Bearing Gauges | McMaster-Carr

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System of Measurement

Material

Thickness

Measuring Sizes

Color

Leaf Length

Width

Maximum Thickness Measured

Length

Number of Leaves

End Style

RoHS

Closed Width

Export Control Classification Number (ECCN)

EAR99

Thickness Measuring Increments

0.001"

0.005"

0.05 mm

Maximum Tapered Gauge Thickness Measured

Closed Length

Frame Material

REACH

DFARS Specialty Metals

Exempt

Minimum Thickness Measured

Minimum Tapered Gauge Thickness Measured

1/64"

0.5 mm

Manufacturer Model Number

Tapered Gauge Thickness Measuring Increments

Electrical Wire Size

Widths Included

0.100" to 0.500" (0.001" Increments)

0.500" to 1.000" (0.001" Increments)

1/16" to 1 1/16" (1/64" Increments)

1 mm to 29 mm (0.05 mm Increments)

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30 Products

Plastic Clearance Feeler Gauges


Step 1: Lay Strip Flat	Step 2: Compress Components

Step 3: Match Flattened Strip to Reading Card

Squish these tiny plastic strips between two components to measure the clearance between them. Once compressed, match the widest part of the flattened strip to the markings on the reading card. Each marking on the card corresponds to a different clearance measurement. For large bearings and wide surfaces, use two or more strips to check for inconsistency.

Originally designed to check clearances in automotive bearings, these strips also work with cylinder heads, flanges, and other fitted parts. Although generally less precise than calipers and hole gauges, they take clearance measurements in spots that can't be reached after the part is assembled.

						Small Pack			Large Pack
	Inch Measuring Sizes	Metric Measuring Sizes	Strip Lg.	Reading Card Material	Color	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
Plastic



		—	0.0180 mm, 0.0200 mm, 0.0220 mm, 0.0250 mm, 0.0300 mm, 0.0350 mm, 0.0400 mm, 0.0450 mm	4"	Paper	Gray	10	0000000	000000	100	0000000	000000


		0.0010", 0.0015", 0.0020", 0.0025", 0.0030", 0.0040", 0.0050", 0.0060", 0.0070"	0.0250 mm, 0.0380 mm, 0.0500 mm, 0.0630 mm, 0.0760 mm, 0.1000 mm, 0.1250 mm, 0.1500 mm, 0.1750 mm	4"	Paper	Red	10	0000000	00000	100	0000000	00000
		0.0040", 0.0050", 0.0060", 0.0070", 0.0080", 0.0090", 0.0100"	0.1000 mm, 0.1250 mm, 0.1500 mm, 0.1750 mm, 0.2000 mm, 0.2250 mm, 0.2500 mm	4"	Paper	Blue	10	0000000	00000	100	0000000	00000
		0.0070", 0.0080", 0.0090", 0.0100", 0.0120", 0.0140", 0.0160", 0.0180", 0.0200"	0.1750 mm, 0.2000 mm, 0.2250 mm, 0.2500 mm, 0.3000 mm, 0.3500 mm, 0.4000 mm, 0.4500 mm, 0.5000 mm	4"	Paper	Green	10	0000000	00000	100	0000000	000000
		0.0200", 0.0240", 0.0280", 0.0320", 0.0360", 0.0400"	0.5000 mm, 0.6000 mm, 0.7000 mm, 0.8000 mm, 0.9000 mm, 1.0000 mm	4"	Paper	Brown	5	0000000	00000	30	0000000	00000
		0.0300", 0.0400", 0.0500", 0.0600", 0.0700"	0.7500 mm, 1.0000 mm, 1.2500 mm, 1.5000 mm, 1.7500 mm	4"	Paper	Black	5	0000000	00000	25	0000000	00000

Wire, Width, and Thickness Feeler Gauge Sets

These sets combine a wire gauge, a tapered-width feeler gauge, and a set of feeler gauges for tight spots in one tool. The tapered-width gauge is designed for measuring hole and slot widths and diameters. The feeler gauge leaves check the thickness of slots, gaps, and alignment; each leaf is marked with thickness. Leaves are riveted together in a fan design that folds up for portability.

		Tapered Ga. Thk.				Closed
	Thk.	Measured Range	Measuring Increments	Electrical Wire Size	Leaf Lg.	Lg.	Wd.		Each
Steel



		0.002", 0.003", 0.004", 0.006", 0.008", 0.01", 0.012", 0.015", 0.0625"	1/64" to 3/16"	1/64"	36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 1/16", 1/8"	4 1/2"	4 15/16"	1/2"	00000000	0000000


		0.04 mm, 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.3 mm, 1 mm, 2 mm	0.5 mm to 5 mm	0.5 mm	36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 1/16", 1/8"	4 15/16"	4 15/16"	1/2"	0000000	000000

Tapered-Width Feeler Gauge Sets

Check slot widths and hole diameters with the markings on these gauges. Leaves in a variety of sizes are riveted together in a fan design—spread them out for use or fold them in for portability. Each leaf narrows toward the tip to measure a range of sizes. Slide them into a hole until the gauge sits snug and then read the width measurement.

