Zeus Chart

An extremely handy pocket-sized reference booklet designed for the drawing office, toolroom, or workshop. This compact, laminated guide provides essential data for quick consultation during engineering, machining, or workshop tasks. The 28-page revision includes standard drill sizes and decimal equivalents, tapping drills and clearances for metric and imperial threads, BS4500 tolerances, hardness comparisons, and jig boring coordinates for equally spaced holes. It also covers sheet metal bending allowances, Morse tapers, and long tables for sine, cosine, tangents, and cotangents. Produced by Zeus Precision Charts Ltd as a metric revision publication and durable enough for frequent handling in professional environments. The booklet is compatible with standard measurement systems and engineering practices and requires no installation—simply keep it accessible for fast reference.

Features

• 28 laminated pages for durability
• Data on drill sizes and decimal equivalents
• Tapping drills and clearances for metric and imperial threads
• BS4500 tolerances and hardness comparisons
• Jig boring coordinates for evenly spaced holes
• Sheet metal bending allowances and Morse tapers