Laboratory Crushers

Laboratory Crushers are available with four sizes of jaw openings and various capacities to suit the needs of batch laboratories and all continuous laboratory test plants and pilot test plants. Various construction features on the three types of Laboratory Jaw Crushers ensure their ruggedness and durability for constant usage over long periods of time. All units have main frame cast in one piece and reversible jaw plates cast of manganese steel. The smaller size crushers are furnished for belt drive or motor drive and with either of these drives provision is made for hand operation if desired. The larger units are available for power drive only with belt or motor. Let us make recommendations for type and size crusher for your batch laboratory or continuous or pilot test plant.

Laboratory Forced Feed Jaw Crusher

The (Type I) Laboratory Forced Feed Jaw Crusher is furnished in two sizes. The 5″x 6″ size is excellent for crushing in ore testing laboratories and continuous test plants. The 2¼”x 3½” size is ideal for assay or batch testing laboratories for such uses as sample crushing.

laboratory jaw crusher
Laboratory Jaw Crusher for Sale

This crusher is the high capacity, forced feed type with a one piece cast alloy iron frame. The eccentric bumper is special nickel cast iron and mounted on two tapered roller bearings which are sealed to exclude dirt. The eccentric shaft is machined from chrome nickel. The bearings are equipped with alloy bronze cast insets. All bearings are fitted with Klean seal fittings. Jaw plates and cheek plates are reversible and are of manganese steel. The safety toggles on these units may be either long or short, the length depending on the size product desired. Both sizes of crushers are available for motor drive using V-V or flat belt drive and the 2¼”x 3½” size may be furnished for hand or belt drive. Cast steel frames can be supplied.Laboratory Crushers

The 2¼”X 3½” (Type I) Laboratory Forced Feed Jaw Crusher is available incorporated into a crusher-pulverizer unit on a common base with a single driving motor. The pulverizer unit is the McCool Laboratory Pulverizer which is of the disk type, designed for grinding virtually any material, and for pulverizing to any mesh in one operation. This crusher-pulverizer unit is compact, efficient, and portable and ideal for use in laboratories.

The (Type II) Laboratory Forced Feed Jaw Crusher is available in only one size, 5″x 6″. This crusher is similar to the Type I crusher but with frame and bumper made of cast steel. This construction adds considerable strength to the shock resisting parts of the crusher. The bearings are all of special design; they are bronze and will stand continuous service, such as continuous test and pilot test plants require, without danger of failure. The jaw and cheek plates are manganese steel and are completely reversible, thus adding to their wearing life. The jaw opening is controlled by the position of an adjustable wedge block. The crusher is usually driven by V-V but can be arranged for V-flat and flat belt drive.

Laboratory Jaw Crusher

The 3″x 2½” (No. 1) Laboratory Jaw Crusher will reduce hard rock from 2½ inch to ¼ inch and finer at a rate of from 50 to 150 pounds per hour. This unit can be quickly and thoroughly cleaned as a safeguard against salting succeeding crushing, and provides an excellent means of reducing small quantities of ore samples quickly and efficiently, using either hand or power drive. Power driven unit is equipped with two V-belts.

The frame of this crusher is a one piece casting, fixed jaw plates are manganese steel, and movable jaw is alloy steel. Jaw plates are bolted so they may be reversed, thus doubling their operating life, and the movable jaw is pivoted to give a forward and downward motion, greatly increasing capacity on wet, sticky ores. Toggle pin has been eliminated by a new design pitman-toggle movement. Any wear that occurs in the toggle assembly is taken up by a large coil spring. Fineness of the crushed product is controlled by replaceable shims. Lubrication is by grease cups as standard but Alemite fittings may be supplied.

The 4½”X 3¼” (No. 2) Laboratory Jaw Crusher is similar to the No. 1 unit but is larger and provides greater capacity with increased strength for heavier work. This unit is available for power drive only and for belt drive is equipped with tight and loose pulley in addition to a heavy balance wheel. This larger unit will crush approximately 360 pounds of quartz per hour to 4 mesh. Frame is cast with heavy lugs in back for mounting electric motor. New motor support on individual motor driven units is designed to use part of the weight of the motor to maintain uniform tension on the V-belts. Three V-belts are provided on this unit for motor drive.

