China factory Worm Gear Operator Valve Gearbox supplier

Product Description

JMG series valve worm gearbox from ZHangZhoug CHINAMFG Auto-tech Co.,Ltd has the advantage of high transmission efficiency and it has the stable self-locking design. Users can adjust the speed ratio based on their real using condition. Also, JMG valve worm gearbox can achieve 90 degree rotation, which can be widely used in ball valve, butterfly valve and other quarter turn valves. JMG series adopts 45cr material shaft, which has the higher level strength. Also, the surface has undergone carbonization treatment, greatly improve the whole strength, and guarantee its ability to work in the hard using condition. CHINAMFG provides wider range of using temprature from -45°C until 180°C. JMG worm gearbox has the superior gear contact ratio, CHINAMFG can guarantee only have 0.1mm process difference.By using our gearbox, it can help to achieve more precise, more confortable valve control.


Model JMG series worm gearbox
Action Smooth and reliable
Weather proof IP67, option IP68
Temperature -45°C~180°C
Rotation range ±5°for the rotation at 0°and 90°
Output torque 260NM~58000NM
Speed ratio Adjustable


Model Speed ratio Input torque
Output torque
Flange Size Maximum stem diameter Maximum install height Handwheel diameter
JMG15 27 32 260 (F05)F07 20 55 200
JMG20 37 47 520 F07/F10 28 58 200
JMG21 38 75 850 F10/F12/F14 36 63 300
JMG30 40 113 1350 F12/F14/F16 48 85 350
JMG55 47 142 2000 (F12)/F14/F16 53 90 350
JMG58 55 152 2500 F16/F20 62 95 400
JMG88 61 164 3000 (F14)/F16/F20/F25 65 105 500

Shipping Cost:

Estimated freight per unit.

To be negotiated
Function: Manual Operate
Layout: Three-Ring
Hardness: Soft Tooth Surface
US$ 16.6/Piece
1 Piece(Min.Order)


Order Sample



Customized Request


Is it Better to Repair or Replace a Damaged Gearbox?

Deciding whether to repair or replace a damaged gearbox depends on several factors and considerations:

  • Extent of Damage: Assess the severity of the gearbox damage. Minor issues like worn bearings or seals may be repairable, while extensive damage may necessitate a replacement.
  • Cost of Repair: Compare the cost of repairing the gearbox to the cost of replacing it with a new or remanufactured unit. In some cases, repairs might be more cost-effective.
  • Availability of Parts: Availability of replacement parts for the gearbox can influence the repair option. If parts are hard to find, replacement might be a more viable choice.
  • Age and Condition: Consider the age and overall condition of the vehicle. If the vehicle is older and nearing the end of its lifespan, a replacement gearbox might offer better long-term reliability.
  • Performance and Efficiency: A new or remanufactured gearbox might offer improved performance and efficiency compared to a repaired one.
  • Future Maintenance: Evaluate potential future maintenance needs of both repair and replacement options. A replacement gearbox might come with a warranty and require less frequent maintenance.
  • Professional Assessment: Seek advice from a qualified mechanic or technician who can thoroughly assess the gearbox and provide recommendations based on expertise.

Ultimately, the decision to repair or replace a damaged gearbox should be based on a careful evaluation of these factors. It’s recommended to consult with professionals to make an informed choice that best suits your specific situation and budget.

China factory Worm Gear Operator Valve Gearbox   supplier China factory Worm Gear Operator Valve Gearbox   supplier
editor by CX 2023-09-23