The standardization of keys and keyways was first considered by the Engineering Standards Committee (the original name and form of the present B. Cartener Pulley Keyway Key - Square Key Stock 60pc - Keyway Stock, Keyway Tension, Keyway Blank - Keyway Plastic Box - Flywheel Keys - Pump Shaft Key - 1/4 Key Stock - 3/16 key stock. For example, M10 or M10-6g, by default, specifies M10 x 1. All dimensions are in inches. Broach tooling is most often as customized as the workpiece that it will cut. View. Shaft keyed keyway aluminum diameter grainger length motor shafts close. G&G Manufacturing Company 4432 McKinley Street P. . Shaft key standard sizes rectangular gates keys diameters most non std readily available3 ways to convert within metric measurements Metric convert measurement measurements conversions easy way within units ways unit decimal number use. the circular profile will push the key out of the slot, as opposed to a standard key which will need to be pushed axially, or pulled out of its slot. Chain. Key Length DIN 6885. Detail design should be completed using the relevant standards or quality reference sources. 0 2. This standard describes the ISO system of limits and fits for mating parts as it is approved for general engineering usage in the United States of America. 6 8 10 12 17 22 30 38 44 50 58 65 75 85 95 110 130 150 170 200 230 260 290 330 380 440. Standard metric keys keyways for metric bores with one key. - Series EL couplings supplied with Metric series: KM/KML, HM . It is important there-fore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto. 1 Class 1 standards for dimensions and tolerances. 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. 2-1967. Also, as. The keyseat in a shaft for a parallel key. 19-1997; Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque; Parallel Key and Taper Keys. 5. Keyway Bore (inches) Reference Height (d) 1. Metric keyways are dimensioned by width and depth as measured from the radius of the. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and. W is the key width. These simple pieces of metal connect shafts to rotating components to transmit torque while ensuring that the components cannot move relative to each other. ANSI B17. 020 0. Read more…. KEYWAY. The 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. Foreword. Keys and keyways BS 46 Part 1 : 1958 Square Keys and keyway Dimensions all dimensions in inchesPage Count: 34. g. 350 Maximum 2. lt has been approved by the Member Bodies of the following countries : Austria India Belgium Japan Canada Netherlands clearance fit bores with set screws. Companion pulleys contain integral spokes which run radially on the pulley. Jorge. All dimensions in mm. Home; Metric Keyways Index page; Parallel Keys and keyway Dimensions; Parallel Keys and keyway Dimensions to BS 4235-1:1972 KeyWay & Key Dimensions. Keyway Broach 1/16 to 1-1/2 Inch - 2. The key and key seat cross section are ISO standardized. Woodruff Keys. J755_200912. Gates belts, hoses, and applications: standard & non-standard shaft keyTaper metric dimensions keyway key bs 1972 keyways keys Standard metric keys & keywaysMetric key ametric. Keyway Depth (Normally 1/2 of width). This produces a high strength-to-weight ratio advantageous to fractional. All dimensions are given in inch units. Carbide Staggered-Tooth Keyseat End Mills. Metric Key & Keyway Dimensions Per ISO/R773 – Js9 Width Tolerance. 5. RoyMech Resources Keyways Woodruff Metric key and Keyway Dimensions These Pages include various standards. All dimensions are given in inches. Woodruff keys work well near shaft shoulders, where a standard open keyway would create too much stress. Moorland Rd. They have a high helix angle and a wear-resistant coating for excellent shearing and chip removal in stainless steel and titanium. keyways available upon request. 