2180 Corporate Lane, Suite 104 ~ Naperville, IL 60563 USA Phone (630) 596-9000 Fax (630)2 Ansi B17 1 Standard Keyway Dimensions Lowellcorp 2023-04-07 tolerance of 0. 010 inch, max is provided for offset (due to parallel displacement of keyseat centerline from centerline of. Standard Roller Chain;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. ANSI Flat, Pan, and Oval Head Wood Screws per. Get In Touch. Height. Ct. Related: Shaft Arbor and Keyseat Dimensional Data American National Standard Keys and Keyways; Standard Metric Keys Keyways for Metric Bores with One Key; Keyway. 120. 14. Type C - Keys with both ends round hole for one retaining screw (for sizes 8 X’7 and Wear-Resistant Sprockets for ANSI Roller Chain. Joined: Jun 2009 Posts: 978When installed, these keys fill oval keyways completely, reducing stress on the key and shaft. The following tables show standard dimensions for keys and their grooves. Domain RegisteredFull Length Pre-Keyed Shafting. 1 Size Shaft Dia. In stock and ready to ship. 0000 0. Min. BS 4235-2:1977, ISO 3912-1977: Specification for metric keys and keyways - Woodruff keys and keyways. 459 Maximum 3. T Metric trapezoidal thread, 7H: ISO 2903 Axial run-out locating face/thread: 0,06 to 0,16 mm max. Our Standard woodruff keys are machined metal fasteners used to transfer torque from a shaft to gears and function as a fail-safe device and have ANSI Standard dimensions. 406 Minimum 3. Over To (Incl. 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) B +0. 324 Minimum 3. Keys and Keyseats - United States Standards Institute. 1. ANSI B4. The key prevents relative rotation between the two parts and enables torque transmission. Less cylinder - Options to fit Schlage Primus and 5 competitive cylinders. Choose from our selection of taper locks, including taper-lock bushings, split-tapered bushings, and more. Documents sold on the ANSI Webstore are in electronic Adobe Acrobat. Check Details. Squidly-Diddly, Apr 11, 2011 #7. Industries standards for key sizes in varies bores exist. Merely said, the Ansi B17 1 Standard Keyway Dimensions Lowellcorp is universally compatible in the manner of any devices to read. Detailed width. (ANSI/AGMA 9002-B4) Nominal Shaft Diameter ( A ) Bottom of Keyway to Bottom of. 0625 0. ) Width Tolerance. * These Width A values were set with the maximum keyseat (shaft) width as that figure which will receive a key with the greatest amount of looseness consistent with assuring the key's sticking in the keyseat (shaft). The standard unit of length in SI Units is the meter. 0625 0. ANSI B17. The keyway is for fixing your sprocket to the shaft to keep the sprocket from spinning. 7530 3. Standards pitch available is 1/4 inch, 3/8 inch, 1/2 inch, 5/8 inch, 3/4 inch, 1 inch, 1 1/4 inch, 1 1/2 inch, 1 3/4 inch and 2 inch. 469 Minimum 3. Information and documents presented . Check Details. 1265 0. 0000 /-. 2: Tolerances: KM/KML Metric thread, 5H: ISO 965-3 Axial run-out locating face/thread: 0,02 to 0,06 mm max. 1 Tolerance Table provides a suitable range from which appropriate tolerance for holes and shaft can be selected. WIDTH. The Woodruff Key numbers indicate normal key dimensions. The teeth are sized to fit into metric ISO roller chain. Interference Fit Bore Tol. Account. In some cases, you likewise realize not. Woodruff eliminates the milling around the shaft shoulder where concentricity and stress concentration can be affected. Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. Abstract: This standard lists terms and their definitions with symbols for gear nomenclature. An ISO keyboard layout follows the standards set by the International Organization for Standardization and most obviously differs from an ANSI layout by its upside-down L-shaped Enter key that sits. 000 Bores with closer tolerances will be supplied at a slight increase in price. ISO 2490:1996 Single-start solid (monobloc) gear hobs with tenon drive or axial keyway, 1 to 40 module - Nominal dimensions $26. Publisher Collections; Standards Connect; Standards Packages;. ANSI Standard Woodruff Key Size Table Chart ANSI B17. 