Girth Gears offered find extensive application in different industry sectors including in sponge iron plants, steel & cement industry, mining industry, wind mills as well as in other industry sectors. These are made available in module range of 10 Module to 70 Module and in minimum diameters of 100 mm to 15000 mm. Further, these comprise maximum weight of 70 MT single pieces. Here the range of hardened & ground gear boxes/gears comprise Worm gear boxes, Helical / Double helical gears/gearboxes, Helical-Bevel gearboxes, Planetary Gearboxes and others.

gear material

42CRMO STEEL DATA

CHEMICAL LIST

C : 0.38-0.45%

Si: 0.17-0.37%

Mn: 0.50-0.80%

S : Allow residual content <0.035%

P : Allow residual content <0.035%

Cr: 0.90-1.20%

Ni: Allow residual content <0.030% Cu: Allow residual content <0.030%

Mo: 0.15-0.25%

MECHANICAL DATA

Tensile Strength σb (MPa): >1080(110)

Yield point σs (MPa): >930(95)

Elongation σ5 (%): >12

Reduction of area ψ (%): >45 Akv (J): Impact absorbing energy Akv(J): >63

Impact toughness value αkv (J/cm2): >78(8)

Hardness: <217HB

Sample size: The blank size of the sample is 25mm

PHYSICAL DATA

Critical point temperature (approximate value): Ac1=730℃, Ac3=800℃, Ms=310℃

Linear expansion coefficient: temperature: 20~100℃/20~200℃/20~300℃ /20 ~400℃/20~500℃ /20~600℃

linear expansivity: 11.1x10K/12.1x10K/12.9x10K/13.5x10K/13.9x10K14.1x10K

ZTIC Gear Cutting Machines include:

• Ø16m CNC Hobbing Machine
• Ø12m Gear Cutting Machine (Switzerland)
• Ø10m Hobbing Machine (Germany)
• Ø4m CNC High Speed Hobbing Machine (Germany)
• Ø1.6m Horizontal CHC Hobbing Machine (Germany)
• Ø5m CNC Profile Gear Grinding Machine (Germany)
• Ø2.8m CNC Profile Gear Grinding Machine (Germany)
• Ø1.25m CNC Profile Gear Grinding Machine (Germany)
• Ø1m CNC Profile Gear Grinding Machine (Germany)
• Ø0.8m CNC Profile Gear Grinding Machine (Germany)
• Automatic positioner

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