What you enter
- Rated output torque
- Required output speed
- Optional package and joint-feature constraints
Robot Joint Sizing Tool
Size and compare robot joint modules for your application.
Enter rated torque and required output speed. Add optional package and joint-feature constraints to compare matching modules, visible performance margins and review flags before quotation.
- Two required inputs to start
- No account required for initial matches
- Engineering confirmation before quotation
Illustrative integrated joint architecture — not a product drawing, not to scale and not a representation of a specific supplier BOM.
How Joint Sizing Works
- 1Enter torque and speedStart with rated output torque and required output speed—the two inputs needed to generate initial matches.
- 2Refine the matchAdd optional peak torque, package limits, reducer, brake, encoder, sensing and communication requirements.
- 3Compare joint modulesReview matching modules, measurable margins and conditions that still require engineering confirmation.
Select a candidate and request joint engineering review when you are ready to proceed.
What the Tool Does
What the tool compares
- Joint performance
- Package fit
- Available reducer, brake, sensing and interface options
What you receive
- Candidate joint modules
- Visible torque, speed and package margins
- Joint-specific review flags and next steps
Example Requirement
See how one requirement becomes a shortlist.
- Rated torque
- 20 N·m
- Peak torque
- 30 N·m
- Required speed
- 120 rpm
- Maximum outer diameter
- 80 mm
- Brake
- No preference
- Reducer
- No preference
Example requirementJoint database screening3 candidate modules
Illustrative output
Example Joint Matches
Illustrative example. Actual matches depend on submitted requirements, indexed data and engineering review.
Candidate A
Indexed Joint Module
- Rated torque margin
- +22%
- Peak torque margin
- +30%
- Speed margin
- +15%
- Outer diameter
- 78 mm
- Mass
- 1.35 kg
Meets the example torque, speed and package requirements with balanced margins.
Candidate B
Indexed Joint Module
- Rated torque margin
- +35%
- Peak torque margin
- +42%
- Speed margin
- +8%
- Outer diameter
- 79 mm
- Mass
- 1.62 kg
Provides higher torque reserve while remaining within the example package limit.
Candidate C
Near Match
- Rated torque margin
- +28%
- Peak torque margin
- +25%
- Speed margin
- +18%
- Outer diameter
- 83 mm
- Mass
- 1.28 kg
Outer diameter exceeds the example hard limit by 3 mm. Engineering review is required.
Joint requirements
Define the requirements you know.
Rated torque and required output speed are required. Every other field is optional and can be left open.
Refine the Match with optional package and integration limits.
Ready to screen
Your sizing requirements
Complete rated torque and required speed to find matching joint modules.
Changes are saved in this browser.
Required inputs completed: 0 of 2
Optional constraints added: 0
How matches are handled
Indexed Joint Module
A reviewed indexed joint record that meets the selected screening constraints.
Configurable Joint Module
An existing joint platform that may require limited joint-specific option or interface review.
Joint Engineering Review Required
No indexed joint meets every required constraint. Feasibility must be reviewed before quotation.
Joint Engineering Review & Data Boundary
Engineering Review Before Quotation
The tool screens candidate joint modules using the submitted requirements and reviewed public parameters. Engineers confirm application assumptions, interfaces, thermal conditions, documentation and final quotation scope.
Supplier identity, procurement records and internal source data remain private. CAD, STEP and complete drawings are reviewed separately and are not released automatically.
- Candidate results are not final application approval.
- Engineering confirmation is required before quotation.
- Controlled files are reviewed separately.
Joint Sizing FAQ
What information do I need to start?
Rated output torque and required output speed are the only required screening inputs.
Can I get initial matches with only torque and speed?
Yes. Enter those two core requirements first, then add optional constraints only when they are known.
Do I need to know the peak torque?
No. Peak torque is recommended but optional. If it is open, the result records that engineering confirmation is still required.
Can I leave package limits open?
Yes. Add only the diameter, length, bore or mass limits that are true project constraints.
How are joint modules matched?
Recorded joint-module capabilities are screened against required torque, speed, package and joint-feature constraints.
What do the displayed margins mean?
Margins show the measurable reserve between a submitted requirement and a recorded candidate capability. They do not replace application validation.
Does a match confirm final application suitability?
No. Every candidate requires engineering confirmation before quotation, documentation release or final application approval.
Can I see matches before submitting contact details?
Yes. Initial matches are shown without an account or contact form.
What happens when no indexed joint meets every requirement?
The tool shows near matches and offers a joint-specific engineering review without adding other services.
Can a joint platform be adjusted for a different encoder, brake or communication interface?
Some recorded platforms support limited joint-specific option review. Availability is confirmed during engineering review.
Can I request CAD or STEP files?
Yes. CAD, STEP and complete drawings remain controlled and are released only after review when available.
What happens after I request joint engineering review?
The selected candidate, requirements, assumptions and review flags are attached for technical confirmation before quotation.
Start with rated torque and required speed.
Review initial candidates before submitting contact details.