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Liebherr LC-255 S/N 0214/3,

Year 1985

 full recertification and recontrol

 

As with all used equipment MTB places for sale, this machine will be totally cleaned, hydraulic and coolant systems drained and cleaned, all gib adjustments were checked, all worm lashes were adjusted, all broken or missing parts were replaced, all oil leaks repaired and then the machine was fully recertified using the ISO/DIN 6545 alignment standards for gear hobbing machines.

 

The controls on this machine were too worn out to be serviceable any longer, so this machine will be recontrolled with a new GE Fanuc 18i-MB CNC with GE Fanuc Alpha HVi digital servo drives and motors.

 

 


 

 

 

 

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Past Project

Machine Mechanical Specifications:

Pitch rating depending on application 4.2 DP Mod 6.0 mm
Maximum workpiece diameter 10.039" 250 mm
Maximum axial travel 10.039" 250 mm
Maximum center distance 8.070" 205 mm
Minimum center distance .787" 20 mm
Work table bore 3.937" 100 mm
Maximum hob diameter 5.708" 145 mm
Maximum hob length 9.055" 230 mm
Hob shift length 7.874" 200 mm
Minimum number of teeth 6
Radial Rapid 94.488"/min 2400 mm/min
Axial Rapid 59.055"/min 1500 mm/min
Tangential Rapid 39.370"/min 1000 mm/min
Main motor power 10 HP 7.45 kW
Maximum helix angle +/- 45 Deg.
Hob speed range, infinitely variable 48-480 RPM
Plant Power 460VAC
Machine weight 20,000 lb. 9,071 kg

Machine Controls Specifications:
 

  • GE Fanuc 18i-MB CNC
  • GE Fanuc Alpha HVi digital servos and motors
  • Conversational programming
  • Five CNC controlled axes
  • One CNC controlled spindle
  • Programmable feedrates and RPM's
  • Multi-cut cycles
  • Crowning, Offset Crowning and taper compensation
  • Axial, radial/axial and radial cycles
  • Tangential cycle
  • Index controlled by CNC
  • Helix controlled by CNC
  • 460V plant power

Machine Equipment List:
 

  • Chip conveyor
  • Leveling wedges
  • One 1.25" hob arbor, outboard bearing, arbor wrench
  • Two copies of the machine operators manual
  • Two copies of all electrical and mechanical prints
  • One full year warranty on the recontrol
  • Tooling available upon request


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7723 Burden Rd. - Machesney Park, Illinois 61115
Phone: (815) 636-7502 Fax: (815) 636-5912
info@machinetoolbuilders.com
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