Screw Gauge / Micrometer Manufacturer,Supplier and Exporter in India
Product Code : SCL-LM-11255
The Screw Gauge / Micrometer measures small dimensions by converting the rotary movement of a threaded spindle into controlled linear movement. The object is positioned between the anvil and spindle, and the measurement is read from the instrument's main scale and circular or thimble scale.
This instrument is suitable for demonstrating pitch, least count, zero error and precision measurement in school and college physics laboratories. Its actual measuring range, least count, frame construction, spindle design and scale configuration must be confirmed against the supplied model before publication or procurement.
Key Features
Precision measurement: Designed to measure the small thickness or external diameter of compatible specimens.
Threaded spindle mechanism: Converts controlled rotational movement into linear displacement for measurement.
Dual-scale reading: Uses a main scale and a circular or thimble scale to determine the final value.
Controlled contact: The spindle is advanced gradually to reduce excessive pressure on the specimen.
Educational value: Demonstrates pitch, least count, zero error, zero correction and observational accuracy.
Manual operation: Requires no electrical supply, batteries or software.
Reusable laboratory instrument: Suitable for repeated supervised practical sessions when correctly handled and stored.
Technical Specifications
|
Specification |
Detail |
|
Product name |
Screw Gauge / Micrometer |
|
Instrument type |
Manual external dimensional measuring instrument |
|
Primary measurements |
Small external diameter and thickness |
|
Scale arrangement |
Main scale with circular or thimble scale |
What's Included in the Kit
One Screw Gauge / Micrometer
A storage case, calibration reference, adjustment tool or instruction sheet is not stated as included and should be confirmed before ordering.
Applications / Uses
Measuring the diameter of thin wire.
Determining the thickness of a metal sheet or plate.
Measuring the diameter of small spherical or cylindrical specimens.
Demonstrating the pitch and least count of a screw gauge.
Identifying positive or negative zero error.
Teaching zero correction and repeated-observation techniques.
Supporting practical measurement exercises in school and college physics laboratories.
How to Use the Screw Gauge Micrometer
Clean the anvil, spindle face and specimen before taking a reading.
Close the measuring faces gently and check whether the instrument has a zero error.
Rotate the thimble to create enough space between the anvil and spindle.
Place the specimen centrally between the measuring faces.
Advance the spindle slowly until it makes light, even contact with the specimen.
Record the main-scale reading and the aligned circular-scale division.
Calculate the observed measurement using the confirmed least count.
Apply zero correction when a verified zero error is present.
Repeat the measurement at several positions and compare the readings.
Safety and handling note: Do not overtighten the spindle. Excessive force can deform delicate specimens, damage the screw mechanism or produce an unreliable reading.
Care & Maintenance
Wipe the measuring faces with a clean, dry and lint-free cloth after use.
Store the instrument in a dry protective case with the measuring faces slightly separated.
Do not drop the instrument or force the thimble beyond its normal movement.
Periodically check zero alignment and measurement consistency using an appropriate reference.
Why Choose Lab Exports
Lab Exports manufactures, supplies and exports scientific and educational laboratory equipment for schools, colleges, universities and training institutions. Its portfolio includes physics apparatus, laboratory experiment setups, science kits, mathematics kits, didactic models and STEM learning equipment. Buyers can submit required ranges, quantities, packaging details and tender specifications for commercial review. Final performance data should be confirmed in the approved quotation or technical datasheet.
Frequently Asked Questions
What is a screw gauge micrometer used for?
A screw gauge micrometer is used to measure small external dimensions, such as wire diameter, sheet thickness and the diameter of small specimens.
What is the least count of this micrometer?
The least count depends on the pitch and scale divisions of the supplied model. The exact least count must be confirmed from the product specification.
How is a micrometer reading calculated?
The main-scale reading is combined with the circular-scale reading multiplied by the instrument's least count. Any verified zero correction is then applied.
Can this screw gauge be used in schools?
Yes. It is suitable for supervised physics practicals involving dimensional measurement, least-count calculations and zero-error correction.
Can it measure the internal diameter of a tube?
A standard external micrometer is not intended for internal-diameter measurement. An internal micrometer or suitable vernier caliper should be used for that purpose.
Why should the spindle not be overtightened?
Overtightening can compress the specimen, strain the threaded mechanism and change the observed reading. Only light, consistent measuring pressure should be applied.
Explore related properties of matter laboratory equipment, browse the complete physics laboratory equipment range, or contact Lab Exports to confirm the measuring range, least count and supply configuration.
``` **Recommended image ALT text** 1. `Screw Gauge Micrometer for precision physics laboratory measurement` 2. `Screw gauge micrometer showing anvil spindle and thimble` 3. `Micrometer measuring the diameter of a thin wire` 4. `Screw Gauge Micrometer main scale and circular scale` 5. `Manual micrometer for school physics practical experiments` **SEO product data Product category:** Physics Laboratory Equipment – Precision Measurement Instruments * **Intended users:** Secondary-school students, college students, physics teachers, laboratory technicians, vocational institutions and educational-equipment buyers * **Standards or certifications:** No product-specific standard or certification verified * **Primary keyword:** Screw Gauge Micrometer * **Secondary keywords:** micrometer screw gauge, physics lab micrometer, precision measuring instrument, wire diameter measuring instrument, sheet thickness gauge, external micrometer, screw gauge least count, school physics measurement apparatus Internal links: Properties of Matter, Physics Laboratory Equipment and Contact Lab Exports
