Screw structural testing:
1. revolution of strength test: A product's torsion force is demonstrated that it resists is reversed two halves ability. Each kind of standard has the stipulation tapping screw torsion force lowest request. This test is the screw clamp, in the torsion force test has on one to have attacks the tooth middle division in the cartridge, then with the torque wrench application of force, wrenches apart until luo the nail. If the torsion has not surpassed the stipulation the lowest request, measured that this product is unqualified. Is unqualified demonstrated that luo the nail is too soft or luo the grain wants the diameter to be too small.
2. the lock moves the test: This test is locks luo the nail to one measures the test plate, this board has the stipulation degree of hardness \ thickness and the aperture. If luo the nail locks has measured the test plate, but luo the grain distorts, then this product is unqualified. Is unqualified demonstrated that luo nail surface hardening processing is too shallow or is too soft.
3. the lock moves the torsion test: This test only then the screw rod rolls the system luo the nail only then to need. When carries out the lock moves the test, observes measured that test plate's smallest lock moves the torsion. If the torsion surpasses the stipulation the standard value (standard value is basis luo nail's size \ surface treatment decides), then this product is unqualified. Is unqualified demonstrated that luo nail's superficial not enough lubricating ability, or luo the grain takes shape improper must a bigger torsion.