11 best inside micrometers
Inside micrometers, also known as internal micrometers or bore micrometers, are precision measuring instruments used to measure the internal diameter of holes, cylinders, or other openings. They are a valuable tool in dimensional measurement, quality control, and various industrial and scientific applications.
Here are some key points related to inside micrometers:
Design and Components: Inside micrometers typically consist of a micrometer head, an anvil, a spindle, and a thimble. The anvil is placed inside the bore or hole to be measured, while the spindle is advanced using a ratchet or friction thimble until it makes contact with the opposite wall of the bore. The micrometer head is then read to determine the precise measurement.
Measurement Range: Inside micrometers come in a range of sizes to accommodate different bore diameters. They can measure holes ranging from a few millimeters to several inches or more in diameter. Specialized models are available for even larger diameters.
Accuracy and Precision: Inside micrometers are known for their high accuracy and precision. They can measure dimensions to within thousandths of an inch (or hundredths of a millimeter), making them suitable for applications where extremely precise measurements are required.
Types of Inside Micrometers: There are different types of inside micrometers to suit various needs:
- Mechanical Inside Micrometers: These are manually operated micrometers where the measurement is read directly from a scale on the micrometer head.
- Digital Inside Micrometers: These have a digital readout for quick and easy measurement readings.They may also have data output capabilities for recording measurements electronically.
Applications:
- Quality Control: Inside micrometers are widely used in manufacturing and quality control processes to ensure that machined parts meet specified tolerances.
- Engineering and Machining: Engineers and machinists use inside micrometers to measure the internal dimensions of components, such as engine cylinders, bearings, and pipes.
- Maintenance and Repairs: Inside micrometers are used in maintenance and repair work to assess the wear and tear of mechanical parts and determine if they need replacement.
Care and Maintenance: To maintain accuracy, inside micrometers should be handled carefully and stored properly. Regular calibration and cleaning are essential to ensure their reliability.
Safety: Users should be cautious when handling inside micrometers to avoid damage to the delicate measuring surfaces and to prevent accidents, such as pinching fingers when closing the micrometer.
In summary, inside micrometers are precision instruments used for accurately measuring the internal dimensions of holes, cylinders, and other openings. They play a crucial role in manufacturing, quality control, and various industrial and scientific applications where precise dimensional measurements are necessary.
Below you can find our editor's choice of the best inside micrometers on the market
Fowler 0.2-1.2” Electronic IP54 Inside Micrometer 54-860-275-0, Full One Year Warranty, 0.00020″/.005mm Accuracy
Fowler
Product description
Fowler 54860275 digital (electronic) IP54 inside micrometer with 0.2-1.2” measuring range. The LCD display has a 0.0001" resolution and an accuracy of 0.0002" for precise readings and accurate measurements. Measuring jaws & faces fully hardened & microlapped for accuracy. Each gage includes appropriate setting ring. This inside micrometer is water Resistant to IP54 specifications. It has true inch or metric conversion and direct RS232 output with an easy-to-read LCD display. It has friction-style thimble, which is suitable for one-handed operation and stop turning when the spindle comes into contact with the workpiece, providing constant force for consistent measurements between operators. This product has 1 year warranty offered by Fowler High Precision. If you experience any problem contact Fowler directly for warranty claims. Micrometers are precision measuring instruments that use a calibrated screw to measure distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot.
- Fowler 0.2-1.2” electronic inside micrometer 54-860-275, water Resistant to IP54 specifications
- Full one year warranty offered by Fowler, an American company
- True inch/metric conversion, Direct RS232 output, Large easy-to-read LCD display
- Friction thimble, Each gage includes appropriate setting ring
- Measuring jaws & faces fully hardened & microlapped for accuracy
User questions & answers
| Question: | Why are these listed as blade micrometers when the picture shows inside mics |
| Answer: | Hi, J.Please note that the manufacturer replied that the part number #548602750 is Electronic Blade Micrometer with the electronic micrometer inside.Regards. |
| Question: | is this item measure in mm |
| Answer: | Dear shlomo a., Please note that this item can measure in inches and mm. |
| Question: | Can this model measure inside diameter of <3mm? If not, do you have a model that can fit this requirement |
| Answer: | No, it can not measure 3mm or less. I believe 5.5mm is the smallest it will measure. |
INSIZE 3222-6 Tubular Inside Micrometer, 0.001" Graduation, 2" - 6"
INSIZE
Product description
Tubular inside micrometer, 2-6", graduation 001".
