Based on the scenarios above, the limiting factor is actually the crushing force on the key, and the maximum torque that can be transmitted is reduced by approximately 25 percent (337 Nm based on crushing failure with a key versus 447 Nm for a plain shaft). Again, it’s important to note that the calculations for a keyed shaft do not take into account any service, application, or safety factors. So the recommended maximum torque may be lower than the examples above, depending on other application parameters. Leonard, William Samuel (1919) [1905]. Machine-shop Tools and Methods (Revised 7thed.). New York: John Wiley & Sons. pp. 39–42. OCLC 848146647 . Retrieved 30 April 2019. Shaping or slotting is largely used for cutting keyways that do not extend through the full length of the part. Like keyseating, shaping uses a single-point cutting tool for cutting, however, shapers are not guided through the cut on a fixed post. As such, shaper cuts are generally more susceptible to deflection than keyseater cuts. [9] Milling [ edit ] They are normally specified for shafts with 0.25 to 1.0-in. Diameter but larger square keys are available for shafts up to 6.5 inches. Diameter. Designers use them when they want as much depth as possible with rectangular keys. 3. Parallel Sunk key

cheaper options with no signature required. The no signature required options are at the customer’s risk once the goods leave our store. Registered Australian Company: Small Parts & Bearings Pty Ltd (ABN 79 121 865 414) - Trading as Bearing Shop Online Keyed Shaft, what is a keyed motor shaft. In mechanical engineering, a key is a machine element used to connect a rotating machine element to a shaft. A machine runs by the power supplied to it by a prime mover such as motor, engine, etc. The power is then transmitted from the prime mover to the machine through a coupler which couples the shafts of the prime mover and the machine. A Scotch key or Dutch key features a circular keyway hole (instead of rectangular), produced by drilling axially into the assembled hub and shaft, with a metal dowel pin serving as the key. If the hole and key are tapered, the key is referred to as a Dutch pin, which is driven in and optionally finished by cutting or grinding flush with the end of the shaft. If a straight Dutch keyway hole is optionally tapped with a thread, then an ordinary screw serves as the threaded Dutch key.Connecting a shaft and a part is most commonly done by driving a small piece of metal, which is known as the key between the shaft and the hole that has been created in part mounted over it. The key settles in between the shaft and is partly into the part mounted over it. Axial grooves, otherwise known as key ways are cut in the shaft and then in part mounted on it. Then, the key is fitted between the shaft and the attached portion.

Tangent keys are used in heavy-duty equipment. These keys are actually a pair. These pair of keys are placed right angles to each other and tangent to the surface of the shaft, each key will withstand the torsion in one direction only. Whether you require a small- or large-width key bar, we have everything you might need under one roof. Our high-quality key steels are available in width and depth ranges from 3mm to 22mm, so you can browse through the different options at your leisure to find just the key steel you are looking for. It can be replaced to provide a high degree of strength or wear resistance. Austenitic (300 Series) stainless steel shaft key material should be used where the material will be exposed to a highly corrosive environment. High-strength materials are required and martensitic stainless-steel shaft key material should be used when exposed to mildly corrosive environments. Benefits and limitations of keyed joints Parallel keys are commonly used in mechanical and automotive engineering because of their inefficiency, availability, and ease of installation. A saddle key is a key for securing a member to a machine shaft that fits into a keyway in the secured member and is concave to grip the shaft by friction compared to a flat key, or sunk key.The key in the radius end component keyway of the main funnel simplifies assembly. And wing keys are easily inserted into the shaft. The radius helps align the key in the shaft slot. Installation is much easier when using a keyless connection, as the shaft position does not affect the motor, as the motor can slide in any position. While using a keyed connection, the keyways should be aligned to mount the reducer on the shaft. Sunk: These keys are set half in the keyway of the shaft and half in the keyway of hub or boss of the pulley. They come in following six types: