The commonThe shaft shown in the figure is driven by a gear at the right keyway, drives a fan at the left keyway, and is supported by two deep-groove ball bearings. 025 mm and +0. A frictional connection between shaft and component solves the problems associated with backlash, and additionally eliminates the machining operations required for keyways. You can specify 2X on the features of size for your keyway. 010". Keyway Bore Diameter Size Bore Reference -0. 3/32. 015/-0. At steady-state speed, the gear transmits a radial load of 230 lbf and a tangential load of 633 lbf at a pitch diameter of 8 in. 4 Splines 9. We can provide keyed shafts in any length up to 20 foot. 3. Standard keyways provide added torque capacity and fixed shaft phasing. Stocked in a variety of materials. We carry a wide range of products with keyways, including bushings and roller chain sprockets. The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. scope: This standard presents inch dimensions, tolerances, and sizes for straight bores, tapered bores, single keys and keyways for unmounted industrial flexible couplings. 140 mm to 500 mm – 20 mm step. That combined amount of clearance forgives a few thousandths of off-centeredness to a shaft keyway. The corresponding shaft tolerance needs to be determined based on whether the fit between the gear and shaft is to be an interfer-ence fit, a transition fit, or a clearance fit. The automatic centering V-base is quick and easy to set up and clamps on any shaft from 1. 25 is a group of 3 standards: B18. clearance fit bores with set screws. Saddle keys are one of the shaft key types which is installed on the surface of the shaft and not in the keyway on the shaft. Keyway Cutter Hole Keyway Dimensional Data for MIlling Centers and Arbors - ANSI/ASME B94. 3D Printing & CAD. A further disadvantage to shaft keys in a world of increasingly compact motion components is the reduction in the torque density of the shaft and its respective locking element. 2 - Woodruff Keys and Keyways; B18. Ruland disc couplings are manufactured in clamp or set screw style, with or without keyways, in bores sizes from 1/8” to 1-1/4” and. Tapered Gib Keys. This key stock is undersized, so keys will fit slightly more loosely than standard keys and are best for inconsistent keyways. Unless otherwise specified, the shaft keyway is assumed to be standard. They can be completely disassembled and placed anywhere on a shaft. 5000 2. 010". 2. Referencing Figure 1, the keyway dimension is W x T 1. Use the keyways with machine keys to transmit torque to gears, sprockets, and other keyed components. 38 2. They are called “keys” because they lock a component to the shaft by means of a corresponding keyway in a shaft. 2. In this comprehensive guide, we will discuss seven popular internal keyway. Saddle keys The saddle keys are of the following two types : 1. The information contained with ANSI/AGMA 9002-A86 did not necessarily agree with some commonly used specifications. ANSI Woodruff Keys. [14] the frozen-stress photo elastic technique has been used to determine the complete surface stress field in empty keyways of British Standard proportions for rectangular keys. The gib head makes them easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. 350 Maximum 2. Provided by TNN Engineering. A capital letter refers to the hole size and lower-case letter refers to the shaft size. Check Details. As noted above, when selecting a keyway tolerance, there are two common selections in the metric system. 1 - Square and Rectangular Keys and Keyways; B18. Further, shafts, along with any other required drive elements, can be made smaller once the keyway notch factor is removed. Keyways are generally used in fastening gears to a shaft, and they should be secured by applying drilled holes for set screws, or applying flats to the shaft, in case of fastening only with set screws. Shaft couplings shall be so constructed as to present no hazard from bolts, nuts, setscrews, or revolving. 0 2 2 9 10 3 1. 3mm 2. As noted above, when selecting a keyway tolerance, there are two common selections in the metric system. Install them in keyways to transmit torque from shafts to gears and other components. The one edge of the shaft is completely inside the shaft side. One could have skipped the step. The second is a P9 tolerance. 120. 