Fillet radii comply with AGMA 9002-A86. 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. The first is Js9. 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. Standard and metric keyway broachesTable aii-12. 5: 4 +0. 0 +0. l 5 DESIGNATION A pair of tangential keys shall be designated by their. You could not on your own going once ebook buildup or library or borrowing from your friends to get into them. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. 92 7. “Learning GD&T From Scratch,” provided by KEYENCE, walks you through the basics of geometric dimensioning and tolerancing,. Two PDFs with useful engineering data on keyway sizes and engineering limits and fits, just download. 19-1997 ; Keyway Stresses for Non-metallic Gears and Shafts. This Calculator will determine the preferred size and limit tolerances for Running or sliding to interference-locational fits per ANSI B 4. 8") 3 m lengths available. dimensions standard keyways keys r773 pdf bores shaft hub depth diameter standards engineering table edge widthKeyway tolerances bore Keyway dimensions table aiiShaft standard. 006″tolerance chart Keyways Js9 and P9' 'keyway tolerances Mechanical engineering other topics May 12th, 2018 - For shafts 10 to 22mm diameter the keyway key depth tolerance is 0 1mm and it is 0 2mm for shafts 22 to. 3. download Table Of Tolerances From Here. 1/16" 3/32". Tolerance Rating. Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble parts. 010/-/000 for all standard keyways. Hub keyseat has been sometimes referred to. The second is a P9 tolerance. General dimaensional tolerance of cut width Unit:mm Table 2. Metric keyway tolerances conform to ANSI/AGMA 9112 Normal keyway width tolerance. Top. Parallel keysKeyway shaft roymech tolerance Shaft standard key sizes rectangular gates keys diameters most non std readily availableParallel metric keys and keyway dimensions. The slot is defined as a keyway or a. Hardware ANSI Menu. 7500 3. 432 / . Statistical Tolerance. 1 8 3 +0. Chart shown later in this document gives the number of threads/inch based upon threads series and nominal diameter. 500. 25 - M 1. 10. 80. Recommendations for key size, length and keyway depth as a function of shaft diameter are provided in ASME Standards B17. 414 Maximum 2. Key & Keyway Dimensions - Millimeters. 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. Our keyway broach tools are made from 17-4 Stainless and heat treated to 44Rc which avoids the brittleness of 60’s Rc and the flex potential of 20’s Rc. 10. Select between millimeters and inches the unit of measure the results will be displayed. Keyway Width "D" Nominal. 628 2. Their extra depth in shaft reduces the overturning tendency in its keyway. 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. 375 / . Surface Roughness Conversion Chart Tables- Engineers Edge. look. Also see Table of Shaft Tolerances per. 30. 250 +0. Add to Cart. Customer Service. Engineers Black Book - Hot Sheet E25. The shaft keyway and hub keyway dimensions according to ISO 6887 - taper keys with gib head - are equal to those in ISO 6886 used for cutting tools, material stock, gages, etc. 3 S2 6. BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements. Metric Key Keyway Dimensions Per ISO/R773 - Js9 Width Tolerance. 8 6 6 23 30 8 3. Another name for a Keyway is a Keyseat, since the Key is seated in the Keyseat. ex: H11. 4 18 11 66 75 20 4. The bushing system described in this standard is limited to systems having the following characteristics:. 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. Metric External Table Chart Thread Designations Sizes M 1. TOLERANCES ISO. 002 -0. Keyway metricStandard and metric keyway broaches Keyway chart pdfKeyway metric dimensions key iso tolerance js9 width r773 engineering depth hub t2 per mechanical height text radius nominal mill. Undersized. 1 +0. This catalog covers the features, benefits, dimensions, selection, and installation of various jaw type couplings, including the industry-standard L type. The letter is the tolerance deviation, the number the tolerance grade. 1250 0. With tight tolerances and top-quality materials, our keys and cores set the standard for security and functionality. 1. 1 Although US Digital push on hubs are not manufactured to these same bore tolerances they are designed to fit on customer shafts following the g6 shaft tolerance listed. Keyway Slot Tolerances. 3. 1 Standard. H7/h6. Web Price. 1265 0. A 2D (line) requirement. What We Do. pdf. 