2180 Corporate Lane, Suite 104 ~ Naperville, IL 60563 USA Phone (630) 596-9000 Fax (630) 596-9002 Keyway AGMA 9002-A86 Inch Bore and ANSI B17. 5 times the shaft diameter to ensure a good load distribution over the entire key length when the shaft becomes twisted when loaded in torsion. 030: 0. + 0,030 ; yg 0 - 0 0,030 k 0,015 0,012 1,8That combined amount of clearance forgives a few thousandths of off-centeredness to a shaft keyway. They have a square or rectangular cross section. 3D Printing & CAD. Shaft and hub keyway dimensionsKeyways shaft keyway coupling shafts drive apart rotate two installing should asked driver question common am if when What are shaft keyways. One could have skipped the step. 1 The two standard keyway ends for parallel keys. It is, therefore, keyways are required both on the shaft as well as on the hub of the mating element. All Keyways are parallel and to British Standard 46: Part 1: 1958, with the exception of those marked* which are shallower. 48 products. 75 inches (19. 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. and bending for range of shaft diameters from 10 mm to 500 mm as per standard sizes. Regular. A key is a piece of metal used to connect a rotating machine element to the shaft. 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. KeyWay /Key Dimensions. It might be worth roughing the keyway underwidth by 1/16" and then profile cut both sides with a nice sharp carbide to straighten it up. ASME Code states that for shaft made of a specified ASTM steel: Ss (allowable) = 30% of Sy but not over 18% of Sult for shafts without keyways. 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. 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. Height. Haven't seen a standard key or a woodruff key used as a shear point. 2(w/d)-1. pdf. In reply to #10. Choose from our selection of shaft keyways, including split-tapered bushings,. --Satyanarayan Gangaram Pitroda Addeddate 2013-09-10 07:34:16Standard Calculator Bore Size. Specifications Met. The shaft may be hollow or solid. Shaft Keys 101 | Machine Design. b x h 1 x D. Install them in keyways to transmit torque from shafts to gears and other components. All keyed Shafting is guaranteed to fit on a bearing, and the ends can be. All hubs supplied standard with one set screw. What is the purpose of a keyway in construction?Securing a belt pulley to a drive shaft often seems like such a routine task, that engineers and mechanics can easily overlook some of the selection and installation factors required. All keyed Shafting is guaranteed to fit on a bearing, and the ends can be chamfered. 3 mm) in diameter with the standard bar clamp. Metric External Table Chart Thread Designations Sizes M 1. Using shape optimization by providing chamfer and fillet at corners, it is shown that. ASME standard B17. The prole keyway is cut by an end-mile while the sled-runner keyway is cut by an ordinary milling cutter. Standard keyways provide added torque capacity and fixed shaft phasing. Key. These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. 1910. 000 mm to +0. 251 +0. ASME standard B17. 19-1997; Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque; Parallel Key. --keyway dimensions Keyway sizing chartDimensions standard keyseat keyway shaft shafts diameter nominal. The maximum stress in the standard metric shaft is 25 percent greater. Key strength and steel analysis entering into the makeup of stock for keys is not within the. To view the full content, you will. Keyways play a crucial role in mechanical systems, enabling power transmission between shafts and other machine elements. 4 3 3 11 12 4 1. Rigid shaft couplings are available with or without keyways in one- and two-piece and set screw designs. This specification includes index tolerances for multiple keyways. 2-1967 Specification for metric keys and keyways – Parallel and taper keys BS 4235. The center of the keyway is typically located 1/3 of the. 4 2. 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. The gib head makes them easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. The strength in torsion, of shafts made of ductile materials are usually calculated on the basis of the maximum shear theory. 38 2. 025 2 0-0. 2 Cross-section of prismatic part of parallel key-way, the coordinate system is placed at the shaft axis. Depth at forward end. The keyways are dimensioned for use with a stock key class 2 in order to get a tight fit combination. pdf Shaft Design for Problems 9-6, 9-9. Standard and metric keyway broachesTable aii-12. Recommended ANSI Standard Keys and Keyseats Design per. 25 mm to 60 mm – 5 mm step. 00” in dia. The bending force produced by gears or chains is equal to the net driving force given by. When a keyway is damaged, cut a new, wider one. The information contained with ANSI/AGMA 9002-A86 did not necessarily agree with some commonly used specifications. All dimensions are in inches. 