000 +. Shaft Dia. Keyway Depth. ANSI/AGMA 9002-A86 was based upon the design criteria related to bores and keyways in coupling hubs that had evolved over many years of successful industry practice. 9. KeyWay. 1. The first is Js9. To use a key as a sacrificial part, choose a softer key that will shear off. The length of the coupling hub keyway is 4 inches long and it is also 3/8″ deep. That is, for a 1/2" key the depth of the keyway would be . Woodruff Keys: The woodruff key is so called because of its manufacturing. The key should fit snuggly in the keyway with minimal side Standard keys should be the same length or slightly longer than the keyway in the hub. A Key goes into the Keyway to lock things up. This type of shaft has a tighter tolerance, nicer finish, and has been polished. You can measure the taper bore of a propeller with digital vernier calipers. 1875 0. MPTA-C6m-2009 FAQ ON METRIC BORES AND KEYWAYS IN COUPLINGSThis International Standard specifies the dimensional characteristics of tangential keys and of their corresponding keyways in shaft and hub. ). This standard presents inch dimensions, tolerances, and sizes for straight bores, tapered bores, single keys and keyways for unmounted industrial flexible couplings. After cutting a keyway in a shaft, a key is placed in the seat and the two parts can now be mated together. New keyless locking devices offer an alternative for challenging motion applicationsOur 5/8" shaft with keyway will serve your assembly well. The key and key seat cross section are ISO standardized. Keys and keyways, splines. 6 - M 18. 08-0. B +0. Related. Standard Metric Keys & Keyways for Metric Bores with One Key • Couplings (Page 2 of 2) All Types 427-140 Reo a 21 (P eso) oola e el 11 pesees 2 Telepoe 22 a 22 eoo Key & Keyway Dimensions – Millimeters Coupling Hub Keyway Dimensions – Inches Shaft Diameter “D” Key Size Nominal Keyway Width Hub “W” Keyway Depth Hub “T2” Shaft Diameter vs Key Sizes Design Recommendations. For a shaft key to function properly, both the shaft and rotating elements ( gear, pulley, and coupling) must have a keyway and a keyseat. This standard presents inch dimensions, tolerances, and sizes for straight bores, tapered bores, single keys and keyways for unmounted industrial flexible couplings. 1. 4. Normally with an open ended keyway people drill and tap on the bottom joint line of the shaft/keyway and lock the two together with a grub screw. Keyway (Shaft. 1 8 3 +0. width tol. 020 0. 1 Square Keyway Tolerances Minimum 2. w = Width of the keyway, d = Diameter of shaft, and h = Depth of keyway =Thickness of key (t )/2Applied shaft diameter d Key size Keyway size; b h c or r Standard size of b1 and b2 b1 tolerance （H8） b2 tolerance （F7） r1 and r2 t1 t2; Standard size Tolerance（p7） Standard size Tolerance （h9） Standard size Tolerance Standard size Tolerance; 4×4: 10 or more and 13 or below: 4 +0. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. 5 SHAPE, DIMENSIONS AND TOLERANCES OF KEYWAYS 8 -4 X Sect ion X-X Detail A Vaiues in millimetres Shaft Keyl ) Keyway Diameter d Width b Depth*) Sect ion bXh Radius r Tolerante for class fit Free Normal Close Shaft tl Shaft Hub Hub and hub H9 DIO IV9 Js9 P9 nom. 9" shafts 10 feet long. 2-1967. The 22 x 14 suggestion makes a lot of sense, unless prevented by thin-walled hubs and/or shaft size issues. The center of the keyway is typically located 1/3 of the. 2 Exceptions . ISO/R 774:1969. 062 0. Straight Sided Spline Dimensions. If your measuring from the OD of the shaft there is a formula in Machinery Handbook to add that dimension to the half size of the key but don't depend on it for the right depth to cut to. As bushing bores approach the maximum recommended diameters, keyway depths are reduced in order to extend maximum bores as much as possible. Figure 2 — Types of key and position of keyway in shaft 18 Table 1 — Rectangular parallel keys, keyways and keybars 4 Table 2 — Square parallel keys, keyways and keybars 6 Table 3 — Rectangular taper keys and keyways, gib-head or plain 9 Table 4 — Square taper keys and keyways, gib-head or plain 10 Table 5 — Woodruff keys and keyways 12 1) Unless specified by the customer: 2) Actual shaft fit will vary depending on - Series S couplings supplied with actual shaft diameters. EN Standard. Coping with foreign bore and keyway standards | Machine Design. The intention of the keys/keyways is to allow axial motion of a female sleeve to which the keys are mounted while preventing rotational motion. Mechanical & Motion Systems. Woodruff Keys. 112 MPa for shafts without allowance for keyways; 84 MPa for shafts with allowance for keyways; The most commonly used material for developing power-transmission shafts are Hot rolled steel bars, low-carbon steel, or an alloy (AISI/SAE 4140, 4340, and 8620). ASTM Standard. 