For example, clearances fits ranging from loose to precision sliding fits. Product Question. Frequently Used Fits. Find the ISO/R773 - Js9 specifications for metric keyway. B +0. txt) or read online for free. 0. SHOW MORE . KeyWay /Key Dimensions. Subscribe. Hubs will be supplied unbored, unless specified. ISO 286. 0. These standards call for the expanded use of symbology in annotation. 006" # Tolerance each on T1 and T2 (16"-20") is-. 4 Coupling Interchange Chart Gear Couplings QUICK FLEX® with black insert high-speed split cover Part # Torque Nm Max Bore mm Part # Torque Nm Max Bore mm 101 1,140 44 QF25 1,407 50 101-1/4 1,756 47 QF50 2,992 60Woodruff Key Assortments. Figure 1. The key is screwed on the hub but it should freely slide on the shaft in the axial direction. Open navigation menuGet In Touch. heavy type Keyway width P9 tight fit (standard design) JS9 or N9 loose fit (requires written agreement) see also. 001) of an inch. The Lovejoy Engineering Data catalog has been assembled assist in selecting coupling products and solutions. 342 Minimum 3. Fit regarding height. 636" off the lower horizontal edge of part. If keyways in shaft (How many, Size and tolerance, Radius required in keyway, Location tolerance of keyway respective to bore and other keyways) Types of Interface Information Required for Bolted Joints 1. sion of key b×h. What are the dimension and tolerances we should use for the keyway?Shaft Keyway Width Maximum Tolerance. 4- Some internal Grade values must be rounded down to a precision of 3 decimal metric millimeter precision. 4 3 3 11 12 4 1. 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 seats Keyseats and Keyways. ). 1236. Adriaan. MUHAMMAD USMAN. Key dimension. Loose running fit for wide commercial tolerances or allowances on external members. These have their associated tolerances as well. 001" / - 0. Close suggestions Search Search. Avoid tolerance buildup by dimensioning from another dimension, as cumulative tolerances will lead to dimensional errors. In October’s column, I mentioned the typical tolerance for key- ways. 000″. 015-0. 332 Maximum 3. Parallel keys DIN 6885 are only available in packing units of 50 pieces per size and length. Machinery s Handbook Woodworks Library. BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements. close menu Language. WooHoo! You subscribed successfully. 010" for all sizes above. Shape and dimensions of parallel key and keyway. Alignment is shown using. Keyway Width (w)Mechanical Tolerance Chart Data. 005" up to 1/4 and 0. 0010. 125 +. The shaft keyway and hub keyway dimensions according to ISO 6887 - taper keys with gib head - are equal to those in ISO 6886. keyway tolerances not specified shall be in accordance with as81935/3 or nas 513 as applicable. 625 / . Keyways and Setscrews” (page 219) 2) Keyseating in definite location 3) Keyseating in line or in pairs Setscrews One pair furnished More than one pair Up to and including the standard bore sizes that are 1) Oversize bores Boring listed in the sprocket tables. 1 10 121 4 4 R0150 0150 1 8 1. Keyway chart diagram halliteMetric keyways keyway tolerances parallel woodruff bs ering Keyway standard dimensions keyseat pdf printer friendly informationKeyway broach hss cnc push cutting inch machine type. 1. A rounded bottom allows these keys to rock in their seat to relieve stress on the shaft caused by vibration or misalignment. A broached keyway in the end of an adjustable wrench. 5 + 0. Unless otherwise specified, the shaft keyway is assumed to be standard. ISO Tolerance Zone According To According To According To According To According To According To; h9 h9 h11 min max DIN 6881 DIN 6883 DIN 6884 DIN 6885 DIN 6886 DIN 6887 DIN 6889 (8 x 7)Notes: Inch bore and keyway tolerances conform to ANSI/AGMA 9002. Undersized. 