BICO WD Chipmunk User Manual
BICO Equipment
Bico, Inc.
3116 Valhalla Drive, Burbank, CA 91505
Tel. (818) 842-7179 – Fax (818) 842-7976
BICO CHIPMUNK JAW CRUSHER - TYPE WD
The Bico Chipmunk Jaw Crusher is designed to give long and efficient service. In order to secure
the long life and excellent performance that your crusher is capable of delivering it is essential that
the following directions for operation and maintenance be carefully observed.
THE MECHANICS OF ITS SUCCESSFUL DESIGN
The upper end of the jaw travels in a circular path driven by the eccentric shaft. The lower end
oscillates through a short arc described by the toggle. The resultant jaw action is forward and
downward motion relative to the stationary jaw that crushes the sample and forces its discharge.
The discharge opening between jaws can be adjusted to control crushed particle size by turning
the hand wheel on the side of the crusher. The adjusting mechanism consists of steel wedge
blocks operated by a screw. The wedge blocks transmit crushing forces from the jaw to the frame,
relieving all strain on the adjusting screw itself. The stationary jaw is simply lifted out of the frame
to completely expose the inner parts for through brushing and cleaning. Dropping the cam-lock
handle anchors the jaws securely in position.
Jaw plates are tough, thick steel and are reversible end for end for double wear. Heavy bronze
bearings are sealed against dust and dirt and are lubricated by grease cups so that no special
greasing tools are required.
INSTRUCTIONS
The Flat Faced Pulleys on the VD and WD Crushers as run with V-Belts is a specially engineered
arrangement for these machines. This combination has been in use for many years in the
manufacture of this crushing equipment and has proven to be the very best arrangement for
machines such as these. When equipment is confronted with a "SHOCK LOAD" condition, this v-
belt/flat pulley arrangement allows just enough "give", thus preventing undue strain on the key,
flywheel and eccentric shaft.
Manganese Steel plates are available on special order. It is recommended that only one plate,
preferably the Stationary plate, be of this material. Two Manganese Steel plates will not reduce
hard ores satisfactorily because there is insufficient "grab" between the surfaces. Manganese
plates are wear hardened with impact and heating.