414 Maximum 2. We also have an Imperial Keyway Calculator. 1-1967, ASME standard B17. rad 10 12 4 4 2. 010 0. Measure the overall length of the boss (hub) of propeller Measure the keyway width. Custom and interrupted keyways machined with quick turnaround; Keyed shafts can be furnished with a key already inserted, assuring a proper fit; Ground to a mirror finish of RMS 8 or better. This Standard covers requirements for square and rectangular parallel keys and keyways intended for both alignment of shafts and hubs, and transmitting torque between shafts and hubs. The shaft is made from AISI 1020 cold-drawn steel. T. Good for use with square- and hex-profile shafts, these aluminum supports also work with round shafts of any diameter up to. Keyway broach 1/16 to 1-1/2 inch, 2. 1The tables below show the dimensions of a straight sided spline in accordance with BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements. NOMINAL SHAFT DIAMETER. This standard is applicable to couplings as defined in ANSI/AGMA 9009-D02, Flexible Couplings - Nomenclature for Flexible Couplings, with metric bores and keyways. For reliable shaft connections, keyless locking devices may be the answer. Tapers - charts and how to measure. 0mm to 26. For a key to function, the shaft and rotating machine element must have a keyway and a keyseat, which is a slot and pocket in. 5 in (170 mm). A list of standard keyway and corresponding key sizes for English shafts are listed below in Table 1. Flat saddle key, and 2. It is noted that this is equivalent to a stress concentration. 1 +0. 25 - M 1. The standard keyway (USA Standard ANSI B17. So you have to determine the chordal height of the diameter for the width of the keyway. It also gives the relation to be observed between the diameter of the shaft and the section of the key. Whitney key and of the corresponding keyways in shaft and hub. All keyed Shafting is guaranteed to fit on a bearing, and the ends can be. Key strength and steel analysis entering into the makeup of stock for keys is not within the. Referencing Figure 1, the keyway dimension is W x T1. 3 mm) in diameter with a standard bar clamp. The connection level key is placed in the keyway of the shaft and shaft parts. 2. 1 mm) in diameter. 00: 10:. Recommended Hub Keyway Dimensions (mm) Reference AGMA 9112-A04 Standard metric keyway width tolerance per Js9 Imperial Standard Bore and Keyway Info Recommended Bore Tolerance for Imperial Shafts (Inches) Nominal Shaft Range Shaft Tol. Shaft Diameter vs Key Sizes Design Recommendations Gear Products and Suppliers | Gear Knowledge Menu Recommended ANSI Standard Keys and Keyseats Design per. Cut it to length to create the machine key you need. Shaft with Two Keyways Torque Applied Deformation and Stress Equations and Calculator. Metric Shaft Size Keyway Width Keyway Depth Stock Lengths 5/8" 3/16" 3/32" 13mm: 5mm: 2. 3mm 3. For a key to function properly, both the shaft and rotating elements (gear, pulley and coupling) must have a keyway and a keyseat. 250"+. It is true that these ANSI standards define different products than ISO specs. [3/31/23] Straight Rotary Shafts with One End Tapped and Key Grooves are available in 1045 Carbon Steel or Equivalent and 304 Stainless Steel, with the following options for Surface Treatment : Black Oxide, and. For special purposes, stainless steel shafts usually of steel designation 304 or 316 shall be used. The main reason of failure of shaft and keyways in shaft-hub connection is the shear stress, so the focus is done on it. Keyway Connection. keyways in the shaft members than to keyways in coupling hub bores. This is according the DIN OK. finished steel stock for parallel keys. WIDTH. 5. A key prevents a relative rotation between the two parts, and may enable torque transmission to occur. Keys and keyways. 000 / -0. The first is Js9. refers to a single rounded end. %PDF-1. All keyed Shafting is guaranteed to fit on a bearing, and the ends can be chamfered. 015-0. Orthwein [4] suggested a designStandard keyways provide added torque capacity and fixed shaft phasing. Cutting an internal keyway can be a challenging task, but with the right method and tools, it can be done with precision and efficiency. 