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Product Overview
B-204-B-33 is compact inline coaxial precision planetary gear reducer with 33:1 fixed reduction ratio, designed to mount directly onto AKM21 frame micro servo motor output shaft for torque multiplication and rotational speed reduction on low-speed high-load precision positioning axes. Backlash controlled to ultra-low arc-min level for zero-play high-precision mechanical transmission applications, full compatibility with AKM21C series servo motor shaft flange mounting footprint.
Complete Mechanical Technical Specifications
- Core Reduction Performance Data
- Fixed Gear Reduction Ratio: 33:1
- Nominal Continuous Output Torque: 32 N·m
- Peak Intermittent Overload Output Torque: 96 N·m (3× rated torque, maximum 10-second duty cycle)
- Rated Input Rotational Speed: 6000 RPM; Maximum Allowable Input Speed: 8000 RPM
- Maximum Output Rotational Speed: 242 RPM
- Backlash Accuracy Grade: ≤3 arc-min (precision zero-backlash class)
- Mounting & Shaft Specs
- Input Flange Standard: Direct mating AKM21 series 8mm smooth motor shaft interface
- Output Shaft: 16mm diameter keyed solid output shaft with metric standard keyway
- Mounting Form: Inline coaxial flange direct motor mount, no intermediate coupling hardware required
- Service Life Rating
- Rated L10 Service Life: 20,000 hours under nominal continuous torque operating condition
Standard Functional Feature Set
- Ultra-low 3 arc-min backlash precision planetary gear stage eliminates positioning repeatability error for micro-precision automation axes
- Single-stage high-efficiency planetary gear design with 94% full-load mechanical transmission efficiency
- Integrated input shaft clamping hub for direct zero-play mounting onto AKM21 smooth motor shaft without coupling components
- Full sealed IP64 gear housing protection against workshop dust and light coolant mist ingress
- Long-life synthetic high-temperature gear lubricant factory pre-filled; zero intermediate lubricant refill maintenance requirement
- Compact inline coaxial structure minimizes overall mechanical axis length for space-constrained machine design layouts
Material & Structural Composition
- Gear Housing: High-strength die-cast aluminum alloy black matte anti-corrosion coating
- Planetary & Sun Gears: Carburized alloy steel with precision grinding and surface hardening heat treatment
- Planet Carrier: High-tensile aluminum alloy precision CNC machined assembly
- Output Shaft: Heat-treated alloy steel precision ground keyed shaft
- Sealing Components: Fluorosilicone oil-resistant shaft sealing gaskets
- Total Net Weight: 0.92kg
Working Operational Principle
High-speed low-torque rotational output from matched AKM21 servo motor input shaft drives central sun gear inside reducer housing. Three evenly spaced planetary gears mesh with sun gear and internal ring gear, transferring torque to planet carrier assembly at reduced rotational speed and multiplied output torque. Precision ground gear tooth surfaces maintain ultra-low backlash transmission, transmitting smooth high-torque rotary motion to machine load via output keyed shaft. Factory-sealed synthetic lubricant continuously lubricates all meshing gear surfaces during full operating lifespan.
Core Product Advantages
- Direct bolt-on mating interface with AKM21 micro servo motor eliminates separate coupling assembly hardware cost
- ≤3 arc-min precision backlash delivers micron-level repeatable positioning accuracy for inspection and optical equipment
- Single-stage planetary structure achieves 94% mechanical efficiency, reducing motor power loss and heat generation
- Pre-filled lifetime synthetic lubricant removes periodic oil change maintenance procedures
- Compact inline coaxial layout shortens overall mechanical axis length for confined installation spaces
- IP64 full housing sealing prevents dust and light cutting fluid intrusion inside gear meshing chamber
Applicable Industrial Segments
Optical inspection stages, laboratory precision test equipment, micro electronic pick-and-place axes, small desktop CNC engraving machines, miniature packaging screw drive mechanisms, semiconductor micro-transfer modules.
Mandatory Installation Standards
- Motor-reducer mating flange contact surface flatness ≤0.02mm; mounting screws torque tightened evenly to 1.2 N·m
- Strict coaxial alignment guaranteed by integrated clamping hub; radial offset error is mechanically limited to 0mm
- Operating ambient temperature range: -20°C ~ +40°C; storage temperature -30°C ~ +75°C
- Continuous vibration limit ≤0.3g; vibration isolation required if mounted adjacent to stamping equipment
- Output shaft coupling minimum bending radius of connecting flexible elements ≥8 times component outer diameter
- Prohibit applying radial/axial impact force directly to reducer output shaft during mechanical assembly
Operation & Maintenance Mandatory Rules
- L10 service life of 20,000 rated operating hours without lubricant replacement under nominal torque
- Quarterly visual inspection of output shaft oil seal for lubricant leakage; replace fluorosilicone seal once leakage occurs
- Do not operate above maximum input speed of 8000 RPM to avoid premature gear tooth abrasion
- Restrict continuous output torque to nominal 32 N·m; 3× peak overload only allowed within 10s single cycle
- Annual cleaning of outer housing surface to remove accumulated metal dust and coolant residue
- Disconnect servo drive power before disassembling motor-reducer integrated assembly to avoid accidental shaft rotation