13. N = Number of splines. 004-0. [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. e. 0mm metric, standardShaft standard key sizes rectangular gates keys diameters most non std readily available Chart keyway torqueKeyway metric key dimensions standard keyways keys bores shaft hub depth iso diameter engineering table edge width millimeters. 15. Parallel keysKeyway shaft roymech tolerance Shaft standard key sizes rectangular gates keys diameters most non std readily availableParallel metric keys and keyway dimensions. Unless otherwise specified, the shaft keyway is assumed to be standard. These easy-to-adjust components maintain perpendicularity to <0. Posted on February 1, 2023 in Industry Formulas. Email: sales@usarollerchain. 25. 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. For use on standard hardened round shafts, Shaft Adapters are precision machined, non-marring, easy to adjust, with high clamping power. 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. e = 1-0. 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. . 2515 0. Shaft Diameter. 5000 2. Shaft and hub keyway dimensions. Ann from the top of the shaft, the keyway is shown. 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. Transmission shafts standard sizes or lengths (according to steps). 000 Keyway Depth ( t ) All sizes +0. 000 so that there is no. The second is a P9 tolerance. The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. 1 mm) in diameter. the overhang distance at the nut end so the prop tightens on the taper. Metric module, side fit. We stock pre keyed shafting in many diameters, including metric diameters, with standard keyways. depth tol. Check Details. Dimensions: Shaft Diameter (A): 3-7/16" Keyway Width (B): 7/8" Keyway Depth (C): 7/16" Shaft Material: 1018 Steel; Phone: (407) 347-3519 Email: sales. The flat key is the standard part, its two sides are the working surface, to transmit the torque. %PDF-1. The introduction of a DIN or ANSI standard keyway into a shaft normally reduces the shaft radius by 20 to 25%, and often as much as 50%. 012: 4: 0 -0. Inspection methods for straight and tapered bores and. Referencing Figure 1, the keyway dimension is W x T 1. 6. ANSI B17. 3 6. Manufacturing will be based upon DIN 6885 - T1. BS 46 Part 1 : 1958 Square Keys and keyway Dimensions. 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. REFERENCE DEPTH. These shafts have keyways only on the ends, leaving a plain shaft in the center. Using a hexagon socket wrench (DIN911) gradually tighten the grub cap screws in accordanceProduct Description. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. 2. High Quality Keystock from USA Roller Chain and Sprockets. In the English system, it is standard practice to dimension keyways. 4235 : PART 1 : 1972 Imperial – Rectangular B. Explanation of the constructions of tangent keys is not an easy thing. It cannot be used as a feather. If a key is to be fitted place it in the shaft keyway before fitting the bush. 1/2 to 3/16. A key is a machine element that is used to join a rotating machine element to a shaft. Special keyway configurations. The common specification dimension, Key Size, is highlighted. Gear Products and Suppliers | Gear Knowledge Menu. Schlage Keyway Types. Parallel keys are the most widely used machine key. 3/64. Depth of keyway is measured at CENTRE. Tapered Gib Keys. 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. ISO. The gib head makes them easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. Parallel Metric Keys and Keyway Dimensions - Roy Mech. We stock pre keyed shafting in many diameters, including metric diameters, with standard keyways. The slot is provided in the rotating shaft or in the hub or both of them to insert the key known as keyways. 6 - 8 - 10 - 12 - 14 - 16 - 18 - 20 - 22 - 25 - 28 - 32. The second is a P9 tolerance. In stock and ready to ship. These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. ** earcneaear r l c oFr Information DIN 6885 page 1 and page 2 differ mainly in the radial position of the parallel key (see sketch). 424 Minimum 2. 2-1967. Inspection methods for straight and tapered bores and. 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. Unless otherwise specified, the shaft keyway is assumed to be standard. Nearly every shaft diameter has a corresponding standard keyway width and depth – this calculator helps you find it. Bore Diameter: 1. 