6. 6 mm. S. AUTOMATION & IIOT. Shaft Arbor and Keyseat Dimensional Data American National Standard Keys and Keyways; Standard Metric Keys Keyways for Metric Bores with One Key; Keyway Cutter Hole Keyway Dimensional Data for MIlling Centers and Arbors - ANSI/ASME B94. 5000 2. Machine keys are often the same material as the shaft and other components with which they are used. The advantage of the Js9 tolerance is that the key can be inserted and the gear manipulated without much difficulty. To view the full content, you will. Pre-keyed shafting is an economic alternative to machining shafts yourself while saving time and labor expense. Manufacturing will be based upon DIN 6885 - T1. BS 46 Part 1 : 1958 Square Keys and keyway Dimensions. Made of carbon steel, they have high strength and are better than plastic gears and gear racks for high-load, high-speed, and heavy duty applications. Imperial systems use inches and feet, and these are the standard units. Key and keyway dimensions (control in motion) Keyway shaft coupling hole service couplings modification additional motion control tapered parallel Keyway chart. Author: Melyssa Kotecki Created Date: 4/29/2019 2:23:20 PM. A key is a piece of metal used to connect a rotating machine element to the shaft. The adaptor allows the measuring apparatus to rest on the top surface or outside diameter of the shaft so that the measuring apparatus can be used to measure the centrality of the side walls. This is a +/- band clearance; the value of the. 38 1958. The shaft's diameters that can be used are 3-inch, 4-inch and 4 5/16-inches. For a key to function properly, both the shaft and rotating elements (gear, pulley and coupling) must have a keyway and a keyseat. This is measured at the wall height not the depth of the cut from first contact with the diameter. The centuries-old industry standard shaft-to-hub mounting technique is the key and keyway. Common keystock materials include steel, stainless steel and plated with zinc and are supplied in standard lengths of 12” & 36″ lengths. Another name for a Keyway is a. It wedges the keyThe USA standard recommends maximum stress concentration factors up to 2. ANSI/AGMA 9002-C14. ANSI B18. 2-Piece Clamp-Type Shaft Collars with Keyways are for use on standard round shafts, hard or soft, as well as on thin wall tube or over a split hub. Shallow. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. Standard sizes in diameters from 3/8″ to 2 1/2″. Feather key: This is a parallel key with rounded ends. The Tsubaki POWER-LOCK can also support axial loads, where force is applied through the axis of the shaft-hub connection. It cannot be used as a feather. COPYRIGHT 2003; American Society of Mechanical Engineers Document provided by IHS Licensee=Cummins. There are five main types of shaft keys: sunk, saddle, tangent, round, and spline Sunk Keys Rectangular & square keys. 6. Choose from our selection of shaft keyways, including split-tapered bushings,. 110 mm to 140 mm – 15 mm step. 48 2. The flat key is the standard part, its two sides are the working surface, to transmit the torque. All sizes are in inch units. Interference Fit Bore Tol. Woodruff keys work well near shaft shoulders, where a standard open keyway would create too much stress. 99. In the English system, it is standard practice to dimension keyways. Meaning the keyway in the hub has a rounded contour instead of a rectangular contour. T h i s standard establishes a uniform relation-ship between shaft s i z e and key s i z e for parallel 2 . These shafts have keyways only on the ends, leaving a plain shaft in the center. 8M high quality products and 80 sextillion configurable parts available with fast shipping and low pricing. Shaft and hub keyway dimensions. Get In Touch. 050 mm to −0. 18-8 stainless steel key stock offers a balance of strength and corrosion resistance. These easy-to-adjust components maintain perpendicularity to <0. Check Details. Shaft Diameter: key : Keyway (Shaft : Keyway (Hub) Keyway radius: D: Width: Height : W: H. These devices securely connect drive component hubs to shafts in demanding. It might be worth roughing the keyway underwidth by 1/16" and then profile cut both sides with a nice sharp carbide to straighten. 000. 19-1997. 5000 2. 