W x T2 Keyway ISO Standard — mm Snart Dlameter WI dth Groove dimensions keys DIN 6E-ga Shut 1 (With • 1972. 02 to 118 inch. 3 6. Overall length 5’’. Keyway Bore Diameter Size Bore Reference -0. e. Keyless hubs are often specified for high speed applications to improve the balance of the assembly and to secure the hub to the. 6 mm. 53. Although similar in principle to BS 46-1, for inch. Shaft Diameter. Unless otherwise specified, the shaft keyway is assumed to be standard. Rigid Couplings. 3. Fillet radii comply with AGMA 9002-A86. . 350 Maximum 2. Metric Standard Parallel Keyway and Key Sizes Shaft Diameter (mm) Keyway (mm) Key (mm)* From To Width (W) Depth (h) Width (W) Depth (T) 6 8 2 1. The second is a P9 tolerance. Inspection methods for straight and tapered bores and. B. It is desired that there is a minimum amount of rotational play. Shaft (Arbor) Keyway Dimension Size Data - ANSI/ASME. 0:00 Intro00:10 Making spline part4:12 Adding shafts5. Clearance Fit Bore Tol. LargerRuland’s variety of standard shaft collars and couplings allows designers working with motors or at a motor manufacturer to specify the right component based on the application requirements. 5000 2. 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 121) Unless specified by the customer: 2) Actual shaft fit will vary depending on - Series S couplings supplied with actual shaft diameters. 1. 99. It is a rotating member, in general, has a circular cross-section and is used to transmit power. Use the keyways with machine keys to transmit torque to gears, sprockets, and other keyed components. Re-design the shaft shown below to be a uniform,Keyway chart Shaft standard key sizes rectangular gates keys diameters most non std readily. The keys are square or rectangular. D. The advantage of the Js9 tolerance is that the key can beKeys shaft rectangular types key chart hub designs tapered machine selection5/8" od keyed shafting with a 3/16" full keyway Metric key keyway dimensions per iso/rtt3 js9 widthMetric key keyway dimensions. We can provide keyed shafts in any length up to 20 foot. A key cutter, also known as a keyseat cutter, keyway cutter, or woodruff cutter, is a versatile tool that can be used to cut several different types of keyways. . 3. 003, -. The Reverse, numbered, Primus, Everest, and Quad key. The connection level key is placed in the keyway of the shaft and shaft parts. Woodruff keys are usually with splines and the L-LOC spline clamping feature, see section 7. Material Assignment. Hollow saddle keys. The gear can then be fitted onto the shaft and the keyway on the gear will fit over the key, inserted in the shaft. 0mm to 26. powerhound (Mechanical) 10 Mar 08 23:14. Specification. 3 mm) in diameter with the standard bar clamp. The deviations are less than the basic size. AUTOMATION & IIOT. JHG. See ANSI/AGMA 9112--A04 for metric bores with metric keyways. Keyway Depth. Where a key is to be used it should be side fitting with top clearance. Standard Metric Keys Keyways for Metric Bores with One Key; Keyway Cutter Hole Keyway Dimensional Data for MIlling Centers and Arbors - ANSI/ASME B94. potrero, Regarding the alignment of the slots, there is a "simultaneous requirements" rule in GD&T. If using a set screw to secure a pulley etc to a shaft you should use two spaced at 45 degrees apart. Keyshaft keyed shaft, diameter 1 7/16 in, keyway 3/8 in x 3/16 inKeyway parallel keyways metric t2 wxh bores Keyway keyed keyways boresGates belts, hoses, and applications: standard & non-standard shaft key. 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. To help, we’ve put together the following keyway cheat sheet for. 120. The shaft key can fix, only if the shaft has a key seat and the hub has a keyway. 19-1997 1, the Metric key size is W x T. Since most inch shaft Tolerancing is controlled by NEMA and/or AGMA, (both standards agree up to 6. Home; Metric Keyways Index page; Parallel Keys and keyway Dimensions; Parallel Keys and keyway Dimensions to BS 4235-1:1972 KeyWay & Key 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. 4. They have a square or rectangular cross section. Standard keyways for shafts are typically located along the length of the shaft with the centerline of the keyway being parallel to the axis of the shaft. 1045 Pre-Keyed Precision Ground Shafting, is a 1045 steel round that has been turned, ground and polished to a 32 RMS surface finish with a pre-machined full length keyway cut to ANSI standards. f7 (shaft) tolerance range = −0. +35 0. 5020 2. 2-1967 Specification for metric keys and keyways – Parallel and taper keys BS 4235. 4 9. Feather key. 6 in. Check Details. 