Tool of choice for tolerance calculations 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 new Tolerance 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.
We work with the best companies
Tolerances made Easy
All-in one place, linked to 3D model, integrated calculations, documentation and pass/fail criteria.
All in one place
• Calculations
• 3D model
• Documentation
All in one place
• Calculations
• 3D model
• Documentation
All in one place
• Calculations
• 3D model
• Documentation
Complete all-in-one Tolerance Analysis software
All features
Video: How RD8 finds critical tolerance paths and helps solve the problem
Why RD8 Is Better Than Alternative Tolerance 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 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 stacks. 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- And Painfully Outdated"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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