005, -. The common specification dimension, Key Size, is highlighted. . The shafts revolutions range from 17 to 54 per minute (rpm). They can be made using a standard stock material such as key stock or custom machined to suit the application. Machine Key Comprehensive Guide. It is ideal for overhung or unsupported shafts and is an excellent way to attach items such as mixer paddles and shaft Bore Diameter 1: 1. The keyway in the shaft is in the form Of a semicircular recess with the same Fig. In general, also, we use this type in low-speed applications. 062 0. Depth of keyway is measured at CENTRE. The sizes and tolerances contained in this Standard are intended for single key applications only. Undersized Key Stock Assortments. Figure 2 Keyway Sizes. 4. Keyway dimensionsKeyway sizing chart Metric stepper motor shafts size data tableMetric key keyway dimensions per iso/rtt3 js9 width. Rigid Couplings. based on the table on webpage Factors. Keys and keyways secure the hub and shaft to prevent relative movement between a power transmitting shaft and an attached component. Unless otherwise specified, the shaft keyway is assumed to be standard. 1 mm. 1. 5 Power rating Power ratings of shafts are presented in Tables 2-7. With the optional shim kit, you can cut keyways or slots in shafts as small as 0. pdf. ASME standard B17. Cutting rates will vary by the equipment used, but to give a ballpark speed, a standard machine may run at ~12 square inches per hour. 3 Keys and Keyways P gear d T a b bearings are self-aligning l so act as simple supports FIGURE P9-3 P9-03. Balance the assembly by adding balancing clay to the workpiece. Metric Keyways Dimensions ISO/R773. 1890 0. Woodruff Key Assortments. Keyway Chart. Shaft keyway tapered taper keyways bores wxhParallel key dimensions keyway metric keys rectangular 1958 imperial Keyways keys dimensions metric parallel tolerances engineering fit bs 1972Positive infinite variable gearbox,conveyor chains,couplings,universal. F. If your measuring from the OD of the shaft there is a formula in Machinery Handbook to add that dimension to the half size of the key but don't depend on it for the right depth to cut to. The standard dimensioning of the keyway is like above. Likewise, the keyway height must be 3. Reference The nominal sizes given in ( ) do not conform to the relevant international standard and must not be used in new design. 3 mm. In stock and ready to ship. depth tol. The bending force produced by gears or chains is equal to the net driving force given by. This article provides a table below that shows the standard dimensions (sizes) for square and rectangular cross-section sunk keys. All of the measurements listed on the product pages in inches without the keyway width or depth. Do not operate conveyors without covers. 5 +0. 5 Interference Fits Components can be attached to a shaft without a key or spline by using. Description: : Custom designs with varied tolerances, keyways, non- standard material and bellows are available upon request. ) the shaft sizes are known and controlled. 8 mm. The keyway on the. 3. Total revolutions of shaft = 900x 10 6 revs. (a) end-milled or profile keyway; (b) sled-runner keyway Fig. 3. Stocked in: Steel; Stainless Steel; Specifications. 015. Woodruff keys work well near shaft shoulders and on tapered shafts. 46 : PART 1 : 1958. 4. 1-1943 standard. 19-1997; Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque; Parallel Key. These keys are rectangular or square solid bars that fit into matching keyways machined into the shaft and the component bore. 350 Maximum 2. Keys and keyways BS 46 Part 1 : 1958 Keys and keyway Dimensions-Parallel Rectangular Adve Radius 0. To ensure an adequate factor of safety in the design of a shaft with standard keyway (width, one-quarter, and depth, one-eighth of shaft diameter), the former Code for Transmission Shafting tentatively recommended that shafts with keyways be designed on the basis of a solid circular shaft using not more than 75 percent of the working stress. For example, Gear drives, Pulleys or Sprockets are connected securely using keys to the power transmitting shaft. Notes: n Tolerances for bore and keyways are found in Engineering Data section (pages ED-10 and ED-11). and bending for range of shaft diameters from 10 mm to 500 mm as per standard sizes. Depends on application and cost. Combine a gear and. . AUTOMATION & IIOT. any shaft from 1. 46 : Part 1 : 1958 DLMENSIONS OP TANGENTIAL KEYS AND KEYWAYS. 