5 +0. The common specification dimension, Key Size, is highlighted. Moore. Shallow. It might be worth roughing the keyway underwidth by 1/16" and then profile cut both sides with a nice sharp carbide to straighten. As with all functions of the Machinist's Calculator, linear values can be. Shaft Keys 101 | Machine Design. Further, shafts, along with any other required drive elements, can be made smaller once the keyway notch factor is removed. A key is a piece of metal used to connect a rotating machine element to the shaft. The following tables show standard dimensions for keys and their grooves. This type of shaft has a tighter tolerance, nicer finish, and has been polished. 19-1997; Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque; Parallel Key and Taper Keys. We can provide keyed shafts in any length up to 20 foot. d. Depends on application and cost. W width. The invention is directed to an adaptor device suitable for use with a measuring apparatus to determine the centrality to the centerline of a Woodruff keyway in a shaft. The second is a P9 tolerance. Inc. the depth at the side, but in the metric system the keyway is dimensioned by the width and the depth measured from the raduis of the shaft to the center of the keyway. It is a standard form of key and maybe either have a rectangular or square cross-section. Do not chamfer setscrew hole, deburr with a file. Machining of square shafts with rounded ends (with or without keyways) Other machining available upon request per prints provided (drill, tap, threading) For Keyway MM Dimensions – see the table at. Keyway dimensionsKeyway sizing chart Metric stepper motor shafts size data tableMetric key keyway dimensions per iso/rtt3 js9 width. The shaft key is a machined element used for connecting the transmission shaft to rotating parts like gear. 360 Minimum 2. 062 0. Tapers - charts and how to measure. 1250 0. These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. Width b: Depth : Radius R: Nom: Tolerance Class: Shaft t 1: Hub t 2: Normal: Close: Shaft N9: Hub Js9: Shaft & Hub P6:. For more information, to get a formal quote on 2" keyed shaft, or for pricing on any of its accompanying components/ accessories please contact us and we will be happy to assist you. BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements. Keyway metric key iso dimensions standard keyways keys r773 pdf bores shaft hub depth diameter standards engineering table edge. The following table includes standard rectangular shaft key sizes for shaft diameters ranging from 5/16" to 9": Standard rectangular key stock is readily available from most Gates Industrial Distributors. it is also important to go with a well-accepted industry bore standard so the. The key prevents relative rotation between the. In order to transmit rotation from the shaft to the hub of gear wheels, pulleys, sprockets, couplings, flanges and other coaxial parts, rigid and frictional joints of various types are used. That combined amount of clearance forgives a few thousandths of off-centeredness to a shaft keyway. (i. Cutting a standard keyseat in a shaft and in a gear or sprocket will give a nice tap fit for the key. Nearly every shaft diameter has a corresponding standard keyway width and depth – this calculator helps you find it. 95 6. Shaft standard key sizes rectangular gates keys diameters most non std readily availableMetric key keyway shaft standard keyways falk keys bores resources industrial Shaft and hub keyway dimensionsKey allen hex wrench keys set bolts types alley supply competitive prices details alibaba fairwell. Key height: 25mm. This type of key is used in areas where frequent removal of the key is necessary. Keyway metric key dimensions standard keyways keys bores shaft hub depth iso diameter engineering table edge width millimetersWoodruff ansi fasteners nominal Woodruff ansi metric keyway fasteners nominalParallel dimensions metric keyway key keys 1972. Title of Legally Binding Document: Parallel Keys and Keyways Number of Amendments: 2 Equivalence: Superceding: IS 2710 Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New--Jawaharlal Nehru Invent a new India using knowledge. The one edge of the shaft is completely inside the shaft side. 2515 0. The first is Js9. 48 products. Note: The code "SR" on the included key. As bushing bores approach the maximum recommended diameters, keyway depths are reduced in order to extend maximum bores as much as. Keys and keyways are used to transfer torque from shafts to holes or vise versa. 48 2. scope: This standard establishes a uniform relationship between shaft size and key size for parallel and taper keys retaining similar basic sizing as found in the withdrawn B17. Cutting an internal keyway can be a challenging task, but with the right method and tools, it can be done with precision and efficiency. 