1. Keyway size; b h c or r Standard size of b1 and b2 Tightening type Normal type r1 and r2 t1 t2; Standard size Tolerance （h9） Standard size Tolerance b1/b2 tolerance（P9） b1 tolerance（N9） b2 tolerance（Js9） Standard size Tolerance Standard size Tolerance; 2×2: 6~8: 2: 0 -0. Non standard bores and over the keyways. Metric External Table Chart Thread Designations Sizes M 1. 0mm to 26. All dimensions for S. Many keyways are milled directly into a shaft or broached into the. Ultimate tensile strength 580MPa, Yield stress approx 300 MPa. All keyed Shafting is guaranteed to fit on a bearing, and the ends can be. B18. To keep abreast of progress in industry, Australian Standards are subject to peri-odic review and are kept up–to–date by the issue of amendments or new editions as necessary. Keyway Depth. 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. Description. The keys and keyways followed the recommendations of ISO R773:1969 and shaft RoyMech Resources Keyways Taper Metric Key and Keyway Dimensions These Pages include various standards. H is measured Perpendicular to key. Square Drives for Socket Tools ASA B5. keyway and corresponding key sizes for English shafts are listed below in Table 1. TOLERANCES ISO metaux detail com. Keyless Bushings Besides keyed bushings, several types of keyless locking devices using a tapered wedge principle are available. Metric – Rectangular. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. Bore Keyway Fillet Key (D) Tol. 6 - M 18. ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). 0 Cart. 062 0. pdf. 1L, 2L, 3L, 4L and 5L are designed with a shaft extension without a keyway. The last two digits give the nominal diameter B in eighths of an inch and the digits preceding the last two give the nominal width W in thirty. Keys and keyways . They conform to ANSI B17. Because this key stock is slightly larger than standard key stock, keys will fit tightly in worn keyways. Carbide Staggered-Tooth Keyseat End Mills. Standards such as BS 46, ANSI B17. Email. 800-982-3141. The tolerance zone for shaft keyway width b with normal fit is ISO N9 and with close fit ISO P9. We are fully equipped to supply special Pull Type Keyway Broaches to your. Shaft Arbor and Keyseat Dimensional Data American National Standard Keys and Keyways. ANSI/ASME B16. British Standard :BS 46 Part 1 : 1958 Keys and keyways and taper pins. 0mm to 26. For a worn keyway shaft use our well stocked Interference fit range. The inch and metric dimensions here correspond to common values. 542. The breadth and depth of our products help solve the industry’s toughest machining challenges. Metric Size Carbide Round-Shank Reamers. 1265 0. 3mm 2. The sizes and tolerances contained in this Standard are intended for single key applications only. key way & key. The dimension from the top of the keyway to the opposite bore side, “T-dim”, is calculated from (refer to ANSI/AGMA 9002-B04) the following: T = bore + (h kw - Ch) Per BS 4235-1:1972: Specification for metric keys and keyways – Parallel and taper keys. 11, Forged Steel Fittings, Socket-Welding and Threaded;Unfortunately, misaligned keys and keyways can result in mechanical failures. 1 Class 1 standards for dimensions and tolerances. Dimensions shown are in Inches, if you wish to convert to mm, please use our universal converter. BARR. Keyways for Milling Cutters and Arbors. British Standard :BS 46 Part 1 : 1958 Keys and keyways and taper pins. Table of contents. Product data for lock nuts requiring a keyway. Metric Keyways Index page; BS 46 Rectangular Taper & Gib Head KeyWay & Key Dimensions; BS 46 Rectangular Taper & Gib Head KeyWay & Key Dimensions. and 25mm and Type AFS sizes up to 11/2 inch are in stock. 8mm 1. British Standard Metric Keyways for Square and Rectan; gular Parallel Keys BS 4235:Part 1:1972 (1986) Sat — ey eyeay Tonimal Diameter d Width,b Depth Radius r pw | 3% Free Fit Nonal Fit lose Fi Shalt, Tab over | ‘and | 2% | pom, [Stak | Rab] Stat] Ba | Shaman. Check Details. Over To (Incl. 2 Normative references. K80 sprocket old type B semi F series with machined shaft holes (New JIS key) FBN60B finished bore sprocket. 1250 0. 