Planetary gearbox, 16:1, 260 N.m continuous — what the torque ratings mean
The GBX1200160552F is a 120 mm-diameter planetary gearbox with straight-cut teeth and a 16:1 reduction ratio. It delivers 260 N.m continuous output torque at 100 rpm and 30 °C, with a peak capability of 416 N.m under the same conditions. The 94 % efficiency figure means about 6 % of input power is lost as heat through the gear mesh — typical for a single-stage planetary with straight teeth. The maximum rating covers short-duration peaks during acceleration or momentary overload — but the 30000-hour service life at 100 rpm and 30 °C is calculated against the continuous torque, not the peak. Push it past 260 N.m continuously and the L10 life drops below the 30000-hour mark.
Obsolete — sourcing reality for the GBX1200160552F
Availability is through independent surplus and broker channels only. Quantities are lot-specific and confirmed at RFQ time — no stock-holding claim from the original factory channel. The lubricated-for-life design means a unit from surplus stock still carries the factory grease charge; no field lubrication is required before installation.
Shaft loads and backlash — fit constraints for the replacement buyer
Maximum axial force Fa is 2100 N at 100 rpm for the 30000-hour life target, or 2800 N if the application only needs 10000 hours. Radial force Fr at mid-span on the output shaft is 1500 N for the long-life case, 2000 N for the short-life case. These are the load limits that govern bearing life — exceed them and the gearbox fails before the 30000-hour mark. Torsional backlash is 12 arc-min maximum — typical for a standard-precision planetary with straight teeth. Torsional rigidity is 13 N.m/arcmin, meaning the output shaft twists 1 arc-minute for every 13 N.m of applied torque. For a servo-driven indexing application with frequent direction reversals, the backlash and wind-up together define the positioning deadband at the load. The shaft output seal is rated IP54 — dust-protected and splash-resistant, but not submersible. The housing is black anodized aluminium, the shaft is C45 carbon steel. Ambient operating range is -25 to 90 °C, which covers most indoor industrial environments but not washdown or outdoor direct-exposure duty.