12:1 planetary gearbox, 120 mm frame — the torque numbers that matter
The GBX1200121402F is a straight-tooth planetary gearbox from Schneider's GBX series, with a 120 mm housing diameter and a 12:1 reduction ratio. It delivers 260 N.m continuous output torque at 100 rpm — enough for indexing tables, conveyor drives, and positioning axes where you need a compact, lubricated-for-life package. Peak torque hits 416 N.m under the same conditions, so you've got headroom for acceleration and occasional overloads. The torsional rigidity rating of 13 N.m/arcmin means the gearbox resists windup under load — important for positioning accuracy in servo-follower applications.
Efficiency, noise, and the 30,000-hour service life
Listed at 94% efficiency, so about 6% of the input power turns into heat. That's typical for a single-stage planetary — the straight teeth are a little noisier than helical, but the 65 dB at 1 m no-load is quiet enough for a machine-side mount without an enclosure. Rated service life is 30,000 hours at 100 rpm and 30°C ambient. It's lubricated for life — no oil changes, no breather, no maintenance schedule beyond the bearing check at overhaul. The operating range is -25 to 90°C, so it lives in unheated warehouses or next to a hot motor without derating.
What the IP54 and force ratings mean for mounting
Shaft output is IP54 — protected against dust ingress and splashing water, but not washdown. The black anodized aluminium housing keeps corrosion at bay in dry indoor environments. Shaft material is C45 carbon steel, which is standard for keyed output shafts in this torque class. Maximum axial force (Fa) is 2100 N for the full 30,000-hour life, or 2800 N if you accept a shorter 10,000-hour service interval. Radial force (Fr) at the shaft midpoint is 1500 N for the long life, 2000 N for the short. These are the numbers that govern bearing life — if your application exceeds them, expect premature failure at the output bearing.
Obsolete — sourcing reality for the GBX1200121402F
Schneider lists this gearbox as obsolete. The only channel is independent surplus and broker stock, where quantities are lot-specific and confirmed at RFQ. No direct pin-compatible replacement exists in the current Schneider catalog for this 120 mm frame, 12:1 ratio, 260 N.m continuous torque point. If your BOM calls out this exact part, the practical path is sourcing from distribution surplus or finding a functional equivalent from another manufacturer with matching shaft dimensions and mounting pattern.