22" Grinding Wheel Diameter

42" Magnetic Chuck Diameter, Approximately 3/8" Chuck Step

44" Swing Inside Water Guards

24" Vertical Range,Standard

3000 LBS. Maximum Load on Chuck

50 HP Grinding Wheel Horsepower

480 Volt /60 Hertz Main Motor

Machine Dimensions: 12'L-R x 57"D x 103-1/2"H

Electrical Cabinet: 73"L-R x 40"D x 91"H Approximate

Approx. Weight: 16,000 lbs.



Re-manufactured Blanchard Model 22A-42 All Electric, Vertical Spindle Rotary Table Surface Grinder

Basic Machine:

Range:  48" diameter swing inside water guards by 24" high over 42" diameter

magnetic chuck with new segments.  (The grinder can grind to the center of a 48"

diameter part utilizing "step grinding" techniques.



Base and Ways:  Double wall rigid seel, annealed weldment with Sludge Dragout Conveyor for easy sludge removal. Replaceable, rectangular, precision ground steel

ways mounted on base.  Spread of ways is 38-1/2".  Full-length steel way covers

provide protection from grinding sludge.



Table Body: Heavy, double wall, ribbed design, cast of close grain iron, carries

chuck.  Rotation drive is through heat-treated spiral bevel gears.  Alloy steel pinion

drives 24-1/2" diameter chuck rotation gear.  Table ways are precision hand scraped.

Low friction, non-metallic, table bearing extends life of chuck bearing and reduces

start-up power requirement.



Magnetic Chuck: Blanchard one-piece steel magnetic chuck, 42" diameter, with

5/8" concentric pole spacing and 2" center hole.  Magnetic chuck uses direct

current only, 115 volts DC, supplied by variable DC power supply.  The DC power

supply, with remote control. provides the feature of infinitely variable magnetic

chucking holding power (0 to 60%) and full power (100%).



Precision flat circular bearing runs submerged in oil in table body.  Workload up to

3000 pounds can be carried on magnetic chuck.



Table Traverse: By rack mounted on underside of table body, with pinion, through a 

worm gear reduction box and direct-coupled high torque reversing motor.  An electric

brake on the motor provides positive stop.



Chuck Rotation:  Infinitely variable chuck rotation speed from 6 to 24 revolutions

per minute.  Chuck rotation is driven by a 5 HP motor controlled from the operator's

panel.  Speed may be changed during the grinding cycle without interrupting the

grinding cycle.



Wheel Head: A ribbed iron casting is the housing for the main spindle motor and 

encloses and aligns the oversized spindle bearings.   The 50 HP main spindle motor

consists of a commercial stator built into the head and a commercial rotor built on a 

large Blanchard spindle with special ventilation.  The anti-friction spindle bearings

are pre-loaded to 1,200 pounds to remove radial clearance and backlash.  Large

head ways are fitted with three tapered gibs running the full length of the head ways.

A manually operated wheel dresser is mounted to the head and provides a means of

artificial wheel wear under control of the operator.  A wheel guard is  standard 

equipment.  



Grinding Wheel Equipment:  Cortland Style Segment Wheel Holder.  Wheel holder uses five CDTL (11-1/4" by 3" by 6") segments per set.



Column: The heavy rigid box section column has precision vertical ways.  A large 

diameter feed screw is mounted between the ways to move the gibbed way wheel 

head.  This design provides as nearly as possible a "one-piece" construction.  There

is no intermediate plate and no loose joints to allow vibration between the head and

column.



Three Point Column Support:  The Blanchard column contacts the base at three

widely spaced points to provide quick, accurate, adjustment of the grinding spindle

relative to the magnetic chuck.  Three heavy bushings are threaded into the column

with calibrated washers to facilitate adjustment. Large hold-down bolts threaded

into the base assure rigidity and provide single unit construction of the head, column

and base to resist deflection under heavy grinding pressures.



Feed System: Fanuc vertical power down feed system utilizes an AC

Servo Drive motor with an absolute position encoder feed back system that does

not require home or over-travel switches.   Feed may be "continuous" at a pre-set

rate or the system may be set to use a "burst" technique to provide the traditional,

proven, Blanchard impulse feed.  Coarse feed rates for roughing and fine feed

rates for finishing are available in either the "continuous" or the "impulse" mode.

Course feed rates from .001 to .100 inches per minute.  Fine feed rates from .0001

to .010 inches per minute.  The coarse to fine change over point is from .000 to

.010 inches above the zero point.  Inch or metric switching is available.  Feed range 

.000 to 9.999 inches or .000 to 99.99 millimeters.  The operator panel will include

the Fanuc Power Mate Oi-TD control with a 7.2 inch monochrome LCD display.  The

magnetic chuck controls and the machine operator switches are also mounted on 

the panel.



Water Guards: 7 gage sheet steel water guards enclose the grinding area to 

confine coolant and control mist.  The table water guard moves with the table to 

reduce the open area during grinding for better mist control.  Interlocking doors

open to provide straight-in loading of work parts.  The column ways are protected in

the grinding area by telescoping steel guards.



Coolant System: "Wet" base design, Drag out sludge
conveyor, coolant pumps and control for pumps are supplied as standard
equipment.  Quick acting water valves, a solenoid valve and a wash hose
are standard equipment.



Lubrication: Table and chuck bearing and table traverse gear box have oil 

reservoirs.  An Automatic TRABON grease lubrication is provided for lower spindle

bearing, column ways, feed screw, wheel dresser and base ways.



Electrical Equipment



Motors:

50 HP 720 RPM Built-in main Spindle Motor with Soft-Start and Dynamic Braking

5 HP TEFC Chuck Rotation Motor AC variable frequency spindle drive motor

AC servo motor for Head Feed and Rapid Traverse

AC servo motor with an electric brake for Table Traverse



Control Panel:  Control Panel: Machine mounted NEMA 12 enclosure contains reduced 

voltage starting and braking unit for wheel motor.  Cabinet also contains programmable

controller, cycle controls, control transformer to provide 115 volt push button circuit

and non-fused disconnect switch interlocked with door.  Machines comply with National

Fire Protection Associates Standand No. 79  for Metalworking Machine Tools and Plastics

Machinery.



Note:

1.  F.P. Miller Company recommends that an independent, driven, ground rod be supplied 

     for this equipment.

2.  Supply voltage must be maintained within +/-5% of rated voltage.



Other Electrical



Equipment:

Operator's push button control station set up station, sensitive load meter in wheel

motor circuit to indicate the load on the spindle motor, limit switches, safety interlocks

and DC control pilot light.



Notes:



General: An Operator's manual with parts catalog, a Column adjusting wrench and an

Outside shuck ring are supplied with the grinder.



Paint:  Standard colors are Swiss White, Steel Blue, Machine Tool Gray or Vista Green.

When a special color is requested please contact factory for extra charge to comply.



Electrical Requirements:  

3 Phase, 60 Hertz, 460 Volts

50 HP -- 65 KVA



Approximate Floor Space and Height:  Length: 140"; Width: 69"; Maximum

height: 109"; Minimum height:  105"; Height of magnetic chuck from floor:  38".



Control panel is approximately 72" x 18" 72".



Weight:  Grinder with standard equipment:  17,800 pounds.  Domestic shipping

  weight:  18,300 pounds.



TERMS:  30% with purchase order

60% after acceptance r

This machine is listed for sale by F.P. Miller Company located in Jackson, Michigan