index plate
Low/Very LowTechnical/Engineering
Definition
Meaning
A flat, circular plate with a sequence of holes or notches, used in mechanical indexing or positioning systems.
A calibrated rotating component, often on a dividing head or similar machine tool, that enables precise angular positioning (e.g., for drilling holes or cutting gears).
Linguistics
Semantic Notes
This is a highly specific technical term. It denotes a physical component, not an abstract concept. It is almost exclusively used in contexts of machining, manufacturing, and precision engineering.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or application. The term is identical in both technical dialects.
Connotations
Purely denotative and technical; no special connotations.
Frequency
Used equally rarely in both British and American English, confined to engineering workshops and technical manuals.
Vocabulary
Collocations
Grammar
Valency Patterns
The index plate is mounted on the spindle.Select the correct index plate for the required division.The pin engages with the holes in the index plate.Vocabulary
Synonyms
Strong
Neutral
Weak
Usage
Context Usage
Business
Never used.
Academic
Rarely used outside of specific engineering textbooks or papers on machining.
Everyday
Virtually never used.
Technical
The primary context. Refers to a key component in machine tools for creating precise circular divisions.
Examples
By CEFR Level
- The machinist changed the index plate to drill more holes.
- For this operation, you need a 36-hole index plate to achieve the correct spacing.
- The accuracy of the gear tooth profile is directly dependent on the tolerances of the index plate and the dividing head's worm gear.
Learning
Memory Aids
Mnemonic
Think of an 'index' finger pointing to a specific spot on a 'plate' (like a dinner plate with markings instead of food). The index plate points the machine to the exact position.
Conceptual Metaphor
A MAP FOR ANGLES (The plate provides a guide or map to locate specific rotational positions).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'индексная табличка' (an informational sign).
- The direct translation 'пластина индекса' is not standard. The established technical term in Russian is 'делительный диск' or 'индексный диск'.
Common Mistakes
- Using it to refer to a contents page (that is simply an 'index').
- Confusing it with a 'nameplate' or 'number plate'.
- Using it as a verb (it is a noun compound).
Practice
Quiz
In which field is the term 'index plate' primarily used?
FAQ
Frequently Asked Questions
No, it is a very low-frequency technical term specific to machining and mechanical engineering.
No. The 'index' is the list of topics at the back of a book. An 'index plate' is exclusively a mechanical part.
Its main function is to enable precise angular positioning or division of a circle, typically on a machine tool like a milling machine or drill press.
In most practical contexts, they are synonymous. Both terms refer to the same component used for indexing or dividing a circle into precise increments.