standard keyway sizes. 3 16 10. standard keyway sizes

 
3 16 10standard keyway sizes Group dimensions In standard practice, dimensions are grouped on a drawing for uniform appearance

375 0. (Square) Max. PTO drivelines are also offered without the implement end yoke and trunnion. SAE Standard. There are tables for this in "Machinery's Handbook". Please consult factory if interested. Referencing Figure 1, the keyway dimension is W x T 1. 2. They meet DIN 6887, an international standard for machine keys. 000. D. The first is Js9. 237 . Therefore most motor series are offered with both standard frame sizes. 1. 094" 1/8" 3/16" 0. 01, Taper Bores for Flexible Couplings. The maximum bore size is dictated by the requirement that the strength of the hub is to be higher than that of the gear teeth. Get a quote +61 7 3271 5424. 1 Class 1 standards for dimensions and tolerances. 500 - 1. *3/8". Specifying English Keyways In the English system, it is standard practice to dimension keyways. 0 $0. Nominal Dia. 08L Pulleys 10 - 16 teeth min . Min. Woodruff keys work well near shaft shoulders, where a standard open keyway would create too much stress. 005, -. Email. Keys are made of steel. The standard keyway (USA Standard ANSI B17. Bore Size. 000. 8 14 9. Series 500 and 600 Standard Keyway Broach ChartDownload a Printable Keyway Chart. Clean delicate surfaces inside tubes, pipes, and holes. The minimum width is limited to provide. 4 mm. We can also supply specific cut lengths on 2-15/16" keyed shaft. 3. †. Choose from our selection of steel key stock bars in a wide range of styles and sizes. ) Millimeter Bore Inch Bore Bushing Stock Bore Range Maximum Standard Shallow Minimum Keyway Keyway #Important — The metric system does not refer to keyseat or keyway dimensions as does the English. 2 mm, but the shaft had a keyway. Max. 4235 : PART 1 : 1972. 63 . 8 mm. It has a hub attached and the inside diameter is 1 1/8''. 002/-0. Reverse of D Series. Fillet radii comply with AGMA 9002-A86. This part is Powdercoated for long-term rust prevention. Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. Fully-threaded, headless screw with a hex drive at one end and a protruding tip with a flat surface at the opposing end. 3D Printing & CAD. Keys are made of steel. SIZE ATK213P 5/16 x 3/8 ATK214P 1/4 x 7/16 ATK215P 7/16 x 1/2 ATK216P 1/2 x 5/8 ATK217P 5/8 x 3/4. 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. 96 . Where a key is to be used it should be parallel and side fitting with top clearance. English Dimensions: Metric Dimensions: h Keyway: W x T1 Keyway: W x h T1 Key: W x T Key: W x T T H r. 5 mm. 120. British Standard :BS 46 Part 1 : 1958 Keys and keyways and taper pins. Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need. Everest 29 cylinders in S123 keyway with two patented keys are standard for stock. all dimensions in inches. Rectangular or square parallel keys and their corresponding keyways (Dimensions in millimetres) 95. Taper-Lock Bushing Keyseat Dimensions Bushing Bores (in) Keyseat 1008 0. 6 mm (25 Each) Key Size 2 mm × 5 mm (25 Each) Key Size 2. Keyway broach 1/16 to 1-1/2 inch, 2. Over To (Incl. Undersized Machine Key Assortments Since they fit more loosely than standard keys,. Tapered keyways are supplied only when specified. 000 Standard Setscrew Locations If one setscrew is furnished the location. keyways & keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keysSlightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. The commonContact your local Baldor office for “L” Dimensions. Available 5-, 6- and 7-pin. AGMA ASA Keyway and Bore Design Data ASA Keyway and Bores Design Data including dimension; Woodruff Keys ANSI B17. size set screw wrench torque in . Tapered keyways are supplied only when specified. Keys and keyways. In stock and ready to ship. 6 - M 18. BS 4235 Pt. 3) Keyway fillet radius to be specified by customer. 48 products. 200 . Referencing Figure 1, the keyway dimension is W x T 1. The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. 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. Std = Standard keyway for the bore size Ns= Non-standard keyway R=Radius available for this size (Anything marked Std, Ns, or R means we cut them on a regular basis. Nr. Unless otherwise specified, the shaft keyway is assumed to be standard. 002-. This Double Groove Drive Pulley is for use as a general purpose pulley for power transmission such as compressors, industrial fans, lawnmowers, snowblowers and electrical motors. 225/125; Crankshaft Extension (Standard): Keyway Size. Federal Specification. DIN Standard. They may be used with shims if the depth cannot be broached in a single pass. Keyway Depth. Mechanical & Motion Systems. Undersized Machine Key Assortments Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble parts frequently, such as during maintenance or prototyping. Therefore most motor series are offered with both standard frame sizes. In stock and ready to ship. ALL KEYWAYS THROUGH 1/2" ARE NOW PM-M4! Order broaches by numbers found in first column. 303 Stainless Keyed Precision Ground Shafting, is manufactured from Grade 303 stainless steel round that has been turned, ground and polished with a pre-machined full length keyway cut to ANSI standards. A list of standard keyway and corresponding key sizes for English shafts are listed below in Table 1. 