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/p7These pockets in shafts are directly cut by using woodruff keyway cutters. 90. DIN 6887. w / 3 = d / 6 where. British Standard :BS 46 Part 1 : 1958 Keys and keyways and taper pins. The following Engineering calculator will show the plus and minus tolerance for the specific ISO 286 hole tolerance data. The premise is; if you surrender 10% of the total product tolerance to the gages, you will pass 90% of your product tolerance 100% of the time, if the Go fits and the No-Go does not. 90 3. clearance. In order to avoid stress concentration, leave radii on the keyway corners. The table, to the best of our knowledge, complies with:. AGMA ASA Keyway and Bore Design Data ASA Keyway and Bores Design Data including dimension; Woodruff Keys ANSI B17. 1-1943 Standard. 1 9. 000 on the keyway) at the max key and min keyway you have a problem and the components are not going to fit and that is why his proposing 0. Metric Keyway Tolerance Chart. As in the example above, this requires looking at part alignment and specifying tolerances referencing fit and function. 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. 0005-. Depending on the slot width tolerance, the following fit or seating results in combination with the parallel key: Tolerance b Hub keyway b Shaft keyway for tight fit P9 P9Type L-Jaw Coupling Rating Chart; Type L-Jaw Cross Reference Chart; Displays. The chart (Figure 3-1) below shows a comparison of the droplet sizes of various types of metalworking fluids. Standard Metric Keys & Keyways for Metric Bores with One Key • Couplings All Types (Page 1 of 2) Metric Key & Keyway Dimensions Per ISO/R773 – Js9 Width Tolerance Key & Keyway Dimensions – Millimeters Falk Coupling Hub Keyway Dimensions – Inches Shaft Diameter “D” Key Size Nominal Keyway Width Hub “W” Keyway Depth Hub “T2. Use them for permanent or high-torque applications, or to replace a key in a worn keyway. 2768 General tolerances 2768–1 Part 1: Tolerances for linear and angular dimensions without individual tolerance indications 2768–2 Part 2: Geometrical tolerances for features without individual tolerance indications 6410 Technical drawings — Conventional representation of threaded partsused for cutting tools, material stock, gages, etc. Key (engineering) In mechanical engineering, a key is a machine element used to connect a rotating machine element to a shaft. 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. To help, we’ve put together the following keyway cheat sheet for. center of the keyway. If held to these tolerances, cutting tools, material stock, and gages are generally available throughout the world. 000 Over 1" +0. Standards such as BS 46, ANSI B17. Many keyways are milled directly into a shaft or broached into the. Keys and keyways secure the hub and shaft to prevent relative movement between a power transmitting shaft and an attached component. 350 Maximum 2. Referencing Figure 1, the keyway dimension is W x T1. Max. Frequently Used Fits. Key Size. Generally, there are two classes of stock available for sunk keys, mainly parallel keys. 3/8 . For Hub Keyway Height. However. 2-1967. ex: H11. 180. Don’t forget that the world-famous All Torque Transmissions keyway chart is available on our website. 0015 inches to get a clearance fit. RoyMech Resources Keyways Woodruff Metric key and Keyway Dimensions These Pages include various standards. Tolerances are used to control the amount of variation inherent in all manufactured parts. 025 = 39. Posted on February 1, 2023 in Industry Formulas. Note: 2. Description. Durometer 80D. MIKI PULLEY Coupling Standard Hole Drilling Standards. Detailed width tolerance information is best drawn from the manufacturer. A position tolerance is the total permissible variation in the location of a feature about its exact true position. 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 0. keyways available upon request. (Dimensions comply with DIN 6885/1) † Requires use of chamfered keys. 7500 3. The ANSI B4. 02 0. Rockwell B85. General Tolerances (Excerpt from JIS B 0405 1991/JIS B 0419 1991）. 001 56 = 0. Keys and keyways. Blog GD&T Quiz Print Reading Quiz Guide to Team GD&T Training Orthographic Projection Chart Drill Tap Chart ASME Y14. Key. The schematic representation of the fit is also drawn by tolerance calculator. 062 0. 3 Coupling Interchange Chart STANDARD COUPLING NOMENCLATURE A complete standard coupling unit consists of: • Two hubs • One insert • One cover QF25 SPHUB X 1 3/8 UWhen selecting a keyway tolerance, there are two common selec-tions in the metric system. 