18% of the ultimate strength in tension for shafts18% of the ultimate strength in tension for shafts without keyways. Keys standard metric keyways mechanicalMetric keyway shaft depth reference dimensions diameter iso r773 width Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k keyKeyway metric dimensions keys. 4mm 8mm 2mm 9mm 12mm 11mm 4mm 4mm 14mm 15mm DIN 7154, H7 Metric. The gib head makes them easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. While ubiquitous and intuitively easy to understand, the key and keyway is a remarkably ineffective technology. Because this key stock is slightly larger than standard key stock, keys will fit tightly in worn keyways. This is why you remain in the best website to look the incredible ebook to have. Datums are A and B in the centres at each end. Description: Designed for aligned shafts, the 1-Piece Clamp-Type Coupling makes two shafts function as one. 9-11, and 9-12 Figure 9. 1910. 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. 6. 18 1. 19-1997. EN Standard. 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. 0000 /. 062 0. Title: keyway dimensions. Click here to purchase the full version from the ANSI store. Standard and metric keyway broachesTable aii-12. 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. This is a +/- band clearance; the value of the tolerance is equally oversized or undersized. Explanation of the constructions of tangent keys is not an easy thing. Unless otherwise specified, the shaft keyway is assumed. Taper Keys/Gib Head Keys. 5 inches (38. 3mm 2. ASME standard B17. metric bores with metric keyways, or shaft keyseat tolerances. . This shaft key installation necessitates the use of a keyway on the hub but does not need the use of a keyway on the shaft. The key prevents relative rotation between the two parts and may enable torque transmission. Combine a gear and. Select your units as required. Rounded Machine Keys. 002+0. Ruland manufactures them from select North American bar stock in 2024 aluminum for lightweight and low inertia, 1215 lead-free steel for general purpose use, and 303 stainless steel for high corrosion resistance. 38 0. 1. 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. He explains that for specifying keyways, it must be noted that there are very well established standards for dimensions, which can be found in Machinery’s Handbook, or ANSI B17. 25 - M 1. Rectangular-faced keys are used for larger shaft diameters and square keys are used for shafts smaller than 6. 120. . G&G Manufacturing Company 4432 McKinley Street P. . Flat Key Square Key Woodruff Key . The table above shows the dimension of the keyway / keyseat for each available hub bore diameter. Key Stock is cold drawn to exacting tolerances with sharp corners, perpendicular and parallel sides, and smooth, bright surface finishes. 010 / -. 2. 5 3. Step Machine Key Stock. Install them in keyways to transmit torque from shafts to gears and other components. The automatic centering V-base is quick and easy to set up and clamps on any shaft from 1. 46 : PART 1 : 1958. Title: Microsoft PowerPoint - 01_ShaftThe shaft and spinning machine component must have a keyway and a keyseat, which are slots and pockets where the key fits, for a key to work. Check Details. 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. It helps to transmit torque. Eliminates need for complete shaft replacement. What does H8 tolerance mean? H8 (hole) tolerance range = +0. 00” in dia. Open the catalog to page 11The development of these relations can be found in standard texts. Dimensions: Shaft Diameter (A): 2" Keyway Width (B): 1/2" Keyway Depth (C): 1/4" Shaft Material: 1018 Steel; Phone: (407) 347-3519 Email: [email protected] using a key it should firstly be fitted in the shaft Keyway. Tapered Gib Keys. 5 in (170 mm). Install them in keyways to transmit torque from shafts to gears and other components. 1. Choose from our. Install them in keyways to transmit torque from shafts to gears and other components. Nominal Shaft Diameter Nominal Key Size Normal Keyseat Depth Over Up to and Incl. Shafts with keyways can catch clothing easily. 14 mm. The key and key seat cross section are ISO standardized. The keyway on the. International Standard IS0 3912 was developed by Technical Committee ISO/TC 14, Shafts for machinery and accessories, and was circulated to the member. 4. 2 mm. Standard keyseated shafting,The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. clearance fit bores with set screws. 