Micrometer Speeder Knobs

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For Micrometer Measuring Range

40 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

Mitutoyo Speeder Knobs for Outside Micrometers


For Ratchet Thimbles	For Ratchet-Stop Thimbles

Use these bright knobs to color code your micrometers by calibration date, precision, or other criteria. Choose knobs with a thimble type that matches the knob you’re replacing.

	For Mfr. Model No.	Choose a Color		Each
For Ratchet Thimbles



	0" to 4", 0 mm to 100 mm	102-701, 102-702, 102-707, 102-708, 102-711, 102-712, 102-717, 102-718, 293-235-30, 293-236-30, 293-237-30, 293-244-30, 293-245-30, 293-246-30, 293-247-30, 293-334-30, 293-344-30, 293-345-30, 293-346-30, 293-347-30, 293-349-30	Black , Blue , Gray , Green , Red , Yellow	5570N21	00000


	For Ratchet-Stop Thimbles



			0" to 12", 0 mm to 300 mm	—	Black , Blue , Brown , Green , Red , Yellow	5570N11	00000


			0" to 12", 0 mm to 300 mm	—	Gray	5570N18	00000
			12" to 20", 300 mm to 500 mm	—	Gray	5570N19	00000

Starrett Micrometer Heads

Mount 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.

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.

Locknut—Locknuts lock the micrometer’s 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 mm to 13 mm	±0.002 mm	0.01 mm	Flat	0.138"	0.625"	Steel	2"	0.234"	0.236"	—	Starrett	460MB	8578A16	0000000


		Plain Thimble—Nonrotating Spindle



				0" to 0.5"	±0.0001"	0.001"	Flat	0.200"	0.75"	Steel	3 7/16"	0.375"	0.375"	Locknut	Starrett	261L	8578A11	000000


				Ratchet-Stop Thimble—Nonrotating Spindle



						0" to 1"	±0.0001"	0.001"	Flat	0.235"	1.25"	Steel	5 1/2"	0.75"	0.500"	Locknut	Starrett	262RL	8578A12	000000


						Ratchet-Stop Thimble—Rotating Spindle



								0" to 1"	±0.0005"	0.0001"	Flat	0.234"	1.25"	Carbide	4 63/64"	0.75"	0.500"	Locknut	Starrett	T263XRL	8578A71	000000


								0 mm to 13 mm	±0.00125 mm	0.002 mm	Flat	0.203"	0.75"	Carbide	3 25/64"	0.5"	0.375"	Locknut	Starrett	V463MXRL	8578A73	000000

Economy Electronic Micrometer Heads

Mount these micrometer heads in jigs, fixtures, machine tools, movable tables, and other equipment that require precise adjustments. The friction thimble will turn with resistance as soon as the the spindle touches the object you're measuring, which helps you avoid overtightening. These heads 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.

The LCD display makes results easy to read. They have zero-position memory, also called absolute positioning (ABS), which keeps the micrometer in the same position after it is turned off. These micrometers have a zero-set button to start measuring at any point along the spindle, like pressing a tare button on a scale.

				Spindle					Mounting Hub
	Distance Measured Range	Accuracy	Measuring Increments	Tip Shape	Dia.	Lg.	Face Material	Overall Lg.	Lg.	Dia.	Batteries Included	Features		Each
Friction Thimble—Rotating Spindle



		0" to 1" 0 mm to 25.4 mm	±0.00012" ±0.003 mm	0.00005" 0.001 mm	Flat	0.255"	1.27"	Carbide	5 1/4"	0.69"	0.472"	Yes	Zero-Position Memory (ABS), Zero-Set Button	5526N11	000000

Accessories for Micrometer Heads

SPC Cords

Send measurements from your micrometer head to your computer using a cord for measuring tool data processors.

USB Connection Type	Lg.	Measuring Tool Connection Type		Each
USB-A	60"	Micro USB-AB	5526N12	0000000

			Pkg.
Replacement Battery	1	7701K34	00000	00000	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

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 Electronic Micrometer Heads with Calibration Certificate


350 Models	164 Model

These micrometer heads come with a calibration certificate traceable to NIST that states they've passed a test for accuracy. For easier reading than other micrometer heads, these show measurements on an LCD. Mount them 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.

Zero-position memory, also known as absolute (ABS) positioning, retains the measuring position when the micrometer is turned off. A zero-set button lets you start measuring at any point. SPC data output allows for connection to a computer or data processor.

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.

Flat Spindle Tip—Flat spindle tips are often used in measurement applications and for bearing against round surfaces.

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.

	Accuracy	Measuring Increments	Spindle Lg.	Overall Lg.	Batteries Included	Electrical Connection	Features	Mfr. Model No.		Each
Ratchet-Stop Thimble—Rotating Spindle with Flat Spindle Tip



	0" to 1" 0 mm to 25.4 mm	±0.0001" ±0.0025 mm	0.00005" 0.001 mm	1.06"	6 5/32"	Yes	Mitutoyo Data Out Switch B	Clamp Nut, Zero-Position Memory (ABS), Zero-Set Button	350-352-32	8283A46	0000000


	0" to 1" 0 mm to 25.4 mm	±0.0001" ±0.0025 mm	0.00005" 0.001 mm	1.06"	6 5/32"	Yes	Mitutoyo Data Out Switch B	Zero-Position Memory (ABS), Zero-Set Button	350-351-32	8283A45	000000


	Ratchet-Stop Thimble—Rotating Spindle with Round Spindle Tip



			0" to 1" 0 mm to 25.4 mm	±0.0001" ±0.0025 mm	0.00005" 0.001 mm	1.06"	6 5/32"	Yes	Mitutoyo Data Out Switch B	Clamp Nut, Zero-Position Memory (ABS), Zero-Set Button	350-354-32	8283A47	000000


			Plain Thimble—Nonrotating Spindle with Flat Spindle Tip



					0" to 2" 0 mm to 50.8 mm	±0.00015" ±0.003 mm	0.00005" 0.001 mm	2"	6 11/16"	Yes	Mitutoyo Data Out Switch C	Rotating Display, Zero-Position Memory (ABS), Zero-Set Button	164-164	19705A11	00000000

Accessories for Micrometer Heads

Mitutoyo Cords

10-Pin Mitutoyo Connector—10-pin data cables connect the micrometer to a Mitutoyo miniprocessor or multiplexer.