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. The table shows the nominal key size, the applied shaft diameter, the key size, the keyway size, the standard size. Bs keyway 1972 1986 tolerances metric british standard pdf. Machining Tolerances Calculator limit amp fit hole shaft. The s i z e s and tolerances contained groove in a sha€tor hub. New diameter sizes (13, 16, 17, 18 and 22) are added for h9 tolerance types. 095 . 01" to your slot, it could be impossible to assemble a rigid, symmetrically located key. Shaft tolerance for diameters not defined by ISO 286-2. the spline connection, then major diameter transition fit (or interference fit) according to ISO (outside shaft diameter toler-ance H7 and major internal diameter tolerance n7 (or H7/p7tolerance unless otherwise specified dimensions comply with din 6885 1 requires use of chamfered keys surface finish sides and bottom of keyways shall not exceed 250 micro inches see page 2 for optional p9 d10 keyway. It has a positive value and is represented by a number. Hubs will be supplied unbored, unless specified. 4 Keyway Dimensions and Tolerances. 1 - 1972 # Tolerance each on T1 and T2 (1" -14. To broadly and briefly touch on bore and keyway standards, the North American (inch/imperial). Keys shaft rectangular types key chart hub designs tapered machine selection5/8" od keyed shafting with a 3/16" full keyway Metric key. Drilled Spanner. Mechanical Tolerance Standards Menu. Keyway Dimensions Key Dimensions The inch and metric. txt) or read online for free. The following tolerances for maximum lead (due to angular displacement of keyseat centerline from centerline of shaft or bore and measured at right angles to the shaft or bore centerline) of keyseats in shaft and bore are specified: 0. W = d/4[clarification needed] H = 2d/3[clarification needed] where. This standard is a listing of commonly used terms as compiled by the members of the elastomeric coupling industry. 442 2-5/16 2. This is a ± band clearance where the value of the tolerance is equally oversized or undersized. The advantage of the Js9 tolerance is that the key can be inserted and the gear manipulated without much difficulty. We stock pre keyed shafting in many diameters, including metric diameters, with standard keyways. 000 Over 1" +0. 002 -0. Also see Table of Shaft Tolerances per. A Keyway is a slot of some kind that is used to align the part on a shaft and prevent the part slipping as the shaft rotates. ISO 3019-1. Stock lengths from 3 feet to 24 feet. In stock. 1. 708 2. 8 6 6 23 30 8 3. 002" / - 0. 432 / . CR4 Thread Determining keyway size for a shaft. BS 4235-2:1977, ISO 3912-1977: Specification for metric keys and keyways - Woodruff keys and keyways. The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. 0030 4. Improperly fitted keys and keyways -either too tight or too loose- can result in mechanical failures. The symmetry tolerance does two things to the keyway; sets a tolerance for the keyway to be offcenter as well as tolerancing the width. 38 1958. †. 442 2-5/16 2. Series 1 Series 2 P7 N7 N9 M7 K7 J6. Slope Key, Gib Head Key and Key Groove Key Nominal Dimension b×h Dimension of Key Groove Reference Reference Dimension of b1, b2 (Sliding Type) Standard Precision Class r1 and r2 Reference Dimension of t1 Reference Dimension of t2 Reference Dimension of t2, t1 Applicable Shaft Dia. 095 . 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. Home; Metric Keyways Index page; Parallel Keys and keyway Dimensions; Parallel Keys and keyway Dimensions to BS 4235-1:1972 KeyWay & Key Dimensions. (1) d b1 b2. 002 on the key and 0. Key Stock is cold drawn to exacting tolerances with sharp corners, perpendicular and parallel sides, and smooth, bright surface finishes. minimum groove radius r_2. ). Dimensioning and Measurement of a Key Way [ 1] •. 