Bronze Machined Parts – Product Profile Posted by Hayley Basler on February 6, 2017 This bronze part is a special high strength piston slipper that is used in the hydraulics industry. The inside of the part is a special form spherical radius with an ultra-fine surface finish requirement. The size of the sphere is also very important to the end user and can be monitored with a special spherical air gauge. For more information on our precision machine services for bronze, copper, steel or any other metals, please contact E.J. Basler today.