RD8 Napkin tools for mechanical engineers - Free to use

Often the most important decisions and estimates is made on the back of napkin. Napkin Tools is set of early stage tools and calculators intended for early concept stage calculations - so to speak - that can be made on the back of a napkin.

Contact and Clearance Calculator

Laptop displaying a software interface showing a list of mechanical tolerances with status indicators and a 3D model of a mechanical component on the right.

Make quick and rough estimates for tolerance stacks.

See our contact and clearance calculator

2D Drawing Analyzer - Data Extractor

Scan your 2D drawings, extract data and analyze with AI.

See our 2D Drawing Data Extractor

2D Drawing Analyzer - Formatting Checker

Scan your 2D drawings, check for drawing format best practices.

See our 2D Drawing Format Checker

RD8 Product Specification Tool

Manage product specification and action points. Link your user needs to functional calculations (e.g. from RD8 Software).

See our Product Specification Tool

Guide Ratio Calculator

Quick estimates for guide ratio and optimal slider design.

Ensure that energy is not lost to friction and that your design is operating with maximum efficiency.

See our Guide Ratio Calculator