feeler gauge
C2Technical
Definition
Meaning
A precision tool consisting of a set of thin, flat metal strips of varying, precisely measured thicknesses, used to measure narrow gaps or clearances between objects, especially in mechanical and engineering work.
Metaphorically, it can refer to any method of cautiously assessing or testing a situation, opinion, or the likelihood of something before making a firm commitment.
Linguistics
Semantic Notes
The term is highly specific to technical and mechanical engineering contexts. In literal use, it is a countable noun ('a feeler gauge', 'several feeler gauges'). The metaphorical extension is rare but understood in contexts of diplomacy or negotiations.
Dialectal Variation
British vs American Usage
Differences
No significant difference in the literal term. Spelling of related terms may differ (e.g., 'metre' vs. 'meter').
Connotations
Identical in both dialects for the primary technical meaning.
Frequency
Almost exclusively used in technical contexts in both dialects. Not part of everyday vocabulary.
Vocabulary
Collocations
Grammar
Valency Patterns
[subject] uses a feeler gauge to [verb] (e.g., 'The mechanic used a feeler gauge to check the piston ring gap.')[subject] measured [noun] with a feeler gaugea feeler gauge of [measurement] (e.g., 'a feeler gauge of 0.2mm')Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “put out feelers (metaphorically related)”
Usage
Context Usage
Business
Not used in general business; only in specific industrial procurement or technical sales.
Academic
Used in engineering textbooks, manuals, and technical papers.
Everyday
Extremely rare outside of DIY or mechanical hobbies.
Technical
Core terminology in mechanical engineering, automotive repair, machining, and precision manufacturing.
Examples
By Part of Speech
verb
British English
- The engineer will gauge the clearance with a feeler gauge.
- He carefully gauged the tappet clearance.
American English
- The mechanic gauged the spark plug gap with a feeler gauge.
- You need to gauge the valve lash.
adjective
British English
- The feeler-gauge measurement was critical.
- He made a feeler-gauge check.
American English
- The feeler-gauge reading is off.
- Follow the feeler-gauge procedure.
Examples
By CEFR Level
- This is a tool.
- It is made of metal.
- A mechanic uses a feeler gauge to measure gaps.
- The tool has many thin blades.
- Before assembling the engine, he checked the piston ring gap with a feeler gauge.
- You need a 0.15mm feeler gauge to set the valve clearance correctly.
- The precision of the machining was verified using a calibrated feeler gauge to ensure the tolerances were within two thousandths of an inch.
- Diplomatically, his speech acted as a feeler gauge to test the reaction of the opposing faction before formal negotiations began.
Learning
Memory Aids
Mnemonic
Imagine a mechanic 'feeling' a gap with a thin metal strip to gauge its size.
Conceptual Metaphor
MEASUREMENT IS PRECISION; TESTING IS PROBING.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calques like '*чувствующий измеритель'. The standard Russian equivalent is 'щуп' (shchup).
- Do not confuse with 'sensor' or 'detector'.
Common Mistakes
- Incorrect plural: 'feeler gauges' (not 'feeler gauge').
- Misspelling: 'fealer gauge', 'filler gauge'.
- Using it as a verb (e.g., 'I will feeler gauge the gap' is incorrect).
Practice
Quiz
What is the primary function of a feeler gauge?
FAQ
Frequently Asked Questions
It is a two-word compound noun, often hyphenated when used as a modifier (e.g., 'feeler-gauge measurement').
Its primary design is for measuring gaps, clearances, and small distances. It can indirectly check flatness or parallelism by probing for gaps.
They are commonly marked in both metric (millimetres) and imperial (thousandths of an inch) units.
A feeler gauge is a passive, go/no-go tool for measuring gaps by inserting a blade of known thickness. A micrometer is an adjustable, precision measuring instrument used to directly measure the external dimensions of an object.