McMasterCarr Drive Shaft Guide（McMasterCarr传动轴指南）.pdf

Katie Ammons McMaster-Carr Drive Shaft Guide Things to consider first: • Diameter • Straightness tolerances: a tighter tolerance means more even distribution of load and more accuracy. The straighter the shaft the smoother the system. Available Materials: Steel, Stainless Steel, and Aluminum Range of Specs: Can be measured in either metric or inches. Diameter: 1/32” – 2 ½” or 1mm – 50mm Length: 1 1/16” – 96” or 200mm – 2,500mm Two main Types: • Drive Shafts: ROTARY MOTION o Often used with rotary bearings or a system of gears, pulleys, or other power transmission components. o These shafts are often not hardened, which makes them easier to machine. • Hardened Shafts: LINEAR MOTION o Used most commonly with liner ball bearings and linear sleeve bearings. o The kind of finish on these hardened shafts is important. Different surfaces generate different amounts of friction, which effects efficiency and the life of the bearings.  There are two measured components that determine a shaft’s hardness: micron value and case hardness. The smaller the micron value, the smoother the surface. The higher the case value, the harder the shaft. Keyed: For a secure hold in higher-torque applications. With Support Rail: Shaft and support rails in one easy to install unit. Use with open-style linear bearings. Tapped/Threaded: To save time and avoid the hassle of machining.