Reference Number: 141841

BRYANT CENTER HOLE GRINDER
 
 MODEL: 500    S/N: C-13276      NEW: 1971
 
 ** PRODUCES GEOMETRICALLY CORRECT CENTER HOLES - A VITAL
    REQUIREMENT FOR PRECISION O.D. GRINDING.  IT IS IDEAL 
    FOR RECENTERING DISTORTED CENTERS IN MACHINE SPINDLES,
    ARBORS, CENTER-CONTROLLED CHECKING DEVICES & FOR 
    OTHER SALVAGE WORK.  IT MINIMIZES STOCK REMOVAL &
    GREATLY IMPROVES WORK QUALITY & ACCURACY.
   60 DEGREE CENTERS UP TO 2" DIAMETER CAN BE GROUND
    IN WORKPARTS UP TO 6" DIAMETER AND 2" TO 42" LONG.
   OPERATION OF THE BRYANT IS UNIQUE.  INSTEAD OF UTILIZING 
    PLUNGE GRINDING, WITH IT'S INHERENT FAULTS, IT 
    "GENERATES" TO PRODUCE FINE FINISHES & PRECISION 
    TOLERANCES SIMILAR TO THOSE OBTAINED ON AN INTERNAL
    GRINDER.  
   HI-PRECISION 3-WAY GRINDING TO THE CONE-SHAPED GRINDING 
    WHEELS USED. THESE MOTIONS ARE (1) ROTARY MOTION OF THE
    GRINDING CONE ABOUT ITS SPINDLE AXIS.  (2) PLANETARY 
    MOTION OF THE GRINDING CONE ABOUT THE WORK AXIS.  
    (3) RECIPROCATING MOTION OF THE GRINDING CONE ALONG A 
    LINE 30 DEGREES FROM THE VERTICAL.  THE GRINDING CONE
    MAKES A LINE CONTACT WITH THE CENTER HOLE SURFACE,
    WHICH SIMULTANEOUSLY RECIPROCATING ALONG THIS LINE.
    THE UNEVEN WHEEL WEAR, OCCURRING WITH REGULAR PLUNGE
    GRINDING DUE TO FULL-WHEEL CONTACT, IS ELIMINATED.
 
 WORKPIECE LENGTH:.................................. 2 TO 42"
 CLEARANCE FROM TAILSTOCK CENTER TO COLUMN:............. 6.2"
 VISE CAPACITY................................... .060" TO 6"
 CONE ANGLE OF CENTERHOLES GROUND................. 60 DEGREES
 MAXIMUN CENTER HOLE GROUND........... 2" DIA.A AT 13,000 RPM
                                    1.12" DIA. AT 21,500 RPM
                                    0.56" DIA. AT 45,000 RPM
 MINIMUM CENTER HOLE GROUND............................ .050"
 ANGULAR GRINDING STROKE...................... .005" TO .100"
 PLANETARY DRIVE SPEED............................... 330 RPM
 
 APPROX. WT. ....................................... 1250 LBS
 DIMENSIONS ...................... 36" L-R, 31" F-B, 72" HIGH
 
 
 EQUIPPED WITH:
 PRECISION TWO-JAW VISE
 TAILSTOCK
 DRESSER WITH DIAMOND
 (1) DEAD CENTER
 PIVOTING TOP CENTER - READILY POSITIONS WORKPARTS FROM
  EXISTING CENTER HOLES
 NORGREN MICRO-FOG OIL LUBRICATOR WITH FILTER
 ADAPTER FOR DUST COLLECTOR
 1/4 H.P. 3/60/208-220-440 VOLT PLANETARY DRIVE MOTOR
 3/4 H.P. 3/60/230-460 VOLT MAIN DRIVE MOTOR WITH CONTROLS
 MACHINE WIRED FOR 3/60/440 VOLT OPERATION
 
 *** EXCELLENT CONDITION - ALL ORIGINAL PAINT ***
 
 ** F.O.B. OUR HARRISON, NJ WAREHOUSE **