Hybrid tool + reportCanonical alias pagePublished July 23, 2026Reviewed October 10, 2026
Right Angle Worm Gearbox (90 Deg) Fit Checker
Screen a 5:1 right angle worm gearbox request with your shaft power, speed, and efficiency assumption. Review the calculation limits, compare right-angle architectures, and prepare the RFQ data a supplier needs to confirm fit.
Evidence sources
4
Architecture paths
4
RFQ fields
5
5:1 right-angle worm gearbox checker
Enter gearbox shaft power, the selected or assumed efficiency, speed, duty, starts, shock, and holding requirement. This screen calculates estimates; supplier ratings decide model fit.
Ratio presetLowest ratio preset; enter a vendor efficiency if you have one.
Use mechanical shaft power delivered to the gearbox at this operating point, not electrical input power. A motor nameplate value is only a rough proxy if actual load is unknown.
Use the selected unit’s catalog value when available. The 82% default is an example assumption, not a worm gearbox rating or a value inferred from ratio.
Shock level
Holding requirement
Ready for a 5:1 screen
Calculate output speed, torque using your efficiency assumption, estimated gearbox loss, and review prompts.
Conclusion first
Decision report for right-angle worm gearbox selection
The main goal is not to prove that every 5:1 request needs a worm gearbox. The goal is to screen ratio, heat, holding, and architecture fit early enough that the RFQ asks for the right rating evidence.
Key conclusions
Use this table before scanning detailed evidence.
| Decision | Evidence | Action |
|---|---|---|
| Canonical intent | 5:1 right angle worm gearbox is a ratio-specific request inside the right angle worm gearbox topic. | Keep the query on this canonical URL and use the 5:1 preset in the checker. |
| Best fit signal | A 5:1 worm stage can be compact, quiet, and inexpensive when duty is moderate and holding is not safety-rated. | Validate output speed, torque, heat loss, and mounting before sending an RFQ. |
| Escalation signal | Long duty, frequent starts, shock loading, high ratios, or safety holding increase the need for model-specific rating data. | Ask for thermal rating, brake strategy, lubricant position, and service factor confirmation. |
| Alternative path | Bevel, hypoid, or multi-stage right-angle designs may suit efficiency-led applications; whole-unit performance varies by product and duty. | Compare full-unit efficiency, ratio range, footprint, and power loss before locking the architecture. |
Ratio review prompts
A simple escalation guide for this page, not a product rating.
The ratio prompts only direct users to the next supplier data to request. The checker never infers efficiency or thermal fit from ratio alone; exact product ratings and application conditions control selection.
Ratio and supplier data checklist
Use these prompts to prepare model-specific rating questions.
| Ratio | Efficiency input | Decision use |
|---|---|---|
| 5:1 | Enter vendor efficiency, or use the clearly marked example default. | Screen speed and torque; confirm rated output torque and thermal capacity. |
| 10:1 | Use the selected unit’s efficiency at the relevant load and speed. | Check duty cycle, application factor, and rated output torque. |
| 20:1 | No ratio-only efficiency value is assumed. | Include the supplier thermal rating in the RFQ review. |
| 40:1 | Confirm efficiency and permissible input power for the exact unit. | Confirm thermal capacity at the real duty, ambient, and mounting. |
| 80:1 | This page does not infer efficiency from ratio. | Escalate for supplier rating; this preset is not a fit approval. |
Thermal path
Why the tool reports heat loss instead of torque alone.
The loss estimate is calculated from the entered shaft power and efficiency assumption. It indicates power converted to losses under that assumption; compare duty, ambient, mounting, and the supplier’s thermal rating before selection.
Architecture comparison
Keep worm benefits visible without hiding alternatives.
| Architecture | Advantage | Caution | Use when |
|---|---|---|---|
| Right angle (90 deg) worm gearbox | Compact right-angle package, quiet mesh, and a broad single-stage ratio range in some product families. | Sliding contact can reduce efficiency, especially at higher ratios. Efficiency, permissible power, and thermal capacity are model- and condition-specific. | A compact right-angle layout or a higher single-stage ratio helps the design, and the exact unit passes its rating checks. |
| Right angle bevel gearbox | Can provide high efficiency for suitable ratios; compare complete reducer data, including any helical stages. | A single bevel stage may have a lower ratio range; holding still needs a separately rated brake or lock unless a rated integrated device is selected. | Catalog data confirms an efficiency or thermal advantage for the required ratio, load, and duty. |
| Hypoid right angle gearbox | Some product families provide a compact offset-shaft right-angle layout; complete-unit efficiency depends on the exact design and ratio. | Efficiency, available ratios, lubricant, and cost vary by product family. | Unit-specific data shows a better efficiency/thermal fit for the required offset layout. |
| Planetary plus right-angle stage | A paired planetary and right-angle stage can combine reduction with a compact shaft turn; torque and backlash depend on both units. | More parts, longer stack, and often higher price. | Precision, shock-load capacity, or lifecycle efficiency is a priority and the combined stages meet the package constraints. |
Method and limits
How the checker turns sparse RFQ wording into a defensible engineering screen.
Speed and torque
Output speed is input speed divided by ratio. Torque uses 9550 × shaft input kW ÷ input rpm × ratio × entered efficiency.
Heat loss
Estimated gearbox loss is shaft input power × (1 − entered efficiency); it is not the unit’s thermal capacity.
Holding boundary
Parking preference is informational; safety holding triggers brake or lock review.
Vendor rating
Final selection needs catalog thermal power, shaft loads, mounting, lubricant, and service factor.
The 82% default is an example assumption only. Use the selected gearbox’s efficiency at the relevant load and speed when available. Ratios, duty, shock, and starts create page review prompts; none replaces the manufacturer’s service factor and thermal rating.
