feeler gauge
clearance gauge

A feeler gauge is a tool used to measure gap widths.

Feeler gauges are mostly used in engineering to measure the clearance between two parts.

Clean the sparkplug then set the gap (with a wire feeler gauge) according to the manufacturer's recommendations.

He plunged back into his work, setting his tappets with a feeler gauge, cleaning the sumps, changing the oil.

As this rapidly wore out feeler gauges, long rolls of disposable feeler strip were needed instead.

I had a feeler gauge in hand and was fiddling with the valves when a car rolled up and parked in the driveway.

They may also be of built up construction in which one or more gage blocks or feeler gauges are sandwiched between two anvils.

A square to be tested can be presented to the master and feeler gauges used with a light behind the gap to get a reading of deviation.

The ring gap may be checked by putting the ring into the bore/liner (squared to bore) and measuring with a feeler gauge.

A taper feeler gauge is a feeler gauge of tapered, as opposed to parallel, shape.

Amongst the parts that need setup are seamer rolls and chucks which have to be set in their exact position (using a feeler gauge or a clearance gauge).

A clearance gauge is a measurement instrument intended to adjust a double seamer, replaces a filler gauge (also known as Feeler gauges, or gauge wires).

Use of a feeler gauge with flat blades instead of round wires, as is used on distributor points or valve lash, will give erroneous results, due to the shape of spark plug electrodes.

Seamer setup is usually done by an experienced individual, typically using a lifter height gauge, lifter height pressure gauge, and feeler gauges (small pieces of metal for go/no go testing of the distances between the roll and chuck toolings).

This adjustment was made by rotating the engine until the cam was at its lowest point, giving the widest gap, then adjusting the rocker until this gap was at the correct spacing, as measured with the use of a feeler gauge.

However it is necessary to check periodically the maximum opening gap of the breaker(s), using a feeler gauge, since this mechanical adjustment affects the "dwell" time during which the coil charges, and breakers should be re-dressed or replaced when they have become pitted by electric arcing.