5or more 3 or below Over 3 6 or below. Preferred Tolerances & Fits Chart ANSI B4. Keyways Tolerance - Free download as PDF File (. Standard. 1 Square Keyway Tolerances Minimum 3. Metric Key & Keyway Dimensions Per ISO/R773 – P9 Width Tolerance H. 5 +. This may also be written in this standard are intended for single key appli- a s shaft keyseat or hub keyseat when describing cations only. See Detail. Hex, round, and step profiles are available to mate. Preferred tolerance grade ISO 286; International Tolerance GradesSquare Keyway Tolerances AGMA 9002A86. 3mm 2. DIN 6885/1 :- Definition. Straight-sided splines for cylindrical shafts with internal centering — Dimensions, tolerances and verification. 0625 0. 3 10 8 39 44 12 3. British Standard :BS 46 Part 1 : 1958 Keys and keyways and taper pins. Improperly fitted keys and keyways -either too tight or too loose- can result in mechanical failures. 1 -1967 (2004) standards for metric and inch unit systems. 000/-0. Hub Keyway Tolerance . - Calculate the dimension for programming the depth of the keyseats. In linear broaching, which is the more common process, the broach is run linearly against a surface of the workpiece to produce the cut. If a setscrew is required, drill and tap over keyway as shown in Figure 3. 5 m (500 mm) Lengths (19. 020 0. WIDTH. Keys and keyways BS 46 Part 1 : 1958 Keys and keyway Dimensions-Parallel Rectangular Adve Radius 0. 000" to 0. As noted above, when selecting a keyway tolerance, there are two common selections in the metric system. 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. 1/2" 1/8" 1/16" 0157517 0953110 5/8" 3/16" 3/32" 0157518 0953111 3/4" 3/16" 3/32" 0157519 0953112Check hubs, shafts and keyways for burrs. Quantity. This series of articles on geometric dimension and control will help you in the. by Crystal Bemis on August 1, 2022. That gives me a total clearance of 0. 000 / +0. Timing Belt Pulley - Standard Tolerances. 250 +0. That would give you a line fit in the worst case, but this does not account for the symmetry(or offset) of keyway. 2180 Corporate Lane, Suite 104 ~ Naperville, IL 60563 USA Metric Key & Keyway Dimensions Per ISO/R773 – Js9 Width Tolerance « + Keyways will be furnished per ISO/R773 and Js9 width tolerance unless otherwise specified. By properly following the steps and ensuring the keyway is correctly aligned, one can ensure optimal performance and longevity of the equipment. Message. Packing unit: 50 qty. 1. 332 Maximum 3. When you're done editing, click Done and then go to the Documents tab to combine, divide, lock, or unlock the file. 00075-0. Engineers recommend BS 46, ANSI B17. Ryle, it was originally a machine shop doing general repairs. Mechanical Tolerance Standards Charts. Recommended tolerance fields for key width Table of Contents 1 - General 2 - Usual IEC sizes 3 - Mechanical tolerance 3. broached internal keyway possibly has larger than . Key/Keyway Positions Master Keyway 105° 140° 215° 265° 140° 215° 265° 60° 105° Master Polarizing Key Master Keyway 105° 140° 215° 265° 140° 215° 265° 60° 105° Master Polarizing Key Receptacle Plug Note 1: Shielded, not applicable to Series II or hermetic connectors. Specifying Rectangular Keyways mdmetric com. The rounded ends make it easy to slide gears, hubs, and other components into place. 004-0. 514 and. ANSI B4. Round keyed shafting: 1/2 dia. Standard Bore Tolerances 1" and Less + . . 0005 inch per inch of length for keyseat lengths. 8750 1. • Explain the angularity tolerance. The keys are square or rectangular. Square Keyway Tolerances 3/8 . 2 0. DIN 6885* Keyway, key details Extract Page 2 heavy type for machine tools d b P9 / JS9 Hub keyway b P9 / N9 Shaft keyway h t 1 = d + t 2 t 2 t 3 = d – t 4 t 4 3- Special case for M6 from 250mm to 315mm tolerance. Please note our order discounts. The maximum bore size should be 60% to 70% of the hub diameter (or teeth root diameter), and 50% to 60% for keyway applied modifications. • Explain the circularity tolerance. pdf), Text File (. Feather keys Steel / Stainless Steel DIN 6885 ELESA+GANTER®. Using them in a closed keyway keeps them from sliding along the shaft axis. • Keys DIN 6885 → Page 842 * This standard has been withdrawn without replacement in 2008-10. 