Planetary gearbox, 120 mm, 5:1 — what the ratings mean
The GBX1200050703F is a straight-tooth planetary gearbox from the GBX series, 120 mm external diameter, with a 5:1 reduction ratio. It delivers 195 N.m continuous output torque at 100 rpm and 30 °C, with a peak of 312 N.m under the same conditions. Efficiency is listed at 94 %, and the no-load noise level is 65 dB measured at 1 m — both figures at the rated speed. The rated service life is 30,000 hours at 100 rpm and 30 °C, with the gearbox lubricated for life. Maximum torsional backlash is 8 arc.min, and torsional rigidity is 12 N.m/arcmin — these numbers govern positioning accuracy in servo or indexing applications where repeatability matters.
Sourcing reality — obsolete, quoted to order
Schneider Electric has marked the GBX1200050703F as obsolete. The part is available through independent surplus and broker channels. No stock-holding claim is made — each order is sourced against the BOM.
Mechanical limits and mounting
Maximum axial force Fa is 2100 N at 100 rpm for the 30,000-hour service life, or 2800 N for a 10,000-hour life. Maximum radial force Fr is 1500 N at 100 rpm (mid-shaft) for 30,000 hours, or 2000 N for 10,000 hours. Shaft output is rated IP54, meaning the output seal resists dust ingress and splashing water — suitable for dry indoor environments but not washdown. The housing is black anodized aluminium; the shaft material is C45 steel.