STD-TE 87 MULTI-STATION CIRCULAR TRANSLATION PIN ON DISC MACHINE

Introduction

STD-TE 87 Multi-station Circular Translation Pin on Disc Machine is manufactured under licence from Dr Vesa Saikko, Laboratory of Machine Design, Department of Mechanical Engineering, Helsinki University of Technology. It is based on his Super-CTPOD machine design. It is a highly compact, cost effective and easy to operate wear test device for the evaluation of prosthetic joint materials. It can be supplied with a total of either 50 or 100 sample test stations. This capacity makes it possible to test many different material combinations simultaneously, under identical test conditions.

Although nominally a pin on disc machine, the motion is not that of a conventional machine in which the disc rotates about its own axis, with corresponding uni-directional sliding at the pin face. In the STD-TE 87. the disc follows an orbital path without rotation. The pin track may be adjusted to be circular, elliptical or linear reciprocating.

This orbital motion following a circular or elliptical path is similar to that generated in multi-axis hip joint simulators and produces wear that correlates well with these types of device and with in vivo behaviour. Typically, for tests with a UHMWPE pin loaded against the Co/Cr disc, the wear is confined exclusively to the pin, with well-rounded PE debris generated, with a size range of 0.1 to 1.0 microns, with the majority of particles of 0.25 microns diameter.

Technical Specifications