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Products Overview: External and internal gear-grinding machines (400 mm to 3,500 mm diameters).
Web Site: www.hofler.com
| HELIX 400 | HELIX 700 | PROMAT 400 |
Gear diameter | 400-10 mm (15.8-0.4") | 700-20 mm (27.6-0.8") | 400-10 mm (15.8-0.4") |
Grinding stroke | 210 mm (8.3") | 350 mm (13.8") | 210mm (8.3") |
Helix angle | +/- 45 degrees | +/- 45 degrees | 0 degrees |
Grindable module |
0.5-10 mm (DP 50.8-2.5) |
1-15 mm (DP 25.4-1.7) |
0.5-10 mm (DP 50.8-2.5) |
 HELIX 400 & 700 - Form Gear Grinders
The design of these robust machines guarantees accuracy and repeatability from the very first gear. Using a powerful 20-HP, water-cooled servo motor that is coxially mounted on a 120 mm (4.7") grinding spindle, the machines use a large 400 mm (15.8") grinding wheel and high pressure oil to provide exteremely fast grinding times. Additionally, a large 160 mm (6.3") universal diamond dressing roll, with an 80 mm (3.2") dressing spindle, provides rigidity, high accuracy and extremely long tool life.
The universal diamond dressing roll is positioned directly behind the grinding spindle for ultimate accuracy and repeatability. For dressing, the grinding slide moves the wheel into the dressing position and performs the infeed motion while the dresser slide provides the cross feed. The dressing cycle is extremely fast, accurate and repeatable. For grinding, the swivel table with the grinding wheel and dressing roll is positioned at the helix angle and locked. The gear, which is mounted on the worktable, performs the indexing and stroking motions. During dressing and grinding, temperature-controlled high-pressure oil coolant is applied with special nozzles to the wheel, gear and dressing roll. A grinding oil processing unit and a full machine enclosure with oil mist collector under the machine are standard accessories.
PROMAT 400- Spur Gear Grinder
The Promat 400 is specifically designed for the grinding of non-helical forms or spur gears. With the exception of the swivel axes, it is constructionally identical with the Helix 400. The grinding and dressing axes are directly mounted to the theemally stable monolithic mineral cast machine bed. All mechanical and electrical components, as well as the control and operating program, are identical with those of the Helix 400. The Promat 400 offers a very interesting and inexpensive solution to the completely universal gear grinders and a real alternative for companries who grind spur gears or other non-helical forms.
Contact Great Lakes Gear Technologies for more information about the complete product line offered by Höfler GmbH.
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