Gearbox for Steel Wire Rod Rolling Mill

• Customization: Available
• Application: Machinery
• Function: Speed Increase
• Model NO.: HJ-A1201204
• Layout: Finishing Rolling Mill Group
• Hardness: Hardened Tooth Surface
• Installation: Vertical Type
• Step: G2.5
• Type: Speed Increasing Gearbox
• Item: Speed Increasing Gear Box-90m
• Highest Speed Output Ratio: 45/157=0.2866
• Lowest Speed Output Ratio: (60/157)X(55/60)=0.3503
• Motor Power: 4500kw
• Motor Speed: 1000/1300 R/Min
• High-Speed Output Shaft Speed: 4019 R/Min
• Low-Speed Output Shaft Speed: 3288 R/Min
• Gear Meshed Speed: 77.2 M/S
• The Backlash Is Less Than: 0.36 mm
• Gear Balancing Precision Grade: G2.5
• Transport Package: Seaworthy Packing or as Customer′s Request
• Specification: ISO, SGS, BV
• Trademark: Hangji
• Origin: Shaanxi, China
• HS Code: 8455219000
• Production Capacity: 25 Sets/Year

Product Description

 
  

Speed increasing gear box of 90m finishing mill
Composition of speed increasing gearbox
Spare parts of speed increasing gearbox case, support base, big gear, transmission axis, bevel wheel and lubrication system.
Technical characteristics
1, technical parameter

Highest speed output ratio	45/157=0.2866
Lowest speed output ratio	60/157)x(55/60)=0.3503
Motor power	4500kW
Motor speed	1000/1300r/min
High-speed output shaft speed	4019r/min
Low-speed output ratio	3288r/min
Gear meshed speed	77.2m/s
The backlash is less than	0.36mm

2,Technical characteristics
Box is melt with thick steel with great quality to reach the intensity that the case required. Case should take stress aging treatment before the produce to reach the stability that required.
Big gears and gear shaft used carbon alloy steel forging blank, after roughing, workpiece need to take ultrasonic flaw detection process to quench. In order to ensure the tooth surface with high hardness, tooth surface need to take carburizing and quenching treatment after semi-finishing .Fine grind of tooth surface to insure the high accuracy, after finishing the production of gear, the balance test is needed, the experience speed is 1500r/min and the balance level is G2.5.
Transmission shaft use the alloy steel forging blank, transmission shaft takes quenched to make sure the intensity and durableness. After the semi- finishing, transmission need to grind to guarantee the accuracy of every workpiece.
When the assemble finished, the no-loading test should be keep 2-4hours, the speed is 1200r/min, the temperature of shaft should not exceed 60ºC,the work of gear should be smooth, no hitting noise and concussion, every joint surface should not have oil spill phenomenon.