Standard keyway sizes metric. In general, the dimensions containedKeyway width P9 tight fit (standard design) JS9 or N9 loose fit (requires written agreement) see also. Standard keyway sizes metric

 
 In general, the dimensions containedKeyway width P9 tight fit (standard design) JS9 or N9 loose fit (requires written agreement) see alsoStandard keyway sizes metric  Bushing with Collar Shims: Aluminum, Brass, Bronze, Iron, Plastic, Steel: 0000000: 0000000: 15: A-Style Broach for 1/16" Wd

The inch and metric dimensions here correspond to common values. , New Berlin, WI 53151-7953 March 2015 (PDF revision. 26, so the flat diameter is about 3 1/4”. Inch keys conform to ANSI B17. Are there any standards for Metric bores and / or keyways? There many standards that cover the topics of metric bore tolerances, fits and keyway sizes. Please note that the key sizes in parentheses are older sizes that are no longer commonly used. --keyway dimensionsKeyway chart diagram hallite. Centre holes as per this standard are meant for the assembly of pulleys. Parallel Inch Key Sizes. E. 050 Tightest fit = 40. Pulleys HTD® Pulleys MXL Pulleys XL Pulleys L Pulleys GT®2/GT®3 Pulleys T Pulleys FHT® Pulleys PDF (inch) PDF (metric)All Types (Page 1 of 2) ++ Keyways will be furnished per ISO/R773 and Js9 width tolerance unless otherwise specified. 0005 / -. Box 316 1415 5th Avenue. D. The ANSI B4. $182. 3:At the time of publication of this Standard, the demand for metric keys was not sufficient to enable standard ranges of lengths to be established. Metric standard keyway sizes_联轴器厂家-guangzhou link automation140pcs assortment 30mm keys 16mm x20mm 10mm Sae to metric conversions for hex keys chart imageFwb lengths metric. ISO 3912-1977: Specification for metric keys and keyways - Woodruff keys and keyways BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements BS ISO 4156:2005_1: Straight cylindrical involute splines. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. 35 LB. . 02" 1/32" 3/64" 1/16" 3/32" 1/8" 5/32" 3/16" 7/32" 1/4" 5/16" 3/8" Cut Style. All have an ANSI standard keyway (keys not included; see our selection of key stock). 8750 inchRecommended Drilling Sizes for Tapping (Using Standard Drills) Calculation of Tapping Formulae. ANSI/ AGMA 9103-B08 - Flexible Couplings – Keyless Fits (Metric Edition) API STD 610 - Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industries; API STD 671 - Special Purpose Couplings for Petroleum, Chemical and Gas Industry Services ; AIA/NAS NA0139 - Keyway and Key Slot Dimensions Metric (an Aerospace standard). As with all functions of the Machinist's Calculator, linear values can be. 1/8 keyway, 3 ft. Therefore most motor series are offered with both standard frame sizes. 763 5. I. Contact Application Engineering for assistance. Also calculated are the overall measurements for shaft and bore, as well as the chord height. They’re also better than keyed shafts for applications requiring frequent disassembly or adjustments because you. ANSI/AGMA 9112-B15 describes sizes and tolerances for straight and tapered bores and associated keys and keyways, as furnished in metric flexible couplings. 3mm 2. Basic concepts and principles. Recommended uniform relationship between shaft diameter and key sizes for parallel and taper keys. 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. In the English and American system, the keyway in the hub is dimensioned by the width. Shape and dimensions of parallel key and keyway Shape and dimensions of taper key, headed taper key and keyway Excerpt from JIS B 1301:1996 S1 = b's tolerance× 1 2 S2 = h's tolerance× 1 2 h2 = h, f = h, e ≒ b S1 = b's tolerance× 1 2 S2 = h's tolerance× 1 2 Key body Cross section of keyway Key bodyMetric Woodruff Key and Keyway Dimensions and Tolerances (all dimensions in millimetres) in accordance with BS 4235-2:1977 and ISO 3912-1977 b x h 1 x D Width b Depth Radius R Nom Tolerance Class Shaft t 1 Hub t 2 Normal Close Shaft Hub Shaft & Hub P6 Nom Tol Nom Tol Max min N9 Js9 1. h 9. For Keyway Dia. 15 products. S. DIN 6885-1 :- Key, Hub Keyway, Shaft Keyway Details and Dimensions. Metric Key & Keyway Dimensions Per ISO/R773 – Js9 Width Tolerance «. The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94. 