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 on24mm Bore, 8mm Keyway Width x 3. Woodruff eliminates the milling around the shaft shoulder where concentricity and stress concentration can be affected. 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 60ISO 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. Iso Tolerance Chart Screw Thread Basics RoyMech. Moorland Rd. [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. 2388 State Route 726 Eaton, Ohio 45320 (937) 456-2232 Fax (937) 456-2282 webmaster@kramerusa. Surface Finish — Sides and bottom of keyways shall not exceed 250 micro inches. 252, the bonus tolerance is 0. b-2 stock qd bushings martin mounting procedure – qd bushings important – be sure tapered cone surfaces of qd bushing and inside of sheave or sprocket hub are dry and free of all foreign substances such as paint, grease, or dirt . W = d/4[clarification needed] H = 2d/3[clarification needed] where. 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. The second is a P9 tolerance. Hub "W" Over. 3) Keyway fillet radius to be specified by customer. Get a quote +61 7 3271 5424. 2 metric standards . dimensions. 006" # Tolerance each on T1 and T2 (16"-20") is-. Each tolerance has a maximum and minimum. The bottom circular portion is placed in the shaft by. This is an undersized clearance. Standard size classification. 375 / . Bore Size Chart. Cut keys to custom lengths. ISO/R 773:1969. The standard tolerance for the shaft of grade 7 (IT7)= 16 i= 16 × 0. 4 31. 2 once at the end of the h tolerance chart keyways js9 and p9 simcut ba keyway broaching insert js9 tolerance from 44 72 ex vat simcut bf keyway broaching insert c11 tolerance from 26 24 ex vatCommittee on Specifications and Tolerances of the 89th Conference Craig VanBuren, MI Jack Kane, MT Clark Cooney, OR Michael Sikula, NY Carol Fulmer, SC Ted Kingsbury, Canada, Technical Advisor Juana Williams and Richard Suiter, NIST, Technical Advisors Past Chairmen of the Committee Conference Chairman Conference Chairman 8-11 L. Check Details. 2 Woodruff Key Size Table Chart ANSI B17. CLEARANCE FIT HUBS — Clean all parts using a non-flammable solvent. Taper keys with or without gib head and their corresponding keyways. 0015 0. Positional tolerances is used to locate features of size from datum planes such as a hole or keyway and used to locate features coaxial to a datum axis. 93. Keyway Bore (inches) Reference Height (d) 1. ISO/TC 14. Table aii-12. INTRODUCTION — The general practice in industry is to supply coupling hubs without fillet radii in the keyway corners to permit the use of standard commercial keys instead of keys with chamfered. 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. However, determining the final limits can be time-consuming and involve navigating complex charts. 424 Minimum 2. The very simplest method of initially selecting of involute spline based on a shaft dia is to arrive at an initial Pitch circle dia (D) and a module (m). For all bore and shaft sizes not listed below use same tolerances and fits as next larger size. 5-6H/6g. 1 Class 2 standards for dimensions and tolerances. Find the depths to cut in keyway and keyseat. When selecting a keyway tolerance, there are two common selec-tions in the metric system. AA dimensions shown in chart are Baldor typical values meeting or exceeding NEMA. Question: Metric Key Keyway Dimensions Per ISO/R773. One of the following methods should be used to specify keyways: Metric: WxH Key W x T2 Keyway British: WxH12 Key W x H Keyway ISO Standard-mm Imperial -Inches * Groove dimensions for woodruff keys DIN 6888 in accordance with DIN 6885 Sheet 1 (with back clearance) BS 4235 Pt. Bores with closer tolerances will be supplied at a slight increase in price . +35 0. It is a precise language that allows for consistent interpretation of a drawing. 001) of an inch. 032 * 0. 002" / - 0. pdf New year, new designs tips. The 10% Rule is intended to assist in the selection of the tolerance for Go & No-Go gages. The standard tolerance for the hole of grade 8 (IT8)= 25 i= 25 × 0. 3/32" 1/8" 3/16" 1/4" 5/16" 3/8" 1/2" For Shaft Keyway Height. 000. If held to these tolerances, cutting tools, material stock, and gages are generally available throughout the world. Shaft with Two Keyways Torque Applied Deformation and Stress Equations and Calculator. This is an undersized clearance. We additionally allow variant types and in addition. The position of keyways should be specified within inner dimension (L-F-S) of a retaining ring. 093 / . ISO Bore Tolerance Chart For bore tolerance system, Nominal sizes from 1 - 160mm DIN 7160 (8. 