Feeler Gauges

A feeler gauge is a hand-held measuring tool used to measure the size of small gaps between two objects that are in close proximity. The tool has a number of folding metal strips (also known as blades or leaves) which are machined to specified thickness levels. They are usually made out of tempered tool steel or stainless steel and should be rust resistant.
Measurements are given in millimetres or inches and can be found on each individual strip. A feeler gauge fits into small gaps which can be less than 5.08mm and can take measurements as small as 0.02mm to 5.08mm.
The tool is ideal for use in spaces where other measuring devices such as a tape measure could not fit. They are flexible and easy to bend so they can fit into difficult positions.
Feeler gauges are mostly used in engineering to accurately measure the clearance between two parts to ensure that mechanical parts are in safe working order.
Parts of a feeler gauge:
● Case – either plastic or steel, and protects blades/leaves when tool is not in use, compact storage
● Locking device
● Leaves or blades – thin strips of metal with inscribed measurements on each referring to the thickness of the blade
What can feeler gauges measure?
Can be used for checking: tappet clearances, spark plug gaps, distributor points, bearing clearances and piston ring gaps.
Different types of feeler gauge:
● Go NoGo feel gauge – thick base and a thinner top, the thinner end is able to ’go’ into the gap and the thicker body will not ’no go’
● Straight lead feeler gauge – blades are consistently parallel
● Tapered feeler gauge – blades thin out towards the tip
● Double ended gauge
● Offset gauge – blades are bent towards the tip for easier access in most motor vehicle applications and work in restrictive areas
● Feeler strip – blades are not connected in a set and either end can be used to measure

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Description Price Number of Blades Imperial or Metric Blade Material Length Thickness Height Safe
RS Stock No. 450-4326
BrandRS PRO
$39.57
Each
units
13 Metric Brass - - -
RS Stock No. 449-9640
BrandRS PRO
$28.28
Each
units
25 Metric Steel - - -
RS Stock No. 263-5074
BrandRS PRO
$30.50
Each
units
25 Both Steel - - -
RS Stock No. 785-7822
BrandRS PRO
$114.32
1 Set
Set(s)
13 Both Plastic - - -
RS Stock No. 449-9634
BrandRS PRO
$13.92
Each
units
10 Imperial Steel - - -
RS Stock No. 785-7828
BrandRS PRO
$108.30
1 Set
Set(s)
13 Both Plastic - - -
RS Stock No. 449-9628
BrandRS PRO
$12.53
Each
units
10 Metric Steel - - -
RS Stock No. 290-4392
BrandRS PRO
$41.69
Each
units
16 Metric Steel - - -
RS Stock No. 785-7831
BrandRS PRO
$178.11
1 Set
Set(s)
20 Both Brass - - -
RS Stock No. 290-4364
BrandRS PRO
$51.04
Each
units
20 - Steel - - -
RS Stock No. 572-375
Mfr. Part No.DY5198
BrandStarrett
$5.75
Each (In a Pack of 5)
units
1 Metric Steel - 0.5mm -
RS Stock No. 300-6556
Mfr. Part No.804.L
BrandFacom
$76.32
Each
units
19 Metric - - - -
RS Stock No. 304-9121
Mfr. Part No.1705
$13.08
Each
units
20 Metric - - - -
RS Stock No. 300-6562
Mfr. Part No.804.P
BrandFacom
$32.41
Each
units
19 Metric - - - -
RS Stock No. 300-9971
Mfr. Part No.804
BrandFacom
$31.29
Each
units
19 Metric - - - -
RS Stock No. 124-8456
Mfr. Part No.729865A
BrandSKF
$64.62
Each
units
13 Both - - - -
RS Stock No. 304-9115
Mfr. Part No.1703
$7.58
Each
units
13 Metric - - - -
RS Stock No. 432-5000
Mfr. Part No.GAUGE SET
BrandParker
$554.09
Each
units
4 Metric Stainless Steel - - -
RS Stock No. 572-268
Mfr. Part No.DY5170
BrandStarrett
$8.732
Each (In a Pack of 5)
units
1 Metric Steel - 0.03mm -
RS Stock No. 124-8432
Mfr. Part No.729865B
BrandSKF
$153.98
Each
units
29 Both - - - -
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