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 12AMERICAN NATIONAL STANDARD Bores and Keyways for Flexible Couplings (Inch Series) This is a preview of "ANSI/AGMA 9002-B04". Keyseats and Keyways. 020 0. Hollow saddle key. Plastic Gears and GearRacks— 14 1/2° Pressure Angle. We stock pre keyed shafting in many diameters, including metric diameters, with standard keyways. Only informative sections of standards are publicly available. The gib head makes them easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. The keyways are dimensioned for use with a stock key class 2 in order to get a tight fit combination. The keyways correspond to the ASME USAS B17. . Notes: n Tolerances for bore and keyways are found in Engineering Data section (pages ED-10 and ED-11). For use on standard hardened round shafts, Shaft Adapters are precision machined, non-marring, easy to adjust, with high clamping power. Keyway Bore Diameter Size Bore Reference -0. Key strength and steel analysis entering into the makeup of stock for keys is not within the. The gap of the keyway is shown with tolerances again and the semi-gap is shown. Appropriate fits can be established for each shaft size and published in a standard. Straight-sided splines for cylindrical shafts with internal centering — Dimensions, tolerances and verification. Schlage Keyway Types. pdf Gates belts, hoses, and applications: standard & non-standard. The projecting part of Woodruff key fits in the keyway in the hub. * j6, k6, and m6 are used for new standard motor shafts. Install them in keyways to transmit torque from shafts to gears and other components. 001/-0. For shafts, the standard lengths are 5m, 6m and 7m but generally taken as 1m to 2m. 88 Lecture1: Design of Shaft 33. PFEIFER INDUSTRIES, LLC. Clean delicate surfaces inside tubes, pipes, and holes. 001 TIR, allow for the attachment of gears,. The following tables show standard dimensions for keys and their. R R Cutter Run-out. 4. Taper keys with or without gib head and their corresponding keyways. It's a way of using the standard to control a manufacturing process with a drawing. 8M high quality products and 80 sextillion configurable parts available with fast shipping and low pricing. The commonKeyed Shafting 1045 - Key Shaft. Another name for a Keyway is a. 4 mm. 3 mm. finished steel stock for parallel keys. 110 mm to 140 mm – 15 mm step. Likewise, the keyway height must be 3. 2 0. Haven't seen a standard key or a woodruff key used as a shear point. Standard sizes in diameters from 3/8″ to 2 1/2″. 000. O. 1 Shaft Shaft is a common and important machine element. These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. REFERENCE DEPTH. Tony, a 1/4" keyway is standard on 1" diameters. keyways in the shaft members than to keyways in coupling hub bores. With the optional shim kit, you can cut keyways or slots in shafts as small as 0. Variations of machine keys include parallel keys, tapered keys, Woodruff keys, hi-pro keys, and non-rok keys. Most keyways in a shaft are half the height of the key plus . Just enter the size of the key and shaft, then click "Calculate". In stock and ready to ship. 002 -0. 219(c)(4)(i), a projecting shaft end protruding more than one-half the diameter of the shaft must be guarded by non-rotating caps or safety sleeves. 0005 inch per inch of length for keyseat lengths. Check Details. 16-0. The keys are square or rectangular. N = Number of splines. Position on shaft. 13. D,d Depth. The first is Js9. Standard keyway dimensionsKeyway chart Keyshaft keyed shaft, diameter 1 7/16 in, keyway 3/8 in x 3/16 inKeyway slot key shaft keyways. All keyed Shafting is guaranteed to fit on a bearing, and the ends can be chamfered. Also, applications can be in two directions. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. Use the middle of the shaft with bearings and other round-bore components. 8mm 2. 062 0. 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). 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. [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. 5. Top. Linear motion. The maximum stress in the standard metric shaft is 25 percent greater. BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements. Depth at forward end. 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. 000 Keyway Depth ( t ) All sizes +0. Standard keyways provide added torque capacity and fixed shaft phasing. ANSI B18. These devices securely connect drive component hubs to shafts in demanding. 414 Maximum 2. 003-0. In addition to diameter tolerances that are twice as tight as standard keyed shafts, these shafts include a traceable lot number and test report. They can be made using a standard stock material such as key stock or custom machined to suit the application. 