40:1 planetary reduction — torque and stiffness numbers that matter
The GBX0600400582D is a straight-tooth planetary gearbox in the GBX series, 60 mm diameter, delivering a 40:1 reduction ratio. Continuous output torque is 40 N.m, with a maximum intermittent rating of 70 N.m — the margin covers acceleration peaks and occasional overloads without exceeding the 30000-hour service life at 100 rpm and 30 °C. Torsional rigidity is 2.5 N.m/arcmin, and maximum backlash is 25 arcmin — the stiffness-to-backlash ratio suits positioning axes where repeatability matters more than absolute accuracy. The 0.064 g.cm² moment of inertia keeps the reflected inertia low on small servo or stepper systems.
Load ratings and thermal limits for the application engineer
Maximum axial force on the output shaft is 450 N at 100 rpm for the full 30000-hour life, or 600 N if the duty cycle drops to 10000 hours. Radial force at mid-shaft is 340 N for 30000 hours, 500 N for 10000 hours — these are the numbers that govern bearing life, not the torque rating alone. Efficiency is 94 % at rated load, which means about 6 % of input power dissipates as heat through the black anodised aluminium housing. Noise level is 58 dB at 1 m under no-load conditions — straight-tooth planetary gears are inherently noisier than helical, so this figure is a baseline; expect a few dB higher under load depending on the motor coupling and mounting resonance.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX0600400582D as obsolete. Available through independent surplus and broker channels. Quantities are lot-specific — confirmed at RFQ against your BOM line. No pin-compatible drop-in replacement exists from Schneider; a functional replacement requires checking the mounting flange, shaft diameter, and overall length against the current BCH or Lexium gearbox ranges.
Shaft output sealing and environmental fit
Shaft output protection is IP54 — the seal keeps out dust and splashing water but is not rated for washdown or submersion. The C 45 steel shaft is standard for this class; in corrosive environments the shaft seal lip is the wear item, not the shaft material.