Series 1 Series 2 P7 N7 N9 M7 K7 J6 J7Engineering Fits. Standard. Free running fit not for use where accuracy is essential, but good for large. H7/h6. 25 - M 1. Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque. Keyway Js9 Tolerance Chart Pdf Getting the books Keyway Js9 Tolerance Chart Pdf now is not type of inspiring means. Also see Table of Shaft Tolerances per. W = d/4[clarification needed] H = 2d/3[clarification needed] where. In stock and ready to ship. All internal calculations are done using metric millimeters. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble. 6 or below. The chart (Figure 3-1) below shows a comparison of the droplet sizes of various types of metalworking fluids. web keyway js9 tolerance chart the keyway broaches made of hss in tolerancejs9 p9 h9 according to din 6885 are furnished with shims and for the use on materials up to hrc30 br285Metric Keyway Broaches High Speed Steel & TiN Coated Keyway Width (mm) Broach Dimensions (Inch) Standard Keys (mm) No. BS ISO 4156:2005_1: Straight cylindrical involute splines. 5 standard is considered the authoritative guideline for the design language of geometric dimensioning and tolerancing (GD&T. The position of keyways should be specified within inner dimension (L-F-S) of a retaining ring. Unless otherwise specified, the shaft keyway is assumed to be standard. BS ISO 4156:2005_1: Straight cylindrical involute splines. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. The key length should be less than about 1. 5~ X. clearance. ISO/TC 14. H is the key height. The ANSI B4. The bushing system described in this standard is limited to systems having the following characteristics:. [3/31/23] Straight Rotary Shafts with Key Grooves are available in 1045 Carbon Steel and 304 Stainless Steel, with the following options for Surface Treatment : Black Oxide, and Electroless Nickel Plating or No Surface Treatment. Standard Keyway Tolerances Up through 1/2" +0. ISO/R 773:1969. Table II reflects interference fits used for NEMA-frame-size motor shafts. 2 Keyways - Dimensions for keyways are given in Table 3. 5 +10 +14 +60 +12 +16 +20 +28 +39 +60Keyway dimensionsKeyway sizing chart Metric stepper motor shafts size data tableMetric key keyway dimensions per iso/rtt3 js9 width. 002" and causing problems assembling. 94 6. The hole basis fits have four preferred hole tolerances (H11, H9, H8, and H7); the shaft basis fits have four preferred shaft tolerances (h11, h9, h7, and h6) as shown in Table 6-1. The interference fit standard for most couplings made of medium-carbon steel are 0. As in the example above, this requires looking at part alignment and specifying tolerances referencing fit and function. keyways available upon request. js9 width. Fit Charts. The lower Limit for the shaft = 39. 003-0. keyways available upon request. 312 / 2. Class V Locational Interference Tolerance Table Chart; Class II Fit Free Fit Tolerance Chart for Holes and Bolts per McDonald Douglas Design Guide "Machining Tolerances". 095 . 74By correctly interpreting which standard a PT component was made to, you can solve replacement specification problems and eliminate expensive special ordersNumber of keyways are selectable up to 3. 1 Standard. The second is a P9 tolerance. Keyway (Shaft. 35 7. Metric module, side fit. The hole basis fits have four preferred hole tolerances (H11, H9, H8, and H7); the shaft basis fits have four preferred shaft tolerances (h11, h9, h7, and h6) as shown in Table 6-1. Standard Bore and Keyway Tolerances Inch and mm. M 1. 6. 005 X. 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. ASME B1. 1 tolerance charts are provided in thousandths (. