Dial Micrometers | McMaster-Carr

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16 Products

Mitutoyo Micrometer Heads


Ratchet-Stop Thimble	Plain Thimble

Use these micrometer heads in jigs, fixtures, machine tools, movable tables, and other equipment that require precise adjustments. They are held in place by the cylindrical mounting hub using your existing brackets or fixtures. Spindle length is the maximum extended distance when the micrometer head is set at zero.

Ratchet-Stop Thimble—Ratchet-stop thimbles have a constant-force mechanism to ensure repeatable measurements without relying on operator feel. They also have a speeder knob to reduce the time it takes to move the spindle. Once the spindle contacts the surface of the measured object, it will stop tightening, but the speeder knob will continue turning with a clicking sound.

Plain Thimble—Plain thimbles turn freely without friction or a stopping device and rely on operator feel for accurate measurements.

Nonrotating Spindle—Nonrotating spindles prevent scratches on delicate work surfaces and eliminate distortion of soft or elastic material.

Round Spindle Tip—Round spindle tips minimize errors from misalignment, so they’re often used as feed devices.

Clamp Nut—Clamp nuts securely hold the micrometer head and provide extra support.

Locknuts—Locknuts lock the spindle in place.

				Spindle					Mounting Hub
	Distance Measured Range	Accuracy	Measuring Increments	Tip Shape	Dia.	Lg.	Face Material	Overall Lg.	Lg.	Dia.	Features	Mfr.	Mfr. Model No.		Each
Plain Thimble—Rotating Spindle



		0" to 0.5"	±0.0001"	0.001"	Flat	0.197"	0.61"	Steel	2 13/16"	0.375"	0.375"	Clamp Nut, Locknuts	Mitutoyo	148-502	19725A62	000000


		0" to 0.5"	±0.0001"	0.001"	Round	0.197"	0.61"	Steel	2 13/16"	0.375"	0.375"	Clamp Nut, Locknuts	Mitutoyo	148-852	19725A11	00000
		0 mm to 13 mm	±0.002 mm	0.01 mm	Flat	0.197"	0.61"	Steel	2 13/16"	0.375"	0.375"	Clamp Nut, Locknuts	Mitutoyo	148-504	19725A12	00000


		Plain Thimble—Nonrotating Spindle



				0" to 1"	±0.00015"	0.001"	Flat	0.315"	1.063"	Carbide	4 1/4"	0.394"	0.500"	—	Mitutoyo	153-207	19725A14	000000


				0" to 2"	±0.0002"	0.0002"	Flat	0.315"	2.559"	Carbide	5 5/8"	0.551"	0.709"	—	Mitutoyo	197-201	19725A15	000000


				Ratchet-Stop Thimble—Rotating Spindle



						0" to 1"	±0.0001"	0.001"	Flat	0.250"	1.063"	Carbide	4 3/4"	0.591"	0.375"	Clamp Nut, Locknuts	Mitutoyo	150-214	19725A13	00000

Precision-Adjust Micrometer Heads

For near perfect positioning, the spindle on these micrometer heads moves in smaller increments than the spindle on any other micrometer head we offer. Mount them in equipment requiring extremely precise adjustments, such as positioning tables used in semiconductor manufacturing or in optical component alignment. They are held in place by the cylindrical mounting hub using your existing brackets or fixtures. For a tight hold and extra support, secure the clamp nut against the bracket or fixture on the mounting hub.

Spindle length is the maximum extended distance when the micrometer head is set at zero.

Plain Thimble—Plain thimbles turn freely without friction or a stopping device and rely on operator feel for accurate measurements.

Round Spindle Tip—Round spindle tips minimize errors from misalignment, so they’re often used as feed devices.

