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GEARBOXES

Hofmann Engineering specialises in the design and manufacture of all styles of industrial gearboxes, including helical, bevel-helical, double-helical, planetary, self-aligning and custom gearboxes to suit your requirements. We offer a range of in-house heat treatment options including case carburising, quench & tempering and induction hardening. Hofmann Engineering has a range of finish machining options including finish grinding and hard-cutting, to achieve excellent quality levels required.

GEARBOX REBUILD DIVISION

Hofmann Engineering will tackle any repair presented from reclaimers to positioner drives, agitator’s to exciters, mill drives to conveyors to mention only a few, not only do we overhaul to the manufactures specification we have improved the original design on many occasions thus increasing the life and reliability.

UPGRADE YOUR EXISTING GEAR DRIVES
More power and longer life, quieter operation, leak proof sealing and re-ratio.

ADVANCEMENT THROUGH TECHNOLOGY
Improved case hardened and ground gearing, computerised gear geometry and profile optimisation, high capacity bearings and improved sealing.

SELF ALIGNING GEARBOX

Hofmann Engineering's Self Aligning Drives always maintain 100% contact automatically through all loading stages regardless of:
• Mating gear axial run out.
• Foundation movement and temperature expansion changes.
• Deflections and load variations.

APPLICATIONS
• Mills, Kilns, Dryers and Car Dumpers.
• Dragline, Shovels, Winders and Slewing Drives.
• Any gear drive where self aligning is required to reduce maintenance.

BEVEL GEARS

DESIGNED OR REVERSE ENGINEERING AND MANUFACTURED UNDER ONE ROOF

DESIGN
Using state-of-the-art engineering calculation programs in the hands of talented engineers, a 3D model of your bevel gear can be produced to DIN, AGMA or Gleason standards from the outputs. For replacement gears, the model of the existing design can be acquired from a CMM and modified to solve the problem which caused it to fail. Tooth modification can also be optimised to give quiet running gears.

INSPECTION
Hofmann Engineering prides itself on producing superior quality products. The only way to ensure that this is achieved is by imposing a highly accurate inspection process which the Spiral, Helical or Straight Bevel Gearing along with the Worm Gearing must pass before they can be released from the factory. All these types of Gearing are inspected on our two large CMM’s or the portable CMM arm.

CUTTING
Hofmann Engineering currently has 8 new 5-axis machines for cutting spiral, helical and straight bevel gears along with worm wheels. It also has a unique software, crafted exclusively to obtain the optimised CAM program to machine the profile of spiral, helical and straight bevel gears plus worm wheels.

WORM GRINDING
Wormshafts being ground on one of our Hofler form grinders. After grinding the accuracy is preliminary checked prior to final inspection on the CMM

HEAT TREATMENT
Over the years, Hofmann Engineering has developed the technology to heat treat many different types of gears. This technology can also be applied to spiral, helical, straight bevel gears and wormshafts to improve their performance and life. Hofmann Engineering is capable of case carburising to a diameter of 1.87m, and full contour, tooth-by-tooth induction hardening to a diameter of 4m. Once the gears have been heat-treated, they can be hard cut to DIN 3.

WORM MESH CONTACT INSPECTION
Worm wheel and wormshaft being inspected to confirm contact accuracy.

TESTING
Hofmann Engineering can test their spiral bevel gears in the gearbox on their load test cell to ensure that the gearbox will be within the noise specifications required by the customer.