Planetary gearbox, 40 mm, 9:1 — what the ratings mean
The GBX0400090702F is a 40 mm-diameter planetary gearbox with straight-cut teeth, delivering a 9:1 reduction ratio. Continuous output torque is 16.5 N.m at 100 rpm and 30 °C; the maximum intermittent torque reaches 26 N.m under the same conditions. Efficiency is listed at 94 % — that's the power transfer through the gear train at rated load, so about 6 % of input power is lost as heat. The noise level at 55 dB (1 m, no-load) is low enough for a quiet production area; the straight-tooth profile is inherently noisier than helical, but this stays inside a typical enclosure.
Rated life and load limits — the real duty envelope
Service life is 30,000 hours at 100 rpm and 30 °C — that's about 3.4 years of continuous running. The gearbox is lubricated for life, so no oil-change interval to schedule. Maximum radial force (Fr) is 200 N at 100 rpm for 10,000-hour life, dropping to 160 N for the full 30,000-hour target. Axial force (Fa) follows the same derating curve. The shaft output seal is rated IP54 — splash-resistant but not washdown-rated. Torsional backlash is 28 arcmin maximum — that's a standard precision class for a straight-tooth planetary; if your application needs tighter positioning repeatability, a low-backlash or helical gearbox would be a different selection.
Obsolete — sourcing reality for the GBX0400090702F
Available through independent surplus and broker channels. Quantities are lot-specific; we confirm availability and pricing at RFQ against your BOM line. The 40 mm frame size and 9:1 ratio are common enough that a parametric cross-reference may exist in the GBX family, but no direct pin-compatible replacement is documented.