Default 5:1 screening trace
Reproducible example using 0.40 kW shaft input, 1500 rpm, 5:1, and the page’s clearly marked 82% efficiency assumption.
| Metric | Screen value | How to use it |
|---|---|---|
| Input case | 0.40 kW shaft input, 1500 rpm, 5:1, 82% assumed efficiency | Illustrative default case; use gearbox shaft power at the operating point and replace the efficiency with vendor data when available. |
| Output speed | 300 rpm | Input speed divided by the 5:1 ratio before downstream reduction. |
| Output torque | 10.4 Nm | Power-derived input torque multiplied by ratio and the entered 82% efficiency assumption. |
| Heat loss | 0.07 kW | Power not delivered to the output shaft; still confirm vendor thermal rating. |
| Application review | Confirm duty and service factor | Starts, shock, duty, and the supplier application factor must be reviewed against the actual load profile. |
Risk and mitigation matrix
Failure modes and the supplier data that resolves each risk.
| Risk | Trigger | Mitigation |
|---|---|---|
| Lubrication starvation in 90-deg mounting | Switching from worm-over to worm-under without adding oil. | Boston Gear notes that some worm-under units need up to 50% more lubricant than worm-over. Verify fill quantity for the exact model and mounting position. |
| Exceeding the unit or lubricant temperature limit | Continuous loss, ambient heat, or mounting pushes the exact product beyond its published limit. | Get the permissible thermal rating and lubricant temperature range for the selected model and operating conditions. |
| Thermal overload | High duty, low efficiency, poor airflow, or small housing. | Ask for thermal power rating at ambient temperature and mounting position. |
| False self-locking assumption | Using worm geometry as a safety brake. | Use a brake or lock designed and rated for the safety function. |
| Lubrication mismatch | Vertical shaft, sealed-for-life unit, or inverted mounting. | Confirm oil level, breather, seal orientation, and service interval. |
| Output shaft overload | Cantilever load, belt pull, wheel load, or shock starts. | Validate radial/axial load and bearing life, not torque alone. |
| Ratio-only RFQ | Spec says only "5:1 right angle worm gearbox". | Add power, speed, duty, mounting, load direction, and environment. |
RFQ packet
Minimum fields to turn a 5:1 right-angle worm request into a supplier-ready inquiry.
| Field | Why it matters | Example |
|---|---|---|
| Power and speed | Converts the ratio request into input torque, output speed, and heat loss. | 0.40 kW gearbox shaft input, 1500 rpm, 5:1 reduction. |
| Duty profile | Separates intermittent indexing from thermal continuous duty. | 8 hours/day, 20 starts/hour, moderate shock. |
| Mounting and shaft layout | Controls lubrication, seal life, and package fit. | Hollow output, foot mounted, horizontal worm shaft. |
| Holding requirement | Prevents using worm backdrive behavior as an unverified safety brake. | Parking hold only; external brake if safety-rated. |
| Environment | Ambient heat, washdown, dust, and vibration change derating. | 35 C ambient, indoor conveyor, IP54 target. |
Use-case examples
Hypothetical profiles for mapping application language to a decision path; they are not ratings for specific products.
| Scenario | Input profile | Likely path |
|---|---|---|
| Light conveyor turn station | 0.25 to 0.55 kW, 5:1 to 10:1, 8 h/day. | Catalog screen plus mounting and radial-load check. |
| AMR accessory lift or latch | Low speed, intermittent duty, parking hold preference. | Worm may fit, but safety holding needs separate design. |
| Continuous mixer or auger | High duty, heavy shock, warm ambient. | Thermal rating and service factor gate before selection. |
| Battery vehicle drive axis | Runtime-sensitive with frequent starts. | Compare bevel or hypoid efficiency before choosing worm. |
Evidence sources
Traceable inputs used to shape the calculator limits and RFQ guidance.
| Source | Use in this page |
|---|---|
| Gearbox Lubrication and Mounting OrientationsBoston Gear | Boston Gear says some units in worm-under orientation need up to 50% more lubricant than worm-over; verify exact model and mounting position. |
| AGMA 6034-C21 / Thermal RatingsAmerican Gear Manufacturers Association | Its published scope covers rating, thermal capacity, service-factor selection, lubrication, and self-locking for specified cylindrical wormgear reducers; it does not provide a universal oil-temperature cap on this page. |
| Thermal rating guidanceSEW-Eurodrive | For its X..e helical/bevel-helical units (not wormgear rating data), SEW says thermal rating must be checked per unit and exact conditions need manufacturer review. |
| NORD angled gear unit comparisonNORD Drivesystems | Explains sliding-contact trade-offs, higher-ratio efficiency loss, and why duty/load conditions affect architecture choice. |
Internal resources
Related canonical pages for adjacent intent, not duplicate alias pages.
80:1 right angle worm gearbox calculator
Estimate speed, running torque and heat at 80:1 with explicit efficiency assumptions and downloadable results.
worm gearbox ratio and thermal checker
Use when the question is worm gearbox first and does not require a right-angle-specific decision path.
90 degree bevel gearbox comparison
Use when high efficiency or true 90-degree transfer is more important than worm reduction.
right angle gearbox product families
Use after the checker confirms the architecture and you need product-family context.
worm gearbox product family
Use when the right-angle requirement still needs broader worm gearbox product options.
gearbox efficiency comparison resource
Use when heat loss or battery life may outweigh the compact worm layout.
Frequently asked questions
Canonical answers for 5:1 right-angle worm gearbox and adjacent sizing questions.
Ready to convert the screen into an RFQ?
Send the ratio, motor power, input speed, duty profile, mounting position, shaft load, environment, and holding requirement. Mention any boundary result from the checker.