What 115 N.m continuous and 184 N.m peak mean for your axis
The GBX0800040553F is a 80 mm-diameter planetary gearbox with a 4:1 reduction ratio. Continuous output torque is 115 N.m at 100 rpm and 30 °C ambient; maximum output torque hits 184 N.m under the same conditions — that 1.6x peak gives you headroom for acceleration and occasional overload without oversizing the frame. Rated service life is 30000 hours at 100 rpm and 30 °C, with the gearbox lubricated for life — no maintenance oil changes, which matters for sealed-into-the-machine applications.
Efficiency, backlash, and noise — the fit details
Listed efficiency is 94 % — that's about 6 % of input power lost as heat, which the black anodized aluminium housing (80 mm OD) has to sink. For a continuously running axis, that heat load needs to be considered in the enclosure thermal budget. Maximum torsional backlash is 9 arc.min — that's the lost motion between input and output under reversing load. For positioning applications, this sets the repeatability floor; for simple speed-reduction drives it's less critical. Noise level is 60 dB at 1 m, no-load — a moderate figure that won't dominate a typical machine floor but should be noted if the gearbox is in an operator-adjacent area.
Sourcing reality — obsolete, available through independent channels
The part is available through independent surplus and broker channels. Quantities are confirmed per RFQ; expect lot-specific pricing and no manufacturer warranty — standard for this sourcing route.
Shaft loads and sealing — mounting constraints
Maximum axial force (Fa) is 1200 N at 100 rpm for 10000 hours, derating to 900 N for the full 30000-hour life. Maximum radial force (Fr) is 950 N at mid-shaft for 10000 hours, 650 N for 30000 hours. These are the limits for bearing life — overhung loads from belt drives or pinions need to be checked against these curves. Shaft output seal is IP54 — splash-proof, not washdown-rated. The housing is black anodized aluminium, shaft material C45 (medium carbon steel). Ambient operating range is -13 to 194 °F (-25 to 90 °C).