25:1 planetary, 40 N.m continuous — the torque and backlash that matter
The GBX0600251403F is a 60 mm planetary gearbox with a 25:1 reduction ratio, delivering 40 N.m continuous output torque at 100 rpm and 30 °C ambient. Maximum intermittent torque hits 64 N.m — the figure to size against for acceleration peaks, not steady-state load. Torsional backlash is rated at 20 arcmin maximum — that is the total lost motion across the gear train under load reversal. For positioning applications where cumulative error stacks across multiple axes, this number sets the repeatability floor. Efficiency sits at 94 %, which means about 6 % of input power is lost as heat in the gear mesh. In a closed-loop servo system this affects the motor sizing — the motor must deliver the reflected load plus the gearbox loss.
Obsolete — sourcing through independent distribution
Available through independent surplus and broker channels. No stock-holding claim — sourced per inquiry.
Construction and environmental limits
Housing is black anodised aluminium, shaft material is C45 steel. The gearbox uses straight-cut teeth — no helical angle, so axial thrust loads are minimal, but the mesh is noisier than a helical equivalent at the same ratio. Shaft output seal is rated IP54 — protected against dust ingress and splashing water, but not immersion. Maximum axial force on the output shaft is 450 N for the 30,000-hour life target, stepping to 600 N if you accept a 10,000-hour service life. Radial force limit is 340 N at mid-shaft for the longer life target, 500 N for the shorter.