Effective Tolerance Analysis and Interface Design
We help mechanical designers solve problems and build must-not-fail products with confidence.
Say goodbye to Excel chaos, PowerPoint screenshots, and messy handovers. RD8's Tolerance Analysis Tool is fast, collaborative, and easy to use. Stay in control - automate tedious and tricky task to gain speed and quality. Make sure your calculations are always up to date.
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Complete all-in-one Tolerance Analysis software
All features
We work with the best companies
Tolerance Analysis Made Easy
All-in-one place: 3D CAD model, integrated calculation sheets, stack-up drawings and pass/fail criteria.
All-in-One Tool
Tolerance Stack-up Overview
Smart Calculations Sheets
The Engineer in Control
Part List
The part list summarizes all parameters linked to a part. The foundation for starting the 2D drawing documentation.
Parameter List
Giving the ultimate control of your design.
Setting Up a Tolerance Stack-up
Easy Tolerancing and Setup
Setup an tolerance stack-up in minutes.
Automatic stack-up detection
Get instant help to setup tricky tolerance stack-ups and check if chains are unambigious.
2D Canvas and Annotation
Forecasting success or failure
Easy switch between different evaluation methods:
"What If" simulations
Draft your changes before publishing.
Preview Impact of Parameter Change
Easily preview the impact of publishing your parameter changes
"What if" this parameter changes? Instantly check the impact on other calculations.
Automated Tolerance Stack-up Detection and Setup
A few clicks, and your tolerance chain is setup and checked for ambiguities.
If your tolerance chain is ambiguous it is PhD project to set it up correctly and the changes that it fits reality is low. Increase your quality by securing ideal tolerance chains. The RD8 pathfinder is your assistant to auto-dectect tolerance stack-ups and be the quality control for design clarity.
Built on Interface Analysis
Our technology is built on world-leading interface engine.
Below you see an illustration of two parts - a grey and a purple.
Our 'X-ray' mode lets you inspect functional surfaces between the parts.
In this case almost all functional surfaces are highlighted in orange - indicating overconstraints.
Ideal Interface Design
Contrary to the other example with an overconstrained design - here's an example with no overconstraints.
Our 'X-ray' and constraint evaluation engine determine that there are no overcontraints and that the part is ideally constrained - indicated by green functional surfaces. The parts are exact constrained.
Always Up To Date
Tolerance Calculations are always up to date - synced with CAD model and a global parameter list.
Live Collaboration
Collaborate real-time with colleagues and control access rights.
Define owner, collaborator and viewer rights.
Time-Machine
Create iterations along the development. Track development over time and track history.
Why RD8 Is Better Than Other Tolerance Analysis Tools?
The RD8 Software helps you review and optimize tolerances in your assembly to make it resistant to variation.
Use the tool to guide design decisions early on before 3D, and utilize automated features to identify critical areas in your interfaces.
Easy-to-Use for Advanced Tolerance Calculations and Complex Products
No need for expert training - get started in minutes.
Drag-and-drop interface, automated path finding, 2D sketch-mode, no setup required to get started.
Built for Engineers, Not Analysts
From individual engineers to full R&D orgs - RD8 works across.
Use your own STEP files. Understand results and influence of parameters instantly. No need to be a tolerance wizard.
Live Parameter and Analysis Collaboration Across Teams
Complete tolerance loops 10x faster than with Excel, PowerPoint and traditional CAD.
Work in real time with colleagues. Share stack-ups. Review results and impact across product. No more stale spreadsheets.
"Tolerances Are Critical
- And Painfully Outdated"
Most engineers still juggle Excel, 2D drawings, and emails to make high-stakes tolerance decisions for their products.
"You change one value in Excel, and suddenly everything breaks. It takes 3 hours just to validate a simple change."
"It’s like duct-taping a workflow together from six different tools. None of them talk to each other."
"If someone tweaks a nominal in CAD, we often don’t know until a test fails. There's no traceability."
"It’s hard to explain tolerance impact when there’s no way to see it. Stakeholders just don’t get it."
"You change one value in Excel, and suddenly everything breaks. It takes 3 hours just to validate a simple change."
"It’s like duct-taping a workflow together from six different tools. None of them talk to each other."
"If someone tweaks a nominal in CAD, we often don’t know until a test fails. There's no traceability."
"It’s hard to explain tolerance impact when there’s no way to see it. Stakeholders just don’t get it."
Every feature comes from years of refinement, real projects, and frustrated engineers.
Built From Real Engineering Pain
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By submitting, you accept RD8's Privacy Policy and Terms of Service.