Steel—Steel gauges are stronger, harder, and more wear resistant than stainless steel gauges.

Stainless Steel—Stainless steel gauges are less likely to rust than steel gauges.

				Closed
	No. of Leaves	Widths Included	Leaf Lg.	Lg.	Wd.	Mfr.	Mfr. Model No.		Each
Steel



		4	1/16" to 1 1/16" (1/64" Increments)	5 7/32"	5 1/4"	1"	Starrett	267	0000000	0000000


		8	0.100" to 0.500" (0.001" Increments)	2 17/32"	2 17/32"	1/2"	Starrett	269A	0000000	000000
		10	0.500" to 1.000" (0.001" Increments)	2 25/32"	2 25/32"	1"	Starrett	269B	0000000	000000


		Stainless Steel



				4	1 mm to 29 mm (0.05 mm Increments)	5 1/4"	5 1/4"	1 1/8"	—	—	0000000	00000

Tapered-Thickness Feeler Gauges

Replace an entire feeler gauge set with one of these tapered gauges that let you check a range of thicknesses. They’re used to check gaps, alignment, and narrow slots.

	Thk.
	Measured Range	Measuring Increments	Lg.	Wd.	Graduation Color		Each
Black-Oxide Steel



		0.005" to 0.250"	0.005"	18"	1/4"	White	0000000	0000000


		0.020" to 0.500"	0.005"	18"	1/4"	White	0000000	000000
		0.020" to 0.500"	0.005"	18"	3/8"	White	0000000	000000
		0.370" to 1.000"	0.005"	18"	3/8"	White	0000000	000000

Starrett Tapered-Thickness Feeler Gauges

Check a range of thicknesses with a single gauge that tapers in thickness. It’s used to check gaps, alignment, and narrow slots.

	Thk. Measured Range		Thk. Measuring Increments
	Inch	Metric, mm	Inch	Metric, mm	Lg.	Wd.	Mfr. Model No.		Each
Steel



		0.010" to 0.150"	0.300 to 4.000	0.001"	0.05	6 1/4"	7/16"	270	0000000	0000000

Starrett Tapered-Thickness Feeler Gauges with Calibration Certificate

A certificate of calibration traceable to NIST states that this gauge has passed a test for accuracy. Often used to check gaps, alignment, and narrow slots, it tapers in thickness for checking a range of thicknesses.

	Thk. Measured Range		Thk. Measuring Increments
	Inch	Metric, mm	Inch	Metric, mm	Lg.	Wd.	Mfr. Model No.		Each
Steel



		0.010" to 0.150"	0.300 to 4.000	0.001"	0.05	6 1/4"	7/16"	270	0000000	0000000

Tapered-Width Feeler Gauges


Gauge	Gauge with Breakaway Notches

Confirm slots, holes, and mating surfaces on parts are properly sized. Narrow at one end, these feeler gauges measure a range of sizes. Slide them into a hole until the gauge sits snug and then read the width measurement. All have a range of width markings for quick reference. Made of either stainless steel or plastic, they resist corrosion.

Plastic—Plastic feeler gauges won’t spark if struck and are nonmagnetic. This makes them safe to use with spark plugs and other electronic ignitions. Since they’re nonmarring, they won’t scratch nearby surfaces. Snap away lengths at the breakaway notches to get a snug fit across the width of shallow holes.

	Wd.
	Measured Range	Measuring Increments	Lg.	Wd.	Features		Each
Stainless Steel



		1/16" to 5/8" (1 mm to 15 mm)	1/64" (0.1 mm)	5 5/8"	5/8"	—	0000000	000000


		0.8 mm to 15 mm	0.1 mm	5 3/4"	5/8"	—	0000000	00000
		15 mm to 30 mm	0.1 mm	6 1/4"	1 1/8"	—	0000000	00000
		30 mm to 45 mm	0.1 mm	6 1/2"	1 3/4"	—	0000000	00000
		45 mm to 60 mm	0.1 mm	6 5/8"	2 3/8"	—	0000000	00000


		Plastic



				1 mm to 15 mm	0.1 mm	5 7/8"	11/16"	Breakaway Notches	0000000	00000