NEW 2007 HOFLER Porta 3500

We are pleased to offer a rare opportunity to acquire a HÖFLER Porta 3500 CNC Gear Grinding Machine, a high-capacity later-generation traveling gantry machine designed for precision spur and helical gear grinding, internal and external grinding applications.

The machine is offered “As Is” with limited use history and reasonable flexibility on pricing.

Machine Overview

The HÖFLER Porta 3500 is a later-generation traveling gantry CNC gear grinding machine designed for the precision finish grinding of large external and internal spur and helical gears. It is capable of grinding gears up to 3,500 mm (137.8”) diameter with exceptional accuracy and productivity.
Serial Number: 928
Year of Manufacture: 2007
The machine has accumulated only approximately 6,800 operating hours since installation and is considered to have very limited use.

Main Technical Specifications

* Maximum external gear diameter: 3,500 mm (137.8”)
* Maximum internal gear diameter: 3,500 mm (137.8”)
* Minimum internal gear diameter: 800 mm (31.5”)
* Maximum module: 36 Module (0.7 DP)
* Maximum tooth profile height: 80 mm
* Maximum helix angle: ±45°
* Maximum workpiece weight: 40,000 kg (88,000 lbs)
* Machine table diameter: 2,350 mm
* Total machine weight: 90,000 kg (198,000 lbs)
* Installed power: Approximately 200 kVA

Machine Highlights

* Later-generation traveling gantry design with mineral cast structure for exceptional rigidity and thermal stability
* Direct-drive torque motor rotary table with hydrostatic bearings for backlash-free positioning
* SIEMENS SINUMERIK 840D CNC control with HÖFLER GearPro software
* Fully automatic grinding wheel balancing system
* Automatic touch grinding and stock determination
* High-precision integrated gear inspection system
* CNC-controlled dressing system with diamond dressing rolls
* Hydraulic grinding spindle with 45 kW drive
* Automatic lubrication and temperature-controlled hydraulic and grinding oil systems
* Complete machine enclosure with oil mist extraction
* Automatic water chiller for thermal stability

Special Equipment

* Integrated gear inspection system for profile, lead, pitch and spacing measurement
* Software for grinding special tooth geometries and non-involute profiles
* Double-helical (herringbone) gear grinding software
* Runout alignment grinding system
* Thrust bearing inspection system
* Emergency power backup system
* Vacuum grinding oil filtration system with oil chiller
* Attachment for internal, external and face grinding

Control System

* SIEMENS SINUMERIK 840D CNC
* SIEMENS SIMODRIVE 611D digital drives
* Windows-based HÖFLER GearPro operating software
* Job preparation software for offline programming
* Automatic profile and lead correction
* Storage capacity for more than 1,000 grinding programs

Documentation

The machine is supplied with:

* Complete operating manuals
* Maintenance manuals
* Electrical documentation
* Parts manuals
* Machine drawings
* Available technical documentation

Condition Information

The main hydraulic drive motor has been fully refurbished and is included with the machine; however, it has not yet been installed. This currently limits machine movement and operation.

After installation and commissioning of the hydraulic drive motor, the machine has the potential to return to full operating condition.

The machine is offered in its current “As Is” condition, and reasonable offers will be considered.

Video Preview: https://youtu.be/bsYnevxH5Rw

Price: on request

Additional Support Services

We can provide:

* Packing list for shipping preparation
* Assistance with professional dismantling and export packing
* Optional sea freight arrangements under a separate agreement

HÖFLER-KLINGELNBERG Service Department may provide supporting assistance, including:

* Troubleshooting support
* Assistance with settings and adjustments
* Technical guidance based on available documentation
* Provision of existing technical documents and machine information related to the Porta 3500-928 model

All documentation and technical support are provided for reference and assistance purposes only.

For customers in China, installation support can also be arranged under a separate service agreement.

Please contact us for additional technical information, inspection arrangements, or commercial discussions.