... method: spring shaft, inner (outer) screw thread end, double flat end, double pin hollow end. Surface treatment:stainless steel, zincification(chroming), wrap ... taper, accumulate, right angle knuckle roller, block side roller. Small end diameter of taper roller:38.1 mm, 50.8 mm. ... objects or bottom-flatted objects such as various cases, bags, small or strange-shaped goods should be put in slaver and ...