fellows 20-8 cnc gear shaper , 8" stroke , 6 axis CNC controls fanuc , contact us today !!

Fellows CNC Hydrostroke Vertical Gear shaper
Model 20-8 s/n 36269

Machine was Retrofitted & Remanufactured by Vermont Machine Tool in 1996
Control used By Vermont was a Fanuc 15M and we can offer a 1 (one) year warranty
on Fanuc parts

Retrofitted/Rebuilt FELLOWS model 20-8 "HYDROSTROKE" 6 Axis CNC Gear Shaping Machine
suitable for the cutting of internal/external spur and helical gears, splines, pinions,
and other work pieces of similar profile up to 20" pitch diameter.
The present Hyperloop system was replaced and retrofitted with a Fanuc 15M 6-Axis"CNC"
Controller. The upper and lower worms and wheels will be inspected, and adjusted for
proper back-lash and bearing pattern. All broken parts replaced, machine will be cleaned,
checked, cycled, and painted ready for an under power demonstration.

PRINCIPLE SPECIFICATIONS:

Maximum diameter external gear 20"
Maximum diameter internal gear 20"
Maximum diametral pitch (spur and helical) 3" DP
Maximum face width 8"
Maximum helix angle (with proper guide and 7" cutter) 40 deg
Work table diameter 19.625"
Work table spindle bore diameter 9.055 " (230mm)
Maximum Fixture Diameter inside chip pan 25”
Maximum Fixture Diameter outside chip pan 29.5”
Maximum load on worktable 2,000 lbs
Maximum distance centerline of cutter spindle
to centerline of work spindle 16.125"
Minimum distance centerline of cutter spindle
to centerline of work spindle .8”
Maximum distance from work spindle face to bottom of
cutter spindle in maximum upper position 21.50"
Dimensions
- Length 84"
- Height 120"
- Depth 72"
Machine net weight, approx 24,000 lbs

EQUIPMENT FEATURES:
The Hyperloop system has been replaced with a Fanuc 15M 6-Axis "CNC" Controller
motors and Drives

The Fanuc CNC will control the following axis:
Work table rotation (no change gears required)
Cutter spindle rotation
Work table infeed
Cutter spindle stroking speed
Stroke position
Stroke length adjustment (from CNC controller, not the top of machine)
Manual pulse generator-(MPG) controls all six “CNC” axis including stroke length
adjustment
Both work and cutter spindle have rapid rotation for indicating purposes
Four cut capability selectable for 1-cut, 2-cut, 3-cut, & 4 cut operations
with stroking speed, depth feed rate, depth of cut and rotary feed infinitely
variable and preset for each cut
High output, quick return, infinitely variable stroking drive with adj,return ratios as follows:
12 to 300 SPM at 2:1 ratio
12 to 250 SPM at 3:1 ratio
Rotary feed: The custom software on the Fanuc controller allows direct input of
rotary feeds for each cut
Digressive Infeed (infeed per stroke diminishing from a preset high value at
beginning of cut to a preset low value at depth)
Adjustable cutter positioning at top of stroke
Crowning and taper capability via back off cam
Complete "Hydrostroke" hydraulic power unit
Constant pressurized lubrication to all working elements
Mechanical straight spur guide for cutter spindle
Cutter spindle adaptor
Guards, covers, misc.
Operators manual, parts list, wiring & hydraulic diagrams
The machine is wired for 480V 3 phase
Magnetic chip conveyor
Fully air-condition electrical cabinet

PROGRAMMED FEATURES:
CNC controller has Macro screens for “Operator friendly” question and answer
setups. No Programming Needed.
One to four cut selected by CNC controller
Setups can be stored in nonvolatile memory.
Each cut has individual parameters for:
Depth of cut
Infeed rate
Stroking speed
Rotational feed rate
Degree of work rotation

Machine is equipped with the following :
Fanuc 15 M 6-Axis CNC control motors and drives
Special Mounted work table with self centering chuck fixture
12" riser assembly
Chip conveyor
Coolant tank
Electrical panel w/ A/C units
Hydraulic unit with Heat exchanger

Machine was rebuilt by Vermont machine tool in 1996 . It can now be inspected in our
NC plant under power in very good mechanical condition with proper notice.

Please contact us to set up an inspection today or go to www.PiselliEnt.com to view
more of our gear machine inventory