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. xls Created Date: 1/23/2014 8:35:20 AM. 4. 366 4. 572 3. 1 - 1972 # Tolerance each on T1 and T2 (1" -14. 500. 3 - 3. 004 - . Keyway broach 1/16 to 1-1/2 inch, 2. 3 mm. 19-1997; Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque. Nominal Bore Diameter Clearance Bore Interference Bore Keyway “T”-DIM. General overview (all dimensions are millimeters) The basic size of the feature or fit is the dimension the tolerances will be applied to: The. Made in USA. . 1 / 1 6 " 3 / 3 2 " 7 / 6 4 " 1 / 8 " 5 /. 2 standards for dimensions and tolerances. scope: This standard presents metric dimensions, tolerances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. Coarse. 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. keyways available upon request. They are useful for shaft end. Standard Sprocket, Model 35A. (540 to 700 MPa) Elongation – 12% MIN Material – ENG (0. pdf), Text File (. 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. In stock and ready to ship. The gap of the keyway is shown with tolerances again and the semi-gap is shown. 270 best images about hebrew on pinterest Prophets israel judah prophesied godly kingdoms powerpoint Chart of kings of israel and judah with prophets Chart – kings of israel and judahContact your local Baldor office for “L” Dimensions. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. This standard BS 4235-1:1972 Specification for metric keys and keyways is classified in these ICS categories: 21. --keyway dimensions Keyway sizing chartDimensions standard keyseat keyway shaft shafts diameter nominal. 48 products. Common ‘M’ sizes for grub and set screws include: M1. 500. Slightly larger than the size listed, these oversized keys. Taper per Ft. pdf Shaft diameterKey steel pulleys belts metric transmissions stationaryengineparts. 4 mm. Keyway Depth (Normally 1/2 of width). Special lengths are also available . Caliper Diameter Bore Pitch Dia . OD; 1" 1 1/2 " 1 3/4 " 2" 2. 477 Maximum 2. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. 2500 0. 035 1. 2180 Corporate Lane, Suite 104 ~ Naperville, IL 60563 USA Phone (630) 596-9000 Fax (630) 596-9002. 350 Maximum 2. Their extra depth in shaft reduces the overturning tendency in its keyway. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. 002. A. Flat — The tip makes good contact on flat surfaces. Clearance Fit Bore Tol. The deviation determines if the feature will be oversized. Woodruff key is essential for operating high speed. (Square) Max. ISO Standard. bxh Radius r. 80. 00. New Brighton, PA 15066 Tel: 724. 05" 3. Imperial sizes of key steel bar are bright drawn to plus tolerances conforming to BS46 “keys and keyways”. 2-1/4″ OAL, 8 Teeth, Carbide Tipped, ANSI 809, Old. 994 products. 8 0. Hex, round, and step profiles are available to mate. Tube Cleaners. js9 widthTaper keys. 6 mm. 1⁄2. Keyway (Hub) Keyway. The tolerance zone for shaft keyway width b with normal fit is ISO N9 and with close fit ISO P9. Bost-Kleen BK Speed Reducers. note form tolerancing. Keyway dimensionsKeyway aii Metric keyway tolerance chartShaft and hub keyway dimensions. Mechanical & Motion Systems. Typical steels for locknuts are: AISI, C1015, C1018, C1020, C1025, C1035, C1117, C1118, C1212, C1213, and C1215. D. 5020 2. 1. Refer to the Factory. 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 6888Used with the appropriate bushing size (American Standard or Metric) to cut to full width and depth in one pass. Keyway Dimensions. Imperial systems use inches and feet, and these are the. Only the range of key lengths and dimensions of keyways differed for machine tool applications. Check Details. 4235 : PART 1 : 1972Description: In alloy steel, we have all standard sizes available in stock, ranging from 3/8 inch to 4 inch O. Fillet radii comply with AGMA 9002-A86. Gates belts, hoses, and applications: standard & non-standard shaft keyTaper metric dimensions keyway key bs 1972 keyways keys Standard metric keys & keywaysMetric key ametric. 