18% of the ultimate strength in tension for shafts18% of the ultimate strength in tension for shafts without keyways. It helps to transmit torque. In this comprehensive guide, we will discuss seven popular internal keyway. Height. 94 inch. 3mm 2. The taper is 1/8” per foot. You can specify 2X on the features of size for your keyway. Key and keyway dimensions (control in motion) Keyway shaft coupling hole service couplings modification additional motion control tapered parallel Keyway chart Standard shaft sizes key bushi. 5. D. They are called “keys” because they lock a component to the shaft by means of a corresponding keyway in a shaft. Keyway (Hub) Radius r. Check Details. 5 inches (38. One from our supplier is requesting that shaft keys and keyways be toleranced on our prints in such a way that the keyways would *always* be bigger than the keys. Woodruff Key Assortments. Mechanical & Motion Systems. 16 1. 05 0Unlike clearance fit hubs (which must have either a keyway, square bore, or spline to keep them from rotating), interference fit hubs also have the option of not necessarily having a keyway (or keyways) to transmit shaft toque (though many still will). 6 - M 18. For more information, to get a formal quote on 2-15/16" keyed shaft, or for pricing on any of its accompanying components/ accessories please contact us and we will be happy to assist you. ASTM Standard. 2 To facilitate the cutting of keyways on the shaft and in the hub, they may be located 180” apart, by agreement between the interested Parties. This type of shaft has a tighter tolerance, nicer finish, and has been polished. TruKey® Shafting from Keystone is designed to provide the straightest, most accurate keyed shafting, in the industry. com. 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. pdf Gates belts, hoses, and applications: standard & non-standard. Specification. Keyway is not made for holes of less than 12 mm. 3 N) When I calculate with this data I reach a safety factor of 1,08. Rectangular-faced keys are used for larger shaft diameters and square keys are used for shafts smaller than 6. The shaft is made from AISI 1020 cold-drawn steel. Shaft and hub keyway dimensionsKeyways shaft keyway coupling shafts drive apart rotate two installing should asked driver question common am if when. One of the following methods should be used to specify keyways: Metric: WxH Key W x T2 Keyway British: WxH12 Key W x H Keyway ISO Standard-mm Imperial -Inches 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. TruKey® Shafting from Keystone is designed to provide the straightest, most accurate keyed shafting, in the industry. The keys are square or rectangular. Although similar in principle to BS 46-1, for inch. Parallel keys are the most widely used machine key. Keyway misumiKey and keyway dimensions (control in motion) Keyway sizing chartMetric key keyway dimensions. The length of the exposed shaft is approximately 7 inches. Stocked in a variety of materials. Linear motion. exceptions are indicated on the respective standard sheet. Old JIS (Class 2) Standards Unit [mm] Hole diameter b2 t2 Key size b×h; Standard size Tolerance(E9. For more information, to get a formal quote on 3-7/16" keyed shaft, or for pricing on any of its accompanying components/ accessories please contact us and we will be happy to assist you. WIDTH. No welding required. 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. Box 12086 Omaha, NE 68112-2086A Key is used on a shaft keyway to retain mechanical power transmission components such as gear drives and pulleys to transmit power. 1875 0. Max. 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. These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. Keyways cut in certain area’s on the shaft. In today's video I show you everything you need to know about making Splined shafts and adding keyways . 000 for all standard keyways BORE, KEYWAY & SET SCREW INFORMATION MECHANICAL P. These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. 0:00 Intro00:10 Making spline part4:12 Adding shafts5. That is, for a 1/2" key the depth of the keyway would be . Keyway (Shaft. That combined amount of clearance forgives a few thousandths of off-centeredness to a shaft keyway. STAFFORD STEEL CLAMP-TYPE SHAFT COUPLINGS WITH KEYWAYS: DIMENSIONS: ONE PIECE STEEL: TWO PIECE STEEL: KEYWAY: BORE. Whereas the P9 tolerance is a press fit tolerance. The keys are square or rectangular. 