The customer wants to polish the surface pulley crank shaft of car engine, which achieves Ra0.2 of surface roughness. Because good surface roughness will reduce wear on the workpiece, and then improve work efficiency.
Requirements
The surface roughness achieves Ra0.2μm after rolling burnishing.
1) Workpiece Material: Gray Cast Iron
2) Workpiece Diameter: 41mm
3) Workpiece Tolerance: 25μm
4) Workpiece Hardness: 18-22HRC
5) Shank Size of Tool: Morse Taper #2
Solution
As the customer’s requirements, RBT provides the OD stepped shaft burnishing tool for it. This tool is a customized tool, and also the rolling range can be adjusted from φ40.8-φ41.1, the minimum adjusted scale (each unit) is 0.0025mm, rotate speed is 500r/min, feed rate is 0.4-0.5mm/r.
More about OD stepped shaft burnishing tool, please review here: http://www.burnishingtoolhome.com/product/adjusted-od-stepped-shaft-burnishing-tools/
Using guide of OD stepped shaft burnishing tool: http://www.burnishingtoolhome.com/wp-content/uploads/2019/01/Using_Guide_of_OD_Stepped_Shaft_Burnishing_Tools.pdf 
Video of OD stepped shaft burnishing tool:
