Screen speed, torque, heat loss, and procurement next steps for a worm reducer gearbox, including the alias query 5:1 worm reduction gearbox. The default case is a 0.50 kW, 1500 rpm, 5:1 reducer.
OutputOutput screen
ThermalThermal warning
HoldingHolding boundary
The alias query belongs on this worm reducer gearbox page because it asks for a ratio-specific version of the same product family. The decision is not whether a separate page is needed; the decision is whether a 5:1 worm reducer is thermally, mechanically, and commercially suitable.
Evidence: S2, S3
A 5:1 worm reduction gearbox usually sits in the high-efficiency, backdrivable part of the worm-reducer range. Do not specify it when static holding is the primary safety function.
Evidence: S1, S4
For continuous duty, lost power becomes heat. The calculator flags heat loss and duty hours before treating output torque as usable capacity.
Evidence: S1
Shock, starts, mounting position, lubrication, ambient temperature, and run-in state change the service factor and final reducer rating.
Evidence: S2
If lifecycle efficiency matters more than compact right-angle layout or cost, compare the 5:1 worm reducer against bevel or planetary alternatives.
The table separates ratio selection from holding assumptions. For procurement, the important distinction is that high efficiency and self-locking point in opposite directions.
| Reduction ratio | Efficiency screen | Holding assumption | Decision use |
|---|---|---|---|
| 5:1 | 82% to 88% screening band | Backdrivable; add brake if holding matters | Good first screen for compact, quiet right-angle transfer with moderate heat. |
| 10:1 | 78% to 84% screening band | Usually backdrivable | Still efficiency-led; verify thermal rating for long duty. |
| 20:1 to 40:1 | 58% to 74% screening band | Conditional, not safety-rated by itself | Escalate thermal review, lubricant, and casing temperature. |
| 50:1 and above | Often near or below 50% by application | May self-lock statically, never use as sole hoist safety | Use only with OEM rating, brake strategy, and duty validation. |
The tool deliberately exposes its calculation path so the result can be challenged. A fast screen is useful only when the hidden assumptions are visible next to the output.
| Step | Formula | Known limit |
|---|---|---|
| Output speed | input speed / ratio | Does not include motor slip, VFD limits, or downstream stages. |
| Input torque | power kW x 9550 / input rpm | Assumes steady input power at the entered shaft speed. |
| Output torque | input torque x ratio x estimated efficiency | Screening value only; catalog torque and thermal capacity remain controlling. |
| Heat loss | input power x (1 - estimated efficiency) | Ambient temperature, housing size, mounting, airflow, and lubricant are not modeled. |
Sources below support the screening rules. Where exact catalog ratings are not public, the page marks the item as a procurement question instead of inventing a final rating.
| ID | Source | Date marker | Used for |
|---|---|---|---|
| S1 | ANSI/AGMA 6034-C21 Practice for Enclosed Cylindrical Wormgear Speed Reducers and Gearmotors AGMA / MPMA | ANSI approval: 2021-04-09; page reviewed 2026-07-23 | Quick-screen scope, speed envelope, service factor, thermal capacity, lubrication, and self-locking cautions. |
| S2 | S and W gear units efficiency behavior SEW-EURODRIVE | Edition: 11/2025; page reviewed 2026-07-23 | Explains worm-stage efficiency dependence on ratio, input speed, and ambient temperature. |
| S3 | Self-locking in helical-worm gear units SEW-EURODRIVE | Edition: 11/2025; page reviewed 2026-07-23 | Supports the rule that high-efficiency worm stages should not be treated as safety holding devices. |
| S4 | ISO/TR 14179-1:2001 Gears - Thermal capacity - Part 1 ISO | Publication: 2001-07; page reviewed 2026-07-23 | Thermal capacity context: analytical heat-balance method under defined ambient and oil-sump assumptions. |
A 5:1 worm reducer is not automatically the best low-ratio gearbox. The better choice depends on package shape, efficiency, holding, backlash, cost, and duty cycle.
| Option | Best for | Tradeoff | Use when |
|---|---|---|---|
| 5:1 worm reducer gearbox | Compact 90-degree layout, low noise, moderate cost | Lower efficiency than bevel or planetary at the same ratio | Packaging and noise matter more than peak efficiency. |
| Right-angle bevel gearbox | Higher efficiency and better continuous-duty thermal margin | Usually higher precision and cost requirements | Energy loss, speed, or duty cycle is the limiting constraint. |
| Inline planetary gearbox | High torque density, stiffness, and low backlash | Not inherently a 90-degree transfer | Robot wheel, steering, or servo-axis packaging allows inline drive. |
| Higher-ratio worm reducer | Large speed reduction in one compact unit | More heat and lower efficiency | Duty is intermittent and OEM thermal rating supports the load. |
Keep the 5:1 worm reduction gearbox decision on this canonical page, then move sideways only when the requirement changes architecture, evidence depth, or RFQ readiness.
Use this broader page when the requirement is not locked to a reducer-style 5:1 ratio and needs general worm gearbox screening.
Use this path when the buyer wording emphasizes right-angle layout before reducer sizing.
Use this comparison when 5:1 efficiency, heat loss, or battery runtime matters more than worm-drive simplicity.
Move from quick screening into product-family requirements, mounting, ratio options, and quotation context.
Send duty cycle, ratio, motor data, mounting, ambient temperature, and holding requirements for OEM review.
Signal: Treating a 5:1 worm reducer as self-locking
Mitigation: Specify a brake, holding device, or safety-rated axis lock when load holding matters.
Signal: Selecting worm drive only for low purchase price
Mitigation: Compare heat loss, energy use, lubrication interval, and downtime against bevel or planetary drives.
Signal: Continuous duty above 16 h/day or high ambient temperature
Mitigation: Request OEM thermal power rating, sump temperature limits, and mounting-position correction.
Signal: High starts per hour, impact load, or short acceleration cycles
Mitigation: Use a higher service factor and confirm tooth contact pattern after run-in.
Assumptions: 0.5 kW motor, 1500 rpm input, 5:1 ratio, 8 h/day
Outcome: Output speed near 300 rpm with moderate heat loss.
Action: Proceed to quote if catalog torque exceeds screened torque after service factor.
Assumptions: 5:1 ratio requested for compact packaging
Outcome: Backdrivable behavior is likely; self-locking is not a safety control.
Action: Add brake or change architecture before relying on the reducer.
Assumptions: Continuous duty, warm ambient, high starts per hour
Outcome: Thermal capacity can become the controlling constraint before tooth strength.
Action: Ask for thermal rating, lubricant plan, and housing temperature estimate.
Assumptions: Battery-powered duty with frequent acceleration
Outcome: Worm heat loss may reduce runtime compared with bevel or planetary options.
Action: Compare lifecycle power loss before freezing gearbox architecture.
Public sources do not provide one universal thermal rating for every 5:1 worm reduction gearbox. Housing size, center distance, wheel material, lubricant, ambient temperature, and mounting position make the final rating vendor-specific.
Known
Ratio, speed, power, estimated heat loss, and backdrive boundary.
Unknown
Exact thermal power rating, lubricant correction, and casing temperature.
Minimum action
Request an OEM selection sheet before purchase approval.
Include the calculated torque target, duty hours, shock profile, holding requirement, and any ambient-temperature limit. Ask for thermal rating and service-factor confirmation in the same request.
