Keene Engineering RC46 Gas Powered Rock Crusher 4" x 6" Rock to Dust-Jaw Crusher
This is the Complete Keene Engineering RC46 Gas Powered Rock Crusher
Model RC-46 Rock Crusher with "Roller Scraper" Amazing 3 Stage Compact Rock Crusher. This Model quickly crushes 4" x 6" Rock into ultra fine powder. Over 20 years of manufacturing has proven this model to be a tried and tested reliable work horse. Rock is quickly crushed into 1/8 inch in size through the first stage jaw crusher and automatically delivered into the roller mill which reduces the material into fine powder. Material is then processed through the roller scraper which further reduces the material into "Ultra Fine Powder". Oversize material may require an additional pass. All replaceable and wear parts are designed with the operator in mind for easy adjustment and replacement in the field. Powered by an 11 HP Honda engine with a 6 to 1 gear reduction for dependable service. Designed for production with the highest quality material and components available. Built as compact as possible for ease of handling and maneuverability.
The new RC46 Rock Crusher is a three stage crushing machine that can reduce a rock as large as 4
x 6 inches into powder in moments. The first stage is a jaw crusher, that initially crushes the rock to a
size of approximately 1/4 of an inch. The second stage is a roller mill that automatically crushes the
pre-crushed material from the jaw crusher and grinds it into a fine powder. The third stage is the roller
scraper that further reduces the grind into a finer powder.
Although this machine is rated at one ton per hour, such capacity should not be expected in all types
of material, due to varying weight (specific gravity) and hardness of rock. The capacity in some cases
may be reduced as low as 4 or 5 hundred pounds per hour, with extremely hard rock. Proper and
preventative maintenance is essential to maintain optimum capacity. Please read your instructions
carefully and consult factory if problems exist.
The RC-46 is powered by and industrial 11 H/P Honda Engine with a gear reduction drive. The
optimum speed that the crusher should be operated is three quarters speed. You can regulate the
speed by operating the manual lever to the fast position. Do not attempt to feed material into the
crusher jaws until the engine is warm and operating at proper speed. Once a full tank is near empty,
allow the engine to cool before refueling. Do not allow the engine to run out fuel while operating. A
sudden stop while in operation may cause the jaws to seize. Always use this machine in a well
2. AIR CLEANER
The air cleaner requires additional care in a dusty environment. Remove the outer element and clean
it after eight hours of operation. Refer to the engine manual for additional maintenance instructions.
3. DRIVE BELTS
It is important that the drive belts are kept tight and frequently checked for proper tension. Loose
belts can cause the crusher to lose momentum and seize during operation, causing loss of valuable
production time. BEFORE CHECKING OR MAKING TENSION ADJUSTMENTS, ENGINE MUST
BE TURNED OFF. The belt tension can easily be checked by depressing the center section of the
belt with your finger. If the belt tension can easily be depressed more than one inch (25mm), it
should be tightened. The belt tension maly be adjusted by loosening the engine mounting boltls and
sliding the engine away from the crusher unit and then retightening bolts.
All eight bearings need to be greased once every eight hours of operation. Bearings are considered
properly lubricated when grease is observed starting to "ooze" from the bearing case. We
recommend (Molub-Alloy 777") grease, as it has been developed for dusty conditions.
During the first two hours of operation, all bolts and allen screws must be checked frequently for
tightness. A loose bolt can cause equipment failure, due to excessive vibration and it is advisable to
check all bolts and allen screws before each operation.
6. CRUSHlNG JAWS
a.If the jaws seize as a result of a rock jam, stop the engine immediately, fold back the hopper,
remove the flywheel shroud and rotate the flywheel backwards until the pressure on the jammed rock
is released. Then remove the rock if necessary. In the event the engine will not pull start, the rollers
may need cleaning. (Refer to instructions 7d.).
b.When wear is noticed at the bottom of the crushing jaw, the jaws should be hard faced by
welding the worn area, or rotate the jaw plate 180 degrees. This is easily accomplished by unbolting
the jaw plate from the crusher and rotating the worn portion of the plate up and the unworn portion in
the down position. It may be necessary to have an ARC WELDER at your disposal in order to weld
hard faced material with hard face material onto the worn portion of the jaw surfaces to maintain
proper thickness. If this procedure is not followed, the plate will become concave at bottom portion
and will render the jaws inoperative. This jaw plates of the rock crusher is considered "consumable"
and not covered by warranty. (SEE FIG 4 &5).
c.If pivot plate wear exists, a large gap in the bottom of the crushing jaw will result, allowing too
large of particles to fall into the rollers. The gap at the bottom of the jaw should never exceed one
half of and inch (1 2 mm) when fully opened. If the gap exceeds one half of an inch (1 2 mm), the
Pivot Bar should be replaced. Oversized pivot bars are available to compensate for worn sockets.