1” and Less 1-1/16” to 2” + 0. Secure sensitive lighting equipment; these switches have a round key that is difficult to duplicate. Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Size Shaft Dia. Email: sales@usarollerchain. 19. Set Screws per. If referring to internal thread tolerance, the "g" would be uppercase. 4 and round result to two decimal places. 19-1997 American National Standard Keys and Keyways for Milling Cutters and Arbors; Shaft Key Seat Depth Control Values S and T for Shaft and Hub. 5-6g means metric fastener thread series M, fastener nominal size (nominal major diameter) 10 mm, thread pitch 1. Arbor Keyway Cutter Hole Keyway. AGMA 9002-A86 Inch Bore and ANSI B17. All keyed Shafting is guaranteed to fit on a bearing, and the ends can be. pdf), Text File (. ICZW Keyway Broach Set HSS Keyway Cutting Tool for Lathe Metric Size Broaches with Bushings and Shims (22 pcs) 2 offers. (dimensions comply with din 6885/1) † requires use of chamfered keys. All dimensions given in inches. Keyway Width Measurement. Metric keys conform to DIN 6888 standards. ANSI B17. 012. Please note that the key sizes in parentheses are older sizes that are no longer commonly used. 3/8 . Keyway Bore Diameter Size Bore Reference -0. However, in cases of dispute of the individual keyway depths. 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. A detail drawing of a gear would also include other dimensions not found in the table (root diameter, bore diameter, keyway dimensions). 875. W = d/4[clarification needed] H = 2d/3[clarification needed] where. Mon - Fri: 8:30 am - 6 pm EST. Recommended ANSI Standard Keys and Keyseats Design per. 49 4 M i4 Ms ai l gn lm m e Mn t4 FMm u Mdm Um 49 4 M i4 Ms ai l gn lm m e Mn t4 FMm u Mdm Um 450 630-852-0500 Safety Warning ED-2 When using Lovejoy products, you must follow these instructions and take the following precautions. #40 chain sprockets are already bored to size and include a keyway and 2 setscrews. 048: 0. ABSTRACT. Wear-Resistant Sprockets for ANSI Roller Chain. All the standards recognize this and specify tolerances for. 1 standard which is based on inch units. Publisher Collections; Standards Connect; Standards Packages;ANSI-B17. 378 Maximum 3. This revised version of the standard includes an extension of the bore sizes (through 18 Woodruff Keys ANSI B17. 8750 1. g. All dimensions are given in inches. ANSI-B17. Page 1 of 6. 7500 3. Related. Shaft with Two Keyways Torque Applied Deformation and Stress Equations and Calculator. Size, bxh 1 1/4. 628 2. Normally, gear drawings include a table of information, called cutting data, for manufacturing. Our digital library spans in multiple countries, allowing you to get the most less latency time to download any of our books like this one. If incomplete or incorrect provider/NPI numbers are entered on your claims, the claim will be rejected by the Payer. This standard presents metric dimensions, toler- ances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. Embed. ANSI Woodruff Keys. 1. The pointer changes to . Categories. “A” DIM. These hobs are intended for the production of gears which conform to ISO 54 and present a 20° pressure angle in conformity with ISO 53. 1 Keyway Dimensions - Free download as PDF File (. Width. 1 Scope. We additionally give variant types and plus type of the books to browse. Dimensions E-156 25 1 ⁄ 8. Fully threaded, headless screw with a hexagonal drive at one end and a cup-shaped indentation at the other. The Keyway dimensions are also different from the English system. Lag Screw Metric Size and Dimensions per. ANSI B17. All. Cross-section of a parallel keyed joint. All dimensions are given in inches. Max. All dimensions are given in inches. 