Product image · configuration may vary
XT45-1 Rear-Mounted Motor Spindle Unit
XT45-1-MB is a rear-mounted motor spindle unit for layouts that provide rear-side motor, belt path, guarding and service clearance. Final selection follows the workpiece, tooling, cutting load, duty cycle and machine interface.
- Spindle interfaceNT40
- Published speed4,000 rpm; 6,000 rpm NSK option
- Published roundness≤ 0.004 mm
- Assembly reference125 kg
Send the operation, workpiece, tooling, target speed, load, duty cycle and machine interface drawing for configuration review.
Final specifications depend on the workpiece, tooling, cutting load, duty cycle, motor and machine interface.
XT45-1-MB selection guide
XT45-1 Rear-Mounted Motor Spindle Unit for machine builders and production-equipment integrators.
XT45-1-MB is a rear-mounted motor spindle unit for layouts that provide rear-side motor, belt path, guarding and service clearance. Final selection follows the workpiece, tooling, cutting load, duty cycle and machine interface.
Application fit
Start with the workpiece and process. The model name is only a starting point.
Special-purpose machines
Dedicated boring, milling or combined stations designed around a defined part and cycle time.
Modular machining units
Integrate the spindle with a slide, column, fixture and CNC or special-purpose control.
Production cells
Concentrate compatible operations after tooling, load, guarding and service access are reviewed.
Retrofit projects
Compare center height, mounting, rear-side envelope and maintenance access with the existing machine.
Published selection data
| Model platform | XT45-1-MB |
|---|---|
| Spindle interface | NT40 |
| Published speed | 4,000 rpm; 6,000 rpm NSK option |
| Bearing arrangement | 7213AC × 3 (TBT) and 7212C × 2 (DB) |
| Lubrication | High-speed bearing grease |
| Published temperature rise | ≤ 20°C |
| Published roundness | ≤ 0.004 mm; confirm measurement and acceptance conditions |
| Published maximum power | ≤ 10 HP |
| Motor reference | Three-phase and servo spindle motor range: 2.2–7.5 kW. Servo motor rated speed 2,000 rpm; maximum 7,000 rpm. These are motor speeds, not spindle output speeds |
| Motor arrangement | Rear-mounted |
| Published assembly weight | 125 kg |
| Engineering file | Request the matching dimensional drawing and compatible 3D file before integration |
Published values are selection references taken from the existing JNYO product sheets. Confirm the exact build, dimensions, motor, speed, load, acceptance method and supply scope in the approved drawing and quotation.
Compare configurations
Choose the physical layout, tool interface, ATC and coolant requirements before fixing motor and control specifications.
Five inputs for a useful recommendation
Boring, milling, drilling, facing or a combined process.
Material, feature dimensions and required cycle time.
Holder, tool diameter, interface and target speed.
Cutting load, finish, accuracy and duty cycle.
Mounting drawing, center height, envelope, orientation and control.
XT45-1-MB selection questions
Confirm these items before the drawing and quotation are approved.
How should I choose the spindle interface?
Start from the holder, tool-change method, cutting load and required accuracy. Send the tool specification and operation for review.
Are all published speed values available on every build?
No. The approved limit depends on bearings, motor, drive ratio, tooling, cutting load and duty cycle.
What changes with the motor arrangement?
MF and MB layouts change the motor envelope, belt path, guarding and maintenance access. Compare the matching drawing with the real machine.
Can JNYO provide a dimensional drawing or 3D model?
Yes, compatible files can be requested after the exact spindle interface, motor layout, ATC and coolant requirements are identified.
What information is needed for a quotation?
Send the workpiece material, operation, tool details, target speed, cutting load, accuracy requirement, machine drawing, quantity and destination country.
Catalog source and configuration limits
JNYO product catalog, PDF page 15; Chinese edition, approximately 74 MB.
The ordinary NT40 rear-drawbar arrangement and the BT40 automatic tool-change configuration have separate drawings. The 6,000 rpm spindle option carries the catalog NSK-bearing condition. Motor speed and spindle output speed are different quantities; verify the transmission ratio and complete configuration.
Reference weights describe pictured configurations. Catalog roundness is not a workpiece-accuracy guarantee. Confirm measurement conditions, complete dimensional drawings, actual assembly weight and supply scope before integration.
Move from product review to machine integration.
Use the model as a starting point. The approved dimensional drawing and configuration record remain the final integration reference.
Confirm mounting faces, center height, spindle interface and machine envelope.
Send application brief → 023D libraryFind 3D model & CAD filesSearch the engineering-file library or request the model for the selected configuration.
Search files → 03Selection reviewCheck the application with JNYOShare the workpiece, tooling, speed, load, accuracy and motor preferences.
Request engineering review ↗
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- Spindle Interface
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Send the process and machine interface before ordering XT45-1-MB.
JNYO will compare the application, spindle interface, motor, tooling and mounting requirements before confirming a drawing and quotation.