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TJ-BKV worm gear box

    Name:TJ-BKV worm gear box

cast iron worm gear box


Workign principle of Tianji brand gear box:

Gear box are used to transfer rotation and torque from motor to working machine.Most gear boxes are used to decrease speed by gears in the gear box .

 Worm gear box is much widely used in mordern machinery systems,since it’s ratio can be up to 1:100 easily ,which is much bigger than all gears box , and it’s demision is much smaller than all gears when ratio is same.


Design characteristics:

1:Use low-carbon cast iron cementation processing completely.

2:The gear and the gear shft precision is high.

3:The volume small,but the torque is big.




After 300-hour operation, please change the oil, and flush the gear uint with suitable detergents.


Pls do not mix the mineral oil and synthetic oil.


pls check the oil level in regular time.




1:Pls do not store in outdoor.


2:pls put cardboard, wood or other material between the products and floor. the gear box cannot directly touch the floor.


General Technical data



Housing material high-strength cast iron
Housing hardness HBS190-240
Gear material cast iron
Surface hardness of gears HRC58°~62 °
Gear core hardness HRC33~40
Input / Output shaft material 42CrMo alloy steel
Input / Output shaft hardness HRC25~30
Machining precision of gears accurate grinding, 6~5 Grade
Lubricating oil Size 37 up to 87 with oil, size 97 up to 187 without oil.
Heat treatment tempering, cementiting, quenching, etc.
Efficiency 94%~96% (depends on the transmission stage) 
Noise (MAX) 60~68dB
Temp. rise  (MAX) 40°C 
Temp. rise (Oil)(MAX) 50°C
Vibration ≤20μm
Backlash ≤20Arcmin
Brand of bearings HRB,LYC,ZWZ,NSK or other brand
Brand of oil seal NAK--- Taiwan or other brand

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