000" and1. is a taper key which fits in a keyway in the hub and is flat on the shaft as shown in. Keyway Bore (inches) Reference Height (d) 1. Aligned dimensions have text placed parallel to the dimension line with vertical dimensions. oil-embedded bushings and oil-coated pins, this chain is self-lubricating, which means it requires. Metric keys conform to DIN 6888 standards. Interference Fit Bore Tol. , " x 1. Taper keys with or without gib head and. Keyways will be furnished per ISO/R773 and Js9 width tolerance unless otherwise specified. Step bore combinations including inch to metric are also available. d. 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. SIZE ATK100P 3/32 x 3/32 ATK101P 1/8x 1/8 ATK102P 3/16 x 3/16 ATK103P 1/4 x 1/4 ATK104P 5/16 x 5/16 ATK105P 3/8 x 3/8 Keyway dimensions metric key js9 iso tolerance per hub radius width depth diameter nominal thru hasn answered question yet beenKeyway keyways clubrunner bores wxh 3/16" x 3/32 keyway keyed shaft 7/8" x 6" metals & alloys businessKeyway bore modification service inch additional ka standard diameter. 04 in inch mm > 0. 4 Saddle keys. Straight Sided Spline Dimensions. Use individual keyway broaches in a variety of arbor hole sizes. Easily calculate the values required to cut keyseats and keyways. 953 6. - Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. The unit of measurement for dimensioning should be in accordance with the policy of the user. These sizes will be furnished when keyway size is not. Metric Key & Keyway Dimensions Per ISO/R773 – P9 Width Tolerance . or Dia. Made of solid carbide, these keyseat cutters are harder, stronger, and more wear resistant than high-speed steel for the longest life and best finish on hard material. 31 38 10 3. T-Nut. Find Keyway Broaches at MSC Industrial Supply, serving the metalworking, safety, and MRO industries for over 75 yearsPartially Keyed Rotary Shafts. Round keyed shafting: 1/2 dia. Have your dimensions con-firmed when placing your order or. Keyway A-Style Broach for 3/32" Wd. Balance the assembly by adding balancing clay to the workpiece. 25÷3. 1 for Js9 Dimensions) Key & Keyway Dimensions – Millimeters Coupling Hub Keyway Dimensions – Inches Shaft DiameterKeys and keyways. Use the keyways with machine keys to transmit torque to gears, sprockets, and other keyed components. , depending on the lock nut size: Mating shaft threads (recommendation) KM/KML Metric thread, 6g: ISO 965-3 HM/HME and HM . Axial run-out locating face/thread: 0,06 to 0,16 mm max. Our largest keyway is 2. F, are reference values that split the tooth depth into the reference addendum and the reference dedendum. Undersized Machine Key Assortments Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble parts frequently, such as during maintenance or prototyping. and 25mm and Type AFS sizes up to 11/2 inch are in stock. WIDTH. 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. 0. ; Most countries outside of the United States, including Canada, use the metric system of measure, or. Minimum hardness, tensile strength. Woodruff Keyseat Cutter: 1. 0005. 5000 2. Metric module, side fit. 875" x 0 . In the English and American sys- tem, it is the standard practice o sp cify the key size. 4 Metric External Table Chart Thread Designations Sizes M 1. 1 Square Keyway Tolerances Minimum 2. We are also fully equipped to custom manufacture any Special Keyway Broach orders not listed in our catalog. Measurement System. Because this key stock is slightly larger than standard key stock, keys will fit tightly in worn keyways. PARALLEL KEYWAY DIMENSIONS - METRIC - BS4325:1 1972. Also known as Lovejoy® couplings, these three-piece couplings have a spider-shaped cushion between two hubs to reduce shock and handle minor shaft misalignment. Metric Keyways Index page; BS 46 Rectangular Taper & Gib Head KeyWay & Key Dimensions; BS 46 Rectangular Taper & Gib Head KeyWay & Key Dimensions. Note: Broaches have a. Figure 2 Keyway Sizes. 20 Pitch Spur Gear; 24 Pitch Spur Gear; 32 Pitch Spur Gear; 48 Pitch Spur Gear; 64 Pitch Spur Gear; 72 Pitch Spur Gear; 80 Pitch Spur Gear; 96 Pitch Spur Gear; 120 Pitch Spur Gear; 1/10 Circular Spur Gear; Spur Gears - Metric. RoyMech Resources Keyways Taper Metric Key and Keyway Dimensions These Pages include various standards. Use these metric nuts in channels and tight spaces where round-base. A complete coupling consists of two hubs and one spider, or two hubs,. 