3 Preferred length and weight of keys - Preferred length and weight of keys is given in Table 4. The. The increased tolerances recommended in this standard may entail more fitting of keys into keyways than was envisaged in the1953 edition. Tolerance Rating. The calculator has been tested, but no guarantee can be given for the accuracy of the results. 1-1967 (R2013) standards. Minimum keyseat width is that figure permitting the largest shaft. 2180 Corporate Lane, Suite 104 ~ Naperville, IL 60563 USA Phone (630) 596-9000 Fax (630) 596-9002 Along with keyway size tolerances and keyway depth sizes, some standards also provide information on the recommended key size and keyway depth as a function of shaft diameter. , New Berlin, WI 53151-7953 USA Telephone: 262-796-4060 August 2003 Fax: 262-796-4064 e-mail: info@rexnord. Keyway Bushings, Broaches, Tool Bits Keyway Bushings Cont. RoHS. BS ISO 4156:2005_1: Straight cylindrical involute splines. Keyway Dimensions Key Dimensions The inch and metric dimensions here correspond to common values. Shaft diameters for keyed shafts. 015. wing. Advantages of Keyway Broaching on CNC Lathes. Max. Moorland Rd. Reference -0. Based on lecture notes of John Milnor, which first appeared at Princeton University in 1957 and have been widely studied by graduateToday, there are 14 types of geometric tolerances by the number of symbols, and 15 types based on classification. txt) or read online for free. Statistical Tolerance. hub keyway) for tools; thia conforme to DIN 6885 Sheet 2. As noted in it "This is a condensation of the standards on motors included in NEMA Standards Publication Motors and Generators, MG 1-2006. Metric module, side fit. • Key Depth tolerance is +. This is due to the international understandability of symbols. Size Shaft Dia. BS ISO 4156:2005_1: Straight cylindrical involute splines. Dimensioning to three places of decimals, e. 4 0. 1 - Recommended shaft basis fit 3. While a brief overview of misalignment is available. 0. ISO/TC 14. If your shaft and key have some float in them, a rigidly located but possibly off-centre keyway works and could even be a good idea. 40. Metric – Rectangular B. BORES AND KEYWAYS IN. 000 -0. thefutureofbanking. 1 12 4 4 4 13. Select between millimeters and inches the unit of measure the results will be displayed. When a keyway is damaged, cut a new, wider one. Quick Reference uide 6 Standard Coupling NomentureStandard Bore and Keyway Tolerances (Inch and mm) Keyway Bore (inches) Reference Height (d) 1. 3D Printing & CAD. Typical Tolerances of Manufacturing Processes UFL MAE. Table 3 provides the "T" dimension for common bore and key combinations. 125. 1 -0. 1-1967 or JIS B 1301-1996 specify sizes and tolerances of the keys and keyways. RoyMech Resources Keyways Taper Metric Key and Keyway Dimensions These Pages include various standards. Key & Keyway Dimensions - MillimetersEdit couplings hub keyway tolerances. In reply to #10. Information. Lovejoy supplies ‘metric’ dimensioned ‘F’ hub straight bores with bore and keyway tolerances conforming to the ISO 286-2 standards for a P7 interference fit unless otherwise specified. 6 - 8 - 10 - 12 - 14 - 16 - 18 - 20 - 22 - 25 - 28 - 32. When selecting a keyway tolerance, there are two common selec-tions in the metric system. Cross-section of a parallel keyed joint. That combined amount of clearance forgives a few thousandths of off-centeredness to a shaft keyway. • Define the flatness tolerance. i always thought internal keyway should be within . 