Rotary kiln Girth Gear Professional Customized High Precision Girth Gears
Bull Gears
Bull Gears can be made available by us as per different international standards including ASTM & AISI (USA), BS (British), JIS (Japanese), GS (German) and IS (Indian) standards. These gears comprise toothed driving wheel which is also largest in the mechanism. As a gear/sprocket much larger than others in same power train, these are larger of two spur gears engaged in any machine.
Features : - Making use of latest computer aided designing support using software like AUTOCAD, SOLID WORKS so as to ensure accurate designing of gears
- All software used updated to latest versions
- Gears checked for interference checks as well as dimensional accuracies
- Expertise in offering solutions as per client's designs and drawings
- Expertise in also offering load analysis and stress analysis on gears using finite element analysis for checking appropriate selection of materials & geometrical designs
- Reverse engineering and designing support for generating drawings exactly as per sample as well as obtain accurate geometrical sizing
Applications : - Mining industry
- Steel plants
- Power plants
- Paper plants
- Fertilizer plants
Girth Gears: Rotary kiln Girth Gear,ball mill Girth Gear

Item | Structural features | Processing measure | Test content |
Girth Gear | (1)GS42CrMo4Alloy Steel (corporate proprietary standards) HB 220~240 (2)semi-structured, Y-Spoke (3)Helical (4) reasonable sealing and alignment structure of alloy steel (corporate proprietary standards) | (1) outer steel refining (R-H argon and vacuum treatment) (2) proprietary cold mold hanging sand technology to ensure the casting, the teeth dense (3) normalizing (proprietary technology) to ensure that the tooth surface hardness After (4)rough hobbing, release time, repair the joint surface, then fine roll (5) proprietary homemade hob fine hobbing | (1)castings mechanical properties and chemical composition (internal standard) (2) roughing after sonic testing (3)semi-finishing, finishing after ultrasonic testing and magnetic particle inspection (4) tooth surface magnetic particle inspection, hardness test (5)tooth tolerance check (6) the factory assembly load test to check the accuracy of the size of gear |
42CRMO STEEL DATA
化学成份 CHEMICAL LIST
编辑
碳 C :0.38~0.45%
硅 Si:0.17~0.37%
锰 Mn:0.50~0.80%
硫 S :允许残余含量≤0.035%
磷 P :允许残余含量≤0.035%
铬 Cr:0.90~1.20%
镍 Ni:允许残余含量≤0.030%
铜 Cu:允许残余含量≤0.030%
钼 Mo:0.15~0.25% [1]
力学性能 MECHANICAL DATA
编辑
抗拉强度 σb (MPa):≥1080(110)
屈服强度 σs (MPa):≥930(95)
伸长率 δ5 (%):≥12
断面收缩率 ψ (%):≥45
冲击功 Akv (J):≥63
冲击韧性值 αkv (J/cm2):≥78(8)
硬度 :≤217HB [1]
试样尺寸:试样毛坯尺寸为 25mm
物理性能 PHYSICAL DATA
编辑
1)临界点温度(近似值) Critical point temperature (approximate value)
:Ac1=730°C,Ac3=800°C,Ms=310°C.
2)线胀系数:温度 Linear expansion coefficient: temperature
20~100°C/20~200°C/20~300°C /20 ~400°C/20~500°C /20~600°C,线胀系数
linear expansivity: 11.1×10K/12.1×10K/12.9×10K/13.5×10K/13.9×10K14.1×10K.
3)弹性模量:温度 Modulus of elasticity: temperature 20°C/300°C/400°C/500°C/600°C,
弹性摸 Elastic modulus 210000MPa/185000MPa/ 175000MPa/165000MPa/15500oMPa[2]