- Accuracy: [.00005(3+N+l/2)]"
- N=number of rods, l=maximum measuring length (inch)
- Supplied with setting standards
- Carbide measuring faces
iGaging Inside Hole Micrometer 0.65-0.80" 16-20mm Inch/Metric Digital Electronic 3-Point Bore Gauge Resolution 0.00005"
iGaging
Product description
iGaging Inside Hole Micrometer 0.65-0.80" 16-20mm Inch/metric Digital Electronic 3-Point Bore Gauge Resolution 0.00005"
Precision made by iGaging
Features:
- SPC Output
- Range: 0.630-0.787"/16-20mm. Resolution: 0.00005" / 0.001mm. Accuracy: 0.00016"
- Carbide measuring surfaces
- Contact points are designed to allow measurments near the bottom of a blind hole
- Setting/Calibration Ring Included
- Friction Thimble.
- Protective Case Included.
- Range: 0.65-0.80"/16-20mm. Resolution: 0.00005" / 0.001mm. Accuracy: 0.00016"
- Carbide measuring surfaces
- Contact points are designed to allow measurments near the bottom of a blind hole
- Setting/Calibration Ring Included
- Friction Thimble. Protective Case Included.
Mitutoyo 137-012 Tubular Vernier Inside Micrometer, Extension Rod Type, 2-2.5" Range, 0.001" Graduation, +/-0.00017" Accuracy
Mitutoyo
Product description
- Tubular micrometer measures the inside dimensions of cylinders, rings, and parallel surfaces
- Vernier scale in inch units for taking precise inside dimension (ID) measurements
- Includes interchangeable extension rods for a diversified range of measurement
- Slow head travel helps provide fine positioning
- Solid extension rods help provide durability
User questions & answers
| Question: | does this come with inspection report |
| Answer: | It’s genie and original |
Starrett 124BZ Solid-Rod Vernier Inside Micrometers Set, 2-12" Range, 0.001" Graduation, +/-0.0001" Accuracy, With Case
Starrett
Product description
Inside Micrometer Set, Rod Type Solid, Resolution 0.001 In., Range 2 to 12 In., Movement of Screw 1/2 In., Number of Measuring Rods 10, Number of Gauges 1, Thimble Plain, SPC Output No, Anvil Curved, Rotating Spindle (Yes/No) Yes, Lock Nut Type -, Rod Dia. 0.25 In., Anvil Material Hardened Steel, Spindle Material Hardened Steel, Features Insulated Rods Marked with Length, Adjustable for length, Measuring Rods are Solid, Quick-Reading Figures, 6-1/2 In. (165mm) Long Handle is Available (124H)
From the Manufacturer
These are the most popular inside micrometers because of their lightness, ease of use, and range.
- Mpn: 124BZ
- Country of manufacture: United States
- Manufacturer: Starrett
User questions & answers
| Question: | Is that an actual picture of the product? I am looking for the set that the knurl on the dial is closer to the middle |
| Answer: | The photo accurately represents the product |
| Question: | where is the tool made |
| Answer: | I cannot give an answer where Starett tools are made, but a I this inside mic and it's top quality. I have ordered a lot of Starett tools over the years and I never had a complaint |
| Question: | Can you provide the Calibration Certificate |
| Answer: | Don't know of a calibrated cert you need a certified outside mic |
Product features
Starrett 124BZ Solid-Rod Vernier Inside Micrometers Set, 2-12" Range, 0.001" Graduation, +/-0.0001" Accuracy, With Case
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.