99 #22. ; Lowenherz or Löwenherz Thread Size Table; Excel Spreadheet Design Calculator per. Constant-Tension V-Belt Pulleys A built -in spring maintains tension on your belt. Consent to Cookies & Data processing. This standard presents metric dimensions, tolerances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. 6 - M 18. Referencing Figure 1, the Metric key size is W x T. 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. Metric or inch keyways can be selected with the modification symbol. The usual proportions of this key are : Width of key, w = d / 4 ; and thickness of key, t = 2. 2515 0. KEYS AND KEYWAYS. 1-1967 (R1998) 3/16 7/32 1/4 1 3/4 2 1/4 2 3/4Browse L Type Hubs with Keyway - Metric Bores in the The Timken Company catalog including Part Number,Description ,Bore Size,Coupling Size,Keyway Size (W x D),Length thru Bore,Outside Diameter,CAD. Woodruff Key Dimensions Fastener Mart, LLC Woodruff Keys dimensions and specificationsThe sizes are already designed to be able to properly carry the load with medium strength fastener (Grade 5 or equivalent) SAE J744 specifies the flanges by a letter and a bolt count. 004, -. Japanese Industrial Standard (JIS) Hex Fasteners. All dimensions in inches. MISUMI. Mechanical Power Transmission Association 6724 Lone Oak Blvd. 000 Standard Setscrew Locations If one setscrew is furnished the location. Certified drawings of all ratings are available for construction purposes. 002. We offer the most common American Standard and Metric Pull-Type Keyway Broaches, available either as Industry Standard 500 Series with threaded pull end or 600 Series with notched pull end. Metric External Table Chart Thread Designations Sizes M 1. Standard Pin Taper The standard pin taper is a self holding type taper. TAPER KEYWAY DIMENSIONS - METRIC - BS 4235-1: 1972. KEYSTEEL - METRIC RECTANGLE 12'' PLATED - 14MM X 9MM. Available in metric sizes, these 18-8 stainless steel. 40SD Single/Double Sprocket. Keyway size; b h c or r Standard size of b1 and b2 Tightening type Normal type r1 and r2 t1 t2; Standard size Tolerance （h9） Standard size Tolerance b1/b2 tolerance（P9） b1 tolerance（N9） b2 tolerance（Js9） Standard size Tolerance Standard size Tolerance; 2×2: 6~8: 2: 0 -0. Our Pull-Type Keyway Broaches are ideal for applications in high volume production pull-type machines. Tapered Shaft End and Mating Hole with Slotted Nuts Design Data Dimensions Per. The usage of these tolerances is advised for economic reasons. B. Generally, there are two classes of stock available for sunk keys, mainly parallel keys. It was published under the authority of the Executive Board on 22 February, 1972. keyways & keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys Key Dimensions Standard keylengths (mm). Keyways will be furnished. in Machine Elements & Structural Engineering. Its included angle is 1/4 inch/foot. 3mm 5mm 5mm 5mm 5mm 6mm 6mm 6mm 8mm 8mm 22mm 24mm 16mm 17mm 19mm 20mm 25mm Keyway Width (w) 10mm 3mm 3mm 1. It is vital to have the correct fit between the shaft keyway, key and hub keyway. Couplings • Standard Metric Keys & Keyways for Metric Bores with One Key (Page 2 of 2) All Types . Hub to Shaft. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. 424 Minimum 2. 2 metres. keyway tolerances Mechanical engineering other topics. A woodruff key, also known as a half‑moon key, is a semi-circular machine shaft key that prevents gears, hubs, or other components from moving independently of a rotating shaft or spindle. ISO 965-1 Calculator, Formula and Table Length of engagement of mating threads is selected to utilize full tensile strength of a bolt prior to shearing and nut threads. 57 inch; Coupling Design: One Piece Clamp; Design Units: MetricPFEIFER INDUSTRIES, LLC. Where a key is to be used it should be parallel and side fitting with top clearance. based on the table on webpage Factors. Those standards are also summarized in coupling manufacturers’ catalogs. $7. 14 mm. 010 / -. 