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. Bonus Tolerance Example: Let’s look at a bore of 1/4″ +/- 0. With tight tolerances and top-quality materials, our keys and cores set the standard for security and functionality. 062 0. XX 0. The combination of angular and parallel misalignment within a system may be more detrimental to the coupling and equipment thanNotes: Inch bore and keyway tolerances conform to ANSI/AGMA 9002. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Keyway (Hub) Radius r. Metric key keyway dimensions per iso/r773. Blog GD&T Quiz Print Reading Quiz Guide to Team GD&T Training Orthographic Projection Chart Drill Tap Chart ASME Y14. A position tolerance is the total permissible variation in the location of a feature about its exact true position. 653, the lower limit (smallest value) is 16 (A) Direct limits 4. center of the keyway. 004=0. 1 Size Shaft Dia. Hole-Drilling , Tolerances , Fitting. Type: Refer to page 3 and select the appropriate coupling type . 1. shaft tolerance table (iso) ≥ ＜ b10 c9 d8 e7 e8 f7 g7 h6 h7 h8 js7 k7 m7 n7 p7 r7 s7 t7 - 3 +180 nema quick reference chart nema frame de2f h nop uvaa ab ah aj ak ba bb bd xo tap 42 2-5/8 1-3/4 1-11/16 9/32 1-1/2 54-11/163/8 1-1/8 3/84-1/32 1-5/16 3-3/4 3 2-1/16 1/84-5/8 1-9/16 1/4-20 slot 48 3 2-1/8 2-3/4 11/32 1-7/8 5-7/8 5-11/161/2 1-1/2 1/2 4-3/8 1-11/16 3-3/4 32-1/2 1/85-5/8 2-1/4 1/4-20 slot Coupling Interchange Chart Gear Couplings QF25x2-1/2 (hub size followed by bore size). 6. Fit Types. Coneflex Couplings Center; Key Stock Center;. 18-8 stainless steel key stock offers a balance of strength and corrosion resistance. The hole basis fits have four preferred hole tolerances (H11, H9, H8, and H7); the shaft basis fits have four preferred shaft tolerances (h11, h9, h7, and h6) as shown in Table 6-1. Parallel keysKeyway shaft roymech tolerance Shaft standard key sizes rectangular gates keys diameters most non std readily availableParallel metric keys and keyway dimensions. A position tolerance is the total permissible variation in the location of a feature about its exact true position. 00 ± (B) Tolerance values Figure 4. 3 DIMENSIONS AND TOLERANCES OF KEYS AND KEYWAYS See the figure and the table on pages 2 and 3. Keyway Size Chart - Farrell BearingsBS 4235-2:1977, ISO 3912-1977: Specification for metric keys and keyways - Woodruff keys and keyways. i always thought internal keyway should be within . Minimum Hardness. Metric External Table Chart Thread Designations Sizes M 1. 469 Minimum 3. 001 mm ) d9-20 -45Open ISO 286 Table of Shaft Tolerances Calculator. Specification. T Metric trapezoidal thread, 7H: ISO 2903 Axial run-out locating face/thread: 0,06 to 0,16 mm max. DIN 174. 025 = 39. Rockwell B50. DIN 6888. in Machine Elements & Structural Engineering. NOMINAL SHAFT DIAMETER. Axle keyway symmetry somascope method: by measured workpiece diameter, regulate the position of diameter adjustment bar, adjustment lever meter gauge head angle, by differential head slow astern segment distance, the fixing gauge head of instrument is hung over the side of measured axis keyway, and make the lopsidedness. As with all functions of the Machinist's Calculator, linear values can be. 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. js9 width. Durometer 85D. ISO/R 774:1969. If you don’t. Straight-sided splines for cylindrical shafts with internal centering — Dimensions, tolerances and verification. 1. S. Iso Keyway Tolerances P9 Pdf Right here, we have countless ebook Iso Keyway Tolerances P9 Pdf and collections to check out. Each tolerance has a maximum and minimum. Key Depth Tolerance is +. 3750. 90 2. Minimum Hardness. 