6700D Horizontal Grinder

6700D Horizontal Grinder


The 6700D Horizontal Grinder is Peterson’s largest horizontal grinder, and is designed for operations  that need the most durable, highest output machine. Powered by a 1125hp (839 Kw) Tier II, Caterpillar C32 engine or an optional Tier IVi Caterpillar C32 engine, the 6700D is designed for the toughest jobs.

With a feed opening of 66 x 50 inches (168 x 127 cm), the 6700D Horizontal Grinder can even process large stumps that used to be reserved for tub grinders. The grinder is particularly suited for land clearing operations or other applications where mobility is desired. System pressure transducers and remote monitoring capability simplify set up and provide complete engine and system parameters.

Peterson’s three-stage grinding process with an up turning rotor and large grate area enables the 6700D Horizontal Grinder to produce materials to exact specifications. The quick-change multiple grate system makes it easy to customize grate configurations to produce a wide variety of finished materials. Grates are removed through an large access door on the side wall.

The IQAN control panel provides self-diagnostics for faulty sensors and open circuits; it features a large display.

Since 1981, Peterson has specialized in the developing of delivery and processing equipment that turns low-grade organic materials into high value products.

6700D Horizontal Grinder


3-Stage Grinding Process Provides Faster Reduction

Peterson’s powerful up-turn 3-stage grinding process provides better fracturing of material and a more consistent product, giving you just the product your buyers are looking for.

The Impact Release System Protects Your Investment

Peterson’s patented Impact Release System’s air bags provides uniform grinding and protection from contaminated feedstock, a feature unique to Peterson grinders.

The Second Line of Defense: The Impact Cushion System

Urethane cushions and shear pins help protect the mill from catastrophic damage in the event of a severe impact from contaminants in the feedstock.

Heavy-Duty Feed Chains

Features heavy duty feed chains to ensure a lasting product.

Use Peterson Bits for The Best Quality Product

Peterson offers a wide variety of durable, long-lasting bits to enable you to produce exactly the products your customers demand.

Use Peterson Grates for The Best Quality Product

Peterson offers a wide variety of durable, long-lasting grates to enable you to produce exactly the products your customers demand.

The 6700D standard drum rotor.

The 6700D comes standard with a robust drum rotor.

The 6700D optional pinned rotor.

The 6700D can also come equipped with an optional pinned rotor for tougher or contaminated materials.

6700D Horizontal Grinder



Operating Length
62'-11" (19 m)
Operating Width
11’-10 1/4” (361 cm)
Operating Height
17’-6 5/16” (534 cm)
Travel Length
51'-1/4" (1562 cm)
Travel Width
11'-1" (338 cm)
Travel Height
12'-11 1/2" (395 cm)
Hopper Length
17'-6" (533 cm)
Hopper Width
66” (168 cm)
Hopper Height
8’-9” (267 cm)
Front to 5th Wheel
5’-2” (157 cm)
5th Wheel to Center Axle
37'-6" (1143 cm)
Axle Spacing
60" (53 cm)
5th Wheel Clearance Radius
6' (183 cm) radius
5th Wheel Height
50” (127 cm)


Machine Weight*
98,000 lbs (44,452 kg)
Tri-Axle Weight*
56,820 lbs (25,773 kg)
*depending on configuration


Caterpillar C32 Tier II or Tier IVi CAT engine
C32 @ 1125 hp (839 kW)
Fuel Tank Capacity
414 US gal (1567 L)
Main Hydraulic Tank Capacity
95 US gal (360 L)

Feed System

11 yd³ (8.4m³)
5 sections, full hopper width
Feed Opening (width x height)
66" x 50" (168 x 127 cm)
66" x 65" (168 x 165 cm)
Compression Roll Diameter (tip to tip)
42" (107 cm)


Compression Roll Diameter (tip to tip)
7 1/2" (19 cm)
Rotor Speed
840 rpm @ 2100 rpm (engine)
Rotor Width
69 3⁄8 (176 cm)
Rotor Diameter
46 1/2" (118 cm)
Bit Size (width x height)
3" x 6 1/2" (7.6 cm X 16.5 cm)
Number of Bits


Bit Size (width x height)
Total Grate Area
5253 in² (33 890 cm²)
Grate Coverage
186 degrees
Grate Thickness
1 1/2" (38.1mm)

Discharge System

60" (152 cm)
Discharge Conveyor Speed
450–700 ft/min (137.20–213.36 m/min)

Production-C32 1125hp Tier II or Tier IVi

583 yd³/170 US tons (446 m³/154 metric tons) per hour
653 yd³/111 US tons (499 m³/101 metric tons) per hour
Actual output may vary due to moisture content, material density, material size, support equipment, and grate size. Production rates are based on grinding 50 minutes per hour.

Optional Equipment

requires cross belt conveyor

Specifications subject to change without notice.

6700D Horizontal Grinder


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