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. The collar rests on top of the workpiece rather than being supported from below. Keyway misumiKey and keyway dimensions. Standard Calculator Bore Size. 5") is omitted, it specifies coarse pitch threads. Hardware ANSI Menu. pdf - Free download as PDF File (. Box 12086 Omaha, NE 68112-2086encompassing standard. Sometimes you can put a square peg in a round hole. Get In Touch. High Speed Steel, Cobalt, Cutting Tools, Broach, Steel Cutting Broach. Hub keyway depth is one-half the nominal height of the key and measured from the side corner. a keyway and a keyseat, which is a slot and pocket in which the key fits. Default metric fastener thread pitch. ANSI B17. Standard Plain and Gib Head Keys Specifications per. For technical drawings and 3-D models, click on a part number. S. 442 2-5/16 2. Cylindrical. A. Keyway Width. RoyMech Resources Keyways Taper Metric Key and Keyway Dimensions. Specification for metric keys and keyways – Parallel and taper keys BS 4235-1:1972; Matching the woodruff key to the shaft diameter is also specified in DIN 6888 American sprocket manufacturers have adopted 4 specific types of sprocket construction styles as American Standards . ANSI-B17. They meet DIN 6887, an international standard for machine keys. Appendix B Approximate equivalents of metric and inch units 22 Figure 1 — Variation in keyway depth in taper shaft 19 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 6PREFERRED FITS AND TOLERANCES CHARTS (ISO & ANSI METRIC STANDARDS) Preferred fits and tolerance table for hole and shaft basis systems which are given in ISO 286-1 (2010) and ANSI B4. cloudfront. ANSI Sprocket Standard Keyway & Setscrews. In the Metric system it is common practice to specify the key size. 2500 0. We stock pre keyed shafting in many diameters, including metric diameters, with standard keyways. 628 2. The bore diameters listed in the "Keyway Additional Modification Applicable Bore List" in the table below are available for the service. 11/8″ B Type HSS Keyway Broach; 3/16″ B Type HSS Keyway Broach; 5/32″ B Type HSS Keyway Broach; 5/8″ B Type Collard Bushing (1) 8mm C-1 Type HSS Keyway Broach; 20mm C Type Collard Bushing; 7mm C Type HSS Keyway Broach; 6mm C-1 Type HSS Keyway Broach (1)This is a multi-part document divided into the following parts: Part 1 Metric keys and keyways. British Standard :BS 46 Part 1 : 1958 Keys and keyways and taper pins. COMPONENTS PowerDrive LLC Bore Tolerance 0 to 2 2 to 3 3 to 4 Over 4 +. Metric Key & Keyway Dimensions Per ISO/R773 – P9 Width Tolerance . T Metric trapezoidal thread, 7H: ISO 2903 Use them to connect gears and other components with tapered keyways to shafts. [email protected] . Keyway sizes: Out of stock: $297. Use the middle of the shaft with bearings and other round-bore components. Width Depth Radius SizeBS 4235-1, 72nd Edition, May 24, 2019 - Specification for Metric Keys and Keyways — Part 1: Parallel and Taper Keys. 4375 1. The height of inch keys decreases by 1/8" for every 12" of length. For example: a keyway. AB DE F H LO P T U V AH KEYWAY DIA. 020 0. Product data for lock nuts requiring a keyway. 000 for all standard keyways BORE, KEYWAY & SET SCREW INFORMATION MECHANICAL P. Did. O. 002, -. 5 +. INTRODUCTION — The general practice in industry is to supply coupling hubs without fillet radii in the keyway corners to permit the use of standard commercial keys instead of keys with chamfered. 1 offer from $178. 1-1967, R1989) Metric Square & Rectangular Parallel Keys & Keyways (B. 0 $0. For technical drawings and 3-D models, click on a part number. pdf. 5000. Fillet radii comply with AGMA 9002-A86. Standard Metric Keys Keyways for. 002/-0. dimensioned by its width and depth on the shaft keyway sides. 19-1997; Design of Square Key and Keyway (Wood Ruff. W = d/4[clarification needed] H = 2d/3[clarification needed] where. The use of standard, “off the shelf” items can significantly reduce both inventories and. C. RE: Standard tolerancing on stainless keys and keyways The keyway must be slightly larger than the key itself if the key needs to fit into the pocket. scope: 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. 