5/16 to 7/16. Drive Type Fastenings without Taper Action; Parallel Keys, Keyways, Deep Pattern. is very difficult to write one universal bore and keyway standard to address the many combinations. 414 Maximum 2. = 55 MPa for shaft without keyway = 40 MPa for shaft with keyway . Cut keys to custom lengths. Do not chamfer setscrew hole, deburr with a file. Standard keyway dimensionsStandard shaft sizes key bushing table qd non bore keys shallow range gates includes specific each also Keyway chartShaft and hub keyway dimensions. The standard lengths for shafts are 5m, 6m, and 7m, but they are usually taken as 1m to 2m. Over Width, W Height, H Size, bxh 1 1/4. S. 002 inch for keyseat length up to and including 4 inches; 0. The saddle keys are divided into two categories: Flat saddle key; Hollow saddle key; Flat saddle Key-Overview. The following tolerances for maximum lead (due to angular displacement of keyseat centerline from centerline of shaft or bore and measured at right angles to the shaft or bore centerline) of keyseats in shaft and bore are specified: 0. 000 / +0. ISO/R 773:1969. Standard Metric Keys & Keyways for Metric Bores with One Key • Couplings All Types (Page 1 of 2) Metric Key & Keyway Dimensions Per ISO/R773 – Js9 Width Tolerance Key & Keyway Dimensions – Millimeters Falk Coupling Hub Keyway Dimensions – Inches Shaft Diameter “D” Key Size Nominal Keyway Width Hub “W” Keyway Depth. Tapered Gib Keys. (2000+HP) shafts had their keyways worn to the point the shaft needed to be turned from solid 4140 anew. BS 46 Part 1 : 1958 Square Keys and keyway Dimensions. Keyway shaft roymech tolerance Straight-sided splines for cylindrical shafts with internal centering — Dimensions, tolerances and verification. Ultimate tensile strength 580MPa, Yield stress approx 300 MPa. 2 mm. Shaft /Hub/keyway material (BS EN 10083 C45 normalised. Undersized Machine Key Assortments. Drive shaft Design, key and Keyways. The shaft may be hollow or solid. keyways in the shaft members than to keyways in coupling hub bores. These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. Metric – Rectangular B. The saddle keys are classified into two types, they are. Set screws and pins can also work as an alternative to the keyed joint. 75 inches (19. Metric standard parallel keyway and key sizes shaft diameter (mm) keyway (mm) key (mm)*. 42000 KN/m2 for shafts with no allowance for keyways. Height. D = Shaft Diameter W = Width L = Length K s = Service Factor K a = Application FactorANSI-AGMA 9002 defines standard bore and keyway dimensions for shafts dimensioned in inch units, and ANSI-AGMA 9112 defines standard bore and keyway dimensions for shafts dimensioned in metric units. Keyway Dimensions. The keyways correspond to the ASME USAS B17. Turn ground and polished shafting is better than standard shaft because it provides a much easier installation for bearings, collars, sprockets, and other accessories. BOTTOM OF SHAFT TO BOTTOM OF KEYWAY. The value of standard shaft diameter is 66 mm. This key seems undersized on both counts. 3/32" key depth (standard square keystock size for the shaft is 3/16") 1044 stress proof steel series, 303. 5020 2. 3). Page 1 of 3. When a keyway is damaged, cut a new, wider one. While popular on external shaft keyways, milling is much less popular for cutting the inside. Lots of times it's a pin or a bolt . Here we can calculate rigid connections, namely the pinned, keyed, splined and flanged ones. . 6 in. These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. The slot is defined as a keyway or a. Often times you can kiss the key itself with a file to make it a nice fit. 2. 002 -0. 219 (c) (5) (ii) The vertical clearance in passageways between the floor and power transmission beams, ceiling, or any other objects, is not less than five feet six inches (5 ft. This standard covers the size, type and tolerances of parallel and taper keys and keyseats, and their relationship to shaft diameters and bore diameters. Keyway is a recess in the shaft and hub to accommodate the shaft key. 14 mm. Shaft Adapters are designed to modify, extend or repair an existing shaft and provide a fully machineable male output shaft with minimum effort and expense. A keyed joint is used to ensure orientation or restrict rotational movement between parts, as in the case of joining a shaft with a coupling. The extra 4 inches × 3/8″ high key stock. 1. Steel Clamp-Type Shaft Couplings with Keyways. Specification for metric keys and keyways –. clearance fit bores with set screws. 1265 0.