No.236
GRAIN CRACKING TESTER
Overview of GRAIN CRACKING TESTER
This tester is used to conduct ball bursting test on upper leather of shoes and other thin leather.
Attaching the surrounding area of the test specimen to the clamp, the operator is to apply load to the grain side of the test specimen and is to read the height and the load when the grain crack appears.
Reference Standards
JIS K6557-10, (K6548)
Specification
| Specifications are subject to change without notice. | |
|---|---|
Test Sample | Diameter ø40 ± 5 mm |
Clamp | Inside diameter ø25 ± 0.5 mm |
Steel Ball | Diameter ø6 + 0.25 mm |
Plunger Speed | Control by handwheel (standard speed 12 ± 3 mm/min) |
Pressure Gauge | Max. 1.4 MPa (graduation 0.01 MPa), Max. 4.5 MPa (graduation 0.05 MPa) |
Dial Indicator | Graduation 1/100 mm, stroke length max. 20 mm |
Accessories | Plunger (for pushing the steel ball back inside the tester), zero reference plate |
Dimensions and Weight (Approx.) | W545×D340×H360 mm, 25 kg |
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