Planetary gearbox, 60 mm frame, 8:1 reduction
The GBX0600080583D is a straight-tooth planetary gearbox in the 60 mm diameter GBX frame from Schneider Electric. It delivers an 8:1 reduction ratio with 96 % efficiency — meaning 96 % of the input power reaches the output shaft, a strong figure for a single-stage planetary. Continuous output torque is 18 N.m, with a maximum intermittent torque of 29 N.m. The 8:1 ratio multiplies motor torque by roughly eight, minus the 4 % efficiency loss — so a 2 N.m servo input yields about 15.4 N.m at the output shaft under continuous duty.
Torque, life, and positioning stiffness
Rated service life is 30,000 hours at 100 rpm output speed and 30 °C ambient — a solid 3.4 years of continuous 24/7 operation at that speed. The gearbox is lubricated for life, so no maintenance interval for oil changes. Torsional rigidity is 2.3 N.m/arcmin, and maximum torsional backlash is 20 arcmin. That backlash figure is typical for a standard-precision planetary — adequate for indexing and conveyor positioning, but not for high-accuracy rotary table or laser-cutting axes where sub-arcmin backlash is needed. Maximum axial force on the output shaft is 450 N at 100 rpm for the full 30,000-hour life, or 600 N if you accept a shorter 10,000-hour service window. Radial force limits are 340 N and 500 N respectively, both measured at mid-span on the output shaft.
Mounting, sealing, and noise
Mounting position is any orientation — the lifetime lubrication works in vertical, horizontal, or inverted setups. The housing is black anodised aluminium, shaft material is C45 carbon steel. Shaft output seal is rated IP54 — splash-proof, not jet-proof. Fine for dry indoor environments or occasional washdown mist, but not for direct hose-down in food processing. Noise level is 58 dB at 1 m, no-load — quiet enough for a machine-tool enclosure without additional acoustic cladding. Moment of inertia reflected to the input is 0.065 g.cm² — low enough that a small servo can accelerate the gearbox without significant torque penalty.
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