Defining the GBX1200400841D
A planetary gearbox, reduction 40:1, straight-cut gears, in the GBX series with a 120 mm external diameter — built as a bolt-on output stage that drops between a servo or stepper drive and the machine shaft.
Sizing the gearbox against the load
Torsional rigidity sits at 13 N.m/arcmin and maximum torsional backlash is 12 arc.min — backlash is the slack you must budget into positioning accuracy, and rigidity is what holds that figure under load without wind-up. Service life is 30000 h at 100 rpm at 30 °C, which fixes the envelope for both the radial and axial load ratings published alongside it.
Shaft loading at the gearbox output
Maximum radial force Fr is 1500 N at 100 rpm over the 30000 h life (2000 N at 100 rpm over a 10000 h life), force applied at mid-distance from the output shaft — the mid-span figure is the realistic case because most couplings and pulleys do not sit flush against the gearbox face. Maximum axial force Fa is 2100 N at 100 rpm over the 30000 h life (2800 N at 100 rpm over a 10000 h life) — axial capacity drops alongside life the same way radial does, so a heavy-overhung load that drops the design life to 10000 h buys back load headroom at the cost of service hours.
Mechanical and environmental envelope
Output shaft seal is IP54 with the housing in black anodized aluminium and a C 45 shaft — IP54 keeps dust and splashed water out, which is enough for a typical cabinet-interior or sheltered-machine mounting but not for a washdown cell. Operating temperature runs -25...90 °C and the unit mounts in any position — the lubricant is sealed for life, so orientation never reaches a refill interval within the design life. Efficiency is 94 % and noise level is 65 dB at 1 m, no-load — efficiency is what the motor has to make up thermally, and the noise figure is the no-load baseline that rises slightly once the gears are under torque.
Sourcing the obsolete line item
marks the part obsolete, so the only fresh-supply path is independent distribution holding traceable stock — quoted against the BOM quantity with availability and pricing confirmed at RFQ, never an immediacy promise.