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Mills & Kilns > Mills & Kilns

Mills & Kilns

Pinions

PINIONS

  1. Through-hardened.
  2. Induction-hardened.
  3. Case-carburised.
  4. HofCarb carburised.
  5. Self-aligning.

CAPACITY

  • Size - 1.6m face x 6m lg.
  • Hardness - to 62 HRC
  • Quality - AGMA13 (DIN 5)

Girth Gears

GIRTH GEARS

  1. SG iron.
  2. Cast steel.
  3. Austempered SG iron.
  4. Forged fabricated.
  5. Forged fabricated induction hardened.

CAPACITY 15m ( 50ft)

  • Size - 2.5m face x 15m dia.
  • Hardness - to 52HRC (500BHN).
  • Quality - AGMA 10 (DIN 5)

SELF-ALIGNING DRIVES
  • Automatically maintains 100% gear contact regardless of movement in foundations and/or driven component.
  • Can use recirculating filtered oil.
  • Reduced maintenance as alignment checks and adjustments are eliminated.
  • Power to 10 000kW per gearbox.
GEARBOXES STANDARD
Completely designed and manufactured in house using AGMA and DIN standards.
  • Standard range of multi-stage drives.
  • Precision Case-carburised and ground gearing to AGMA 14 for quiet reliable operation.
GEARBOXES SPECIALS
Special Gearboxes can be designed to fit existing foundation as a direct replacement of your old drive. (Flender, Falk, Valmet etc.).
  • Power upgrades, ratio changes and replacement parts available.
  • Torque-splitting gear drives.
INCHING DRIVES
Hofmann Engineering makes a range of inching drives to fit to new and existing mill and kiln drives. Features include:
  • Planetary main reduction.
  • Hydraulic or electric.
  • Integral or separate brakes.
  • Disengaging couplings.
GEAR PROTECTION SYSTEMS
  • Continuous & intermittent grease spray systems.
  • Re-circulating filtered oil systems.
  • Infrared temperature monitoring systems.
  • Measures gear mesh temperature.
  • Sealing systems for girth gears and trunnion bearings.
LUBRICANT SUPPLY
Hofmann Lubrication division have an agreement with Kluber Lubrication Germany AG to supply a range of products, directly formulated to Protect the Gearing that we design and manufacture. This forms an integral part of our Gear Protection Package used to improve the life of high performance gearing.
ONSITE MACHINING
  • Flange and Journal machining to 14m dia.
  • Line boring and drilling to 3m dia x 6m L.
  • Grinding and linishing of kiln tyres.
  • Milling of keyways and surfaces.
  • Welding and heat-treatment.
  • Bolt tensioning.
  • Special purpose machinery design and manufacture to suit your application.
ONSITE INSPECTION & CONSULTING SERVICE
  • Inspection and assessment of your mill and drive train.
  • Failure analysis including Engineering and Gearing design review. Finite Element Analysis and MetallurgicalAnalysis.
ONSITE SERVICE
  • Laser alignments of drive trains.
  • Girth gear/pinion installation.
  • Reconditioning of worn gearing using case hardened pinions and chemical etchant.
  • Trunnion bearing installation including scraping in of white metal bearings.

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