What is BS 4823 - fitment bores for cylindrical shaft ends about?
1.1 This British Standard relates to (1) cylindrical shaft ends and (2) to conical shaft ends with parallel keyway, having a conicity of 1 in 10; both types in diameters from 6 mm to 630 mm inclusive.
1.2 Provision is made for long and short series of both cylindrical and conical shafts (2) over most of the diameter range and for the use of both external and internal screw threads for the securing nut or bolt on conical shaft ends.
NOTE 1 Recommendations for blending radii, and form and positional tolerances are being considered.
NOTE 2 Conical shaft ends with Woodruff keys and keyways will be the subject of a future standard.
BS 4823 is a British Standard that offers guidance in the selection of a suitable shaft fitment bore tolerance for use with the cylindrical standard metric shaft ends of 6 mm to 220 mm diameter specified in BS 4506.
Three classes of nominal fit, viz. interference, close, and free, are considered. Heavy interference, or “shrink”, fits where the design torque is transmitted by interfacial friction are not considered as these require detailed individual study.
Who is BS 4823 - fitment bores for cylindrical shaft ends for?
BS 4823 on the fitment bores for cylindrical shaft ends is useful for:
- Manufacturers and suppliers of gears
- Manufacturers and suppliers of gear-based machinery
- Manufacturers of gear-based products such as pumps, cars, trains, etc.
- Product design teams / innovation teams
- Production / mechanical engineers
- Quality control personnel
- Health and safety authorities
Why should you use BS 4823 - fitment bores for cylindrical shaft ends?
Shafts transmit power from one rotating member to another supported by it or connected to it. Bores house the shafts, and the dimensions of the bores affect the functioning of the shafts.
BS 4823 gives you the specification for fitment bores for cylindrical shaft ends with details such as classes of nominal fit and bore tolerances.
BS 4823 provides bore tolerances for:
- Interference fit
- Close fit
- Free fit
Using BS 4823 guidelines, you demonstrate compliance with best practices and manufacture high-quality products for your customers.
