Planetary gearbox, 60 mm frame, 8:1 reduction
The GBX0600080704F is a 60 mm diameter planetary gearbox from Schneider Electric's GBX series, delivering an 8:1 reduction ratio with straight-cut teeth. It is rated for 18 N.m continuous output torque at 100 rpm and 30 °C, with a peak capacity of 29 N.m at the same speed. Efficiency sits at 94 %, which is typical for a single-stage planetary stage with straight teeth — the power loss is mainly gear mesh friction and bearing drag, not heat buildup in the housing. The 58 dB noise level at 1 m, no-load, puts it in the range of a quiet office printer; in a machine-tool cabinet with other rotating equipment, it will not be the dominant acoustic source.
Torque, backlash, and service life — the load-bearing specs
Continuous torque is 18 N.m at 100 rpm and 30 °C; maximum torque reaches 29 N.m under the same conditions. The 16 arc.min maximum torsional backlash means the output shaft can rotate up to 0.27° before the input gear engages — acceptable for positioning axes where the load holds position against a brake or motor holding torque, but not for zero-backlash servo applications. Service life is rated at 30,000 hours at 100 rpm and 30 °C, lubricated for life with no regreasing interval. The torsional rigidity of 2.3 N.m/arcmin tells you how much the gear train winds up under load — at 18 N.m continuous, the wind-up is about 7.8 arcmin, which is within the backlash budget but adds to the total positioning error in a bidirectional move. Maximum axial force on the output shaft is 450 N for the full 30,000-hour life, or 600 N if you accept a 10,000-hour service interval. Radial force limits are 340 N and 500 N respectively, measured at mid-span on the output shaft. These are the bearing life limits — exceeding them shortens the service life proportionally.
Sourcing an obsolete planetary gearbox
The GBX0600080704F is listed as Obsolete by Schneider Electric. This means the part is no longer manufactured and is not available through the standard Schneider distribution channel. Availability is through independent surplus and broker channels — quantities are lot-specific and confirmed at RFQ.
Mounting and environmental fit
The housing is black anodized aluminium, 60 mm external diameter, with a C 45 steel output shaft. The shaft output seal carries an IP54 rating — splash-resistant from the shaft side, but the motor-side interface and mounting flange are not separately rated, so the assembly's overall ingress protection depends on the mating motor and the enclosure it mounts into. The straight-tooth geometry generates more audible whine than a helical gear at the same load — the 58 dB figure is at no-load; expect a few dB increase under full torque.