LED Light

Step 12 Lamp - Aluminium Tube

• Use a digital calliper to accurately measure the diameter of the tube (i know its standard Ø38mm tube but the kids do not)
• Place the tube in a V-Block and place on a flat surface like a marking out plate
• Using a height gauge to measure the overall height of the tube + block (this measurement = X)
• Take the tube diameter measured in the last step and divide by two to get the radius (this = r)
• Do the sum X-r = Centre of tube  (my sum was 48-12.5 = 35.5mm) set the height gauge to this height and scribe the centre line of the tube