driving torque (insertion/removal) of metallic bone screws_Metallic Bone Screws_UnitedTest

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driving torque (insertion/removal) of metallic bone screws

Introduction
Specification
Accessories
Standard
LEAFLET & VIDEO
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Stipulated the torque required to measure when a metal bone screw is screwed in and out of the standard material to confirm the consistency of the product under test. The constant force is maintained at 11.17N, at a rate of 3r/min, first screwed in 4 turns, then 4 turns out.

Test procedure:

Bone screws are inserted into and removed from a test block (may be predrilled); specifications to ASTM F1839; clamping via specimen grips.

Screw bits are mounted via a quick-acting chuck and the screw is driven at a test speed of 1 to 5 rpm in accordance with the standard. If required, a constant axial preload can be applied.

A minimum of four screw revolutions are required.

Result:

Insertion/removal torque versus angle for the entire duration of the test

Axial load force versus travel for entire duration of test

Insertion Depth

Torque measuring range	0-5N.m
Resolution	0.001N.m
Torque sensor accuracy	Less than 0.5%F.S.
Speed accuracy	±0.01mm/min
Axial force load cell	200N/1000N (fulfill axial pull-out test)
Load cell accuracy	Less than 0.5%F.S.
Load cell resolution	0.001N
Linear displacement sensor range	More than 50m
Displacement sensor accuracy level	Less than 0.5%F.S.
Displacement sensor resolution	0.01mm
Torsion angle sensor	99999 degrees
Torsional angle accuracy	±0.2 degree
Torsion speed	1r/min to 30r/min free adjusting
Effective travel	400±10mm (can be increased on demand)
The coaxiality of the two chucks	≤ 0.2mm
Standard Power	220V, 50HZ, 1 phase, 0.4Kw
Working system	MS Win10