USB-A Connection—USB-A data cable connects the micrometer head directly to your PC.

Data Processor Connection Type	USB Connection Type	Lg.	Measuring Tool Connection Type		Each
—	USB-A	80"	Mitutoyo Data Out Switch B	2429N2	0000000
—	USB-A	80"	Mitutoyo Data Out Switch C	2429N3	000000
10-Pin Mitutoyo Connector	—	40"	Mitutoyo Data Out Switch B	20395A83	000000
10-Pin Mitutoyo Connector	—	40"	Mitutoyo Data Out Switch C	20395A7	00000
10-Pin Mitutoyo Connector	—	80"	Mitutoyo Data Out Switch B	20395A84	000000
10-Pin Mitutoyo Connector	—	80"	Mitutoyo Data Out Switch C	20395A75	00000

SPC Wireless Transmitters

SPC wireless transmitters allow you to transmit measurement data from the micrometer to your PC without being tethered by a cable.

Lg.	Electrical Connection		Each
1 3/4"	Mitutoyo Data Out Switch B	2424N2	0000000
1 3/4"	Mitutoyo Data Out Switch C	2424N3	000000

Lg.		Each
5 1/2"	2412N1	0000000

		Each
303, 357, D357, EPX76, RW22/42, SP303, SP357, SR44, SR44SW, SR44W, V76PX, V303, V357, WS14/D303	7604K117	00000	00000	00000

Mitutoyo Electronic Micrometer Heads


350 Models	164 Model

For easier reading than other micrometer heads, these show measurements on an LCD. Mount them 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.

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.

Flat Spindle Tip—Flat spindle tips are often used in measurement applications and for bearing against round surfaces.

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.

	Accuracy	Measuring Increments	Spindle Lg.	Overall Lg.	Batteries Included	Electrical Connection	Features	Mfr. Model No.		Each
Ratchet-Stop Thimble—Rotating Spindle with Flat Spindle Tip



	0" to 1" 0 mm to 25.4 mm	±0.0001" ±0.0025 mm	0.00005" 0.001 mm	1.06"	6 5/32"	Yes	Mitutoyo Data Out Switch B	Clamp Nut, Zero-Position Memory (ABS), Zero-Set Button	350-352-32	8283A22	0000000


	0" to 1" 0 mm to 25.4 mm	±0.0001" ±0.0025 mm	0.00005" 0.001 mm	1.06"	6 5/32"	Yes	Mitutoyo Data Out Switch B	Zero-Position Memory (ABS), Zero-Set Button	350-351-32	8283A21	000000


	Ratchet-Stop Thimble—Rotating Spindle with Round Spindle Tip



			0" to 1" 0 mm to 25.4 mm	±0.0001" ±0.0025 mm	0.00005" 0.001 mm	1.06"	6 5/32"	Yes	Mitutoyo Data Out Switch B	Clamp Nut, Zero-Position Memory (ABS), Zero-Set Button	350-354-32	8283A23	000000


			Plain Thimble—Nonrotating Spindle with Flat Spindle Tip



					0" to 2" 0 mm to 50.8 mm	±0.00015" ±0.003 mm	0.00005" 0.001 mm	2"	6 11/16"	Yes	Mitutoyo Data Out Switch C	Rotating Display, Zero-Position Memory (ABS), Zero-Set Button	164-164	19705A91	00000000

Accessories for Micrometer Heads

Mitutoyo Cords

10-Pin Mitutoyo Connector—10-pin data cables connect the micrometer to a Mitutoyo miniprocessor or multiplexer.

USB-A Connection—USB-A data cable connects the micrometer head directly to your PC.

Data Processor Connection Type	USB Connection Type	Lg.	Measuring Tool Connection Type		Each
—	USB-A	80"	Mitutoyo Data Out Switch B	2429N2	0000000
—	USB-A	80"	Mitutoyo Data Out Switch C	2429N3	000000
10-Pin Mitutoyo Connector	—	40"	Mitutoyo Data Out Switch B	20395A83	000000
10-Pin Mitutoyo Connector	—	40"	Mitutoyo Data Out Switch C	20395A7	00000
10-Pin Mitutoyo Connector	—	80"	Mitutoyo Data Out Switch B	20395A84	000000
10-Pin Mitutoyo Connector	—	80"	Mitutoyo Data Out Switch C	20395A75	00000

SPC Wireless Transmitters

SPC wireless transmitters allow you to transmit measurement data from the micrometer to your PC without being tethered by a cable.

Lg.	Electrical Connection		Each
1 3/4"	Mitutoyo Data Out Switch B	2424N2	0000000
1 3/4"	Mitutoyo Data Out Switch C	2424N3	000000

			Pkg.
	Pkg. Qty.		1-9	10-49	50-Up
Replacement Battery	1	7701K34	00000	00000	00000

		Each
Mfr. Equiv. No.		1-9	10-49	50-Up
303, 357, D357, EPX76, RW22/42, SP303, SP357, SR44, SR44SW, SR44W, V76PX, V303, V357, WS14/D303	7604K117	00000	00000	00000