1. The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. frame size 225, 250 and 280 b5 flange has quantity 8 "s" mounting holes starting at 22. 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. 30 Keys and keyways, splines; This British Standard relates to the following types of keys and keyways with dimensions in millimetres: square parallel, rectangular parallel, square taper, gib-head and plain,1L, 2L, 3L, 4L and 5L are designed with a shaft extension without a keyway. 1-1967, R1989) Metric Square & Rectangular Parallel Keys & Keyways (B. Keyway width P9 tight fit (standard design) JS9 or N9 loose fit (requires written agreement) see also. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. xls Author: KEITHKeyway Standards Bore and Keyway dimensions comply with ANSI/AGMA 9002-B04 Standard. 0010. BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements. Building and Machinery Hardware. Taper metric dimensions keyway key bs 1972 keyways keys. Inside Link Plate Height Cottered Chain Width* Riveted ChainHole-Mount Fixture Keys. Standard keyway dimensionsKeyway chart Keyshaft keyed shaft, diameter 1 7/16. 6 - M 18. COMPONENTS PowerDrive LLC Bore Tolerance 0 to 2 2 to 3 3 to 4 Over 4 +. xls Created Date: 1/23/2014 8:35:20 AM. The exception being smaller cut to length shafts with a quantity. Key Depth Tolerance is +. Keyseat Cutter Hole Diameter: Nominal Size Square Key: Cutter Hole & Keyway. 25 - M 1. The first principle to grasp is the fit designation of the shaft /hole joint. COMPONENTS PowerDrive LLC Bore Tolerance 0 to 2 2 to 3 3 to 4 Over 4 +. And the dimension is added from the bottom of the keyway to the bottom perimeter of. 95" 3" 3. 000 / +0. Keyway Dimensions. The KK clutch consists of a standard metric ball bearing combined with cams. Stress Concentration Shaft. Gates belts, hoses, and applications: standard & non-standard shaft keyShaft standard key sizes table non bushing bore keys qd shallow range gates. 000. Imperial systems use inches and feet, and these are the. Metric standard keyway sizes_联轴器厂家-guangzhou link automation140pcs assortment 30mm keys 16mm x20mm 10mm Sae to metric conversions for hex keys chart imageFwb lengths metric. 90 #21. thck Nom Free Normal Close/Int - - - -. 360 Minimum 2. Keyway Dimensions: Melting Points: Metric Tap Chart: O-Ring Sizes: Pipe Threads: Screw Extractors:. PFEIFER INDUSTRIES, LLC. 46: Part 1 : 1958). Keyway Bore Diameter Size Bore Reference -0. “A” DIM. Converts set screw fasteners to a split clamp device; Will not damage soft shafts; Superior holding power; Standard and metric shaft adapters are. Keyway Size Chart - Farrell BearingsStandard metric keys & keyways. 8mm 2. 4 x 4 1 1 0. 2 Axial run-out locating face/thread: 0,05 to 0,30 mm (0. T. sorted by For Keyway Size, ascending. 1. Choose from our selection of 1 3/16" shafts in a wide range of styles and sizes. Unfortunately, misaligned keys and keyways can result in mechanical failures. Dimensions shown are in Inches or mm, if you wish to convert them, please use our universal converter. 48" 11mm 0. 40 D. Recommended ANSI Standard Keys and Keyseats Design per. 2 mm. 3 mm. 4. A rectangular key is generally used for shaft diameter between 1” (25 mm) and 20” (500 mm) Generally, these have a reduced effect on the shaft due to its shallow keyway depth. (See Pg. b x h width x thck. 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. 000 1 1/16” to 2” +. 424RoyMech Resources Keyways Taper Metric Key and Keyway Dimensions These Pages include various standards. The safe Max. TEL : +81 48 254 1744 Easy Gear Selection Pages. , depending on the lock nut size: Mating shaft threads (recommendation) KM/KML Metric thread, 6g: ISO 965-3 HM/HME and HM . 2-1978 standards. 66: Each: FG2517-M20: 2517 Bush 20mm Bore 6mm Keyway :. 35" 2 1/2 " 2. 5020 2. A list of the standard key sizes and corresponding keyways for Metric shafts are listed below in Table 2. Minimum hole size is the basic size Metric preferred hole based system of fits . 3D Printing & CAD. 1 / 0 0. (in) (in)* (in) 45 50 14 3. PARALLEL KEY DIMENSIONS - METRIC - BS4325:1 1972 ANSI woodruff size charts express measurements in inches and nominal key sizes with higher numbers corresponding to bigger keys. Woodruff key cutter size chartStandard woodruff keys Shaft standard key sizes rectangular gates keys diameters most non std readily availableKeyway key. 1. 