Laboratory Jaw Crusher

Laboratory Jaw Crusher Capacities

Laboratory Crusher-Size
Laboratory Crusher Size
Laboratory JAW Crusher

Laboratory Jaw Crushers

Small Laboratory Jaw Crusher

CRUSHER, Ore, Braun, Simplex—A cast iron crusher of rigid construction. Among its important features are the ease with which it may be opened for cleaning, and the simplicity of adjustment. One blow of a hammer loosens the wedge holding the non-vibrating jaw in place, allowing this jaw to be lifted out, thereby giving sufficient access for cleaning.

The fineness of the product obtained is regulated by increasing or decreasing the size of the discharge or lower opening of the jaws; this can be accomplished by a few turns of two regu­lating screws, which have hand wheels, obviating the necessity for use of wrench or other tools. The Braun Simplex crusher is made in one style only, for both hand and power operation. The flywheel has a handle attached for hand operation. The power pulley is 16 inches in diameter, with a 2½ inch face, and requires ½ H.P. The jaw is 6×3 inches, and the opening is 2×3 inches.Jaw Crushers


Laboratory Jaw Crusher

Practically of all steel construction, the frame plates being made of steel and all other essential parts subjected to strain being similarly made of steel. The Chipmunk Crusher has a jaw movement that insures a large capacity and impels the dis­charge, making it adaptable for crushing both hard and soft materials.


The vibratory jaw is mounted upon an eccentric at its upper end and rests against a toggle at its lower end. The eccentric imparts a circular or gyratory movement to the upper end, while the toggle compels the lower end to describe an arc of a small circle. This movement is both forward and downward and impels the discharge.

Easily Adjusted

An adjusting screw passes through the front spacer casting and fits into the recess in the adjusting block. This block engages with a service block, which presses against the stationary jaw. This device allows close adjustment, is strongly constructed and easily manipulated.

laboratory jaw crusher
Laboratory Crusher


The stationary jaw is simply lifted out of its chamber, permitting thorough cleaning of its interior parts.


The bearings are fitted with split bushings, made of special bearing metal. They can be taken up when slightly worn, or renewed when needed. All bearings are provided with grease cups.


The Chipmunk Jaw Crushers have the greatest capacity (size of jaws considered) of any crushing device. The type VC can be operated by either hand or power. It will reduce rock from about 214 inches down to 14 inch and smaller at a rate of 400 pounds per hour. The type WC is intended for power operation, and will crush rock at a rate of 1500 pounds per hour.

Instructions for Mounting

two raising blocks are furnished on which the machine should be mounted and then securely bolted to a strong bench.


The grease cups should be filled and then screwed down regularly, preferably each morning and during the day if operation is continuous.

Speed of Operation

We recommend a speed of 400 r. p. m. as giving the maximum efficiency.

Laboratory Jaw Crusher

Laboratory Jaw Crusher Parts

Laboratory Jaw Crusher

RENEWALS—For Chipmunk Crushers

Laboratory Crusher parts

Parts For Chipmunk Crushers.

Laboratory Crusher pulverizer

This outfit was designed and developed because of the need for a compact crushing and grinding unit, occupying a minimum of space and speeding up the work of crushing and grinding samples.

The equipment illustrated above includes the Braun Chipmunk Crusher and the Braun Type UA Pulverizer, both directly connected with V Belt drive to a single ball bearing enclosed type electric motor mounted on a special sliding base with adjustments for belt tightening. The bench top is three feet deep and four feet long:

  • The Crusher is the well known Braun Chipmunk—ninety per cent steel fabricated.
  • Type VC, capacity 400 lbs. per hour, 2¼” to ¼”, for ordinary operations.
  • Type WC, capacity 1,500 lbs. per hour, where the capacity requirements are heavier.
  • The Braun Type UA Pulverizer is recognized as standard in both metallurgical and industrial laboratories.
  • Equipped with 8-inch grinding plates of special alloy—straight drive—no gears—replaceable bearings.
  • CRUSHER AND PULVERIZER OUTFIT—Motor driven, complete with small Braun Chipmunk Crusher, Type VC, Braun Type UA Pulverizer, Sterling Mono enclosed motor 2 H. P. 3 phase, 50/60 cycle, 220/440 volt, starting switch, pulleys, V belts and bench top.
  • CRUSHER AND PULVERIZER OUTFIT—CRUSHER AND PULVERIZER OUTFIT—Motor driven, complete with large Braun Chipmunk Crusher, Type WC, Braun Type US Pulverizer, 3 H. P. motor and accessories as described above.
  • CRUSHER, Chipmunk—Small size, Type VC, with four V belts, Sterling Mono enclosed motor, 1 H. P. 3 phase, 50/60 cycle, 220/440 volts, and starting switch.
  • CRUSHER, Chipmunk—Small size, Type VC, with four V belts, but without motor or switch.
  • CRUSHER, Chipmunk—Large size, Type WC, with special adjustable mounting blocks, four V
  • belts, Sterling Mono enclosed motor, 2 H. P. 3 phase, 50/60 cycle, 220/440 volts, and starting switch.
  • CRUSHER, Chipmunk—Large size, Type WC, with special adjustable mounting blocks, four V belts, but without motor or switch.

Laboratory Cone Crusher

In the (Cone and Ring Type and buck types) Laboratory Crusher the crushing of quartz from ½ inch or ¾ inch to 20 mesh can be accomplished at the rate of 4 pounds per minute. For many years it has been standard equipment in samplers, mills and large mines where continuous or intermittent dry grinding is done.

The ore is ground between a revolving cone and a bell-shaped hopper, leaving the machine through double discharge openings. Size of product is controlled by a conveniently located handwheel. Drive is by a gear and pinion, supplied with tight and loose 18″x 6″ pulleys for flat belt drive, to operate about 150 R.P.M. on drive shaft. Grooved tight pulley and V-belt drive with 5 H.P. motor is also available.

Laboratory Cone Crusher Capacities

Laboratory Roll Crushers

(Type C) Laboratory Crushing Rolls are usually used as a secondary crusher, handling products from jaw crushers or gyratory mills and for making products for pulverizers. For certain special applications they are used as a continuous grinding unit.

The main frame and stationary roll journal boxes are cast as one piece, thereby assuring rigidity and greatest possible strength to withstand severe shocks. The roll spacing may be changed quickly and easily while rolls are in operation by means of a handwheel to control product size. Heavy compression springs protect the shells and bearings from excessive loads and shocks.

The roll shells are constructed of forged steel, and for rolls smaller than 12″ diameter the rolls and shafts are constructed as a replaceable unit. In the 12″ diameter size, replaceable roll shells are provided. Roll faces are ground smooth and true for efficient fine grinding.

Various drives are available. The unit drive, with one motor and one set of double V-belts mounted with crushing rolls on a common base of welded steel, is ideal for normal laboratory crushing operations.

Laboratory Crushing rolls

Laboratory Roll Capacity Table

Laboratory Crushing Rolls (Type M)

The (Type M) Laboratory Crushing Rolls embody the latest improvements and are constructed as a self-contained unit with proper provisions for adjustment and lubrication, and are completely housed and protected from dust.

The main frame is cast in one piece and of the best grade of gray iron. The stationary roll journal box is cast in the frame and movable roll is mounted on a sliding saddle of especially heavy design which slides on a machined surface. All bearings are outside of the housing. The shaft is of forged steel of sufficient diameter to withstand severe strains and shocks without deflection. Laboratory Crusher

All roll shells are made of heavy selected rolled steel to provide highest wearing qualities. Roll shells are bored to a straight taper corresponding to the taper of the cast iron hub and are held in place by shrinkage and reinforced by heavy lug bolts. The roll hub is securely keyed to the shaft by a full hub length key.

The movable roll is held in position by two double helical springs which are housed in main frame casting. The springs are held at any desired tension by lock nuts and the machine may be dismantled without changing adjustment of the springs.

Roll alignment is provided by split safety collars which are set in a recess turned in the shaft, making perfect alignment possible under severe operating conditions.

Heavy cast iron housing with replaceable white iron cheek plates is provided, and the housing may be opened from either side for inspection while rolls are in operation.

Various drives are available. The unit drive with one motor and one set of double V-belts mounted with crushing rolls on a common base of welded steel is ideal for normal laboratory crushing operation. Let us make recommendations for your laboratory unit.

Roll Crusher Capacity Laboratory Crusher speed

I Need Assistance