3 12 8 45 50 14 3. This is a ± band clearance where the value of the tolerance is equally oversized or undersized. This standard is intended to provide dimensions and tolerances, which will permit bushings made by one manufacturer to be used to mount sheaves or other products made by a different manufacturer. Oversized keys create a tight fit. Unit : mm. 000, ~0. S2=Tolerance of h× 2 1 S1=Tolerance of b× 2 2. H is the key height. Improperly fitted keys and keyways -either too tight or too loose- can result in mechanical failures. xls Author: paul Created Date:The tolerance zone for shaft keyway width b with normal fit is ISO N9 and with close fit ISO P9. 2 standards for dimensions and tolerances. Personally the best I can recommend is to stick with the. n Metric keyway tolerances conform to ANSI/AGMA 9112 Normal keyway width tolerance. The first is Js9. 000" + 0. The ideal oversize tolerance for many years was considered to be +. ANSI-B17. 90 edition Tolerance zones shown forTolerance zones shown for nominal dimension 60 mm ISO abbrev. Woodruff Key Number: Wd. 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. pdf | Manufactured Goods | Mechanical. MISUMI. We offer sizes for cutting the most common keyway widths and TiN or TiAlN coatings are available. One-half of a key fits into a (n) ____ in the hub of a gear or pulley. RoyMech Resources Keyways Woodruff Metric key and Keyway Dimensions These Pages include various standards. - Series EL couplings supplied withMechanical Tolerance Chart Data. The following tables report the preferred metric fits and tolerances for hole and shaft basis systems given by the ISO 286-1 (2010) and ANSI B4. 010Bore Diameter Size Bore. Rexnord Industries, LLC, Coupling Group 427-108 5555 S. 4375 . DIN 6885-A A4. DIN 7154, H7 Metric Bore & DIN 6885, Js9 Square Keyway Tolerances | PDF. S. Specification. design and are ground to precision keyway tolerances. Tolerance on Key Length mm. 3144 holes need to move with the keyway feature. i always thought internal keyway should be within . FHDFR. 987, forces the machinist to work to those fine limits. 000 Over 1" +0. Compatible with both multi-task machines and machining centres. The keyway width tolerance numbers from EASA AR100 and NEMA MG-1 and ANSI/AGMA 9002-C14 all seem to match table 4 = class 1 fit. 000" Newsletter. So I made it myself. Material group. ANSI Standard Keyways* Shaft Diamter Keyway Over To (Incl. Industry standards for key sizes in various bores exist for both English and Metric systems. 1 Table Calculator RC - LT Fits. recommendations except for the bore sizes marked* which are shallower. 5. AGMA 9002A-86 Square Keyway Tolerances. The first is Js9. 1 Prebid meeting—While this guide does provide a reasonable overview of concrete floor construction, it should be emphasized that every project is unique; circumstances canMachining Tolerances Calculator - Technical Help. Select between millimeters and inches the unit of measure the results will be displayed. 093 / . We would like to show you a description here but the site won’t allow us. may be specified. 1 Size Shaft Dia. Inch (ANSI/AGMA 9002-B4) Metric (ISO/R773) In October’s column, I mentioned the typical tolerance for key- ways. D. 2) Dimension h of the taper key names the largest height of the key, and dimension t z largest depth of the hub keyway. 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. Where a key is to be used it should be parallel and side fitting with top clearance. Another name for a Keyway is a Keyseat, since the Key is seated in the Keyseat. 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. - Series EL couplings supplied with ANSI-B17. Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque. DIN 6885-NI Feather keys Stainless Steel. 