1 system of tolerances is prescribed by the standard for basic sizes up to 200 in. 2 Electronic Claims Using the ANSI 837 Format – User Guide NPI Numbers –Billing and Rendering NPI numbers must be correct on your claims. 0 Add to cart. Keyway dimensions and set-screw locations. 015 In, Language English, Provides Keyway Formula, In. Scribd is the world's largest social reading and publishing site. 3mm 5mm 5mm 5mm 5mm 6mm 6mm 6mm 8mm 8mm 22mm 24mm 16mm 17mm 19mm 20mm 25mm Keyway Width (w) 10mm 3mm 3mm 1. Tolerance. 1 Square Keyway Tolerances Minimum 3. Also, T1 and T2 are not A key is a machine element used to connect a rotating machine element to a shaft. Set Screw Type D. Page Count: 34. 010 / -. British ISO Metric Screw Threads Designations. Standard sizes in diameters from 3/8″ to 2 1/2″. Standard sizes shaft key bushing bore table keys non shallow bushings taperlock gates required specific includes each Standard keyway sizes chart Keyway-and-key-size. Min. Open navigation menuUp to two different flange dimensions are available for each size of helical gear unit and. 2 door frame preparation standard. keyways available upon request. ASME B1. ANSI/AGMA 9002-C14 Bores and Keyways for Flexible Couplings, Inch Series. Keyway chart. 3 Keyseating - The operation of producing keyseats. Without Keyway. It’s the same shape and position as the right Alt key, so we’ve. 750. Key-Depth Tolerance is +. This standard describes sizes and tolerances for straight and tapered bores and the associated keys and keyways, as furnished in flexible couplings. and key size for parallel and taper keys. be made for keyway and setscrews. Finished bore sprockets are commonly referred to as a "type B" or "type BS" sprocket. It is vital to have the correct fit between the shaft keyway, key and hub keyway. Special keyway dimensions are also available upon request. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Height (d) (t) - DIM. 13. They conform to ANSI B17. ANSI B17. Groove dimensions keys DIN 6E-ga Shut 1 (With • 1972. Metric Key Steel. See dimensions W and h in Figure 1. ASME (ANSI) Y14. 3/8 . ANSI B18. The deviations are less than the basic size. 800-982-3141. Standard Plain and Gib Head Keys Specifications per. 8. Screws: Furnished with combination screws for use in wood or metal doors and frames. PFEIFER INDUSTRIES, LLC. The keyway is a longitudinal slot in both the shaft and mating part. This specification includes index tolerances for multiple keyways. The intent of this document is to offer designers and users of flexible couplings preferred dimensions, tolerances and fits for metric bores and keyways. Set Screw Type G. 3750 7/16 . Shaft with Keyway Torque Applied Deformation and Stress Equations and Calculator. 120. We stock pre keyed shafting in many diameters, including metric diameters, with standard keyways. (ANSI) empowers its members and constituents to strengthen the U. 5 mm, external thread class fit 6g. 322 3/32. Choose from our selection of set screw mount sprockets, including sprockets, machinable-bore sprockets, and more. -lbs. The inch and metric dimensions here correspond to common values. 6 - M 18. The keyway dimensions are also different from the English. The keys are square or rectangular. You might not require more grow old to spend to go to the ebook start as well as search for them. 1 Class 1 standards for dimensions and tolerances. 3/8 . Shaft keyway dimensions and tolerances were given in ISO R773:1969. JIS B 4258 ‐ Detachable pilots for use with counterbores and 90 degree SIGN countersinks ‐‐ Dimensions 4. of 1. Min. 1. Keyseat Cutter Hole. / 2. Max. 0008 / -0. , depending on the lock nut size: ANSI/ABMA Std. 1. Customer Service: 212 642 4980. ANSI/BHMA Certified A156. The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94. This standard presents inch dimensions, tolerances, and sizes for straight bores, tapered bores, single keys and keyways for unmounted industrial flexible couplings. Metric Key Keyway Dimensions. 