rigs.
Rock Drill
Rock drill explained — how percussive and rotary-percussive drills break rock in mining and tunnelling, with formulas, specs, and a worked penetration example.
Revolving Pulverizing Mill
Revolving pulverizing mill explained — how tumbling mills grind ore in mining, sizing formulas, real worked example, and tradeoffs vs SAG and roller mills.
Revolving Hoisting Dredge
How a Revolving Hoisting Dredge works in placer and harbour mining — bucket math, hoist sizing, and real worked examples for production planning.
Railway Steam Shovel
How a railway steam shovel works — boiler, hoist drum, dipper stick, and crowd action sized for cutting railway grades and loading spoil cars in...
Railway Excavator
How a Railway Excavator works in mining and trackwork — bucket geometry, swing radius, rail-bound undercarriage, and real cycle-time numbers from working fleets.
Pulverizing Ball and Pan Mill
Learn how a pulverizing ball and pan mill grinds mineral samples to assay fineness, with sizing formulas, worked examples, and lab applications in mining.
Otis Stop for Elevator Cars
How the Otis safety stop catches a falling elevator or mine cage — governor, wedge clamps, guide rails, and the math behind stopping distance.
Ore Crusher
How an ore crusher works, the reduction-ratio formula, jaw vs cone vs gyratory tradeoffs, and a worked example for a hard-rock gold mining circuit.
Multiplex Butterfly Valve
Multiplex butterfly valves stage multiple discs on a common shaft to throttle high-flow slurry and tailings lines in mining without cavitation damage.
Mining Buckets and Skip
Mining buckets and skips haul broken rock up vertical shafts. Learn how skip hoisting works, payload sizing, dump geometry, and real headframe examples.
Miner's Safety Lamp
How a Miner's Safety Lamp detects firedamp and warns of low oxygen in coal mines. Davy, Geordie and Garforth designs explained with flame heights and...
Mast and Gaff Hoist
Mast and gaff hoist explained — how miners use the rig to lift ore, timber, and machinery from shafts. Includes formula, worked example, and selection...
Marine Dredge
How a Marine Dredge works — cutter heads, suction pipes, and spud walking — with formulas, worked production figures, and real examples from offshore mining.
Magnetic Ore Separator
How a Magnetic Ore Separator pulls iron-bearing minerals from gangue using a rotating drum and field gradient. Sizing math, worked example, and design tradeoffs.