Inside micrometer

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Micrometers, often called “mics”, are likely to be the most utilized precision measuring instrument in any machine shop. As they typically measure in .0001” increments (or .01mm for metric models), micrometers provide extremely accurate measurements and machinists often prefer them to other devices such as calipers. Anatomy Image credit: megadepot.com As you can see in the image above, a traditional micrometer is generally composed of several different parts. Here are some important things to consider when choosing a micrometer: • ANVIL: Together with the spindle, the anvil is the part that will be in constantly in contact with the part and therefore the most likely to chip. For this reason, good models usually feature a carbide-tipped anvil that will allow for longer tool life. • FRAME: Frames come in a number of different sizes and shapes. Some shapes are designed for specific uses. The hub micrometer in the image below, for example, is designed to get into really small areas. When choosing a micrometer, always consider the type of part you are going to measure. • LOCK NUT: A spindle lock is handy to keep track of a measurement and also to lock the spindle for small lot gaging. Some micrometers have a lock nut (as shown), whilst others may have a locking lever. We recommend choosing the lever type as it seems to require less attention over the years and it’s easier to operate • SLEEVE SCALES: While all micrometers feature the main index scale on the sleeve, which measure...

• Inch-reading Combination Head with Setting Master For 128 (1) • Inside Micrometer Caliper (4) • Inside Micrometer Set (18) • Internal Groove Micrometer (2) • Long Range Tubular Inside Micrometer (3) • Micrometer Head for 823MA and 823MB (1) • Micrometer Head Only For 823A, 823B (1) • Micrometer Head Only For 823C, 823D, 823E (1) • Micrometer Head Only For 823MC, 823MD, 823ME (1) • Micrometer Head, 1" For 124C, 124D (1) • Micrometer Head, 1/2" For 124A, 124B (1) • Micrometer Head, 12mm For 124MA, 124MB (1) • Tubular Inside Micrometer (6) • Tubular Inside Micrometer Set (1) • With 1 Graduated Measuring Rod (1) • With 2 Graduated Measuring Rods and 1 Extension Rod (1) • 4 (4) • 5 Rods and Handle (1) • With 3 Graduated Measuring Rods and 2 Extension Rod (1) • 6 (4) • 7 (1) • 8 Rods and Handle (1) • 8 (1) • 10 Rods and Handle (1) • 10 (5) • 11 Insulated rods (1) • With (1) 4-6" Head, (1) each 2", 4", 6", 8", 10", 12" Rods, (1) 12" Ext., (5) 24" Ext. (1) • With (1) 4-6" Head, (1) each 2", 4", 6", 8", 10", 12" Rods, (1) 12" Ext., (2) 24" Ext. (1) --itemid: 1121640 --listprice: 0 --promoprice: -1 --uom: Ea --webprice: -1 --webstatus: UNPUBLISHED a0105101Title: Inside Micrometers a0105201Description01: Electronic and Mechanical inside micrometers measure internal dimensions like internal diameters in 1" increments to 0.0001" accuracy and 50 millionths (0.00005") resolution. a0106201Description01: Electronic and Mechanical inside micrometers measure internal dimensions like intern...

The Starrett 124 Solid -Rod Inside Micrometer Sets are the most popular inside micrometers because of their lightness, ease of use, and range. They are very useful for measuring inside diameters of cylinders and rings and measuring parallel surfaces. The desired range is obtained by assembling rods and spacing collars to the micrometer head. Measuring rods are provided with a shoulder that is set accurately in the micrometer head and locked in position. When assembling rods to the A and B heads, the reading line on the micrometer head should be lined up with the marking on each rod (except for the 2-3" and the 50-75mm rods). Rod diameters are approximately 1/4" (6mm) on the A and B sizes, and approximately 11/32" (8.5mm) on the C size. Each rod has individual length adjustment for the anvil by means of special wrenches furnished. 2-32" Range, .001" Grad, 124A/124C Rods with Case. Member of Kit Item # Description Part No. Qty Information 1 MICROMETER, INSIDE 1 2 •MICROMETER HEAD 0 3 ••NUT, .375-52 1 4 ••BODY,ENGLISH #124A B 1 5 •••SHORT HANDLE 1 6 •••LOCK SCREW 1 7 ••SHELL, OUTSIDE 1 8 ••SPINDLE SCR, .297-40 1 9 ••CAP, SHELL 1 10 •COLLAR, SMALL 1 11 •ROD, 2-3" 1 12 •ROD, 3-4" 1 13 •ROD, 4-5" 1 14 •ROD, 5-6" 1 15 •ROD, 6-7" 1 16 •ROD, 7-8" 1 17 INSIDE MICROMETER 8-32" RANGE 1 18 •MICROMETER HEAD, 1" RANGE, .001" GRAD 1 19 ••BODY,ENGLISH #124C 1 20 ••NUT, .375-52 1 21 ••SHELL, OUTSIDE-ENG. 1 22 ••SHELL, ADJ...

Member of Kit Item # Description Part No. Qty Information 1 MICROMETER HEAD 1 2 •BODY #823A 1 3 •SHELL, ADJUSTING ENGLISH 1 4 •SHOE, NYLON 1 5 •SHELL, OUTSIDE 1 6 •SPIND SCR, .225-40, ENGLISH 1 7 •NUT, .312-60 ADJUSTING 1 8 •SCREW, .125-40 SLOT X .250 LONG 1 9 •DISC, ACETATE CRYSTAL 1 10 •CAP, END 2 11 MICROMETER HEAD 1 12 •STEM SUB ASSEMBLY 1 13 •SPRING, BARREL 1 14 •NUT, .375-52 1 15 •SHELL, ADJUSTING 1 16 •SHELL 1 17 •SPINDLE 1 18 •SCREW, .157-40 SLOT X .520 LONG 1 19 •RING, BINDER 1 20 •PIN,.123X.155X.131 1 21 •SPRING, .132X.156X.094X.012X2 -1/2 1 22 •CAP, END 2 23 ROD SUB ASSEM, 1/2" 1 24 ROD SUB ASSEMBLY 1" 1 25 ROD SUB ASSEM,1 1/2" 1 26 ROD SUB ASSEMBLY 2" 1 27 ROD SUB ASSEMBLY 4" 1 28 ROD SUB ASSEMBLY 7" 1 29 ROD SUB ASSEMBLY 10" PT09948-10 1 30 ROD SUB ASSEMBLY 12" 1 31 ROD SUB ASSEMBLY 13" 1 32 ROD SUB ASSEMBLY 14" PT09948-14 1 33 HANDLE ONLY FOR 823 SERIES 1 34 •BODY,HANDLE S.A.#823 1 35 •HANDLE, .157-40 ADJ. 1 36 •CLOSER, HANDLE JAW 1 37 •JAW, HANDLE #823 2 38 •SPRING, JAW 1 39 •PIN, .125X.413 1 40 WRENCH #232 1/2 1 41 WRENCH #3 1 42 CASE ONLY, WOOD 1 NOT SHOWN