Liebherr LC502 CNC Gear Hobber

Model
Manufacturer Liebherr
Model LC-502
Serial Number 1104/5
Year of manufacture 1989

Description
This machine is being offered with a full recontrol using a Fanuc 0i-MF Plus and in a fully recertified condition. 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 the test cutting are documented for your viewing.

Mechanical Specifications
Number of CNC controlled axes 6
Number of CNC controlled spindles 1
Pitch rating               1.81 DP 14 Mod
Maximum workpiece diameter 19.685 in 500 mm
Maximum axial travel 15.748 in 400 mm
Worktable diameter 15.748 in 400 mm
Table bore diameter 5.906 in 150 mm
Table bore depth 15.748 in 400 mm

Maximum radial center distance 13.386 in 340 mm
Minimum radial center distance 1.575 in 40 mm

Maximum hob diameter 6.693 in 170 mm
Maximum hob length 9.055 in 230 mm
Maximum hob shift travel 7.874 in 200 mm

Maximum swivel angle -50 deg 50 deg
Hob speed range (Infinitely Variable) 72 to 720 RPM
Hob Spindle Power 41 HP 30.6 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 21605 lbs 9800 kg
Plant power 480 VAC 60 Hz
Total connected load 78 KVA

Length 150.394 in 3820 mm
Width 106.299 in 2700 mm
Height 98.425 in 2500 mm

Features
Servo Tailstock with spring preload pressure
Adjustable Height Tailstock Arm
Power clamping with pressure adjustment
Quick Release Hob Arbor System

Controls
Fanuc OiM-F Plus with all new electrical cabinet
Fanuc Alpha HVi Digital drives
New Heidenhain Feedback Systems

Base Software
Two passes (same or alternating directions)
Inch / Metric switchable
Incremental shifting by part count
Crowning
Taper compensation
Axial or radial/axial cycles
Programmable dwell
Automatic overtravel and approach calculations
Multiple program storage and retrieval

Machine Includes
Integral Coolant Tank
Chip Conveyor
Multiple hob arbors of various sizes
Operation Manuals
Programming Manuals
Maintenance Documentation
2x 31.75mm (1.25″) Hob Arbor
1x 22mm (.866″) Hob Arbor
1x 27mm (1.0645″) Hob Arbor

MTB Recertification Program
Hob head will be checked for problems
Work table drive system checked for problems
Hydraulic system drained and cleaned
All filters changed
Machine will be thoroughly cleaned
All cycles will be tested and verified as fully functional
All worn hoses replaced
All broken electrical wires and cables will be repaired
All defective controls will be replaced or repaired
All features will be tested and verified as fully functional
Coolant system checked for problems
Coolant tank and chip collection system cleaned
All axes checked for accuracy and repeatability
All axes will be re-calibrated for home positions
Machine geometry checked and recorded
Tuning of all axes servos will be verified and adjusted
Sample parts will be cut if requested

The aforementioned description and listing of specifications and accessory equipment is correct and accurate to the best of our knowledge. However, it should not be considered binding in any regard, as we reserve the right to change and/or alter same without prior notice. Consequently the buyer is responsible for confirming same, upon physical inspection and inventory of the machine(s) and all related accessory equipment.