Larger Pivot Bars are available upon request.
JAW PLATE WEAR SURFACES
a. If rollers are not turning properly, check the free spinning roller to ensure that it is adjusted
b. It is recommend that the rollers touch lightly. Adjust pressure nuts on side of rollers evenly.
(SEE FIG 1 & 2)
c. If the rollers are too far apart due to wear, or adjustment the free spinning roller will lose friction
contact and consequently load with rocks.
d. If the rollers become overloaded with rocks, stop the machine immediately to avoid unnecessary
roller damage. Remove the roller shroud and remove rocks. It ;may be necessary to remove the
belts in order to reverse the pulley to open the jaw plates to dislodge rocks. After all rock particles are
cleared, replace the roller shroud and continue normal operation.
e. The rollers have been engineered to wear evenly in almost any condition. Care must be taken to
avoid uneven roller wear. The machine must be placed on level ground, as an unlevel surface may
cause the rollers to wear unevenly. Due to the unpredictable wear that rollers are subject to, they are
also considered as a consumable item and not covered under the replacement clause in our
Warranty. When they are severely worn, they must be replaced and not attempted to hard face or
repair. The rollers will last much longer if the Roller Scraper is not used. The Roller Scraper should
only be used if a finer grind is required.
JAW PLATE WEAR SURFACES
8. ROLLER SCRAPERS The Roller scrapers should only be when needed. The Roller
scrapper with reduce the life of the rollers.
a. The roller scraper is designed to give you "Super Fine Grinds" never before achieved with an
ordinary roller crusher. It is accomplished by a chaffing principal, provided by the roller touching an
angle iron that is spring loaded. The fine powder is again processed by the chaffing edge. The life
expentancy of the scraper could vary from one to twenty tons, depending on the rock hardness and
scraper pressure. Be sure to check the wear plate every ton of rock processed and replace it when it
is only half worn. It is therefore suggested, that several extra wear plates be on hand for continuous
b. The roller scraper may be used only when the free spinning roller is touching the drive roller.
During the operation, if the free spinning roller stops turning, because you have ceased to feed the
machine for a moment, be sure to tighten the pressure to the drive roller, otherwise jamming of the
roller may occur.
c. Sometimes when full spring compression is used, the roller scraper will emit, a loud shrieking
noise when stopping or starting. "Do not be alarmed", this is normal.
d. If coarser grinds are desired, simply disengage the roller scraper and space the rollers according
to the size of grind required.
ALWAYS WEAR SAFETY GOGGLES AND A HARD HAT, BEFORE, DURING AND AFTER ALL
NEVER OPERATE THE CRUSHER WITHOUT SAFETY SHROUDS! ALWAYS REPLACE SAFETY
SHROUDS AFTER ANY REPAIRS OR ADJUSTMENTS.
NEVER PLACE HANDS INTO THE JAW AND ROLLER AREA WHILE THE UNIT IS RUNNING.
NEVER STAND DIRECTLY IN BACK OF THE CRUSHER WHILE FEEDING. ALWAYS STAND
TO THE SIDE AS PARTICLES MAY FLY OUT AND CAUSE INJURY.
NEVER TILT THE SAFETY SHROUD OR HOPPER BACK WHILE THE CRUSHER IS RUNNING!
NEVER LOOK DIRECTLY INTO THE CRUSHING JAWS OR ROLLERS WHILE THE CRUSHER
IS RUNNING. ALWAYS WEAR SAFETY GOGGLES AND A HARD HAT WHILE OPERATING A
CRUSHER. ALWAYS WEAR AN "OSHA" APPROVED DUST MASK FOR THE POTENTIAL
PRESENCE OF "CRYSTALLINE SILICA QUARTZ", TO PREVENT "SYLICOSIS", OR OTHER
HARMFULL ELEMENTS THAT MAY CONTRIBUTE TO CRONIC LUNG DISEASES CAUSED BY
INHALLATION OF DUST.
Note; This crusher must be shipped or picked up. If shipped it will be shipped freight collect. This means you must pay for the freight when it arrives to the truck line who delivers it. Call for an estimate if your not familiar with freight charges. You may also arrange your own trucking. MADE in the USA - Shipping Weight is 570 Lbs
We do not sell or ship this Keene Engineering Product to Africa, South America or Asia.