The all-rounder
Maximum throughput for ultra-fine grinding

The GDL hammer mill can be used for coarse grinding in compound feed production as well as for fine grinding for pet food and fish feed. Sophisticated design for efficient grinding: The special 6-axis rotor design with quick-change beater carrier system and optimised beater configuration guarantees maximum material contact for efficient production of fine and coarse feed qualities. The GDL series comprises three housing sizes for motorisation from 132 kW to 450 kW drive power.
Coarse grinding and fine grinding
Advantages of the large-capacity grinder GDL
Efficient Grinding, High Capacities and Flexibility
- Optimised impact zone with hardened impact plates on both sides of the inlet
- Universal use from fine to coarse grinding possible
- Large grinding chamber for high capacities
- High energy efficiency due to special rotor design
- Quick screen change allows a selective structure change of the ground material in just a few minutes
- Variable grist spectrum by adjusting the beater circumferential speed (when using a frequency converter), the screen perforation and the beater configuration
Reliable Operation and Long Durability
- Robust welded steel construction for continuous industrial operation (24/7)
- Grinding chamber equipped with wear elements to protect the
housing, easy to change - Durable, optimised rotor design, dynamically balanced, operation in both directions of rotation
- To protect the screens: foreign body catch trap for impurities inside the grinding chamber
High Availability with Low Downtimes
- Quick and easy change of beaters due to beater frame system, beaters can be changed outside the mill
- With a second set of beater frames, the machine is immediately ready for use again
- Rotor with short run-down time < 6 min without brake
- Wide-opening doors allow easy and quick access to the machine interior
- 6-piece screen cage system, can be changed manually quickly and easily depending on requirements or wear pattern (during idling)
High Safety of Personnel and Plant
- Standstill monitoring with door safety device
- Pressure shock resistant and flameproof design (0.4 bar)
- ATEX design according to zone 21 (II 2 D) inside and zone 22 (II 3 D) outside optionally possible
Technical Data
Technical details
Machine types
- Robust welded steel construction, symmetrical housing for operation in both directions of rotation.
- Grinding chamber equipped with wear elements to protect the housing walls, easy to replace
- Armored inlet flap with position switch for change of direction of rotation
- Optimized impact zone with armored impact plates on both sides of the inlet for efficient size reduction
- Debris catcher pocket inside the grinding chamber to protect the screens
- Durable, optimized rotor design, dynamically balanced, run-down time < 6 minutes without brakes
- Beater carrier system (cassette change): easy, quick beater change in a few minutes
- Wide opening doors allow easy access to the grinding chamber
- 6-piece screen basket system, depending on requirements and wear pattern, can be changed manually quickly and easily
- Mill and motor unit can be separated, easier installation especially in confined spaces
- Tested and certified in pressure shock resistant and flameproof design (0.4 bar)
- Variable grain spectrum via variable beater circumferential speed (when using a frequency converter),
- Sieve perforation and beater configuration; depending on requirements.
GDL 12 | GDL 20 | GDL 25 | |
---|---|---|---|
Grinding chamber diameter (mm) | 1200 mm | 1200 mm | 1200 mm |
Screen width (mm) | 640 mm | 1000 mm | 1250 mm |
Grinding chamber area (m2 ) | 1.84 m² | 2.88 m² | 3.60 m² |
Dimensions and weights | |||
Length x width x height (approx. mm) | 2630 x 1600 x 1600 mm | 3050 x 1600 x 1600 mm | 3300 x 1600 x 1600 mm |
Weight without motor (approx. kg) | 1950 kg | 2450 kg | 2900 kg |
Drive | |||
Motor size (kW) | 160 – 250 kW | 250 – 355 kW | 355 – 450 kW |
Speed 50 Hz/60 Hz (rpm) | 1500/1800 | 1500/1800 | 1500/1800 |
Speed with frequency converter 34-60 Hz | 1000 – 1800 | 1000 – 1800 | 1000 – 1800 |
* Depending on motor size Measuring surface sound level < 88 dB (A) (under load)
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