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CNC MACHINERY & EQUIPMENT
GEAR HOBBING MACHINERY (HOBBERS), CNC

Liebherr #LC255, 5-Axis, gear hob, 3.937" bore diameter, Fanuc 18i-MA, rebuilt /retrofit 2006

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General Specifications


Manufacturer: Liebherr
Model: LC- 255
Stock #: 10343
Price: Request a Price

Dealer Information


Wisconsin Metalworking Machinery
2207 S West Ave
Waukesha, WI 53189-7920

Contact: J.R. Kraemer
Tel: 262-548-6080
Fax: 262-548-6094
Email: chuck@wismet.com

Gold Level Dealer Since 1986
Website: www.wismet.com

View our Equipment Listings

Detailed Product Description


specifications:

This machine was recontrolled by Machine Tool Builders in 2006 with a Fanuc 18i-MA CNC and Fanuc Alpha series digital drives and motors. An entire new electrical cabinet was installed along with all new equipment inside the electrical cabinet. All support, service, parts, and training are still available through Machine Tool Builders. Machine upgrades, software additions or other machine modifications or tooling that might be required are also available through Machine Tool Builders. The software in the machine is fully conversational based so the simple question and answer format allows quick and easy programming of all spur and helical gears within the machine size and DP rating.


Number of CNC Controlled Axes: 5
Number of CNC Controlled Spindles: 1
Pitch Rating: 4.23 DP: 6 Mod
Maximum Workpiece Diameter: 9.843 in 250 mm
Maximum Axial Travel: 9.843 in 250 mm
Worktable Diameter: 9.843 in 250 mm
Worktable Worm Diameter: 11.220 in 285 mm
Table Bore Diameter: 3.937 in 100 mm
Maximum Radial Center Distance: 8.071 in 205 mm
Minimum Radial Center Distance: 0.787 in 20 mm
Maximum Axial Height from Tabletop: 15.354 in 390 mm
Minimum Axial Height from Tabletop: 5.512 in 140 mm
Maximum Hob Diameter: 5.709 in 145 mm
Maximum Hob Length: 9.055 in 230 mm
Maximum Hob Shift Travel: 6.693 in 170 mm
Maximum Swivel Angle: -45 deg  45 deg
Hob speed range (Infinitely Variable): 48 to 480 RPM
Hob Spindle Power: 10.7 HP 8 kW
Rapid traverse radial: 118.110 in/min 3000 mm/min
Rapid traverse axial: 78.740 in/min 2000 mm/min
Rapid traverse tangential: 39.370 in/min 1000 mm/min
Machine Weight: 14991 lbs. 6800 kg
Plant power: 460 VAC 60 Hz

Features
Tailstock with pressure adjustment
Power clamping with pressure adjustment

Controls
Fanuc 18i CNC
Fanuc Alpha Digital Servos

Base Software
Three passes (same or alternating directions)
Hobbing of four sequential gears in one cycle
Inch / Metric switchable
Incremental shifting by part count
Crowning with high point offset capability
Taper compensation
Axial or radial/axial cycles
Radial only cycle
Programmable dwell
Automatic or manual overtravel and approach calculations
Tool offsets for quick size changes
Workpiece counter
Multiple program storage and retrieval
Shifting with table compensation
Auxiliary function selection (tailstock/clamping seq.)
Automatic or manual hob swivel angle calculation

Optional Software
Taper root cycle
Double helical (herringbone gears)
Size correction by measurement over pins or span
Single indexing cycle
End relief cycle
Automatic stock division cycle
Custom crowning cycle
Dip cycles

Machine Includes
Integral coolant tank, with magnetic conveyor
One set of leveling wedges
No Hob Arbor, But, one of your desired diameters can be provided if required, call for details.
Two copies of the operations manuals
Two copies of the maintenance documentation
30 Day return warranty on the machine

MTB Optional Recertification Checks and Repairs
Hob Head, Table and Axes checked for problems
Tailstock and Power Clamping checked for problems
Guarding and Safety Systems checked for problems
Hydraulic and Coolant system drained and cleaned
All filters changed
Machine will be thoroughly cleaned
All cycles were tested and are fully functional
All worn hoses, cables, wires, sensors etc. replaced
Sample parts have been cut

The machine is being offered in "as-is" condition. We can also offer it as recertified or with a full rebuild (call for details). All recertified machines are fully cleaned. All moving slides, spindles, and parts handling systems are inspected for problems. Any gibs or adjustable backlash systems are adjusted to the best possible settings. All hydraulic, coolant, lubrication and pneumatic systems are checked for proper functionality and leaks. All filters are replaced. All worn hoses, broken cables, connectors, buttons, lamps and wires are replaced. All guarding is installed and checked. All machine cycles are tested. Parts are cut to verify the machine capability. Charts from test cutting are documented for your viewing

AS-IS condition means the machine will be cleaned and checked for operational capability without test cutting taking place. All cycles and all features will be verified for functionality.