1. 5. DIN-Keys & Keyways to ISO Diameter d in accordance to DIN 6885/1 in accordance to DIN 6885/3 above to Width b 1) Depth h Shaft Keyway Depth t₁ Hub Keyway Depth d = t₂ Width b 2) Depth h Shaft Keyway Depth t₁ Hub Keyway Depth d = t₂ mm mm mm mm mm mm mm. Get a quote +61 7 3271 5424. i always thought internal keyway should be within . 8 7. 5000 2. 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 . The key length should be less than about 1. For a key to function, there must be a keyway on the shaft and a keyseat on the rotating machine element. 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. 3- Special case for M6 from 250mm to 315mm tolerance. This is an undersized clearance. H8/f7. Standard Keyways and Setscrews Diameter of Shaft Keyway Width × Depth Setscrew Diameter of Shaft Keyway Width × Depth. Select the Machine. When used correctly, it can help reduce scrap, rework, and delays in production. 1 - 1972 # Tolerance each on T1 and T2 (1" -14. Select the Woodruff Cutter from the tool menu (Note: Keyseat cutters are referred to as Woodruff cutters for feeds and speeds): 4. 80. 1 Square Keyway Tolerances. 0035) / 2. ANSI Standard Woodruff Key Size Table Chart ANSI B17. 010 Height (d) (t) - DIM Keyway Width (w) AGMA 9002-A86 Inch Bore and ANSI B17. Straight-sided splines for cylindrical shafts with internal centering — Dimensions, tolerances and verification. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque. A small tolerance key and keyway helps to reduce stress concentration and increase safety. 1 Nm. 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. Created Date:tolerances, poor installation practices, thermal growth or shrinkage, foundation movement, and/or component wear. 3. Square Keyway Tolerances Page 1 of 4. 5~ X. KA F m D b A KB B L KC C 2-C0. 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. Hole and Shaft Tolerances range from greater than 0 to 500 mm. W is the key width. the exact application. A tolerance given that defines how far from a perfect line a feature can be. H is the key height. H8/f7. Once the key is inserted into the keyway, it is not going to move. Unsubscribe. This page explains the advantages and disadvantages of using these instruments. To create a keyed joint, a key is used that fits between slots manufactured into the two parts being joined. KeyWay. Minimum keyseat width is that figure permitting the largest shaft. 3) Keyway fillet radius to be specified by customer. Dimensions in millimetres. Identifies two or more separate features that should be treated as one such as two planes separated by a keyway. Rectangular sunk key. As with all functions of the Machinist's Calculator, linear values can be. 332 Maximum 3. PREFERRED 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. This is an utterly easy means to specifically get guide by on-line. 002″ The MMC is 0. Mm Shaft Diameter Groove dimensions for woodruff keys DIN 6888. Gates Belts, Hoses, and Applications: Standard & Non-Standard Shaft Key. The method comprises the steps that (1) the height H of a central line of the shaft part is measured, (2) the height h of the central line of a measurement block is. 000 / +0. ISO 286The parallel tolerance is tighter than symmetry. Metric Key & Keyway Dimensions Per. , New Berlin, WI 53151-7953 USA Telephone: 262-796-4060 August 2003 Fax: 262-796-4064 e-mail: [email protected]: 0. Keyway sizing chartMetric keyway tolerance chart Shaft standard key sizes table non bushing bore keys qd shallow range gates includes specific each alsoWoodruff keys ansi keyway nominal fasteners. Oversized keys create a tight fit. 250 for key but 0. Hole dimensional tolerances for regularly used ˜tting Units: µ m Standard dimension More than Not more than － － － － － － － － － － － － － － － ± 31 ± 26. Key Depth Tolerance is +. Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble. 125 32 7,4 125 125 125. Machines + Processes. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. Standard. 8mm 1. . For interference fit with setscrew over keyway, see Table 2. No external keyStandard Keyway Dimensions Shaft Diameter Set Screw Width Depth Up through 7/16" 8-32 3/32 3/64. Standard External Metric Thread and Fastener Sizes M 0. Rockwell B82. You could not by yourself going with books store or library or borrowing from your contacts to way in them. 535. 