Description

GLEASON Pfauter MODEL NO. 640 – Year 1988
CNC Hypoid Spiral Bevel Gear Generating Machine

MODEL NO. 640 GLEASON “CNC” HYPOID SPIRAL BEVEL GEAR GENERATING MACHINE

SUITABLE FOR THE COMPLETING OF LARGE SPIRAL BEVEL, ZEROL BEVEL
OR HYPOID PINIONS AND MATING GEARS UP TO 34” (863MM) DIAMETER
OF ANY RATIO UP TO 10:1. WITH 1.08 DP (MODULE 23.5) CUTTING CAPABILITY.
THE EXTREME VERSATILITY OF THIS MACHINE PERMITS THE GEAR MANUFACTURER TO SELECT THE
MOST EFFICIENT CUTTING METHOD FOR ANY LOT SIZE OF GEARS IN HEAVY DUTY APPLICATIONS, SUCH AS
TRUCKS, BUSES, TRACTORS, INDUSTRIAL MACHINERY, OFF-ROAD EQUIPMENT, AND MARINE DRIVES.
THE 640 GLEASON MACHINE CAN COMPLETE ANY SPIRAL BEVEL GEAR OR
PINION WITHIN THE MACHINE RANGE IN ONE 360 DEGREE REVOLUTION OF THE BLANK. THIS REQUIRES ONLY ONE SETUP,
ONE CHUCKING, AND ONE CUTTER TO PRODUCE A PART. IN ADDITION TO COMPLETING, THE MACHINE USES
RSR  CUTTERS, AND ALL OTHER GLEASON CUTTING METHODS. FORMATE
GEAR MEMBERS CAN BE CUT, AND MATING PINIONS GENERATED TO MATCH THEM.

FEATURES
1 – THE VARIETY OF METHODS EMPLOYED BY THE 640-SERIES GENERATOR ENABLE THE MACHINE TO CUT THE
FOLLOWING TYPES OF SPIRAL BEVEL GEAR SETS:
COMPLETE GENERATED GEARS
ROUGH GENERATED GEARS
SINGLE ROLL ROUGH PINIONS OF GENERATED OR FORMATE PAIRS
FINISH GENERATED GEARS
ROUGH AND FINISH FIRST SIDE OF PINIONS OF GENERATED OR FORMATE
PAIRS USING ANY SINGLE SIDE MODIFIED ROLL METHOD
FINISH PINIONS OF GENERATED OR FORMATE PAIRS USING ANY SINGLE-SIDE
MODIFIED ROLL TYPE DEVELOPMENT METHOD
COMPLETE FORMATE PAIRS
ROUGH FORMATE GEARS
FINISH FORMATE GEARS (NOT SINGLE CYCLE)

2 – FULLY AUTOMATIC CYCLES SELECTABLE FOR THE FOLLOWING FUNCTIONS
AND/OR FEATURES, INDIVIDUALLY OR IN COMBINATION:
VARIABLE PLUNGE FEED
SLIDING BASE SET-IN
CRADLE ROTATIONAL SET-OVER
NO ROLL CYCLE FOR FORMATE GEARS
VARIABLE RATE OF ROLL
DOUBLE ROLL
DUAL ROTATION FOR GENERATED OR FORMATE GEARS
MODIFIED ROLL
VARIABLE SPEED CUTTER DRIVE
ROLL CENTERING