1 specifications conform to ANSI standards for dimensions and tolerances. Key blanks are controlled through authorized distribution and geographical protection is available. O. ANSI Sprocket Standard Keyway & Setscrews. 0000 4. 2 continued. Rekey lock, either keyed different or keyed alike, without removing the lock from the door. Threads are American National form, Class 3. If you are in America or North America. 8M ; BS ISO EN DIN 20898-7 Mechanical properties of fasteners: torsional test and minimum torques for bolts and screws with nominal diameters 1–10 mm ;ROLLER CHAIN DIMENSIONS SPROCKET TOOTH DIMENSIONS MAXIMUM HUB RECOMMENDATIONS APPLICATION AND SELECTION. The diameters listed in our chart is the outside diameter of the sprocket (Tip of the sprocket tooth). 1, the Metric key size is W x T. “Hydraulic Pump and Motor Mounting and Drive Dimensions”. 1 Keyway Dimensions - Lowell CorporationAGMA 9002-A86 Inch Bore and ANSI B17. 1 Keyway Dimensions - Lowell CorporationAGMA 9002-A86 Inch Bore and ANSI B17. They have two set screws and a standard ANSI keyway, except 1/4", 3/8", and 1/2" bore sizes do not have a keyway. Larger diameters must be selected in order to ensure that the shaft will be able to withstand the full torque of the application. Design of Square Key and Keyway. Key Size Versus Shaft Diameter ANSI B17. Use them to connect gears and other components with tapered keyways to shafts. They are also designed to protect a power transmission application by failing first, which protects other component. PFEIFER INDUSTRIES, LLC. ASME Y14. 0000 4. 5 - 10 Standard with keyway mounting STANDARD DESIGN | SIZE 15 - 2,500 Standard with keyway mounting WITH KEYWAY CONNECTION 0. 375 0. ANSI H7 ISO H7 0. 002, -. Shaft keyseat dimensions and tolerances. Below is a sprocket diameter chart we've put together to help you identify the sprocket diameter you need based on the chain size and tooth count. Scope- Covers the dimensions and tolerances for parallel keys and keyways. tolerances for inch bores, keys and keyways for flexible couplings. 49 4 M i4 Ms ai l gn lm m e Mn t4 FMm u Mdm Um 49 4 M i4 Ms ai l gn lm m e Mn t4 FMm u Mdm Um 450 630-852-0500 Safety Warning ED-2 When using Lovejoy products, you must follow these instructions and take the following precautions. Typed-in dimensions are bad practice in CAD, especially 3D CAD like SolidWorks. Mount them onto your shaft and secure with a set screw— no machining necessary. Super-Corrosion-Resistant 316Stainless Steel Cone-Point Set Screws. Unless otherwise specified, the shaft keyway is assumed to be standard. 5 x 5 (102 x 127) • Rated bhp at 400 rpm (kw): 415. 3mm 2. The keys and keyways followed the recommendations of ISO R773:1969 and shaft tolerances followed ISO R775:1969. Mon - Fri: 8:30 am - 6 pm EST. 0mm to 26. This is a DIN or ANSI keyway Ø G Ø F±0,2 A/A F SKP MINIATURE DESIGN | SIZE 1. See dimensions W and h in Figure 1. 442 2-5/16. The purpose of the interference fit with a keyed shaft is to axially locate the. In ANSI keyboards, the left shift key is one large wide rectangular key. Transeals keyway chart Standard and metric keyway broaches Keyway standard dimensions keyseat pdf information printer friendly. Metric External Table Chart Thread Designations Sizes M 1. STANDARD DESIGN | SIZE 15 - 1,500 WITH CLAMPING HUB 5 - 1,800 Nm N ISO 4762 Ø B / BF Ø F ±0,2 Ø E h7 Ø O 1 Ø O 2 h7 Ø D H7 R L/LF C A/A F H I depth J K M shown displaced Ø G P Ø O DIN or ANSI keyway optional MATERIAL Clutch system: hardened steel Clamping collar: up to size 500 aluminum, size 800 and up steel DESIGN With. 2 Woodruff Key Size Table Chart ANSI B17. 