46 : Part 1 : 1958 DLMENSIONS OP TANGENTIAL KEYS AND KEYWAYS. 87 inch. 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. This is according the DIN OK. 1) of the diameter of the shaft. Phone: (407) 347-3519. 6 6. 3 h 1 2t t h d c c h b 6. 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 . The Position of the keyway in the shaft and its relation to the Position of the propeller boss shall be as shown in Fig. A Shaft key is a piece of metal used to connect a rotating machine element to the shaft. They’re used in a wide range of industrial and consumer OEM and MRO applications, including: Power transmission. British Standard Metric Keyways for Square and Rectangular Parallel Keys 11 5/16 3/8 7/16 1/2 3/4 3/4 7/8 Nominal Diameter, d 6 1/2. A list of standard keyway and corresponding key sizes for English shafts are listed below in Table 1. Combine gears with different numbers of teeth to change speed and torque in your assembly. rad 10 12 4 4 2. Keyway Dimensions Key Dimensions The inch and metric dimensions here correspond to common values. The end of a keyway has two standard designs, shown in Figure 1. Keys shaft rectangular types key chart hub designs tapered machine selectionStandard keyway size chart Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k keyKeyway sizing chart. You can specify 2X on the features of size for your keyway. 2 MATHEMATICAL FORMULATION AND FE The torsional moment is given by M t~GJ w l ð1Þ Fig. The saddle keys are classified into two types, they are. 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. It is noted that this is equivalent to a stress concentration. There are five main types of shaft keys: sunk, saddle, tangent, round, and spline Sunk Keys Rectangular & square keys. 260". and robotics. It cannot be used as a feather. constitute provisions of this Standard: PAES 305:2000, Keys and Keyways for Agricultural Machines 3 Application Spur gears are used to connect parallel shafts and have teeth formed in cylindrical blanks parallel to the shaft axis. Hub keyway depth is one-half the nominal height of the key and measured from the side corner. Depth of keyway is measured at CENTRE. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. 3 - Square and Rectangular Keys and Keyways: Width Tolerances and Deviations Greater Than Basic Size. I am designing a part that has two keyways 180 degrees apart on a single large diameter shaft. Saddle keys The saddle keys are of the following two types : 1. This is a +/- band clearance; the value of the tolerance is equally oversized or undersized. ) the shaft sizes are known and controlled. Keyway Radius “R”† Over Thru Nominal Min Max Min Max Min Max Hub “W” Over Thru Min Max Min Max Keyways will be furnished with P9 width tolerance only upon request. Variations of machine keys include parallel keys, tapered keys, Woodruff keys, hi-pro keys, and non-rok keys. 5020 2. Keyway Dimensions. 6. Nominal dimension of key b x h. (5). 1 for imperial dimensions and DIN 6885 for metric dimensions. DIN 6885/2 Keyways d b P9/JS9 Hub keyway b P9/N9 Shaft keyway h t1 = d + t2 t2 t3 = d - t4 t4 11 4 4 4 12. Re-design the shaft shown below to be a uniform,Keyway chart Shaft standard key sizes rectangular gates keys diameters most. BS 46 Part 1 : 1958 Square Keys and keyway Dimensions. Standard keyways provide added torque capacity and fixed shaft phasing. NOMINAL SHAFT DIAMETER BOTTOM OF SHAFT TO BOTTOM OF KEYWAY WIDTH. Shaft couplings shall be so constructed as to present no hazard from bolts, nuts, setscrews, or revolving. Manufacturing will be based upon DIN 6885 - T1. It also gives the relation to be observed between the diameter of the shaft and the section of the key. New keyless locking devices offer an alternative for challenging motion applicationsOur 5/8" shaft with keyway will serve your assembly well. Keyway Width ( w ) Over 1/2" to and including 1" +0. A keyway is provided on the shaft and also on the hub or on a pulley to connect together the conjugate parts by inserting the key in between. Shaft keyway keyways bores t2 chains wxh. from the split. The extra 4 inches × 3/8″ high key stock. Unless otherwise specified, the shaft keyway is assumed to be standard. Because they're usually shorter than. Woodruff Key Assortments. 5: 4 +0. Over Width, W Height, H Size, bxh 1 1/4. Metric module, side fit. The key is then tightly fitted. Refer to Figures 4 and 5 and Tables 6 and 7 for recommended setscrew location and size. pdf. 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. 8 4 4 Shaft (Arbor) Keyway Dimension Size Data - ANSI/ASME B94. It is true that these ANSI standards define different products than ISO specs. 251 +0.