Internal Spring Caliper
Product Code : EL-MAILE-10848
Internal Spring Caliper (code EL-MAILE-10848) is an inside caliper whose legs turn outward, used to measure inside dimensions such as the inside diameter of a pipe or tube. This Style A-4 caliper covers 0-4 in and has a flexible bow spring with central spring-type solid nut adjustment, curved tips, flat stock steel legs, a hardened fulcrum stud and a satin chrome finish, and it weighs 2.61 ounces.
Get a quote: use the Add To Cart enquiry button below, or send your quantity and delivery location through the contact page.
Specifications
| Parameter | Detail |
|---|---|
| Type | Inside caliper; legs turn outward |
| Style | A-4 |
| Range | 0-4 in |
| Length | 4 in |
| Weight | 2.61 ounces |
| Adjustment | Centrally located, spring-type solid nut, for smooth action |
| Bow spring | Flexible yet strong |
| Tips | Curved, for transferring the internal size of an object |
| Construction | Steel; legs of flat stock |
| Fulcrum stud | Hardened |
| Finish | Satin chrome, for ease of reading and resistance to rust |
| Handling | Arms of fairly light metal; can be sprung out of shape easily, so a light touch is needed |
| Product code | EL-MAILE-10848 |
| Manufacturer | Engineering Lab Equipment, Ambala, Haryana, India |
What Is the Internal Spring Caliper Used For?
Inside calipers take the size of holes, bores and the inside of pipes or tubes, which a rule cannot measure directly. The operator opens the legs with the central nut until both curved tips just touch opposite sides of the bore, feels for the largest setting across the diameter, then withdraws the caliper and reads the distance between the tips on a rule. Because the arms are made of fairly light metal, a light touch is needed, and the result depends very much on the skill of the machinist using it.
What to Specify When Ordering
- Quantity — the number of internal spring calipers required.
Frequently Asked Questions
What is an internal spring caliper used for?
It measures inside dimensions, such as the inside diameter of a pipe or tube, using outward-turned legs whose curved tips are set across the opening.
How does it differ from an outside caliper?
Inside calipers have legs that turn outward to measure internal sizes, while outside calipers measure external sizes such as the outside diameter of a tube or a piece of bar stock.
What size and style is it?
This is Style A-4, covering 0-4 in, with a length of 4 in and a weight of 2.61 ounces.
Why does it have a satin chrome finish?
The satin chrome finish makes the caliper easier to read and gives it resistance to rust in workshop use.
Does the caliper need careful handling?
Yes. Its arms are made of fairly light metal, so they can be sprung out of shape easily; a light touch is needed, and results depend on the machinist.
How can this caliper be ordered?
Place an enquiry with the Add To Cart button on this page, or give the quantity and your delivery location through the contact page.
OEM Manufacturer
The Internal Spring Caliper is made by Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd) at its works at Plot No. 43, Industrial Park, Sector 2, Growth Center, Saha, District Ambala, Haryana, India. The company designs, makes and tests measuring instruments and instrumentation trainers for engineering laboratories for engineering colleges, polytechnics, technical training institutes and research laboratories in India and overseas, and can build equipment to an institution's own requirements. Tender and OEM enquiries are handled through the Tenders/OEM page.
Related Measuring Instruments
- Spring Caliper External — outside caliper, Style A-4, 0-4 in, with inward-curved tips, bow spring and solid nut adjustment.
- Internal Micrometer Digital — caliper-jaw inside micrometer with carbide contact pins, inch and metric LCD and SPC output.
- Internal Micrometer Manual — manual inside micrometer with interchangeable range-marked rods, spacing collars and satin-chrome finish.
See the full Measurement and Instrumentation Lab Equipment range or all Mechanical Engineering Lab Equipment.
Request a Quote
For this and other measurement and instrumentation lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India. To ask for a quotation, send the number of internal spring calipers required and your delivery location through the contact page, or use the Add To Cart enquiry button on this page.
Last updated: October 2026
