The GBX0400030704F is a 40 mm diameter planetary gearbox with straight teeth and a 3:1 reduction ratio. The 94 % efficiency is the ratio of output power to input power at rated load — for a 3:1 stage this is typical of a well-lubricated planetary set, meaning about 6 % of input power is lost to friction and windage inside the housing. Maximum torsional backlash is 24 arcmin — that is the rotational play between input and output when the load reverses. For positioning applications this number tells you the repeatability floor: a 24 arcmin gap at the output shaft translates to about 0.4 mm of linear error at a 50 mm lever arm, so it suits indexing or conveyor drives where absolute positioning tolerance is not sub-millimetre. Service life is rated 30,000 hours at 100 rpm and 86 °F (30 °C) — the gearbox is lubricated for life, so no maintenance oil changes. The axial and radial force limits drop from 200 N to 160 N if you extend the service target from 10,000 to 30,000 hours at the same speed and temperature.
Obsolete — sourcing reality for the GBX0400030704F
Schneider Electric lists the GBX0400030704F as obsolete. The part is available through independent surplus channels — quantities are lot-specific and confirmed at RFQ. No pin-compatible drop-in replacement exists from Schneider; a different GBX series variant or a third-party planetary gearbox with the same 40 mm frame and 3:1 ratio would require checking the shaft dimensions, keyway, and mounting flange.
Integration notes — mounting and environment
The housing is black anodized aluminium, 40 mm external diameter, with C 45 steel shafts. Operating temperature range is -13 to 194 °F (-25 to 90 °C), so it fits inside a standard IP54 control cabinet or a ventilated drive enclosure without derating. The straight-tooth planetary design means slightly higher noise than a helical-cut gearbox at the same ratio, but lower cost and simpler bearing loading.