Mohs scale of hardness - extended Material Hardness Plastic 1 Graphite ...
Thursday, 31 May 2012
Mohs scale of hardness - metals
Mohs scale of hardness - metals Metal Hardness Lead 1½ Tin 1...
Friday, 11 May 2012
Comparative weights chart
Comparative weights chart - Copper Sterling Silver 9 ct Gold 14 ct Gold 1...
Birmingham metal gauge conversion chart
Birmingham metal gauge conversion chart BMG mm Inch 1 0.22 0.0085 ...
Thursday, 10 May 2012
Hardness of silver
Silver sheet is usually supplied ½ hard, and will become fully hardened as it is worked using cold forming processes. Silver can be easily a...
Simplified maths for metalwork
Area of a circle = πr² ≈ 3.1416 × radius × radius Circumference of a circle = πd ≈ 3.1416 × diameter Diameter of a circle = c ÷ π ≈ circum...
Wednesday, 9 May 2012
Wire gauge conversion chart
American wire gauge (AWG) The gauge determines the thickness of a wire, and in a geometrical system it may relate to either the diameter or ...
Tuesday, 8 May 2012
Emery paper grades
Emery paper grades FEPA [1] Average particle diameter (µm) Historic British size P2000 9.6 4/0 P1500 12.3 3/0 P1200 15.8...
Tool safety
All tools and workshop machinery are designed for a specific purpose. Misuse of a tool or machine could damage it, and could also cause an i...
Piercing saw blade sizes
Piercing saw blade sizes Blade size Blade thickness (mm) Blade depth (mm) Teeth per mm Recom...
First aid - dust and fumes
If you start to feel dizzy, feint, or drowsy during any process that creates fumes you should stop working immediately. Leave the work area,...
Friday, 4 May 2012
First aid - eye injuries
If you get something stuck in an eye, make sure that your hands are clean before you attempt to touch it. Either inspect the eye in a mirror...
Thursday, 3 May 2012
First aid - burns
In the event of a burn from a torch flame or hot metal, the following treatment should be carried out as soon as possible to limit the amoun...
First aid - calling the emergency services
Always call the emergency services (999 or 112 in the UK) if someone is seriously injured, and their life is at risk. Examples of genuine me...
Wednesday, 2 May 2012
First aid - serious cuts
Try to remain calm and do not panic; taking a few deep, even breaths should help with this. Sit down before inspecting the injury closely, f...
First aid - minor cuts
By their very nature, workshops contain many items that can cause injury. Being prepared for an injury might save a finger, considerable blo...
Tuesday, 1 May 2012
Preventing firestain
Sterling silver will oxidise rapidly when exposed to the high temperatures used in annealing and soldering. Sterling silver is an alloy of s...
Subscribe to:
Posts (Atom)