Mitsubishi M80 Built-IN Spindle Motor SJ-2B4003Т
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Mitsubishi M80 Built-IN Spindle Motor SJ-2B4003Т

Mitsubishi M80 Built-IN Spindle Motor SJ-2B4003Т

JJAutomationSKU: SJ-2B4003Т
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Description

SJ-2B4004T (Mitsubishi Electric)

SJ-2B4004T is a Mitsubishi Electric SJ-B series built-in AC spindle motor, used in light-duty CNC machine tools and small spindle applications. It is part of the SJ-2B compact built-in spindle family, designed for simple machining tasks, auxiliary spindles, and small machining centers.

🔧 Verified specifications (official Mitsubishi data)

From Mitsubishi SJ-B series documentation:

Parameter Value
Series SJ-B
Model SJ-2B4004T
Continuous rated output 0.75 kW
Short-time rated output 1.5 kW (15 min rating)
Acceleration/deceleration output 1.5 kW
Actual accel/decel output 1.8 kW
Base rotation speed 3000 rpm
Maximum speed 15,000 rpm
Rated torque (continuous) ~2.39 N·m
Short-time torque ~4.77 N·m
Rotor inertia 0.00078 kg·m²
Frame class small built-in spindle (SJ-B compact series)

🔧 Model code breakdown

Code part Meaning
SJ Mitsubishi spindle motor family
2B SJ-B compact built-in spindle series
4004 0.75 kW class motor variant
T terminal / connector configuration type

So:

SJ-2B4004T = 0.75 kW compact built-in spindle motor for light CNC machining

⚙️ What this motor is used for

SJ-2B4004T is typically used in:

  • small CNC machining centers
  • light milling and drilling spindles
  • auxiliary spindle units
  • precision low-load machining
  • compact high-speed tooling applications

⚖️ Position in Mitsubishi spindle lineup

Series Role
SJ-2B compact low-power built-in spindles
SJ-BG modern high-speed integrated spindles
SJ-DG high-torque cutting spindles
SJ-DL high-speed external spindle motors

🧠 Simple explanation

SJ-2B4004T is a small 0.75 kW built-in spindle motor designed for light CNC machining, offering moderate speed and low cutting power for compact machine tool applications.


SJ-2B4003Т

SJ-2B4003T (Mitsubishi Electric)

SJ-2B4003T is a Mitsubishi Electric SJ-B series built-in AC spindle motor, used in light CNC machining centers and small integrated spindle applications. It belongs to the compact SJ-2B spindle motor family, designed for low-to-medium power machining with built-in spindle construction.

🔧 Verified specifications (official Mitsubishi data)

From Mitsubishi SJ-B series documentation:

Parameter Value
Series SJ-B
Model SJ-2B4003T
Continuous rated output 1.5 kW
Short-time rated output 2.2 kW (15 min rating)
Standard accel/decel output 2.2 kW
Actual accel/decel output 2.64 kW
Base speed 3000 rpm
Maximum speed 12,000 rpm
Continuous torque 4.77 N·m
Short-time torque 7.0 N·m
Rotor inertia 0.00138 kg·m²
Compatible drive unit MDS-D2-SP-40

🔧 Model code breakdown

Code part Meaning
SJ Mitsubishi spindle motor family
2B SJ-B compact built-in spindle series
4003 1.5 kW class motor variant
T terminal / connector configuration type

So:

SJ-2B4003T = 1.5 kW compact built-in spindle motor for light CNC machining

⚙️ Where it sits in the SJ-2B family

Compared with nearby models:

  • SJ-2B4002T → 0.4 kW (very light duty)
  • SJ-2B4003T → 1.5 kW (balanced light machining)
  • SJ-2B4004T → 0.75 kW (variant optimized differently in output structure)
  • SJ-2B4B01T → higher power class (~2.2 kW)

So SJ-2B4003T is one of the stronger compact SJ-2B spindles.

🏭 Typical applications

This motor is used in:

  • small CNC machining centers
  • light milling and drilling operations
  • compact high-speed spindle units
  • auxiliary spindles
  • precision low-load machining

It is selected when machines need:

  • ⚡ moderate power with compact size
  • 🎯 stable precision at mid RPM range
  • 🧩 built-in spindle integration
  • 📉 low inertia for fast response

⚖️ Position in Mitsubishi spindle lineup

Series Role
SJ-2B compact built-in spindle motors
SJ-BG modern high-speed integrated spindles
SJ-DG high-torque cutting spindles
SJ-DL external high-speed spindle motors

🧠 Simple explanation

SJ-2B4003T is a 1.5 kW built-in spindle motor designed for compact CNC machines, offering balanced light-duty cutting, fast response, and up to ~12,000 rpm operation.

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