4375 1. Standard and metric keyway broachesStandard keyway sizes chart Keyway. 314 Maximum 3. ANSI Woodruff Keys. Max. all dimensions in inches. , depending on the lock nut size Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. A sprocket with an internal parallel keyway. ja 10 – 24 60 sh, sds, sd 1/2 – 20 108 sk 5/16 – 18 180 sf 3/8 – 16 360 e 1/2 – 13 720 f 9/16 – 12 900 j 5/8 – 11 1620 m 3/4 – 10 2700 n 7/8 – 9 3600 p 1 – 8 5400 w 1 1/8 – 7 7200 s 1 1/2 – 7 9000 warning: use of anti-seize lubricant on tapered cone surface or on bolt threads whenRe-design the shaft shown below to be a uniform,Standard keyway dimensions Woodruff ansi keyway fasteners nominalKeyway shaft coupling hole service modification additional tapered parallel couplings. 000 +. Shaft Diameter vs Key Sizes Design Recommendations. 3mm 2. C +0. 30 2. ΔTo (Incl) 3 1/2 Square and 7 Rectangular key widths. 0% 0% found this document useful, Mark this document as useful. To add a hole callout: Click Hole Callout (Annotation toolbar), or click Insert > Annotations > Hole Callout. ansib171967r1998-Keys and Keyseats-Establishes a uniform relationship between shaft size and key size for parallel and 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 — Inches Shan 6. 1 Standard Keyway Dimensions; Torque Ratings; Service Factors; ANSI B18. 2. Standard Bore and Keyway Tolerances (Inch and mm) Keyway Bore Diameter Size Bore Reference -0. . Keyless hubs are often specified for high speed applications to improve the balance of the assembly and to secure the hub to the shaft. Gear Products and Suppliers | Gear Knowledge Menu Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. Woodruff dimensions standard keys table inches ansi given. Shaft Keyway Shear and Yield Strength Formulae and. 3. Cut precision keyways. All sizes are in inch units. As noted above, when selecting a keyway tolerance, there are two common selections in the metric system. com-2023-11-08T00:00:00+00:01 Subject: Ansi B17 1 Standard Keyway Dimensions Lowellcorp Keywords: ansi, b17, 1, standard, keyway, dimensions, lowellcorp Created Date: 11/8/2023 4:51:24 PMDIN or ANSI keyway H Ø D H7 Ø EØ O 2 h7 R ISO 4762 J L SLP WITH KEYWAY CONNECTION 10 - 700 Nm MODEL SLP SIZE 30 60 150 300 Adjustment range* from - to (Nm) T KN 10-35 30-80 40-135 30-80 60-120. Press it into place for use in high-torque applications or to replace a key in a worn keyway. The intent of this document is to offer designers and users of flexible couplings preferred dimensions, tolerances and fits for metric bores and keyways. 2; ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. 396 Maximum 3. Most manufacturers of sprockets conform to the ANSI (American Standards Institute). Ansi B17 1 Standard Keyway Dimensions Lowellcorp Recognizing the showing off ways to get this ebook Ansi B17 1 Standard Keyway Dimensions Lowellcorp is additionally useful. Simply stated, the Imperial Woodruff Key Keyway Dimensions is globally suitable with any. Oversized Key Stock Assortments. 1” and Less +. Max. 1 - Keyway_Dimensions For Later. One set screw is located over the key and one is located 90 degrees to the key for locking onto the shaft. Parallel Metric Keys and Keyway Dimensions - Roy Mech. Both dimensions, h. ANSI/AGMA 9002--A86, Bores and Keyways for Flexible Couplings (Inch Series) ANSI/AGMA9005--E02,IndustrialGearLubrication ANSI B17. 1. ANSI Approved: No DoD Adopted: No Document History: ISO 2491 (Complete Document ) Not Active Currently Viewing. *Hub size may require smaller setscrews in some instances. - Series EL couplings supplied with Nominal key size b × h Applied shaft diameter d Key size Keyway size; b h c or r Standard size of b1 and b2 b1Tolerance （h9） b2 tolerance （E9） r1 and r2 t1 t2; Standard size Tolerance（h8） Standard size Tolerance(h10) Standard size Tolerance Standard size Tolerance; 4×4: 10 or more and 13 or below: 4: 0 -0. Reduce the ID of sprockets, pulleys, and gears in low-torque applications. 