					Spindle					Mounting Hub
	Distance Measured Range, mm	Accuracy	Measuring Increments, mm	Travel Distance per Turn, mm	Tip Shape	Dia.	Lg.	Face Material	Overall Lg.	Lg.	Dia.	Features	Mfr.	Mfr. Model No.		Each
Plain Thimble—Rotating Spindle



		0 to 6.5	±0.002 mm	0.002	0.1	Round	0.197"	0.55"	Steel	2 27/64"	0.375"	0.375"	Clamp Nut	Mitutoyo	148-143-10	6256N13	0000000


		0 to 6.5	±0.002 mm	0.01	0.25	Round	0.250"	0.35"	Steel	1 29/32"	0.375"	0.375"	Clamp Nut	Mitutoyo	148-323-10	6256N12	00000
		0 to 13	±0.002 mm	0.01	0.25	Round	0.197"	0.69"	Steel	2 13/16"	0.375"	0.375"	Clamp Nut	Mitutoyo	148-133-10	6256N11	000000

Outside Micrometers for Tolerance Checking

Dial Display

Confirm parts are within tolerance without twisting the thimble each time. These micrometers don't need batteries, so they're always ready for the job.

Mitutoyo—The go-to for machinists and engineers. Every part is made within a Mitutoyo automated factory and tested in-house in Japan. The spindle glides as you turn the thimble with a weighty, silky-smooth feel.

Dial Display—Know exactly how far your part falls outside of the tolerance range. Push a button to retract the anvil, then slide your part in. Release and the anvil snaps back to its set position. The needle on the dial shows you the difference in measurement.

								Outside Micrometers
	Measuring Range	Accuracy	Measuring Increments	Thimble Type	Throat Dp.	Frame Material	Mfr. Model No.		Each
Mitutoyo







				With Dial Display

				0" to 1"	±0.00005"	0.00005"	Plain	0.984"	Steel	523-131	6306N11	0000000


				1" to 2"	±0.00005"	0.00005"	Plain	1.378"	Steel	523-132	6306N12	00000000

Leveling Micrometer Heads

Precisely level heavy machines, surface plates, and other devices when accuracy is crucial. Turn the handle to adjust their height, even when under a machine.

Plain Thimble—Plain thimbles turn freely without friction or a stopping device and rely on operator feel for accurate measurements.

						Overall
	Distance Measured Range, mm	Measuring Increments, mm	Point Angle	Spindle Face Material	Wt. Cap., lb.	Wd.	Ht.	Base Dia.	Handle Lg.	Features	Mfr.	Mfr. Model No.		Each
Plain Thimble—Rotating Spindle



		60 to 75	0.01	90°	Steel	850	4 19/32"	2 3/8"	2 17/32"	3 11/32"	Handle	Mitutoyo	7850	8614N11	0000000

Mitutoyo Dial Depth Gauges

Check depth measurements at a glance. These gauges have a dial that displays how far their blade extends into slots, holes, and grooves. Designed for frequent use, they’re often found in machine shops and other areas where digital measurements and data transfer aren’t required.

			Measuring Blade			Base
Distance Measured	Accuracy	Measuring Increments	Tip Wd.	Wd.	Material	Wd.	Lg.	Material	Overall Ht.	Measurement per Dial Rev.	Dial Face Color	Mfr.	Mfr. Model No.		Each



	0" to 6"	±0.001"	0.001"	0.16"	0.43"	Stainless Steel	4"	11/16"	Stainless Steel	10 1/4"	0.2"	White	Mitutoyo	527-311-50	2105A41	0000000


	0" to 12"	±0.0015"	0.001"	0.16"	0.43"	Stainless Steel	4"	11/16"	Stainless Steel	16 1/8"	0.2"	White	Mitutoyo	527-313-50	2105A42	000000

Base Extensions

7" Base Extension—Base extensions increase the base width of your depth gauge to measure large-diameter holes.

12" Base Extension—Base extensions increase the base width of your depth gauge to measure large-diameter holes.

		Each
7" Base Extension	2105A66	000000
12" Base Extension	2105A68	00000