Finally, a Tolerance Tool Built for Engineers - Not Just Specialists
Say goodbye to Excel chaos, PowerPoint screenshots, and messy handovers. RD8's new Tolerance Tool is fast, collaborative, and easy to use - powered by geometric insights from your 3D CAD.

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- and painfully outdated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."
What Makes RD8 Different?
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
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.
Truly Collaborative
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.

We work with the best companies















Every feature comes from years of refinement, real projects, and frustrated engineers.
Built From Real Engineering Pain
Ready to Try?
Try It Now - It’s Free, Fast, and Made for Engineers
Want to benefit from Robust Design?
Have a question, need support, or want to collaborate? Reach out and we’ll get back to you as soon as possible.
