Gelbo Flex Tester Manufacturer,Supplier and Exporter in India
Product Code : EL-PTE-13203
Quick Answer: The Gelbo Flex Tester is used to determine the flex resistance of flexible barrier materials. A pair of cylindrical mandrels holds the specimen, an eccentric and link mechanism gives one mandrel a movement of either 155 mm or 80 mm, and a motor drives the cycle at a specified frequency.
Last updated: October 2026
Key Features
- Pair of cylindrical mandrels holds the test specimen, fixed with double sided adhesive tape
- Eccentric and link mechanism gives 155 mm or 80 mm of movement to one mandrel
- Moving mandrel rotates during the initial part of its travel
- Motor operated drive gives motion at a specified frequency
- Digital pre set counter with infra red sensor stops the motor automatically after the desired number of cycles
- Memory back-up keeps the cycle count if the power fails
Technical Specifications
| Specification | Value |
|---|---|
| Mandrels | Pair of cylindrical mandrels, axes horizontal and coinciding |
| Specimen fixing | Double sided adhesive tape |
| Movement of moving mandrel | 155 mm or 80 mm |
| Drive | Motor operated eccentric and link mechanism |
| Counter | Digital pre set counter with infra red sensor and memory back-up |
| Fixed mandrel | Held firmly during the test |
About This Product
Flex testing shows how well flexible packaging films resist the cracking caused by repeated bending and twisting. In the Gelbo test the film is mounted on two mandrels and flexed by a twisting motion, followed in most cases by horizontal motion, which repeatedly twists and crushes the film. Pinhole formation is the usual criterion for failure, although gas transmission rate or water vapour permeability can be measured instead. The counter records the number of operating cycles.
Frequently Asked Questions
Q1. What does the Gelbo Flex Tester determine?
It determines the flex resistance, or flex durability, of flexible barrier materials. Pinhole formation is the criterion for failure, although other tests such as gas transmission rate or water vapour permeability can be used in its place.
Q2. How is the test specimen held?
The specimen is held on the cylindrical mandrels with double sided adhesive tape. The axes of both mandrels are horizontal and coincide with each other, and one mandrel is held firmly during the test.
Q3. How does the tester count the cycles?
A digital pre set counter with an infra red sensor counts the operating cycles, keeps the count in memory if the power fails and stops the motor automatically after the desired number of cycles.
Related: Plastic Testing Equipment, Dart Impact Tester, Bottle Compression Tester, Melt Flow Index Apparatus.
For a quotation on the Gelbo Flex Tester, contact School Lab Equipment India.