Gear, Hobber (CNC)

LIEBHERR CNC Gear Hobber Gear diameter 250 mm, module 5

MACHINE REF :11411

Wanted Machines — . Gear, Hobber (CNC)

MAKE :LIEBHERR CNC Gear Hobber

MODEL :Gear diameter 250 mm, module 5

LIEBHERR CNC Gear Hobber LC 255, gear dia 254 mm, module 8

MACHINE REF :15520

Machines For Sale — . Gear, Hobber (CNC)

MAKE :LIEBHERR CNC Gear Hobber

MODEL :LC 255, gear dia 254 mm, module 8

CONTROLLER :LIEBHERR

FURTHER SPECIFICATION :Max gear diameter 254 mm Max module 8 Max pitch 4 DP Max hob slide travel 254 mm Work table diameter 254 mm Master worm wheel (Pitch Diameter) 285 mm Hob head swivel +/- 50 deg. Max hob diameter 144 mm Max hob length 200 mm Max tangential/shifting travel 170 mm Min/max height above table 140/390 mm Min mumber of teeth 6 Hob spindle speeds range 64-460 rpm Total connected power, approx. 40 HP Machine weight 6500 kg

LIEBHERR CNC Gear Hobber, good condition LC 153, gear dia 200 mm, module 6 (2001)

MACHINE REF :16043

Machines For Sale — . Gear, Hobber (CNC)

MAKE :LIEBHERR CNC Gear Hobber, good condition

MODEL :LC 153, gear dia 200 mm, module 6

YEAR OF MANUFACTURE :2001

CONTROLLER :SIEMENS

Liebherr L 3002 Cnc gear hobbing machine [Complete rebuild and upgrade ] L 3002 (1982)

MACHINE REF :12925

Machines For Sale — . Gear, Hobber (CNC)

MAKE :Liebherr L 3002 Cnc gear hobbing machine [Complete rebuild and upgrade ]

MODEL :L 3002

YEAR OF MANUFACTURE :1982

CONTROLLER :New OMRON Trajexia motion controller, CJ2m PLC, an

SPECIFICATION :Liebherr L 3002 Cnc gear hobbing machine [ Max wheel Gear Ø 3500 mm ] Max wheel Gear Ø 3500 mm Module + 40 Module - CNC type New OMRON Trajexia motion controller, CJ2m PLC, and SIE Max spindle speed Max gear width Max workpiece weight 43 kg Motor power 63 kW ------------------- Length x width x height - × - × - Weight - Worked power hours State like new At local norms --------- Status under power

DESCRIPTION :Machine suitable for heavy-duty Hobbing of external spur & helical gears, pinions, splines, worm gears, and other work-pieces of similar profile up to 138” (3500mm) diameter, with motorized hob-head providing a maximum of 40 Module (.5 DP) cutting capability in steel Serial No. 2301/01 (New in 1981/82 electrical up-grade 2016) The machine was in storage for a number of years and has seen extremely few hours of actual use. The machine is in superlative mechanical condition throughout, and has recently been fitted with new generation electrics, overhauled motors, and programmable logic control for axial and radial feeds, and selectable fully automatic cutting cycles. The machine features can be described as follows: EQUIPMENT / FEATURES: •Single piece base machine bed including wide, fixed position work-table •Single start index worm drive in special-execution, index worm-wheel of special bronze •Machine main stanchion with infinitely variable radial feed, automatically clamped while in working position •Programmable hobbing depth; shut-off precision: 0,01mm •Hob slide w/steplessly variable mechanical feed drive. Backlash-free drive to hob slide for conventional or climb hobbing thru preloaded ball-screw. •Hob spindle motor (DC) variable speed, geared to 75kW main drive motor •Differential mechanism for hobbing of helical gears •Universal, heavy-duty hob-head for radial, axial, and tangential hobbing. When hobbing radially or axially, the tangential slide is automatically clamped. The tangential slide is positioned thru a servomotor, linked to work-table. •Power motorized swivel of hob-head •Rapid traverse for axial, tangential, and radial movements •Complete hydraulic installation with outboard hydraulic power plant •Hydraulic table relieving arrangement •Outer support stanchion for work holding bushings. The steady support in hydraulically positioned and in its uppermost position may be swung out of the way. In working position it is clamped in place. For workpieces over 1700mm diameter, the outer-support stanchion may be hydraulically retracted on its sub-base •Adjustable “clam-shell” steady-rest type tailstock for support of for the cutting of heavy pinions in vertical execution •Automatic pressure lubrication and oil bath lubrication system •Automatic central lubrication for all sliding ways, w/telescoping stainless steel way-guard covers for axial and radial slides •Cooling systems with splash guards, coolant tank capacity: approx. 1,000 liters; delivery: 200 litres/minute ( electrics and control features ) •Complete electrical equipment installation (all motors professionally overhauled 2016) (currently arranged for 415 volt, 3-phase, 50Hz operation) •New OMRON Trajexia motion controller, CJ2m PLC, and SIEMENS MP277 HMI with operator’s conversational data input for control and programming of cycles •Free standing control cabinet with new electrical switch-gear •Pendant control station with SIEMENS HMI controls for all working elements •Conventional, Climb, and Tangential hobbing capability •Multi-cut program for the automatic setting of the hobbing depth position and change of hob speed between No. 1 and No. 2 cut when axial hobbing, including reduction of hob slide travel for the 2nd cut, ( programmable for up to five cuts ). •Automatic “Single-Index” milling for spur and/or helical gears using disc-type form milling cutters, or inserted carbide-blade cutters •Crowning and taper hobbing via point to point ( additional equipment ) •Machine with chip transporting/conveying system •Operator’s catwalks alongside the length of the machine and main column with operator’s stairway •Four (4) hob arbors, (1-1/2”, 2”, 2-1/2”, and 3” diameters), hardened & ground, complete with rings and lock-up nuts •Large assortment of index change gears