018 * 0. A key is a machine element that is used to join a rotating machine element to a shaft. Aspen Fasteners offers the following sizes for immediate delivery from stock: Diameters ranging from M5 to M14 and up to 90mm long and available in 316Ti stainless steel. ISO-TOLERANCE h9 (SLIP FIT) MATERIAL: C 1045 DIN 6880 Key/Flat Stock Hex Rod MATERIAL: C 1045 (replaces former C1028) Size mm 2X2 3X3 4X4 3X5 5X5 4X6 6X6 7X7 5X8 7X8 8X8 10X10 6X10 8X10 12X12 6X12 8X12 14X14 6X14 9X14 10X16 16X16 7X16 11X18 1 Meter Lengths (39") 0. However. 010 Height (d) (t) - DIM Keyway Width (w) AGMA 9002-A86 Inch Bore and ANSI B17. ISO/TC 14. The drive shaft diameter is 4 . WIDTH. 53 6. 093 / . 92 3. 25-0. 8 38. 010 Height (d) (t) - DIM Keyway Width (w) AGMA 9002-A86 Inch Bore and ANSI B17. 2-1967 (R1998) - Engineers Edge. CLOSE RUNNING: For accurate location and moderate speeds. Note: 2. About Keyway Broach Tools. 1265 0. 5. by Crystal Bemis on August 1, 2022. ANSI B17. Example 2. 628 2. 125. Metric key keyway dimensions Keyway metric dimensions key iso tolerance js9 r773 width per depth hub t2 height radius text mill question answered hasn Shaft diameter solid keyway uniform shown re text below factor gears safety transcribed show Tolerance b Hub keyway b Shaft keyway for tight fit P9 P9 for loose fit JS9 N9 for sliding D10 H9. 1875 0. ISO Hardware Specifications Table. In October’s column, I mentioned the typical tolerance for key- ways. Check hubs, shafts, and keyways for burrs. 8 Lovejoy machines the bore in all Lovejoy Jaw style hubs with ‘metric’ dimensioned straight bores and keyways to meet the ANSI/AGMA 9112-A04 Standards’ tolerance forMain Key / Keyway Polarization Blue Stripe 0. Rectangular Keyways Metric; WXHKey W x T2 Keyway ISO Standard — mm Snart Dlameter WI dth Groove dimensions keys DIN 6E-ga Shut 1 (With • 1972. †. 625 / . 80. 3 10 8 39 44 12 3. a keyway and a keyseat, which is a slot and pocket in which the key fits. 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. Statistical Tolerance. 039 mm. 006" # Tolerance each on T1 and T2 (16"-20") is-. 010/-/000 for all standard keyways. 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. Lid Chart. In a case where a rotor like a sprocket is radially centered by . 010 0. S. 18. ex: H11. 5-6H/6g. BOTTOM OF SHAFT TO BOTTOM OF KEYWAY. Keyway dimensions table aii. 625″ OD, For Split Taper Sprockets & Sheaves. It covers the principles of bearing selection, the bearing interfaces, the tolerances and resultant fits, and the lubrication and sealing systems. H7/g6. Bore Size Chart. 314 1. BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements. Shaft ends Diameter tolerance: Center bores according to DIN 332, shape D [in], shape DR [mm]: Keys: according to DIN 6885. Two PDFs. 0010". I -I w*l-8-4 GIB HEAD TAPER Over I I. Keyseat Alignment Tolerances: A tolerance of 0. 120. 5 m (500 mm) Lengths (19. This is an undersized clearance. , depending on the lock nut size Mounting slots according to DIN 981 HM/HME and HM . 01 A1-800-ASK-4WEG Sales 1-800-839-2529 Warranty 1-800-ASK-4WEG After Hours Sales Select after hours option 1-877-WEG-DRIV Drives Tech Support NEMA Standard Dimensions IEC Critical DimensionsBased on standard tolerances and limit deviations in accordance with ISO 286. 050 R Typ 0. ANSI B17. 25 m (250 mm) Lengths (9. ISO 286. Check out this Dowel Pin Slip Fit Tolerance Chart for further consideration on slip fit tolerances. 3. Keyway key parallel jis sizes tolerances 1301 mm 1996 pulley excerpt unit techKeyway metric Table aii-12. Design of Square Key and Keyway (Wood Ruff) Stress, Shear. 