015/-0. 015 Se 3V, 3VX Less than 3. Use the middle of the shaft with bearings and other round-bore components. 0005 50 mm ISO k6 > 1. Choose from our selection of hardened bushings, including press-fit drill bushings, made-to-order press-fit drill bushings, and more. While a designer is free to specify any keyway they wish, straying from the standard option is likely to increase the cost, time, and complexity of the part. tolerances and fits for metric bores and keyways. 0mm to 26. Lovejoy’s standard bore program covers AGMA, SAE, and DIN bore/keyway and spline bore combinations. 000 – 39. 10 mm. 6 Dimensions of tangential keys and keyways 16 7 Dimensions of keys and keyways for marine tailshafts 17 8 Keys and keyways for tapered shaft ends 19 Appendix A Preferred lengths of keys 20 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. Y. Keys 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. Standard Sprocket, Model 25B. 8. Hardness. keyways & keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys This primer provides answers to frequently asked questions related to metric bores and keyways used in couplings. length, 136700. 6 - M 18. 1 for Js9 Dimensions)MM Bore and Keyway dimensions conform to ISO standard recommendation R773, for Free fit * Verify torque capability. Keyway Depth. Nominal Shaft Diameter Nominal Key Size Normal Keyseat Depth Over Up to and Incl. Their extra depth in shaft reduces the overturning tendency in its keyway. Install these keys in a drilled and reamed hole to locate fixtures and vises on your machine table. See ANSI/AGMA 9112--A04 for metric bores with metric keyways. Nom. The dimension drawings will show the flanges for each size. Inch keys conform to ANSI B17. N = Number of Keys (same size) Keyway application design factor K d. - Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. Clean delicate surfaces inside tubes, pipes, and holes. Standard keyway dimensionsKeyway chart Keyshaft keyed shaft,. 3 0. [1] The number gives their outer screw thread diameter in millimeters as with the. 1 -1967 (2004) standards for metric and inch unit systems. See dimensions W and h in Figure 1. (Dimensions comply with DIN 6885/1) Requires use of chamfered keys. 8 14 9. Browse Metric Set Screw Couplings w/Keyway MRC4H-Series in the Climax Metal Products Company catalog including Item #,Bore,OD,Length,Screw Size,Keyway Size,Material,Weight,CAD 800. Consider a 200 hp (150 kW), 1,800 rpm motor. Style A arbors feature a pilot 23/32" diam. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. B. Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. ISO sprockets have large pitches that are measured in sixteenths of an inch, but are expressed in metric units. , depending on the lock nut size: ANSI/ABMA Std. %PDF-1. 03 3 +0. b x h 1 x D. Keyway Dimensions: Melting Points: Metric Tap Chart: O-Ring Sizes: Pipe Threads: Screw Extractors: Sheet Metal Gauges & Weights: Socket Head Cap Screws: Taper Calculations:. 189 Clearance Fit Bores 3-1/4 3. ANSI-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. Cup — The cup has a thin edge that digs into the contact surface for a secure hold on a wide range of surfaces. 14–15 Pull Type Production Keyway Broaches A full line of Industry Standard 500 and 600 Series and 5M and 6M Series Keyway Broaches are available. Keyseat Alignment Tolerances: A tolerance of 0. 02/-0. 002 to 0. Dia Width b Depth. All dimensions in mm. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. 2 Axial run-out locating face/thread: 0,05 to 0,30 mm (0. These hubs are designed to. Knurl-Grip Cup — Serrations on the cup edge grip the material surface. 002 to 0. Keyways will be. 01 2. Keyway and Key Size Dimensions * Common dimension specification English Standard Keyway. Also known as half moon keys. 350 Maximum 2. Commonly used on holes with keyways and other interrupted cuts. Use our Metric Keyway Calculator or Imperial Keyway Calculator to. The most widely followed dimensions for propeller tapers is the internationally accepted standard S. Standard External Metric Thread and Fastener Sizes M 0. 100 standard ; Available in. 4 Dimensions and tolerances4. The common specification dimension, Key Size, is highlighted.