Recommended Shaft Diameters
15/16, 1-3/16, 1-7/16,  1-11/16, 1-15/16, 2-3/16, 2-7/16, 2-11/16, 2-15/16
3-7/16, 3-15/16, 4-7/16, 4-15/16, 5-7/16, 5-15/16

Table 1:  Diameter Tolerance—Steel Shafting

Recommended Shaft Diameters—Diameters shown above are recommended for general use. Standard collars, couplings, bearings, pulleys, sheaves, clutches and other transmission items having bores as recommended are carried in stock, at least up to 3-15/16 in the principal trading centers.

Standard Shafting—Table 1, above, indicates standard shafting is cold drawn in the smaller sizes and turned and is commercially straight, and is readily machineable; suitable and recommended for general power transmission and material handling service.

Special Shafting—While standard shafting is suitable for most installations, special shafting is sometimes required for certain chemical, temperature or physical requirements. Special materials such as high carbon steel, alloy steel, stainless steel, and brass can be furnished plain or heat treated. Stepped, flanged, hollow or other special forms are available. Special shafting should be avoided if possible because it is usually more expensive and requires a longer lead-time to obtain, which is an important consideration if quick replacement is necessary..

Ordering Shafting—Standard shafting can be purchased  from most supply houses and dealers who handle power transmission material

Turning Down Shaft Ends— Turning down shaft ends may cause a stress riser in the shaft; therefore, a large a fillet radius should be used if possible to keep the stress concentration to a minimum. The radius of this fillet should generally be greater than the difference in the two diameters joined by the fillet. The fillet should be finished and polished to eliminate scratches that may propagate cracks that cause shaft fatigue.