The layout is famously logical. Every table and graphic is numbered and cross-referenced with an extensive index, allowing a user to find the specific shear strength of a rivet or the tapping torque for an M12 bolt in under 15 seconds.
| Feature | Symbol | Tolerance Zone | |---------|--------|----------------| | Flatness | ⏥ | Two parallel planes | | Parallelism | ∥ | Zone parallel to datum | | Perpendicularity | ⟂ | Zone 90° to datum | | Position | ⌖ | Cylinder or rectangle | | Concentricity | ◎ | Derived median points | Mechanical and Metal Trades Handbook.pdf
If you are using a PC or tablet, open the PDF on one half of the screen and your CAD software or CAM software on the other. This allows you to type tolerances directly from the table into your work. The layout is famously logical
⚙️ Critical reference tables for steel grades, hardness comparisons, and thermal properties. When you are spec'ing out a new job, having that data at your fingertips prevents costly material mistakes. This allows you to type tolerances directly from
Covers motion, forces (addition and resolution), torque, mechanical work, power, friction, and pressure in liquids and gases.