500" The runout table roll diameter is 5 250" with a keyway of 1 250" x 0 625" Maximum shaft gap is 7 00" long 1 . We additionally allow variant types and in addition. QUICK FLEX® with black insert high-speed split cover Part # Torque Nm Max Bore mm Part # Torque Nm Max Bore mm 1035G 16,373 124 QF1000 35,081 140 1040G 24,915 146 QF1000 35,081 140 1045G 34,169 171 QF1890 62,597 175 Falk® Gear Type GL52 - Single Engagement ISO 2768-1 stands for the general tolerances for linear and angular dimensions without individual tolerance indications, ISO 2768-1 indicates the linear dimensions and angular dimensions such as external sizes, internal sizes, step sizes, diameters, radii, distances, external radii, and chamfer heights for broken edges. d. Keys and keyways secure the hub and shaft to prevent relative movement between a power transmitting shaft and an attached component. S2=Tolerance of h× 2 1 S1=Tolerance of b× 2 2. +40 0. 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. . 2Iso 286 tolerance fit chart pdf When designing an engineering product the fit required and the appropriate tolerance must be determined. The standard tolerance for the shaft of grade 7 (IT7)= 16 i= 16 × 0. A list of standard keyway and corresponding key sizes for English shafts are listed below in Table 1. Select the Material. 000 -0. 1-1967, R1989) Metric Square & Rectangular Parallel Keys & Keyways (B. View available parts by clicking on the following link: DIN 6885 Parallel Keys High Type “A”Machine Key Comprehensive Guide. These size charts do not compensate position or other GD&T location tolerances. 025 = 39. 05 FSO 600/2. , New Berlin, WI 53151-7953 USA Telephone: 262-796-4060 August 2003 Fax: 262-796-4064 e-mail: [email protected]: 0. It is a precise language that allows for consistent interpretation of a drawing. ISO/TC 14. Pivots, latches, fits of parts exposed to corrosive effects, contamination with dust and thermal or mechanical deformations H9/C9, H9/d10,H9/d9, H8/d9, H8/d8,D10/h9, D9/h9, D9/h8 Running fits with greater clearances without any special requirements for accuracy of guiding shafts. Technical drawings often include notations such as “50 g6” or “17. There many standards that cover the topics of metric bore tolerances, fits and keyway sizes. g. The webpage also links to a technical data sheet for slewing bearing. Our Online Calculator streamlines this process and provides a detailed final result immediately. 032 * 0. 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. 120. Mechanical Tolerance Chart Data. In this case, the torque that can be transmitted when a key is added to the shaft is approximately 12 percent lower than the torque that can transmitted by the plain shaft (393 Nm vs 447 Nm). 975-0. $17. A tolerance is described using a letter followed by a number. However the control of the width in this case is superceeded by the tighter parallelism callout. WIDTH. W is the key width. 2. 1/16" 3/32". Gear Products and Suppliers | Gear Knowledge Menu. 53 9. The dimensions and tolerances of keys of sizes 4 4 to 40 22 covered in IS : 2048-1975 were exactly the same as those covered in IS : 2710-1975, which specification was applicable to machine tools. Keyway (Hub) Radius r. 1 9 3 +0. Only the range of key lengths and dimensions of keyways differed for machine tool applications. this one. 19-1997 ; Keyway Stresses for Non-metallic Gears and Shafts. Recommended ANSI Standard Keys and Keyseats Design per. 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 7 1/2 9 Square Keys preferred for shaft diameters above this line: rectangular keys, below Key 3 3/4 4 1/2 5 1/2 Shaft Key Size Versus Shaft Diameter ANSI B17. Pivots, latches, fits of parts exposed to corrosive effects, contamination with dust and thermal or mechanical deformations H9/C9, H9/d10,H9/d9, H8/d9, H8/d8,D10/h9, D9/h9, D9/h8 Running fits with greater clearances without any special requirements for accuracy of guiding shafts. The following is listing of those standards: Standard Description BS4235 P Woodruff keys and keyways – same as ISO 391 BS46P1 Specifications, Keys and Keyways – obsolete CSAB232 Keys and Key seatsNSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. Bore Size Identification System. MIKI PULLEY Clutch and Brake Standard Hole Drilling Standards. Referencing Figure 1, the keyway dimension is W x T1. Semi-circular pocket in the shaft directly cut by woodruff key cutter. 