Planetary gearbox with straight teeth — 32:1 reduction
The GBX1200320701F is a planetary gearbox from Schneider Electric's GBX family, with a 32:1 reduction ratio and straight-cut teeth. The straight tooth profile means it's inherently noisier than a helical — expect 65 dB at 1 m under no-load — but it eliminates axial thrust loads on the output bearings, which simplifies the mounting structure when you're coupling to a belt drive or a pinion. The 120 mm housing diameter and black anodized aluminium body (C 45 steel shaft) give it a compact envelope for servo-class applications where panel space is tight. The shaft output seal is rated IP54 — fine for dry indoor environments with occasional dust, but not for washdown zones.
Torque ratings and service life — what the numbers mean for your load
Continuous output torque is 260 N.m at 100 rpm and 30 °C ambient — that's the number to match against your motor's stall torque and duty cycle. The maximum output torque peaks at 416 N.m under the same conditions, but that's a transient limit for acceleration or shock loads, not a steady-state rating. Service life is rated at 30,000 hours at 100 rpm and 30 °C. If your application runs at higher speed or temperature, the actual life shortens — the axial and radial force limits also derate with speed. At 100 rpm, maximum axial force (Fa) is 2100 N for the full 30,000-hour life, or 2800 N if you accept a 10,000-hour replacement interval. Radial force (Fr) follows the same pattern: 1500 N for 30,000 hours, 2000 N for 10,000 hours. Torsional rigidity is 13 N.m/arcmin — that's the stiffness figure that governs positioning accuracy under load. For a pick-and-place or indexing axis, this tells you how much windup you get before the output moves. Maximum torsional backlash is 12 arcmin, which is standard precision for a straight-tooth planetary — adequate for general motion, not for a zero-backlash servo stage.
Obsolete — sourcing through independent channels
Schneider Electric lists the GBX1200320701F as obsolete. Available through independent surplus and broker channels. Quantities are lot-specific, and the unit is lubricated for life — no field maintenance needed, but verify the seal condition and storage history on any NOS unit. Pricing and lead time confirmed at RFQ against your BOM quantity.