1 Square Keyway Tolerances Minimum 2. the depth of a keyway is an important taken every Shaft keyway depth calculatorKeyway misumi. Nominal Shaft Diameter Nominal Key Size Normal Keyseat Depth Over Up to and Incl. The shafts revolutions range from 17 to 54 per minute (rpm). 000 / +. 060 +0. Shaft (Arbor) Keyway Dimension Size Data - ANSI/ASME. 120. Key width: 45mm. Keyway Sizes for Hole Diameters (Table Below) Unless otherwise specified, a hole is drilled according to the old JIS (class 2) standards. 3. Shaft and hub keyway dimensions. Also calculated are the overall measurements for shaft and bore, as well as the chord height. International Standard ISO 3117 was developed by Technical Committee ISO/TC 14, Shafts for machinery and accessories, and was circulated to the member. All of the measurements listed on the product pages in inches without the keyway width or depth. 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. Key height: 25mm. comShaft end diameter 180mm. Key Stock is cold drawn to exacting tolerances with sharp corners, perpendicular and parallel sides, and smooth, bright surface finishes. 000 +0. 1. Keyway Dimensions. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. If the enduser is using oversize plated keystock, then the properly centered keyway is more important. 6 %âãÏÓ 105548 0 obj >stream hÞ¼“moÛ6 Ç?A¿ _¦ ‚¿ ?Å@aÀŽë¦[šu±ÛdMó‚–N ŠRHÚ ûéw¤ ¯ ¶,y3H" ÷@ ¿ ô’þH$bÐK ‰HÓ4J©HÇã. Finished Striaght bores for standard AGMA Class 1 Clearance fit. However, designers tend to forget that other important. 02 to 118 inch. Make sure 'lock-tight' is used on the set screw or make the screw long enough to use a nut to wedge it tight for vibration resiistance. The depth of the keyway weakens the shaft. Get a quote +61 7 3271 5424. Choose from our selection of shaft keys, including rounded machine keys, machine keys, and more. And the dimension is added from the bottom of the keyway to the bottom perimeter of. The bottom portion of the Woodruff key fits into the circular keyway in the shaft. Keyway dimensionsMetric key keyway dimensions per iso/rtt3 js9 width Inch keyway chart ansi agma shaft key width b4 dimensions diameter nominal reference motor electricKeys keyway metric standard keyways sizes engineering shaft key parallel square fit fits mechanical data rectangular british limits figure. They can be used in transmitting motion and power between two shaft in the same or in opposite directions. Related terms:. It is noted that this is equivalent to a stress concentration. 000 Standard Setscrew Locations If one setscrew is furnished the location. is very difficult to write one universal bore and keyway standard to address the many combinations. = 55 MPa for shaft without keyway = 40 MPa for shaft with keyway . Keyway-and-key-size-dimensions. The 22 x 14 suggestion makes a lot of sense, unless prevented by thin-walled hubs and/or shaft size issues. Schlage uses CNC milling complex keyway shapes to mechanically prevent some non-OEM keys from entering or operating a lock. The saddle keys are classified into two types, they are. NOMINAL SHAFT DIAMETER BOTTOM OF SHAFT TO BOTTOM OF KEYWAY WIDTH. The main reason of failure of shaft and keyways in shaft-hub connection is the shear stress, so the focus is done on it. The following tables show standard dimensions for keys and their grooves. Keys and keyways. d. 0005 inch per inch of length for keyseat lengths. Standard keyways provide added torque capacity and fixed shaft phasing. We stock pre keyed shafting in many diameters, including metric diameters, with standard keyways. d. Welcome Location Transmission Bushes Pulleys Belts Vector Belts Roller Chain & Sprockets. 28. Slightly. The introduction of a DIN or ANSI standard keyway into a shaft normally reduces the shaft radius by 20 to 25%, and often as much as 50%. Pre-keyed shafting is an economic alternative to machining shafts yourself while saving time and labor expense. I am designing a part that has two keyways 180 degrees apart on a single large diameter shaft. shaft diameter Dimension d Allowance (h9) Allowance dimension (D10) 2×2 2 0-0. 3 mm) in diameter with a standard bar clamp. 18 1. Check out our shaft keyway size chart as well to help you identify your needs. 4. From the right side of the shaft total diameter is given with tolerances. The table above shows the dimension of the keyway / keyseat for each available hub bore diameter. Mount the adapter to the workpiece shaft using a full key in the shaft keyway and fill the half-key void in the opposite side of the adapter with a half-key (see Figure 6-22 B). That's also a condensed version. finished steel stock for parallel keys. . 8mm 2. Unit 2 design of shaft. 