Post on 04-Jan-2016
description
Forging new generations of engineers
The English System of Measurement
How precise do I need to be?• We need to be able to accurately measure
to the .001th
.125
Decimal to Fraction Conversions
• .125 = 1/8”• .250 = 1/4”• .375 = 3/8”• .500 = 1/2”• .625 = 5/8”• .750 = 3/4”• .875 = 7/8”• 1. = 1”
• .0625 = 1/16”• .1875 = 3/16”• .3125 = 5/16”• .4375 = 7/16”• .5625 = 9/16”• .6875 = 11/16”• .8125 = 13/16”• .9375 = 15/16”
Tools used in Precision Measurement
• Gage Blocks: These are used throughout industry as primary standards and have accuracy to a few millionths of an inch.
Gage Blocks
Micrometers
Sleeve
ThimbleRatchet Stop
Dial Caliper
Dial Indicators