Applications:

RA Series Dual Stage Fine Grinding Hammer MillThe RA Series Dual Stage Hammer Mill features two gravity discharge industrial hammer mills, stacked one over the

other. This unique design is ideal for two distinct processing goals: reducing large, bulky materials to a fine

consistency, and grinding free flowing material to a ultra fine finished particle size.

The energy resulting from the dual revolving rotors produces a suspension zone that provides additional size

reduction. As a result, a finer grind is achieved in one pass through the dual stage mill, than can be achieved in

multiple passes through a single hammer mill.

Quality, since 1928 www.hammermills.comThe Leaders in Size Reduction

• E-Scrap• Stone and Aggregates• Glass and Ceramics• Coal and Coke• Quicklime• Chemicals

• Agricultural Grains• Fish Meal and Bone Meal• Hard Resins• Hard Surface Products• Lathe Turnings• Metal Powders

RA Series Technical Specifications

61 Depot Street | Buffalo, New York 14206 | 716-855-1555 | 1-800-447-4634 E-mail: info@hammermills.com | www.hammermills.com

• Available in 5 standard sizes• Space saving stacked design features slide-out rail for ease of maintenance• Option of carbon or stainless steel construction plate• Multiple hammer styles and sizes• Reversible hammers maximize wear life• Replaceable abrasion resistant wear plates protect mill housing• Interchangeable heavy duty bar grates or perforated screens made from abrasion resistant steel

Model HousingShaft Diameters

Rotor Diameters Bearings Horsepower Range

RA-8-H, RA-16-L

Key Features:

• Reversible hammers maximize wear life• Replaceable abrasion resistant liner plates

protect mill housing

The Leaders in Size Reduction

3/8" 2 1/2" 16"

Maximum RPM

(10mm)

(60mm)

(410mm)10-25hp

(7.5-18.5kW)

1 7/16" (40mm)

Bottom unit slides out for ease of maintenance

Wear Plate Thickness

3/8" (10mm)

3600 RPM

RA-20-L1/2"(12mm)

2 1/2" 18"(460mm)

1 15/16" (50mm)

1/2" (12mm) 3000 RPM

20-50hp (18.5-37kW)

RA-25-H

RA-36-L

5/8"

3/4"

(15mm)

(20mm)

(60mm)

(90mm)

(110mm)

3 3/8"

4 3/8"

24"

26"

(610mm)

(660mm)

2 7/16"

2 15/16"

(60mm)

(70mm)

5/8"

3/4"

(15mm)

(20mm)

2400 RPM

1800 RPM75 -100hp

40-75hp

(30-55kW)

(55-75kW)