3) of the diameter of the shaft, in which case the thickness of the key (T) becomes ?40 (0. Specification for metric keys and keyways –. Inch (ANSI/AGMA 9002-B4) Metric (ISO/R773) corresponding keyways for Metric shafts are listed below in Table 2. Keyway metric dimensions key iso tolerance js9 r773 width per depth hub t2 height radius text mill question answered hasnSolved 5. Install them in keyways to transmit torque from shafts to gears and other components. Quality drop forged yokes coupled with relubricable needle bearings. 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. 3). Be wary of the hub wall thickness. Get In Touch. Hollow saddle keys. KeyWay. Step Machine Key Stock. Standard Keyways: (Used on all of our shafting) “Plain” Shafting available. For special purposes, stainless steel shafts usually of steel designation 304 or 316 shall be used. The key and key seat cross section are ISO standardized. • Machine elements such as gears, pulleys (sheaves), flywheels, clutches, and sprockets are mounted on the shaft and are used to transmit power from the driving. Straight keys, with a square or rectangular cross section, are the most common type of key. 260". This is useful when the hub/pulley has to slide axially on the shaft to. Figure 1 - Keyway and Key Size Dimension Reference. A single setscrew bearing on a shaft is bad practice and will not. Nominal Bore Diameter Clearance Bore Interference Bore Keyway “T”-DIM +0. Likewise, the keyway height must be 3. The common KeywayAGMA ASA Keyway and Bores Design Data including dimension and tolerances. Shaft Diameter: key : Keyway (Shaft : Keyway (Hub) Keyway radius: D: Width: Height : W: H. 09/09/2014 10:45 AM. Woodruff keys work well near shaft shoulders and on tapered shafts. Tapers - charts and how to measure. The automatic centering V-base is quick and easy to set up and clamps on any shaft from 1. 010 / -. Standard Keyway Dimensions Shaft Diameter Set Screw Width Depth Up through 7/16" 8-32 3/32 3/64. 2. based on the table on webpage Factors. Common keystock materials include steel, stainless steel and plated with zinc and are supplied in standard lengths of 12” & 36″ lengths. Cut it to length to create the machine key you need. 3) Keyway fillet radius to be specified by customer. This is an undersized clearance. Rectangular or square parallel keys. It is also possible to make a calculation. Keyways Index KeyWay & Key Dimensions. 1-1943 standard. It might be worth roughing the keyway underwidth by 1/16" and then profile cut both sides with a nice sharp carbide to straighten. Keys are inserted inside the shaft and hub keyway to ensure the working of the complete system. 3) Keyway fillet radius to be specified by customer. 0Rotary Shafts - One End Tapped and Keyway Grooves. Hex, round, and step profiles are available to mate. 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. Ultimate tensile strength 580MPa, Yield stress approx 300 MPa. 000. Check Details. 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. Just seeking opinion on using a true position on a key way slot on a round shaft. Many keyways are milled directly into a shaft or broached into the corresponding bored holes. 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. BS 4235-2:1977, ISO 3912-1977: Specification for metric keys and keyways - Woodruff keys and keyways. 110 mm to 140 mm – 15 mm step. Coping with foreign bore and keyway standards | Machine Design. If the enduser is using oversize plated keystock, then the properly centered keyway is more important. 25. 4mm 8mm 2mm 9mm 12mm 11mm 4mm 4mm 14mm 15mm DIN 7154, H7 Metric. Rectangular-faced keys are used for larger shaft diameters and square keys are used for shafts smaller than 6. 1) has a stress concentration factor of 3 [42]. +40 0. 1/2. 125 0. Feather key: This is a parallel key with rounded ends. 6 6. Combine gears with different numbers of teeth to change speed and torque in your assembly. These tables can be used to find the approximate shaft diameter for various service conditions. 16-0. Page 1 of 3. Unless otherwise specified, the shaft keyway is assumed to be standard. Same deal if using a pulley/shaft/sprocket with a taper lock hub. D,d Depth. 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. 005, -. keyways in the shaft members than to keyways in coupling hub bores. Overall length 5’’. Do not chamfer setscrew hole, deburr with a file. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. Referencing Figure 1, the keyway dimension is W x T1. 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. It's a way of using the standard to control a manufacturing process with a drawing. 350 Maximum 2.