3 Preferred length and weight of keys - Preferred length and weight of keys is given in Table 4. 050 +0. The commonThe keyway is a longitudinal slot in both the shaft and mating part. Bore Size Identification System. Symbol. Keyway broaches are used for producing keyway-shaped holes in a workpiece. Two PDFs with useful engineering data on keyway sizes and engineering limits and fits, just download. 1-1/16 1-1/8 1-3/16 1-1/4 1-5/16 1. key. XXX 0. 65) Nominal dimension Tolerance Zones over to U7 S7 R7 P7 P9 N7 N9 M7 K7 J7 JS9 H7 H8 H11 G7 F7 F8 E8 E9 D10 deviations in µm 1 3 -18 -14 -10 -6 -6 -4 -4 -2 0 +4 +12. Undersized. Insert Arrangements Shell Size Designator Insert Arrangement. The keyway is a longitudinal slot in both the shaft and mating part. Surface Finish — Sides and bottom of keyways shall not exceed 250 micro inches. S1 S1 S1 l 6. When used correctly, it can help reduce scrap, rework, and delays in production. The advantage of the Js9 tolerance is that the key can be inserted and the gear manipulated without much difficulty. ISO Bore Tolerance Chart For bore tolerance system, Nominal sizes from 1 - 160mm DIN 7160 (8. 0. 3mm 2. The tolerance system for metric threads is composed of a two sets of a number followed by a letter. 0 +0. . If you are looking for a comprehensive and reliable source of information on jaw type couplings, you should download the Jaw Type Catalog PDF from Lovejoy, a Timken company. 3 5 5 18 22 6 2. web keyway js9 tolerance chart the keyway broaches made of hss in tolerancejs9 p9 h9 according to din 6885 are furnished with shims and for the use on materials up to hrc30 br285 tolerances h11 h9. Slip fit tolerances are ideal for when the part needs to functionally slide (e. Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble. 02 0. Rockwell B87. General dimaensional tolerance of cut width Unit:mm Table 2. 2 Woodruff Key Size Table Chart ANSI B17. 437 / . 000" Newsletter. dIt is used in non-mating assemblies like bearing bushes fitted into the bearing housing, key fitted into the keyway, etc. Subscribe. The first set indicates the pitch diameter tolerance, and the second set indicates the major diameter tolerance. Rotary Shafts - Straight with Keyway Grooves. 13. 5: 4 +0. For a key to function, the shaft and rotating machine element must have a keyway and a keyseat, which is a slot and pocket in. tolerances. Cross-section of a parallel keyed joint. The 10% Rule is intended to assist in the selection of the tolerance for Go & No-Go gages. 2Keyway chart. 1 SCOPE. 062 0. dimensions standard keyways keys r773 pdf bores shaft hub depth diameter standards engineering table edge widthKeyway tolerances bore Keyway dimensions table aiiShaft standard. American system, the keyway in the hub is dimensioned by the width and the depth at the side, but in the metric system the keyway is dimensioned. The primary function of keys and keyways. web keyway js9 tolerance chart the keyway broaches made of hss in tolerancejs9 p9 h9 according to din 6885 are furnished with shims and for the use on materials up to hrc30 br285 tolerances h11 h9 h7 and h6 as shown in table 6 1rpm at the motor base speed . 1 Tolerances Shaft heights The following tolerances apply to the indicated dimensions: Foot-mounted gear units: Check the motor diameter because it may project below the mounting feet and require shimming below feet. Here, you can find detailed information about these machine elements. 095 . 