LIEBHERR MODEL L-652 UNIVERSAL GEAR HOBBING MACHINE

BASIC MACHINE FEATURES
Machine bed with stationary table assembly, table spindle equipped wi
th radial and axial
anti-friction roller bearings
Single-start indexing gear, worm wheel of bronze, dual lead worm
Machine main column with infinitely variable radical feed, via DC dri
ve and
pre-loaded recirculating ball screw, column automatically lock
ed in working position
Tailstock column with hydraulically actuated tailstock arm, automatic
ally locked in
working position
Axial feed infinitely variable via SCR-controlled DC drive and pre-lo
aded recirculating
ball screw
Differential for hobbing helical gears
Automatic cycle for climb or conventional hobbing
Rapid traverse for all set up motions
All Electric motors T.E.F.C.B.B.
Complete hydraulic equipment installed on the machine
Automatic pressurized circulating lubrication with electric pump and
filter for all
rotating parts
Automatic lubrication for all guideways
Coolant unit with pump (40 GPM capacity) and magnetic separator, tank
capacity
80 gallons also sliding door splash guards
Safety interlock on splash guard and gear box door
Machine prepared for connection to chip conveyor

- OPTIONAL FEATURES
One hob arbor, hardened and ground complete with spacers and lock nut
, ASA thread
One tailstock guide bushing for work arbor
One work area lamp
Operator's manual, parts list
Shifting hob head for axial and radial hobbing with automatic increme
nt hob shift after
each work cycle, preselectable in both directions. Shifting s
lide automatically
locked during work cycle. Maximum shifting travel 7.87"
Machine DC main motor, 16 HP, T.E.F.C.B.B. for infinite
ly variable
hob speed, within range specified, using silicon controlled re
ctifier located in
control cabinet
Complete electrical control equipment
Large assortment of change gears
Automatic two-cut cycle for roughing and finishing in one operation.
Automatic change
of hob speed and feed between first and second cut. Automatic
change of feed
directions between cuts. Hob speeds, feeds, and feed directio
ns preselectable
on operator's panel
Hydraulic copy hobbing device providing "crowning capability" and cap
ability of hobbing
concave, convex, and tapered teeth
Hydraulic clamping device with infinitely variable clamping pressure
up to 22,000 lbs.,
mounted below machine table for actuating workpiece clamping f
ixture
Chip conveyor with magnetic chip transfer and permanent magnetic sepa
rator arranged
alongside the machine, 34" (860 mm) discharge height conveyor
speed 25 ft./min.