Description
HÖFLER Porta 3500 CNC Spur/Helical Internal/External Gear Grinding – Year 2007
suitable for the precision,
finish grinding of both internal and external spur and helical gears up to 137.8” (3500mm) maximum diameter
General Specifications:
Machine Type: CNC Gear Grinding Machine
Model: HÖFLER Porta 3500
Year of Manufacture: 2007
Serial No. 928 (New 2007)
Technical Specifications:
Workpiece Specifications:
Maximum Workpiece Diameter: 3500 mm
Maximum Module: 40 mm
Maximum Face Width: 1400 mm
Maximum Workpiece Weight: 30,000 kg
Grinding Wheel Specifications:
Diameter: 350 mm to 400 mm
Width: 160 mm to 200 mm
Bore: 127 mm
Grinding Capabilities:
Type: Spur, Helical, Internal, and External Gears
Grinding Accuracy: Achieves DIN 1-2 for both profile and lead
Axes and Movement:
X-Axis (Radial): 2500 mm
Y-Axis (Tangential): 1500 mm
Z-Axis (Vertical): 1400 mm
C-Axis (Rotary Table): Continuous
A-Axis (Helix Angle): ± 45 degrees
CNC Control:
Control System: Siemens 840D
Other Features:
Cooling System: Integrated
Dressing Unit: CNC controlled for precise wheel shaping
Loading System: Optional automatic loading and unloading system available
These specifications provide a comprehensive overview of the capabilities and features of the HÖFLER Porta 3500 CNC gear grinding machine.
The machine is of the later generation HÖFLER Porta series “traveling gantry“ machine design, and has been found to be in first class condition throughout, having had only 6,800 hours of total use since initial installation. Arrangements for the physical inspection of the machine, can be made by appointment, with one week’s prior notice.
Maximum tip circle diameter (external grinding) …………………137.8”(3500mm)
Minimum root circle diameter (external grinding) ………………. 3.9”(99.06mm)
Maximum tip circle diameter (internal grinding) …………………. 31.5”(800.1mm)
Maximum root circle diameter (internal grinding) ………………… 129.9”(3299.46mm)
Maximum diameter workpiece …………………………………….. 137.8”(3500mm)
Maximum number of teeth ground ………………………………… unlimited
Maximum tooth profile height ……………………………………….. 3.15”(80.01mm)
Maximum diametral pitch (module) ………………………………… 1.34 DP(20 module)
Maximum helix angle ………………………………………………… +/- 45˚
Maximum grinding stroke (external grinding) ……………………… 65”(1651mm)
Maximum grinding stroke (internal grinding) ………………………. 47.2”(1199mm)
Equipped with:
* full machine enclosure with power operated guard doors
and oil-mist exhaust system
* SIEMENS 840-D “CNC” control with gear grinding software for grinding
spur and helical, internal and external gears
* machine integrated gear inspection system for profile, lead and spacing
(fp, fu and Fp) checks of external and internal gears from module ≥1 mm,
including the HÖFLER inspection and evaluation software.
* complete coolant plant with filtration unit and chiller system
for grinding and hydraulic oil
* SMW “Accusmart-65” diameter rotary work-table
* two (2) grinding spindles
-grinding spindle for spur and helical, internal and external gears
with CNC dressing unit
-stroke slide with ID / OD face-grinding spindle with dresser
* assorted auxiliary work-tables, work-fixtures, and chucks,
including table mounted work support bracket-segments for
larger diameter work-pieces
* full complement of electrics (motors/controls), with air-conditioned
switch-gear cabinet, all buss-ducting and connection cables
(currently arranged for 480 Volt, 60Hz operation)
* misc. wrenches, spanners, operator’s tools with cabinet
* machine leveling shoes
* full machine documentation (operator’s manual for machine and controller,
parts list, electrical and hydraulic diagrams, etc.)
