Ball Cage Constant Velocity Joint BJ125 for Metallurgical Machinery
The BJ125 is a fixed type ball cage constant velocity joint used in steel making, continuous casting, hot rolling and cold rolling. It is also applied to leveler and mill drive systems in non ferrous plants and across engineering, mining, chemical and petroleum machinery.
- Fixed type ball cage CV joint, size 125
- High accuracy with constant speed transmission
- Stable movement and long working life
- Direct substitute for cross joints
Key Benefits
Five features that define the joint.
Constant Speed Output
Constant velocity transmission means the driven shaft turns at the same speed as the driver regardless of working angle.
Stable Movement
High accuracy manufacturing gives stable movement, which protects the connected equipment from vibration.
Long Working Life
The joint is built for the continuous duty of metallurgical drives rather than intermittent service.
Where It Is Used
Where it is used.
- Steel making, continuous casting, hot and cold rolling
- Leveler and mill drive systems in non ferrous plants
- Metalworking and engineering machinery
- Mining, chemical and petroleum machinery
Who It Is For
- Steel plants replacing cross joints
- Non ferrous processors driving levelers and mills
- Engineering machinery builders
- Buyers sourcing a BJ125 equivalent
Problems It Solves
- Speed fluctuation from cross joints
- Vibration reaching the gearbox
- Short joint life in heavy duty drives
- Sourcing a specific BJ size quickly
Technical Features
Selection notes.
Fixed Type Construction
BJ125 is a fixed type joint, suited to drives where the shaft distance does not change during operation.
High Accuracy Manufacturing
Accuracy in the ball tracks is what delivers constant speed and stable movement.
Cross Joint Replacement
The joint is dimensioned to substitute cross joints in existing drive layouts.
Specifications
BJ125 is one size within the fixed type BJ series. Interfaces are made to your shaft data.
| Model | BJ125 fixed type ball cage CV joint |
|---|---|
| Transmission | Constant speed |
| Key Features | High accuracy, stable movement, long working life |
| Substitute For | Cross joints |
| Primary Industries | Steel making, continuous casting, hot and cold rolling |
| Additional Industries | Metallurgical, metalworking, engineering, mining, chemical and petroleum machinery |
Materials
- Forged alloy steel body
- Hardened ball tracks
- Sealed and greased assembly
Manufacturing Process
Model Confirmation
Torque, speed, angle and installed length confirm BJ125 or an adjacent size.
Forging And Machining
The body is forged and machined so ball tracks stay concentric.
Heat Treatment And Grinding
Tracks are hardened and ground for contact fatigue life.
Assembly And Sealing
The joint is greased, sealed and checked before packing.
Quality Control
- Track hardness and geometry inspection
- Angular movement verification
- Dimensional check of shaft interfaces
- Seal and grease fill confirmation
Customization Options
- Flange and spline to your shaft drawing
- Adjacent BJ sizes where torque requires
- Sealing for hot or dusty positions
- Spare seal kits
Use Guide
- Confirm the installed length before ordering
- Keep running angle modest for longest life
- Re grease at the interval set for the drive
- Check for play during planned inspections
How It Compares
BJ125 in context.
| Cross joints | Constant speed transmission with stable movement and longer working life in the same drive position. |
|---|---|
| Plunging type joints | BJ125 is fixed type, so it suits drives where shaft distance stays constant. |
| Larger BJ sizes | BJ125 covers its torque band without oversizing the drive envelope. |
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View DetailsBall Cage CV Joint BJ125 FAQ
Where is the BJ125 used?
Steel making, continuous casting, hot rolling and cold rolling, plus leveler and mill drives in non ferrous plants and general engineering, mining, chemical and petroleum machinery.
Can it replace a cross joint?
Yes, the joint is designed as a substitute for cross joints, with high accuracy and constant speed transmission.
Is it fixed or plunging type?
BJ125 is a fixed type joint. Where axial movement has to be absorbed we supply a plunging type from the sliding series.
Can you machine the interfaces to our shaft?
Yes. Send the flange and spline dimensions with the installed length.
Do you supply other sizes?
Yes, the fixed type BJ series covers a range of sizes. Send your torque and angle data and we select.
What do you need to quote?
Torque and speed, working angle, installed length, interface dimensions and quantity.
Order A BJ125 Joint
Send your drive data and interface dimensions and we confirm the model and lead time.