<p>An adjustable coupler for linking an oscillating kneader to a gear box. The adjustable coupling has a slide coupler adapted to be slidably received within an output couple of a gear box. The slide coupler has external splines wherein the external splines mate with splines of the output couple thereby coupling rotation of the slide coupler with rotation of the output couple. The internal splines are capable of mating with external splines of a slidably received kneader input shaft thereby coupling rotation of the kneader input shaft with rotation of the slide coupler. A plug in the slide coupler abut the kneader input shaft in the slide coupler and a lock mechanism maintains the kneader input shaft abutted against the plug.</p>