1 0 : 5×5 In October’s column, I mentioned the typical tolerance for key- ways. Referencing Figure 1, the keyway dimension is W x T1. Select the Machine. DIN 6880. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. The upper limit for the shaft = Lower limit for the hole (Basic Size) – Fundamental Deviation. 3 S2 6. Frequently Used Fits. 438 . Depth values for shaft keyseats - hub keyways Fit tolerances for parallel and taper keys Gib head dimensions for taper keys Key size versus shaft diameter Set screws for use over keys Parallel and taper key dimensions and tolerances Woodruff key sizes and dimensions Woodruff keyeat dimensionsThe following ISO Tolerance Chart for bolts and holes per ISO 286. Straight Sided Spline Dimensions. 4 LHUB LENGTH~W~ LHUB LENGTH&W*A PLAIN TAPER kwi ALTERNATE PLAIN TAPER Plain and Gib Head Taper Keys Have a 1/8" Taper in 12" Table 2 Key Dimensions and Tolerances NOMINA1 KEY Parallel Taper +HUB LENGTH '1 HB/2 APPROX . A tolerance is described using a letter followed by a number. 0. 8mm 2. Woodruff keys work well near shaft shoulders and on tapered shafts. 4. 4 31. 2-1967. 3- Special case for M6 from 250mm to 315mm tolerance. This cylinder has two 3/32” diameter ball bearings on each side of the keyway. 0. GD&T also allows for manufacturability and inspection of a product. W = d/4[clarification needed] H = 2d/3[clarification needed] where. 6 - 8 - 10 - 12 - 14 - 16 - 18 - 20 - 22 - 25 - 28 - 32. This is a ± band clearance where the value of the tolerance is equally oversized or undersized. Key. 3 6. all dimensions in inches. C +0. - Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. Keyway (Shaft. 3/8 . Keyways are British Standard Metric BS 4235: Part 1: 1972 DIN 6885 and conform to ISO recommendations with the exception of those marked* which are shallower. Get a quote +61 7 3271 5424. Tolerance Rating. 025mm) interference fit. - Series EL couplings supplied with Taper metric dimensions keyway key bs 1972 keyways keys. 002 -0. You could not by yourself going with books store or library or borrowing from your contacts to way in them. Question: Metric Key Keyway Dimensions Per ISO/R773. 002" and causing problems assembling. 3125 0. ISO/R 774:1969. XXXX 0. 40. 010. RoyMech Resources Keyways Taper Metric Key and Keyway Dimensions These Pages include various standards. 5mm Keyway Depth, Type H Sprocket Bushing. 2-1978 standards. - The maximum tolerance describes the. No external keyStandard Keyway Dimensions Shaft Diameter Set Screw Width Depth Up through 7/16" 8-32 3/32 3/64. Contact. Advice from lecturer: "Be warned - when you go into industry your boss will give you a thousand things to do and he wants them done. Keyway Js9 Tolerance Chart Pdf INTRODUCTION Keyway Js9 Tolerance Chart Pdf . 'Keyway Tolerance Chart PDF documents docucu archive com April 21st, 2018 - Keyway tolerance chart PDF results Shaft Do not scale metric din 6885 1 c js9 keyway all dimensions are in mm set screw length øa depth 10 4 11 4 12 8 13''Keyway Dimensions Armstrong MetalcraftsWhen a keyway is damaged, cut a new, wider one. (1) d b1 b2 b1. - The maximum tolerance describes the. For more exact dimensional data, please check the specific drawing for each catalog number. b x h width x thck. 000 Over 1" +0. Keyway Js9 Tolerance Chart OMB No. Each tolerance has a maximum and minimum. T = 393. • Define the cylindricity tolerance. Symmetry, which regulates the symmetry against the datum, is measured using a caliper, micrometer, or a coordinate measuring machine. 000 Keyway Depth ( t ) All sizes +0. The lower Limit for the shaft = Upper limit for the shaft – Tolerance For shaft. Keys and Keyways: Dimension charts for Keys and Keyways: Limits, fits and tolerances calculators: Calculates the limits, fits and tolerances according to ISO 286(2010), ANSI B4. 6 - M 18. .