Metalworking wall charts

It’s been to cold for me to work in the shop, so I’ve been spending most of my free time on the computer. One of the projects I’ve been working on is wall charts for the shop. When working on projects, I’m forever running back into the house to look up a speed/feed, or the hole size for a given tap. Hopefully having clearly laid out charts will cut down on the number of trips inside.

I know I’m not the only one who suffers from this problem, so in the spirit of Christmas,  I have uploaded some of the finished charts here in PDF format:

1. drill size chart with decimal & mm equivalent
2. Unified tap hole sizes for thread engagement 0f 50% – 80% in 5% steps
3. Metric tap hole sizes for thread engagement 0f 50% – 80% in 5% steps