Shars 0.2-2.2" Precision Inside Micrometer 303-2100 P}
Shars
- Measuring Range: 0.2-2.2"
- Thimble: Rachet
- Accuracy: 0.00024
- Graduation: 0.001
- Satin chrome reading surface finished on barrel and thimble is glare free and resist rust
Mitutoyo 141-233, 2" - 12" X .001" Interchangeable Rod Inside Micrometer
Mitutoyo
Product description
Mitutoyo Interchangeable Rod Inside Micrometer, Graduation: .001", Range: 2 - 12"
- Used to measure a wide range of ID measurements
- Each interchangeable rod is marked with it's measuring range
- Supplied with holding handle
- Clear graduations on satin chrome finish mic head
- Supplied in a fitted plastic case
Accusize Industrial Tools 2-24'' by 0.001'' Resolution Inside Micrometer Set, 3011-5051
Accusize Co., Ltd.
- The combining of extension rods provides a wide measuring range. Supplied with a standard caliper gauge for zero setting.
- Carbide measuring faces. Diameter of extension rods: φ15.5mm. Rod Diameter: 0.61"
- Accuracy: Metric(3+n+L/50)μm, (n=number of rod, L=maximum. Measuring length (mm) [Inch]. Resolution: 0.001"
- Each interchangeable rod is marked with its measuring range. Use to measure 3 flute cutting heads such as end mills, taps and reamers.
- Extension Rods: 0.5", 1", 2", 4", 6", 8". Range: 2-24"
User questions & answers
| Question: | do the mics come with certification |
| Answer: | Thanks for your asking, Henry, this Mic does not come with a NIST certificate. But they were checked by Manufacturer carefully. Thank you. |
| Question: | where is this made |
| Answer: | This product was made in China, good quality. Thanks. |
Product features
Features
- Resolution:0.001"
- Use to measure 3 flute cutting heads such as end mills, taps and reamers.
- Carbide V surfaces.
- Rod diameter: 0.61".
- Each interchangeable rod is marked with its measuring ranges.
- Nice wooden fitted case.
Anytime Tools Tubular Inside Micrometer 2-12" Internal Precision Set
Anytime Tools
Product description
Professional Grade Precision Tool
Extension rod type Inside Micrometers have a wide measuring range—any one single micrometer can replace many bar type inside micrometers.
Features:
- Each set consists of an inside micrometer head and a series of fully hardened and lapped extension rods of different lengths.
- Anvil and spindle are hardened and precision ground with microlap finish on ends.
- Spindle thread hardened, ground & lapped.
- Microfine graduations on satin chrome.
- Positive locking nut on spindle. be calibrated by a micrometer or ring gage.
- Coiled spring pressure contact type rods are each marked with appropriate length.
- Quick, easy zero adjustment on the sleeve.
- Meets or exceeds Federal accuracy specs.
- Reference standard included with set.
- Includes a wrench and a fitted case.
- Range: 2" to 12"
- Graduation: 0.001"
User questions & answers
| Question: | Is this a made in America brand |
| Answer: | made in China |
Starrett 824MA Fixed Range Vernier Inside Micrometer, 75-100mm Range, 0.01mm Graduation, +/-0.002mm Accuracy
Starrett
Product description
- Vernier scale in metric units for taking precise inside dimension (ID) measurements
- Adjustable sleeve and contacts help provide accurate measurements
- Knurled ring-type lock nut to hold measurements in place
- Satin chrome finish helps resist rust and reduce glare
- Heat-insulated handles to help reduce temperature-related expansion or contraction
Shars 0.2-1.2" Precision Inside Micrometer 303-2101 P}
Shars
- Measuring Range: 0.2-1.2"
- Thimble: Rachet
- Accuracy: 0.0002
- Graduation: 0.001
- Satin chrome reading surface finished on barrel and thimble is glare free and resist rust
User questions & answers
| Question: | does this item include a ring gage and a case |
| Answer: | Yes, the setting ring is included in the case |
Latest Reviews
View all
Mens Tank
- Updated: 13.01.2023
- Read reviews
Ear Headphones With Advanced
- Updated: 27.05.2023
- Read reviews
Lp Drawing Tablets
- Updated: 18.04.2023
- Read reviews
Headphone Holder For Class
- Updated: 11.05.2023
- Read reviews
Acoustic Audio Speaker Stands
- Updated: 23.03.2023
- Read reviews