Mitsubishi M80 Compact & Lightweight specifications Motor SJ-DJ5.5/100-01

SJ-DJ5.5/100-01 is a Mitsubishi Electric SJ-DJ series compact & lightweight CNC spindle motor used to drive the main spindle (cutting tool rotation) in machining centers and CNC machines.

The SJ-DJ series is a lighter, more compact evolution of the standard SJ-D spindle motor family.

🔧 Key specifications (SJ-DJ5.5/100-01)

These values are listed in Mitsubishi’s official MDS-DJ / MDS-EJ spindle specification manuals.

⚙️ What makes the SJ-DJ series different

Standard SJ-D

• Heavier conventional spindle motor
• Higher structural rigidity
• General machining applications

SJ-DJ

• Compact & lightweight construction
• Lower inertia
• Faster spindle response
• Reduced machine weight
• Better for compact machining centers

Mitsubishi specifically identifies the SJ-DJ family as a “Compact & lightweight” spindle motor series.

🧠 Code breakdown

🏭 Typical applications

Used in:

• compact machining centers
• vertical CNC mills
• drilling/tapping machines
• light-to-medium cutting applications
• high-speed production machining

📐 Mechanical characteristics

• Compact B90 frame
• Precision-balanced rotor
• High-speed bearing system
• Lower inertia than standard SJ-D motors
• Designed for continuous industrial duty

Official Mitsubishi CAD drawings are available for this exact model.

⚠️ Important notes

• Not a servo positioning motor
• Not a linear motor
• Requires Mitsubishi spindle drive electronics
• Cooling and bearing maintenance are important at 10,000 rpm
• Must use approved Mitsubishi motor/drive combinations only

🧠 Simple explanation

SJ-DJ5.5/100-01 is a compact, lightweight 5.5 kW-class CNC spindle motor designed for fast spindle response and high-speed machining up to 10,000 rpm.