| Process | Ra (µm) | Application | |---------|---------|-------------| | Saw cut | 12.5 – 25 | structural | | Rough turning | 3.2 – 6.3 | clearance | | Finish turning | 0.8 – 1.6 | bearing fits | | Grinding | 0.2 – 0.4 | precision sliding | | Lapping | 0.025 – 0.05 | gage surfaces |
| Steel | Austenitizing (°C) | Quench | Temper (°C) | |-------|---------------------|--------|--------------| | 1045 | 820 – 850 | Water/oil | 400 – 600 | | 4140 | 845 – 870 | Oil | 540 – 680 | | O1 tool steel | 790 – 815 | Oil | 175 – 350 | Mechanical and Metal Trades Handbook.pdf
#Metalwork #Machinist #Welding #Fabrication #EngineeringLife #TradeSkills #Blueprints #ShopLife | Process | Ra (µm) | Application |
| Handbook | Strengths | Weakness vs. MET Handbook | | :--- | :--- | :--- | | | Imperial units (inches), bearings, gears. | Weak on DIN/ISO metric standards. | | Metals Handbook (ASM) | Deep metallurgy, phase diagrams. | Too academic; lacks practical machining data. | | Kleppner & Ramsey | Strong on physics/mechanics theory. | No trade-specific tables (fits/tolerances). | | | Metals Handbook (ASM) | Deep metallurgy, phase diagrams
