The utility model provides a small -size screw rod oil press, and technical key points include: tubular press hole and press bar that coaxially is arranged in press hole, press bar has the stress section that protrudes the press hole
tail end in axial direction, stress section has the limiting part that is in
abutment with press hole to limit press bar
axial displacement and can axial adjustment limiting position, still movably clamps the
thrust bearing that is used for reducing the frictional force of rotation between limiting part and press hole, the wall of press hole is close to
tail end and has the
slag hole of radial slagging. Only need to adjust the axial limiting position of limiting part, can adjust the clearance between press bar and press hole, not only can be applicable to different oil material, but also can make up the clearance that increases because of abrasion, prolongs the life. The axial stress between press bar and press hole is mutually offset during pressing and can reach
dynamic balance, not only can save the structure for fixed press hole or press bar, but also the load requirement of motor is lower, has reduced the cost, and the dismounting and cleaning are very simple.