5, Dimensioning and Tolerancing, was adopted on 9 February 2009 for use by the Department of Defense (DoD). 240 0. They may be mildly magnetic. I would be curious about how your depth value got there. Durable. For technical drawings and 3-D models. Shaft keys are important machine components designed to. 1 Square Keyway Tolerances. - Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. NA0139, Revision 1, February 29, 2012 - KEYWAY AND KEY SLOT DIMENSIONS METRIC. pdf), Text File (. This revised version of the standard includes an extension of the bore sizes (through 18A key is a machine element used to connect a rotating machine element to a shaft. They have two set screws and a standard ANSI keyway, except 1/4", 3/8", and 1/2" bore sizes do not have a keyway. 000 1 1/16”. All dimensions are given in inches. Page 6 of 6. 3. The tolerance zone for shaft keyway width b with normal fit is ISO N9 and with close fit ISO P9. AGMA ISO 10064-6-A10. Motor Mass Torque Equation and Calculator. 000 / +0. Page 7/11Ansi B17 1 Standard Keyway Dimensions LowellcorpAs this ansi b17 1 standard keyway dimensions lowellcorp, it ends upTo get a quote on #60 roller chain sprockets or if you have any questions please contact us and we will be happy to assist you! Phone: (407) 347-3519. G&G Manufacturing Company 4432 McKinley Street P. There is also a calculator to calculate the press fit force, required temperatures for shrink fit. 4 and round result to two decimal places. Schlage C Keyway, Schlage E Keyway, Schlage S123 Keyway. Hardened teeth give these steel sprockets increased wear resistance for a long service life. 0 = m * z = 22. 004 - 0. Keyway sizing chartKeyway chart sizing key machine engineering keyways shaft Standard keyway sizes chartTranseals keyway chart. Normally, gear drawings include a table of information, called cutting data, for manufacturing. All dimensions are in inches. Frac. each opening in a facility. 1 Square Keyway Tolerances 3/8 . As you may know, people have search hundreds times for their chosen books like this Ansi Standard Keyway Sizes Pdf, but end up in malicious downloads. 202 to 1012 Height Width Diameter Actual Length Full Radius Flat Bottom Distance Key Below Center No. A Hole Callout is inserted and the Dimension PropertyManager appears. 3-2003. PFEIFER INDUSTRIES, LLC. 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. Merely said, the Ansi Standard Keyway Sizes Pdf is universally compatible with any devices to read keyway chart hallite web keyway chart the following tables show standard dimensions for keys and their grooves metric rectangular b s 4235 part 1 1972 imperial rectangular b s 46 part 1The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. 6 Schlage Keyway Guide 8 Cores 9 Key Systems Overview 11 Everest Keyway Family Overview 13 Primus XP Key Control Levels. 7530 3. KEY SIZE VERSUS SHAFT DIAMETER For a stepped shaft, the size of a key is determined by the diameter of the shaft a t the point of location of the key, regardless of the number of different diameters on the shaft. D. 5 ADOPTION NOTICE ASME Y14. ANSI/AGMA 9112-B14 describes sizes and tolerancesSlightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. This standard is not included in any. 2; ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. ANSI sprockets typically do not last as long as their European counterparts due to smaller tooth pitches but have a clear mathematical theme and simple design. Bore and Keyway dimensions comply with ANSI/AGMA 9002-B04 Standard. ANSI-B17. Chain. Woodruff key details Hell s Confetti. I would reluctantly recognize and accept the ANSI depth symbol and a numerical value applied to the length or the width of the slot.