Obsolete — sourcing reality for the GBX0800031404F
If your BOM calls this exact order code, the fit is confirmed only for this part; a parametric substitute would require a full mechanical and torque review.
Torque and ratio — the sizing numbers that matter
The GBX0800031404F delivers a continuous output torque of 85 N.m at 100 rpm and 30 °C, with a maximum output torque of 136 N.m at the same conditions — the peak ceiling for short-duration overloads. The 3:1 reduction ratio sets the speed/torque tradeoff: input speed is three times output speed. Rated service life is 30,000 hours at 100 rpm and 30 °C — this is the L10 life under continuous rated load. If your duty cycle runs at higher speed or temperature, derate the life accordingly; the gearbox is lubricated for life, so no oil-change interval extends the service window.
Mechanical limits — shaft loads and backlash
Maximum axial force on the output shaft is 1200 N for a 10,000-hour life at 100 rpm and 30 °C, dropping to 900 N for the full 30,000-hour rating. Maximum radial force (applied at mid-shaft) is 950 N for 10,000 hours or 650 N for 30,000 hours. These are the bearing load limits — exceeding them shortens service life or causes premature failure. Maximum torsional backlash is 9 arc-minutes — this is the angular play between input and output under reversing load. For positioning applications (indexing, pick-and-place), this sets the repeatability floor; if your system needs tighter than 9 arc-min, this gearbox is not the fit. Torsional rigidity is 6 N.m/arcmin — the stiffness under load before windup. A higher number means less angular deflection per unit torque, which matters for servo-driven axes where the gearbox stiffness contributes to the overall system bandwidth.
Efficiency, noise, and environmental fit
Listed efficiency is 94 % — this is the power transmission efficiency at rated load and speed. For a 3:1 planetary stage, this is typical; the 6 % loss is mostly gear mesh friction and bearing drag, dissipated as heat within the black anodized aluminium housing. Noise level is 60 dB at 1 m, no-load — this is the acoustic emission from the straight-cut gear teeth under no-load spin. Under load, noise will increase; straight teeth are inherently noisier than helical, so if the gearbox runs in an operator-occupied area, factor in the sound level. Shaft output is rated IP54 — the housing seals against dust ingress and splashing water at the output shaft. The gearbox body itself is not fully sealed; the IP rating applies to the shaft exit point. Ambient operating range is -25 to 90 °C, covering most indoor industrial environments.