The GBX0600030701D: The 3:1 reduction ratio triples the motor-side torque at the output shaft while cutting output speed by the same factor — a standard ratio for stepping up torque from a servo or stepper motor without needing a second reduction stage. Continuous output torque is 28 N.m, with a maximum peak of 45 N.m — the 17 N.m headroom handles acceleration transients and intermittent overloads, but sustained operation above 28 N.m shortens the 30,000-hour service life at 100 rpm and 30 °C. 96 % efficiency means 4 % of the transmitted power is lost as heat inside the gearbox — at 28 N.m and 100 rpm output (roughly 293 W mechanical), the heat loss is about 12 W, which the black anodized aluminium housing dissipates without forced cooling in most panel environments.
Backlash and rigidity — positioning precision limits
Maximum torsional backlash is 20 arc.minutes — acceptable for general positioning and indexing where the load doesn't reverse direction under torque, but too loose for a closed-loop axis that needs repeatable bidirectional positioning below 0.1°. Torsional rigidity is 2.3 N.m/arcmin — under the 28 N.m continuous load, the gearbox wind-up is roughly 12 arc.minutes, which adds to the static backlash and must be accounted for in the servo loop gain if the encoder is on the motor side.
Shaft loads and bearing life — don't overhang the output
Maximum radial force at mid-span on the output shaft is 340 N at 100 rpm for the full 30,000-hour service life at 30 °C — exceeding this derates the bearing life; at 500 N the service life drops to 10,000 hours. Maximum axial force is 450 N at 100 rpm for 30,000 hours at 30 °C — axial loads above this, such as from a helical pinion pushing into the gearbox, force a shorter replacement interval or a larger frame size. The shaft output carries an IP54 rating — protects against dust ingress and splashing water, but not submersion or high-pressure washdown; the sealing at the shaft exit is the wear item, not the anodized housing.
Active production — sourced against a BOM line
Lubricated for life — no maintenance grease ports or scheduled re-lubrication; the gearbox is sealed at the factory and replaced as a unit at end of service life.