Four Shaft Shredder

How it works

Unlike two-shaft machines that produce irregular fragments, the quad-shaft configuration subjects material to two stages of shearing — primary shafts tear material apart, secondary shafts refine the output — delivering remarkably uniform particle size without screens.

A shredder reduces size by tearing rather than cutting. Rotating shafts carry hardened blades or hammers that grab the feed, drag it against a fixed counter-blade and pull it apart along its weakest plane. Because the material is torn instead of sheared in one clean pass, shredders tolerate mixed, bulky and contaminated scrap that would stall a crusher.

Shaft count sets the character of the machine. A single shaft runs fast against a static counter-knife and relies on a screen to hold material until it is small enough to pass, which gives tight output control. Twin shafts turn slowly and counter-rotate, pulling difficult material in without a screen. Four shafts split the work between a tearing pair and a refining pair, which is how a fine output is reached at low speed and low noise.

Key features

• Four-shaft design: primary pair tears, secondary pair refines — no screen required yet achieves screen-like uniformity
• Low energy consumption (37kW total) for its throughput class — 40% lower operating cost vs. equivalent hammer mill
• Extremely quiet operation (≤80 dB) — suitable for urban collection facilities and indoor recycling centers
• Very low dust generation — safe for workers in enclosed environments without heavy dust extraction
• Compact footprint: 2.8 × 2.1 × 2.2m — fits standard factory floor layouts
• Maintenance-friendly: all four shafts accessible from top-opening lid for blade inspection

How to choose shredders

• Start from the largest single piece you will feed and the throughput you need per hour — those two numbers fix the feed opening and the drive power.
• Decide whether the downstream process needs a controlled particle size. If it does, a screened single-shaft machine is the right family; if the goal is volume reduction before further sorting, a twin-shaft machine is more tolerant.
• Check what the material does under load. Ductile aluminium and thin sheet wrap around shafts; mixed light waste bridges in the hopper. Both are solved by machine geometry and a pusher ram, not by adding power.
• Plan the wear parts before you buy: blade or hammer replacement interval, whether blades can be changed individually, and whether the cutting chamber is reachable from the top.

Technical data

Typical applications

Small-to-medium WEEE processors, urban recycling centers, retail take-back programs, hospital waste (non-infectious general waste), and light industrial scrap dealers.

Specifications are indicative for the model family and are confirmed against your material in the quotation. Wear parts, power supply and control options are listed per project.

Frequently asked questions