Technical Specifications

1. Fan Electrical Parameters
   • Rated Operating Voltage: 24 VDC
   • Rated Input Current: 0.45 A
   • Rated Input Power: 10.8 W
   • Fan Rotational Speed: 3800 RPM fixed speed
   • Insulation Class: B Class (130°C maximum winding temperature for fan motor)
2. Airflow & Thermal Performance Parameters
   • Maximum Free Airflow Volume: 18.5 CFM
   • Static Pressure at Motor Rear Vent: 0.13 inH₂O
   • Continuous Cooling Capacity: Reduce motor winding temperature by maximum 28°C under full rated torque load
3. Mechanical Dimension Parameters
   • Overall Assembly Outer Diameter: 92 mm
   • Overall Assembly Axial Thickness: 36 mm
   • Mounting Hole Pitch: 76 mm four-point symmetrical mounting
4. Environmental Specs
   • Operating Ambient Temperature: -10°C ~ +55°C
   • Storage Temperature: -40°C ~ +70°C
   • Fan Assembly Protection Rating: IP42
   • Service Life Rating: 40,000 hours MTBF under clean air environment

Functional Features

• Fixed-speed brushless DC fan motor with zero brush wear, eliminating periodic fan brush replacement maintenance
• Integrated metal mesh dust filter screen blocks metal shavings, textile fiber and airborne industrial dust from entering motor internal ventilation channels
• Standard 24VDC operating voltage directly derived from servo amplifier internal auxiliary power supply without independent power adapter
• Four symmetrical through-hole mounting structure perfectly matches rear end cap installation reserved holes of B series servo motors
• Pre-terminated 300mm fixed power lead with stripped wire ends for direct connection to motor internal auxiliary fan terminal block
• Balanced aluminum fan blade assembly eliminates vibration and noise during long-duration continuous operation
• Over-current self-protection circuit embedded inside fan drive PCB to avoid short-circuit damage to servo amplifier auxiliary power supply

Working Principle

Material Composition

• Fan Outer Mount Housing: Cold-rolled steel plate with black epoxy anti-rust powder coating
• Fan Blade: Cast aluminum alloy lightweight balanced blade
• Fan Motor Stator Core: 0.2mm thin silicon steel lamination
• Fan Permanent Magnet Rotor: Hard ferrite magnet
• Dust Filter Screen: 304 stainless steel woven mesh
• Power Lead Cable: UL2464 flame-retardant PVC insulated wire
• Internal Control PCB: FR4 single-layer flame retardant printed circuit board
• Mounting Fasteners: Zinc-plated carbon steel machine screws

Structural Characteristics

• Integrated one-piece housing combining fan motor chamber and filter mounting frame
• Front detachable filter screen structure for tool-free disassembly and regular dust cleaning
• Symmetrical four-corner mounting hole layout consistent with B series servo motor rear end cap standard installation positions
• Axial narrow thickness design without interfering motor brake and brush maintenance access panel
• Fixed length power lead pre-routed through dedicated wire routing notch on housing edge to prevent wire abrasion during assembly vibration
• Sealed internal fan motor compartment to stop cooling air from carrying dust into fan drive electronics

Advantage Highlights

• Direct OEM replacement part, zero modification required for installation on all B404-D model servo motors
• Brushless fan design delivers 40,000 hours maintenance-free operating cycle, far exceeding brushed fan service life
• Built-in stainless steel filter reduces motor internal dust accumulation, lowering commutator and carbon brush wear rate by 40%
• Wide operating temperature range adapts to high-temperature workshop production environments
• Embedded short-circuit protection prevents amplifier auxiliary power circuit burnout caused by fan stall fault
• Low vibration balanced blade avoids additional mechanical resonance noise of servo motor system
• 24VDC unified power interface shares power supply with motor holding brake circuit, simplifying cabinet wiring layout

Applicable Industries

Installation Requirements

1. Align four assembly mounting holes with motor rear end cap reserved holes; fasten four M4 screws with tightening torque of 1.5 N·m
2. Ensure filter screen faces outward toward ambient air intake, blade air outlet side closely attached to motor ventilation grille
3. Route power lead through housing wire notch, fix wire with plastic cable tie to avoid friction contact with rotating fan blade
4. Connect fan positive/negative wire strictly follow terminal marking on motor internal auxiliary terminal block; reverse polarity causes fan stall
5. Maintain minimum 60mm unobstructed open space outside filter screen for smooth air intake without blockage

Operation Precautions

• Clean stainless steel filter screen every 200 operating hours in high-dust workshop environments to avoid airflow reduction and motor overheating
• Immediately cut off 24VDC power supply if abnormal fan noise or stall phenomenon occurs; inspect blade foreign matter blockage first
• Do not apply liquid cleaning agent directly to fan motor compartment during maintenance; only wipe filter screen with dry compressed air
• Fan assembly cannot operate continuously above +55°C ambient; high-temperature environment requires external auxiliary air circulation
• Replace complete fan assembly once MTBF service life of 40,000 hours is reached to prevent sudden fan stall and motor thermal overload fault
• Avoid spraying coolant liquid directly onto fan housing during equipment production operation; liquid ingress leads to internal PCB short circuit