3 – THE “DUAL ROTATION” FEATURE FOR EITHER “GENERATED” OR FOR “FORMATE” GEARS PROVIDES THE CYCLE WHERE EACH TOOTH-SPACE IN THE PART IS CUT TWICE, ONCE DURING EACH OF TWO ROTATIONS OF THE WORK-PIECE. THE “DUAL ROTATION” IS USED TO IMPROVE OVERALL SURFACE FINISH AND GENERAL PART QUALITY CNC CONTROL
ALLEN BRADLEY 8600 “CNC” CONTROL FOR CUTTER-SPINDLE, CRADLE-ROLL, AND SLIDING-BASE FOR WORK-SPINDLE,
WITH “ELECTRONIC GEAR BOX” (EGB) FOR CONTROL OF WORK-SPINDLE INDEXING, WITH SIMPLIFIED ENTRY OF “GLEASON CUTTING SUMMARY”
DATA, AND MEMORY STORAGE CAPACITY FOR A MAGNITUDE OF DIFFERENT PART NUMBERS. ALPHANUMERIC KEYBOARD WITH
NUMERICALLY CONTROLLED SPECIFIC FUNCTION KEYS OF THE TRADITIONAL TYPE, CONSOLE WITH PUSH-BUTTONS FOR SWITCH-ON, SWITCH-OFF, CYCLE START, HOLD, OPERATING MODE, AND MANUAL MOTION SPEED
DIRECTION SELECTORS AND POTENTIOMETER FOR FEED RATE AND SPINDLE ROTATION VARIATION
12” CRT ALPHANUMERIC AND GRAPHIC KEYBOARD
CNC CONTROL PROVIDES COMPLETE FLEXIBILITY WHEN CHANGING FROM ONE JOB TO ANOTHER, OR WHEN CHANGING
MACHINE SETTINGS, (WITHOUT THE NEED OF CHANGE GEARS).
CNC CONTROL PROVIDES EASIER REALIZATION OF THE “OPTIMUM CUTTING CONDITION” RESULTING
IN FASTER PRODUCTION RATES. DEPENDING ON THE DIAMETER OF THE PART BEING CUT, CYCLE TIMES CAN BE AS SHORT AS
7 SECONDS PER TOOTH, INCLUDING CUTTING, INDEX AND RETURN ROLL OF THE CRADLE.
ADDITIONAL FEATURES
DOUBLE-ACTING HYDRAULIC CHUCKING SYSTEM PROVIDING UNIFORM,
TORQUE-FREE CHUCKING LOAD.
HYDRAULIC POWER UNIT W/ 3-HP MOTOR AND PUMP PROVIDING 7.5 GPM
VOLUME AT 600 PSI, MONITORED BY PRESSURE SWITCH GAUGE
POWER FORCED LUBRICATION SYSTEM WITH 6 GPM VOLUME AT 6-PSI
DRIVEN BY SAME 3-HP MOTOR AS HYDRAULIC UNIT
STOCK DIVIDING GAUGE
FULL MACHINE ENCLOSURE WITH SAFETY INTERLOCK FOR GUARD DOORS
COMPLETE COOLANT PLANT W/5-HP MAIN ELECTRIC MOTOR WITH 190 GALLON
(720 LITERS) RESERVOIR CAPACITY, W/SIGHT-GLASS FOR MONITORING
level
AUGER-TYPE CHIP CONVEYOR AND MAGNETIC CHIP SEPARATOR
FREE-STANDING ELECTRICAL SWITCH-GEAR CABINET W/FULL COMPLEMENT
OF ELECTRICS (MOTORS/CONTROLS)

THIS RADIAL SETTING CAN BE INCREASED TO 18.5” (462.50MM) FOR SOME APPLICATIONS
MAXIMUM OFFSET APPLIES TO PINION AND GEARS UP TO 25” O.D. FOR 34” DIAMETER GEARS MAXIMUM OFFSET IS 1.0”

EXTREME RATIO : 10:1
EXAMPLES OF MAXIMUM GEAR PITCH DIAMETERS WITH 35º GEAR SPIRAL ANGLE
1 X 1 – 28.50” (723.90MM)
2 X 1 – 34.00” (863.60MM)
5 X 1 – 34.00” (863.60MM)
MAXIMUM WORK-HEAD SETTING(S)
FLOOR SPACE REQUIRED (INCLUSIVE OF
HYDRAULIC UNIT, ELECTRICAL PANEL AND CHIP REMOVAL