0000 0. Key & Keyway Dimensions - MillimetersHVAC Systems for Rail Vehicles. AGMA 9002-A86 Inch Bore and ANSI B17. If the enduser is using oversize plated keystock, then the properly centered keyway is more important. Bs keyway 1972 1986 tolerances metric british standard pdf Keyway_tolerances. ) Width Depth : 7/16: 9/16 : 1/8: 1/16 : 9/16: 7/8 : 3/16: 3/32 : 7/8: 1 1/4 : 1/4: 1/8 : 1 1/4: 1 3/8 : 5/16: 5/32 : 1 3/8: 1 3/4. No external keyBelow is a reference on shaft diameters and the corresponding keys / keyways according to the prevailing standards. Today, this work is carried out by 23 Active Technical Committees. All internal calculations are done using metric millimeters. REFERENCE DEPTH. 002 for all sizes; for diameter A of shank at gage line, +0. 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. Metric Standard Parallel Keyway and Key Sizes Shaft Diameter (mm) Keyway (mm) Key (mm)* From To Width (W) Depth (h) Width (W) Depth (T) 6 8 2 1. Style - Plain Type Keyway Bushing Bushing Style Diameter Length Part No. E. Mechanical & Motion Systems. A table of parallel key and keyway sizes and tolerances for different JIS standards and diameters. Therefore, to ensure appropriate fit, the width and height dimensions of standard key and keyways must be held to recommended tolerances. The following Engineering calculator will show the plus and minus tolerance for the specific ISO 286 hole tolerance data. Drive Type Fastenings without Taper Action; Parallel Keys, Keyways, Deep Pattern. The Mechanical Power Transmission association creates standards related to the belt drive and pulley, chain and sprocket, and coupling. 8. 2020-04-21 16:00:46. Rectangular sunk key. 10 e. Tolerance Class: Shaft t 1: Hub t 2: Normal: Close: Shaft N9: Hub Js9: Shaft & Hub P6:. AGMA 9002-A86 Inch Bore. Enter your desired preferred tolerance grade and the nomial size. 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. L = length 4. , New Berlin, WI 53151-7953 USA Telephone: 262-796-4060 August 2003 Fax: 262-796-4064 e-mail: [email protected] 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. Find the ISO/R773 - Js9 specifications for metric keyway dimensions, including width, depth, radius, hub, and over-thru dimensions. BS 46 Rectangular Taper & Gib Head KeyWay & Key Dimensions All Dimensions in inches. DIN 6885-1 :- Key, Hub Keyway, Shaft Keyway Details and Dimensions. 3 30 38 10X8 10 3. Ht. 2020-10-13 15:10:33. Table 1 details the appropriate key slot and key sizes for various clearance. 0 +0. 20 , Ø25 0 0 -0. 0125 1. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. 2180 Corporate Lane, Suite 104 ~ Naperville, IL 60563 USA Phone (630) 596-9000 Fax (630) 596-9002 E-mail: [email protected] 4235-2:1977, ISO 3912-1977: Specification for metric keys and keyways - Woodruff keys and keyways. SHOW LESSBased on standard tolerances and limit deviations in accordance with ISO 286. Keys and keyways are used to transfer torque from shafts to holes or vise versa. 628 2. Re-design the shaft shown below to be a uniform,Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k key All torque transmissions resourcesKeyway chart bore resources torque alltorquetransmissions. ISO/R 774:1969. The minimum clearance will be the difference between the. 3 17 22 6X6 6 2. JHG. Coupling Sizes 1020T thru 1090T are generally furnished for CLEARANCE FIT with setscrew over the keyway. Generally, there are two classes of stock available for sunk keys, mainly parallel keys. These calculations can also be done graphically or mathematically. Step Machine Key Stock. 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. This enables the use of standard gages. Steel C45, plain finish. Shaft (Arbor) Keyway Dimension Size Data -. These motors are supplied with Inpro/Seal VBX bearing isolators on both the output and fan shafts. 010" from the as-drawn location, the Ø. The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94. Tolerance.