Planetary gearbox, 60:1, 260 N.m — now obsolete
The Schneider Electric GBX1200600702F is a planetary gearbox with straight teeth, 120 mm housing diameter, and a 60:1 reduction ratio. It delivers 260 N.m continuous output torque at 100 rpm and 30 °C, with a peak rating of 416 N.m under the same conditions.
Continuous torque of 260 N.m at 100 rpm and 30 °C sets the thermal limit for sustained duty — the gearbox can hold that load indefinitely without exceeding the rated service life of 30,000 hours. The peak rating of 416 N.m covers acceleration and intermittent overloads, but the duty cycle must stay within the thermal envelope. Torsional rigidity of 12 N.m/arcmin means the shaft twists 1 arcminute per 12 N.m of applied torque — a stiffness figure that matters for positioning accuracy in servo-driven indexing or pick-and-place axes. Backlash is 14 arcmin, which is standard for a straight-tooth planetary; if the application needs tighter positioning, a low-backlash or helical gearbox would be required. Maximum axial force (Fa) is 2100 N at 100 rpm for the 30,000-hour life target, rising to 2800 N if the service life is reduced to 10,000 hours. Radial force (Fr) at the shaft midpoint is 1500 N for the longer life, 2000 N for the shorter. These are the load limits on the output bearing — overshoot them and the bearing life drops faster than the derating curve suggests. Efficiency is 90 % — typical for a single-stage planetary with straight teeth. The 10 % loss is mostly gear mesh friction and bearing drag; at 260 N.m output, the heat generated is about 29 W, which the aluminium housing dissipates without forced cooling in most panel-mount or machine-frame installations.
Mounting, sealing, and environmental limits
The housing is black anodized aluminium, 120 mm outer diameter, and can be mounted in any position. The shaft output seal is rated IP54 — splash-proof but not washdown; if the gearbox sits in a wet or hosedown zone, a shaft seal upgrade or a boot is needed. The gearbox is lubricated for life — no oil changes or regreasing intervals. The shaft is C45 carbon steel; if the application runs in a corrosive environment, the shaft surface needs protection. Noise level is 65 dB at 1 m, no-load — audible but not loud for a 120 mm planetary at 100 rpm. Under load the noise rises with torque and speed; the straight-tooth mesh generates more whine than a helical, so if the gearbox runs near a work cell, acoustic enclosure may be needed.
Sourcing an obsolete GBX — what to expect
Schneider's lifecycle status is obsolete — no official successor part number is published for this GBX frame size and ratio. The GBX series has been superseded by newer planetary families (BCH, Lexium) that use different mounting flanges and shaft dimensions, so a direct drop-in replacement is unlikely without mechanical adaptation. Available through independent surplus and broker channels. Quantities are lot-specific — confirmed at RFQ against the exact BOM quantity. No stock-holding claim; each order is sourced per request.