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120" Gray, vertical boring mill, 132" swing, 296" machine height, 40" face, 172,000 lbs max load capacity

Manufacturer: Gray
Year: 1973
Table Diameter: 120.0
Stock # 235

For Sale by Johnstown Specialty Castings, Inc.

Gold Level Dealer
Surplus Record Dealer Since 1969
  Bobbie Peltzer
  814-53...> Show Seller's Phone Number 814-535-9001 Let the seller know you found their listing on Surplus Record!


Machine Specifications (per GRAY manual)
Table Diameter 120"
Maximum swing 132"
Maximum Machine Height 24'-8"
Rail 40" Face
Right Hand, Ram Type, Nonswivel, with fixed 4 position qualified tool block for 2" tools.
Left Hand, Ram Type, Nonswivel, with fixed 4 position qualified tool block for 2" tools.
Maximum Height under Rail Head Saddle 102"
Minimum Height under Rail Head Saddle 24"
Dimensions - Both Right and Left Hand Heads
Maximum Height under Tool Block 90"
Vertical Travel:
Ram Slide below Saddle 72"
Horizontal Travel:
Ram Head to Table Center 74"
Ram Head past Table Center 1"
Smallest Hole Tool Block will Enter 16-1/2"
Ram size 12" X 12"
Feed Range 0.01 to 120 IPM
Table 120" Diameter
Load Capacity 172,000 @ Max RPM
With set of (4) 14" Face Plate Jaws
Table Drive Two Range
Table Speed - Infinitely Variable:
High Range - 16.2 to 50 RPM Constant HP
Low Range - 6.5 to 20 RPM Constant HP
Overall - 1 to 50 RPM
Table Drive - Reversing SCR Type
125 HP @ 650 RPM Motor Base Speed
General notes:
Serial number: 9837
Original installation date: September 1973
NC Control is a GE 7500 NC of early 1970 era.
The magnetic control and Table Drive is of the same era.
The Heads and Rams have Hydraulic Servo Motor Drives, these would typically require a
retrofit to Digital AC Servo Motors, new Table drive and motor as well.
In short, totally new electric controls needed.
Left head is not operational, believed to be mechanical problem.

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