Williams Patent Crusher & Pulverizer Co., Inc.

Reversible Impactors



High Capacity Size Reduction of Solids by Mid-Air Impact Williams Reversible Impactors are among the most advanced of the secondary or tertiary crushers for the reduction of stone, coal, ore, clay, shale, refractories, ceramics, scrap glass, chemicals, fertilizers, and other materials.

Impact crushing typically fractures material across the line of cleavage rather than crushing only with the strata. Consequently, the product formed in an Impactor contains a high percentage of cube-shaped material. When compared to the product from machines that crush by attrition or compression, the product from an Impactor contains far less material with flats and slivers.

Size reduction ratios as high as 35 to 1 are frequently obtained with an Impactor. Often, one Impactor can do the job of two crushing machines, thereby saving the cost of additional motors, conveyors, and surge piles.

The Impactor, with its large unrestricted discharge opening, can frequently crush wet or sticky materials that would plug other crusher types.

With an Impactor crushing system, maintenance and operating costs can be drastically reduced. There are few close tolerances between crushing surfaces, and no cage bars to maintain. Horsepower per ton is generally quite low.

Push button reversibility of the rotor permits the use of both sides of the hammer without resorting to costly manual hammer turning. This assures maximum utilization of crushing surfaces.


Impact Blocks Williams Reversible Impactors utilize one piece impact blocks that have proven to be far superior to old design, multiple, bolt-on breaker blocks.

The Williams Impact Block is designed to be rotated top for bottom to assure maximum utilization of the part. Positive positioning of the Impact Block by means of heavy jack bolts, or with an optional hydraulic system, permits maintenance of the optimum internal crushing

clearances, thereby continuing conformance with product specifications.

A most important feature for the user - with Williams one piece Impact Block, typical problems encountered in changing multiple, bolt-on breaker blocks are eliminated. No longer does the user contend with inaccessible hold-down bolts that have seized or loosened, or with rough multiple replacement castings that don't match, won't fit, and take longer to install.

Rotors Rotors are available in diameters up to 72' and in lengths up to 120' for the largest crushing requirements. The hammers are alloy steel and heat-treated for resistance to abrasion. Shafts are of forged heat-treated steel carefully machined to size and fitted with keyways for the discs and drive member.


The heavy construction of the Williams rotor provides sufficient moment of inertia so that an internal flywheel effect is created. An external flywheel is not required. For quiet operation, rotors are statically and dynamically balanced prior to shipment.
Hammers Hammer design and metallurgy provide the optimum weight distribution and wear resistance for Impact Crushing. Hammers are of the 'T' or yoke design suspended from heat-treated hammer bolts. Hammers are free to pivot back in the event tramp iron enters the Impactor.

Bearings Heavy-duty, self-aligning, double row, anti-friction bearings are provided as standard. Depending on the size and speed of the rotor, grease lubrication, static oil lubrication, or circulating oil lubrication is provided. Large shafts are designed for hydraulic fitting and removal of the inner bearing race.

Jack Bolts Jack Bolts provide for adjustment of the impact sections. Shims maintain proper adjustment and transmit crushing forces to the rugged steel plate frame.


Full Access Covers Full Access Covers provide quick, complete access to the Impactor interior. The covers can be opened without disturbing the feed chute or overhead feeder mechanisms. Both sides of the Impactor frame can be made removable, hinged, or with hydraulic openers added.

Power Train Williams Reversible Impactors are suitable for V-Belt drive, direct connection through a flexible coupling, drive through a gear reducer, or dual drive from each end of the shaft. Motor starters should be of the reversing type.

Customer reviews

No reviews were found for Reversible Impactors. Be the first to review!