5. Dimension standards: ISO 2982-2:. 1. The L Type coupling consists of two standard L Type hubs and one spider. Designed to meet ISO 606 and DIN 8187 international dimensional standards, these sprockets are for use with compatible ISO and DIN roller chain. 053 0. rad 10 12 4 4 2. Parallel keys are the most widely used machine key. American National Standard --Bores and Keyways for Flexible Couplings (Metric Series) 1 Scope This standard presents metric dimensions, toler-ances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. Standard metric keys keyways for metric bores with one keyKeys imperial machine table ansi parallel asme class key standard fit Keyway metric key iso dimensions standard keyways keys r773 pdf bores shaft hub depth diameter standards engineering table edge widthTable 11-1 key size vs. KEYWAY: A rectangular opening formed by matching rectangular slots cut axially (lengthwise) along both the coupling bore and shaft. com. The height of inch keys decreases by 1/8" for every 12" of length. Relevant British Standards. 5000 2. 1/2. net. 002 on the key. BSI Shop. Taper per Ft. Gear Products and Suppliers | Gear Knowledge Menu. 3. 886. Metric sizes of key steel bar are bright drawn to minus tolerances conforming to BS4235 “parallel and taper keys”. 004/0. Metric Keyways Index page; BS 46 Square Keys and keyway Dimensions; BS 46 Square Keys and keyway Dimensions Ref. 587 / 2. Nom. All dimensions in inches, coer, SAVMAM GNV SATHfTable 1. Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque. Tolerances h11 h9 h7 and h6 as shown in Table 6 1 The above shaft tolerances are now covered in the new ANSI B32 100 2005 standardOur inch & metric Dumont keyway broaches are made of high speed steel. This British Standard has been approved by The Mechanical Engineering Industry Standards Committee. Milling a keyway in a steel shaftKeyway shaft coupling hole service couplings modification additional motion control tapered parallel Shaft keyway keyedKeyway metric key iso dimensions standard keyways r773 pdf keys shaft bores hub depth diameter standards engineering width table angelica. In addition, set screw holes and keyways may be added as needed. 2-1978 standards. Bore and Keyway Tolerance Table. Metric DIN 6885 Parallel Key High Type “A” (aka feather keys) is a component used to connect machine assemblies to a shaft in. Finished Striaght bores for standard AGMA Class 1 Clearance fit. S. 16~0. K40 sprocket old type B semi F series with machined shaft holes (New JIS key) Standard. May 13th, 2018 - Standard Metric Keys amp Keyways for Metric Bores with One Key Js9 Width Tolerance « Keyways will be furnished per ISO R773 and Js9 width tolerance unless' iet. 14mm X 9mm Rectangle Unplated Key Steel x 3. Use individual keyway broaches in a variety of arbor hole sizes. Metric Standard Parallel Keyway and Key Sizes Shaft Diameter (mm) Keyway (mm) Key (mm)* From To Width (W) Depth (h) Width (W. However, designers tend to forget that other important. When a keyway is damaged, cut a new, wider one. The keys and keyways followed the recommendations of ISO R773:1969 and shaft tolerances followed ISO R775:1969. This limits the number of choices for each shaft size to one key. 487 Minimum 2. 5. Table of Metric Shaft Tolerances per. - Series EL couplings supplied with clearance fit bores with set screws. The work of preparing International Standards. British Standard :BS 46 Part 1 : 1958 Keys and keyways and taper pins. Keys are tapered along their length. . They have a square or rectangular cross section. Finished Striaght bores for standard AGMA Class 1 Clearance fit. Woodruff keys are an. 000 on the width and ends of the keyway, +0. All sizes are in inch units. Module isDimensional Charts are for Metric Taper Keyways, Metric Taper Keys, Imperial Taper Keyways and Imperial Taper Keys. In manufacturing upon 6885 Information used with permission ot Martin 02007 Shatt Keyseats/Hub Keyways Standard Keyseats/Keyways Sra' IoW Square Keyways Metric: WxHKey W x T2 Keyway American Standard — Use individual keyway broaches in a variety of arbor hole sizes. The sunk keys are provided half in the keyway of the shaft and half in the keyway of the hub or boss of the pulley. European norm specifications are. Related. The preferred method for dimensioning a keyway is with a local note. ANSI Hardware Deign and Engineering Data. Buy. February 29, 2012. 