What the 40 N.m continuous rating means for your load
The GBX0600051003F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized for servo-motor output stages where compactness and efficiency matter more than ultra-low backlash. Continuous output torque is 40 N.m at 100 rpm and 30 °C — this is the figure to size against your duty cycle, not the 64 N.m peak maximum. At 94% efficiency, thermal losses stay low enough that the 30,000-hour service life is achievable in continuous-run applications. The 5:1 reduction means a 3000 rpm input motor delivers 600 rpm at the output. Backlash is 16 arcmin — typical for a straight-tooth planetary, adequate for conveyor indexing or rotary tables but not for precision positioning stages.
Sourcing reality — obsolete, quoted to order
Schneider Electric lists this gearbox as Obsolete. The part is available through independent surplus and broker channels — quantities are lot-specific and confirmed at RFQ. For a BOM freeze or a replacement on an existing machine, the 60 mm frame size, 5:1 ratio, and 40 N.m continuous torque are the parameters to match against a current-production planetary gearbox from any supplier. The straight-tooth design and 16 arcmin backlash are the tolerance envelope the replacement must meet.
Mounting and environmental fit
The 60 mm diameter housing is black anodized aluminium — lightweight and corrosion-resistant for indoor use. Shaft material is C45 steel, and the output seal is rated IP54, meaning it keeps out dust and splashing water but is not washdown-rated. The gearbox is lubricated for life — no scheduled grease changes. Maximum axial force on the output shaft is 450 N at 100 rpm for the full 30,000-hour life, and maximum radial force is 340 N when applied at mid-shaft. Noise output is 58 dB at 1 m under no-load — quiet enough for operator-adjacent conveyor or packaging lines without acoustic enclosures.