Bally Flex Tester ULB-F11: Top China Suppliers & Factory for Leather Quality Assurance and Flexing Tests
Application
Bally Leather Flexing Tester: Used to determine the resistance of a material to cracking or other types of failure at flexing creases. The method is applicable to all flexible materials and in particular leathers, coated fabrics, and textiles used in footwear uppers.
Bally Flex Tester Feature
The test specimen is folded in half then one end is secured in a clamp. The test specimen is then turned inside out and the free end secured in a second clamp at 90 degrees to the first. The first clamp is repeatedly oscillated through a fixed angle at a defined rate causing the test specimen to flex. At set intervals the number of flexing cycles is recorded and the damage to the test specimen is visually assessed. The test can be carried out with wet or dry test specimens at ambient.
Test Standards
| Equipped with A type upper grips |
SATRA TM 55; IULTCS/IUP 20-1; ISO 5402-1; ISO 17694; EN 13512; EN 344-1 section 5.13.1.3 and annex C; EN ISO 20344 section 6.6.2.8; GB/T 20991 section 6.6.2.8; AS/NZS 2210.2 section 6.6.2.8; JIS-K6545; |
| Equipped with B type upper grips |
ISO 32100; DIN 53351; GE-24; ASTM D 6182 |
Key Specifications
| Model | ULB-F11-6 | ULB-F11-12 | ULB-F11-24 |
| Test Position | 6 Sets | 12 Sets | 24 Sets |
| Type of Upper Grips | Please choose the suitable type according to the Standards chart. | ||
| Flexing Angle | 22.5° ± 0.5° | ||
| Flexing Speed | 100 ± 5 cycles / flexes per minute | ||
| Counter | LCD 0 - 999,999 (adjustable) | ||
| Sample Size | 70 ± 5 x 45 ± 5 mm | ||
| Power Supply | 1∮ AC 220V 50/60Hz | ||
| Dimensions (L x W x H) | 700 x 300 x 340 mm | 780 x 450 x 360 mm | 1100 x 510 x 220 mm |
| Weight | About 45 kg | 60 kg | 70 kg |
Accessories
| Standard Accessories | Power line * 1 pc |
| Optional Accessories |
Hydraulic Rocker Pressure Tester (Cutter: 70 ± 5 x 45 ± 5 mm) |
Frequently Asked Questions
What is the primary function of the Bally Leather Flexing Tester?
The Bally Leather Flexing Tester evaluates the resistance of flexible materials—such as leather, synthetic leather, coated fabrics, and footwear upper materials—to cracking, peeling, or failure caused by repeated flexing creases.
What is the difference between A-Type and B-Type upper grips?
A-type grips comply with standards such as SATRA TM 55, ISO 5402-1, and EN ISO 20344, whereas B-type grips are engineered to meet standards including ISO 32100, DIN 53351, and ASTM D 6182. Grip selection depends on your testing criteria.
Can this tester evaluate materials in both dry and wet conditions?
Yes, the testing mechanism supports both dry and pre-conditioned wet specimens at ambient temperature to inspect durability under various simulated environmental conditions.
How many workstations/test positions are available?
The equipment comes in three standard models: 6-station (ULB-F11-6), 12-station (ULB-F11-12), and 24-station (ULB-F11-24) to fit different laboratory testing volume requirements.
What standard sample dimensions are required for testing?
The standard specimen size is 70 ± 5 mm by 45 ± 5 mm. Accurate preparation can be achieved using an optional hydraulic rocker pressure cutter.
What are the preset flexing angle and operation speed?
The machine operates with a standard flexing oscillation angle of 22.5° ± 0.5° and a fixed rate of 100 ± 5 cycles per minute (cpm).