4940. ). NSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. Metric bores are defined in ISO standards while English bores are defined in AGMA and ANSI standards. Categories. The bore diameters listed in the "Keyway Additional Modification Applicable Bore List" in the table below are available for the service. 4235 : Part 1 : 1972) Inch Square Parallel Keys & Keyways (B. pdf Key sizeKeyway metric key iso dimensions standard keyways r773 keys pdf bores shaft hub depth diameter standards engineering table edge width. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. Simcut BF Keyway Broaching discourse. 477 Maximum 2. Rotary Shafts - Straight. 8mm 3. Metric Key & Keyway Dimensions Per ISO/R773 – Js9 Width Tolerance «. Thin parallel keys and their corresponding keyways (Dimensions in millimetres) Thin taper keys with or without gib head and their corresponding keyways (Dimensions in. BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. Nom. 5020 2. Woodruff keys work well near shaft shoulders and on tapered shafts. Specification. 0005 / -. The overall length or “C”dimension for each catalog item is included in this catalog. 376 . Nominal. Foreword. 094 0. Created Date:Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. 7 by 15. Metric thread, 5H: ISO 965-3 Axial run-out. Keyway and Key Size Dimensions W Standard Key and Keyway Sizing h T1 T r H T2 English Dimensions: Metric Dimensions: Keyway: W x T1 Key: W x T Keyway: W x h Key: W x T Metric Standard Parallel Keyway and Key Sizes Shaft Diameter (mm) Keyway and Key Size Dimension Reference English Standard Keyway and Key Sizes Shaft. Woodruff Keyways & Keys. The ISO sprockets have large pitches that are measured in sixteenths of an inch, but are expressed in metric units. Just enter the size of the key and shaft, then click "Calculate". 7 size chart. Bore and Keyway Tolerance Table. These are standard metric-sized reamers. Metric Remachinable One-Piece Split Coupling with Keyways (22) Fully metric, including clamp screws. scope: This standard presents metric dimensions, tolerances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. Unless otherwise specified, the shaft keyway is assumed to be standard. Figure: Reference graphic for dimensionsMetric Keyway Sizes. Keys covered by this Standard have a relatively tight width tolerance. A common standard available from the Mechanical Power Transmission Association is. Has anyone got a link to one ? Thanks Roger . Metric Calculator Bore Size. Because this key stock is slightly larger than standard key stock, keys will fit tightly in worn keyways. The key prevents relative rotation between the two parts and may enable torque transmission. Use them to connect gears and other components with tapered keyways to shafts. shaft to the center of the keyway. . Size Shaft Dia. Tough. 2: Tolerances: KM/KML Metric thread, 5H: ISO 965-3 Axial run-out locating face/thread: 0,02 to 0,06 mm max. 2 Normative references. S. When one end wears out, switch to the opposite end for two times the life of a standard carbide end mill. 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). SAE has standardized shaft configurations to use keyways and splines to attach components. 1/8 keyway, 3 ft. net. Please note that the key sizes in parentheses are older sizes that are no longer commonly used. 0mm Metric - Standard Sizes. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. They are called “keys” because they lock a component to the shaft by means of a corresponding keyway in a shaft. /4 5/.