Planetary gearbox for precision motion — 15:1 reduction, 230 N.m continuous
The GBX1200150552F is a straight-tooth planetary gearbox from Schneider Electric's GBX series, sized for servo or stepper motor output stages where a 15:1 reduction is needed. It delivers 230 N.m continuous torque at 100 rpm and 30 °C, with a peak capability of 368 N.m at the same speed and temperature. The 94 % efficiency means the gearbox loses only 6 % of input power as heat — a meaningful figure when sizing the motor and thermal budget in a closed-loop positioning system.
Torque, backlash, and service life — the numbers that govern fit
Continuous torque of 230 N.m at 100 rpm defines the steady-state load the gearbox can carry across its 30,000-hour service life at 30 °C. Maximum output torque of 368 N.m at the same speed is the peak limit for acceleration or momentary overloads — not a sustained rating. Maximum torsional backlash is 12 arcmin. For indexing or positioning applications where repeatability matters, this figure sets the angular deadband between the input and output shafts under reversing loads. Torsional rigidity of 13 N.m/arcmin gives the stiffness curve: at 230 N.m continuous, the shaft wind-up is about 17.7 arcmin under load, which must be factored into the total compliance budget of the axis.
Sourcing and lifecycle — obsolete, quoted to order
Schneider Electric lists the GBX1200150552F as obsolete. Available through independent distribution channels — quantities are confirmed at RFQ.
Mounting and environmental limits
The gearbox has a 120 mm external diameter and a black anodized aluminium housing. Shaft output carries an IP54 rating — protected against dust ingress and splashing water, but not submersion or high-pressure washdown. The unit ships lubricated for life — no oil-change interval to schedule. Maximum axial force Fa is 2100 N at 100 rpm for the 30,000-hour service life, rising to 2800 N for a 10,000-hour duty. Maximum radial force Fr is 1500 N at 100 rpm for 30,000 hours, or 2000 N for 10,000 hours — both measured with the force applied at mid-distance from the output shaft. Shaft material is C45 carbon steel. Noise level at 1 m under no-load is 65 dB.