Komatsu P&H 4100XPC
An ultra-class electric rope shovel purpose-built to load the very largest mining haul trucks, using cable and hoist mechanics that predate hydraulic excavators by decades.
Approximate — dumping height with door open; no full overall-height spec found: 10.2 m — about 5.7× an average adult's height (1.8 m). The machine is always drawn at the same size here; the human figure is what actually scales.
01Overview
An ultra-class electric rope shovel purpose-built to load the very largest mining haul trucks, using cable and hoist mechanics that predate hydraulic excavators by decades.
02Purpose
Built to load the very largest haul trucks in the fewest possible passes, using cable-and-hoist mechanics because, at this scale, rope still out-lifts hydraulics.
03Historical Development
The P&H rope-shovel line, now built under Komatsu after its acquisition of P&H Mining, descends from cable shovel designs that predate hydraulic excavators entirely — cable and hoist rigging scales to enormous sizes more readily than hydraulic cylinders do, which is exactly why the largest shovels in the world are still rope shovels rather than hydraulic ones. The 4100XPC sits at the top of that lineage, engineered specifically around loading modern ultra-class haul trucks in as few passes as possible.
04Core Components
- Dipper (bucket)A twin-leg-handle dipper design that lets the bucket both crowd forward and hoist upward independently, rather than moving on a single fixed arc.
- Hoist rope and drumWire rope wound on a powerful drum that lifts the loaded dipper — the shovel's primary digging force.
- Crowd mechanismA separate drive that pushes the dipper handle forward into the bank as the hoist rope lifts, combining the two motions into a single digging arc.
- AC electric drive systemModern AC motors replacing the DC systems older rope shovels relied on, for finer control and lower maintenance.
05How It Works
The crowd mechanism pushes the dipper handle forward into the bank face while the hoist drum simultaneously winds in wire rope, lifting the dipper up through the material in a combined digging arc that fills the bucket using hoist tension rather than hydraulic ram force. Once full, the whole upper structure — dipper, handle, and boom — slews around on the shovel's base to swing the load over a waiting haul truck, where the dipper's door releases the load, before the cycle reverses to return for the next pass.
06Engineering Principles
The hoist rope-and-drum system is a direct wire-rope mechanical-advantage mechanism, exactly like a crane's hoist, scaled to lift tens of tonnes per cycle.
MechanicsTorqueAC drive motors on the hoist, crowd, and swing systems all need to deliver sustained high torque against constantly changing digging resistance.
GearsPlanetary GearsThe swing and hoist drives use planetary reduction gearing to handle the shovel's enormous torque within a compact drivetrain housing.
07Performance Characteristics
| Dipper capacity | 58.3 – 67.6 m³ |
| Nominal payload | 108.9 t |
| Typical truck match | 218 – 363 t haul trucks |
| Drive type | AC electric |
08Notable Examples
- Capstone Mantoverde, Chile4100XPC shovels have been deployed specifically to reduce truck queueing times at this copper operation.
- In-pit crusher-conveyor operationsThe 4100XPC's payload is also sized to feed high-capacity in-pit crushing systems directly, bypassing trucks altogether on some sites.
09Interesting Facts
- Its dipper alone can hold more material by volume than a small city bus.
- Rope shovels like this one are, mechanically, closer to a crane than to a hydraulic excavator — everything happens through wire rope tension, not hydraulic cylinders.
- It's engineered to load specific haul truck size classes in a target of three to four passes — fewer passes means less time each truck spends stationary being loaded.