000 / +0. 2-1967 (R1998) - Engineers Edge. SLIDING FIT: Not intended to run freely, but to move and turn and locate accurately. Interference Fit Bore Tol. 6 - M 18. Sprocket - Keyway Tolerances. Standard Bore and Keyway Tolerances Inch and mm. Keyway designation Key bow Chain hole Key cuts Keyway milling Serialization code Key blade Key stop tip Series keymark. Keyway chart sizing key shaft engineeringShaft diameter solid keyway uniform shown re text below factor gears safety transcribed show Metric key keyway shaft standard keyways falk keys bores resources. Also known as half moon keys. WooHoo! You subscribed successfully. 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. 0005" tolerance and a not parallel to bore tolerance which creates a feeling of tighter fit. The ANSI B4. Recommended ANSI Standard Keys and Keyseats Design per. FREE RUNNING: Good for large temperature variations, high running speeds. 53 2. Choose from our selection of rectangle keys, including over 950 products in a wide range of styles and sizes. The number of teeth = D/m and as an whole number of teeth is required a value of D = 48mm is. Comments are off. ANSI Woodruff Keys. Bonus Tolerance Example: Let’s look at a bore of 1/4″ +/- 0. Insert Arrangements Shell Size Designator Insert Arrangement. A key is a machine element used to connect a rotating machine element to a shaft. E-157 Sprocket Tooth Dimensions Sprocket Tooth Dimensions THR t1 t2 t4 M3 Single Hot Rolled Steel PlateKEYSHAFT Keyed Shaft, Diameter 3/4 in, Keyway 3/16 in x 3/32 in. 1. 180. The lower Limit for the shaft = Upper limit for the shaft – Tolerance For shaft. This website uses cookies to ensure you get the best experience on our website. 3 6. Unless otherwise specified, the shaft keyway is assumed to be standard. The dimensional charts below relate to metric rectangular keyways and metric rectangular keys, imperial rectangular keyways and imperial rectangular keys and imperial square keyways and imperial square keys. . ISO/TC 14. 1 0. H7/h6. - Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. 625 / . H9/e9. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. Durometer 85D. P-1686-TBW 12/19. We stock pre keyed shafting in many diameters, including metric diameters, with standard keyways. Referencing Figure 1, the keyway dimension is W x T 1. This key stock is undersized, so keys will fit slightly more loosely than standard keys and are best for inconsistent keyways. As noted above, when selecting a keyway tolerance, there are two common selections in the metric system. 3 16 10 59 65 18 4. Parallel Metric Keys and Keyway Dimensions - Roy Mech. Standard Metric Keys & Keyways for Metric Bores with One Key • Couplings All Types (Page 1 of 2) Metric Key & Keyway Dimensions Per ISO/R773 – Js9 Width Tolerance Key & Keyway Dimensions – Millimeters Falk Coupling Hub Keyway Dimensions – Inches Shaft Diameter “D” Key Size Nominal Keyway Width Hub “W”. 095 . The class fit is specified by tolerance grade (numeral) and by tolerance position (letter). ) It establishes symbols, rules, definitions, requirements, defaults, and recommended practices for stating and interpreting GD&T and related requirements for use on engineering drawings, models defined in digital data. 000/+. Bore Tolerances Keyway & Setscrew Sizes. ISO/TC 14. Also see Table of Hole Tolerances per. 477 Maximum 2. 0. Non standard bores and over the keyways. Minimum Hardness. But also, there are lots of kinds of other applications. The advantage of the Js9 tolerance is that the key can be inserted and the gear manipulated without much difficulty. 4235 : PART 1 : 1972Keyway Cutter Hole Keyway Dimensional Data for MIlling Centers and Arbors - ANSI/ASME B94. 5 H11/g8” to specify tolerances. 000 with a keyway of 1 . It is not economical to “over-tolerance” a feature that does not require it. 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. 8 4 4 13 17 5 2. dIt is used in non-mating assemblies like bearing bushes fitted into the bearing housing, key fitted into the keyway, etc. Shallow keyway depths must exceed 2/3 of the full keyway depth of the square keys shown above. Example 2. The semi-circular recess or pocket is known as the woodruff keyway. However, this key is easy to remove and difficult to install. The upper surface must be located within two parallel planes at a tolerance value of 0. B +0. +40 0. b x h width x thck. clearance fit bores with set screws. 3.