The GBX1201000552F is a Schneider Electric planetary gearbox with a 100:1 reduction ratio, straight teeth, and a 120 mm housing diameter. Efficiency is 94 %, so about 6 % of the input power is lost as heat in the gear train — typical for a single-stage planetary at this ratio. Noise level is 65 dB at 1 m, no-load, which is quiet enough for most production-floor environments without an acoustic enclosure.
Sourcing reality — obsolete, sourced through independent channels
Schneider Electric lists this gearbox as obsolete. Stock is 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 the original maker; a functional replacement would require a different frame size or ratio and a mechanical re-fit.
Load limits and service life — the numbers that decide the fit
Rated service life is 30000 hours at 100 rpm and 30 °C ambient. The maximum axial force on the output shaft is 2100 N for the full 30000-hour life, or 2800 N if you accept a shorter 10000-hour life. Maximum radial force (applied at mid-distance on the output shaft) is 1500 N for 30000 hours, 2000 N for 10000 hours. Torsional backlash is 14 arc.min maximum — this is the lost motion in the gear train under reversing loads. For applications requiring tighter positioning repeatability, a lower-backlash gearbox (e.g. 3-5 arc.min) would be needed. The housing is black anodized aluminium; the shaft is C45 steel. Shaft output seal is rated IP54. The gearbox is lubricated for life — no scheduled oil changes. Torsional rigidity is 12 N.m/arcmin, which defines the stiffness of the output under load.