10-11-2012, 10:04 AM. Shaft with Two Keyways Torque Applied Deformation and Stress Equations and Calculator. Cutters are available without reinforced back as customs. Full Length Pre-Keyed Shafting. The commonspecification. SAE Standard. 005 x. This V-Groove Drive Pulley is for use as a general purpose pulley for power transmission such as compressors, industrial fans, lawnmowers, snowblowers and electrical motors. Bushings rest inside the arbor hole of your workpiece and act as guides to ensure rigid and accurate keyway cutting. 0938 0 . 5 times the shaft diameter to ensure a good load distribution over the entire key length when the shaft becomes twisted when loaded in torsion. DIN 6885* Keyway, key details Extract Page 2 heavy type for machine tools d b P9 / JS9 Hub keyway. Crankshaft Extension (Standard): Length/Diameter; 165/85. Choose from our selection of 1 3/16" shafts in a wide range of styles and sizes. 500 1. Keys are made of steel. 8mm 2. Solved the shaft shown in the figure below (dimensions in Keyway slot tolerances Agma keyway bores engineers edge asa data fit llc copyright 2000 2021. Bushings rest inside the arbor hole of your workpiece and act as guides to ensure rigid and accurate keyway cutting. Key Type. BS 4235-2:1977, ISO 3912-1977: Specification for metric keys and keyways - Woodruff keys and keyways. Standard Keyway Dimensions A 1 1 . 188" 1/4" 5/16" 0. 5000 2. Stock Pulley nominal width No. Dimensions and tolerances of metric keyways for parallel keys (source:BS 4235-1: 1972)Keyway Standards Bore and Keyway dimensions comply with ANSI/AGMA 9002-B04 Standard. 356 . The USA standard recommends maximum stress concentration factors up to 2. The key length should be less than about 1. Iso Standard R773 iso r773 keyway dimensions calculator metric keyway dimensions standard keyway sizes in mm bs 46 part 3 bs 46 part 1 22 feb 1972 purchase your copy of bs 4235 1 1972 as a pdf download or hard copy directly from the official bsi shop all bsi british standards available online in electronic and print formats table 1, p9 tightAnsi Standard Keyway Sizes Pdf Right here, we have countless books Ansi Standard Keyway Sizes Pdf and collections to check out. Related: Shaft Arbor and Keyseat Dimensional Data American National Standard Keys and Keyways; Standard Metric Keys Keyways for Metric Bores with One Key; Keyway Cutter Hole Keyway Dimensional Data for MIlling Centers and Arbors - ANSI/ASME B94. This cylinder has two 3/32” diameter ball bearings on each side of the keyway. Two PDFs. Most keyways in a shaft are half the height of the key plus . 002 -0. 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 whenStandard 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 DiameterThis shaft is constructed out of cold finished (CF) 1018 steel with a 3/8" key depth, meaning that the standard square keystock size for the shaft is 3/4", which we stock. Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. 3mm 2. 14 mm. Keys and keyways. them is this Ansi Standard Keyway Sizes Pdf that can be your partner. The table, to the best of our knowledge, complies with: DIN6885 Pt. 356 . 125 0. 1 Square Keyway Tolerances 3/8 . The height of inch keys decreases by 1/8" for every 12" of length. 0. Shaft: Key: Keyway: Nominal Diameter d: Section b x h : Width Shaft & Hub b: Depth: Radius r: Shaft t 1: Hub. EN Standard. 63 . Reinforces concrete to reduce the chance it will crack from expansion and contraction. A negative number in this description means this has an integral keyway, so no separate key will be needed to anchor the pulley. title: b-7249. NOMINAL SHAFT DIAMETER. 016 1/64The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. For example, Gear drives, Pulleys or Sprockets are connected securely using keys to the power transmitting shaft. 3mm 3. Standard and/or project Stage TC; ISO 14:1982. ForProduct data for lock nuts requiring a keyway. 003-0. 1875 AGMA 9002-A86 Inch Bore and ANSI B17. The common0. It is, therefore, keyways are required both on the shaft as well as on the hub of the mating element. 3mm 5mm 5mm 5mm 5mm 6mm 6mm 6mm 8mm 8mm 22mm 24mm 16mm 17mm 19mm 20mm 25mm Keyway Width (w) 10mm 3mm 3mm 1. 109 - - 0. Tube Cleaners. Standard woodruff keysWoodruff ansi metric keyway fasteners nominal Key steel pulleys belts metric transmissions. NEMA Flange Bolt Circle (AJ) Mounting Holes (TAP) Register Diameter (AK) Shaft Diameter (U) Shaft Length (V) Keyway width (S) remaining shaft thickness to keyway (R) 8: 0,8:. The Keyway provides a secure clamp and lock, produced at standard keyway sizes to ensure you can easily adapt your kit to work in conjunction with your new tools. 0mm to 26. The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. 120. width x. A rectangular key is generally used for shaft diameter between 1” (25 mm) and 20” (500 mm) Generally, these have a reduced effect on the shaft due to its shallow keyway depth. 6 mm. The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94. - Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. Hand-Driven Hole Punches. 96 . Keyway width is most usually 1/4 of shaft diameter, rounded to the closest stock size. 0000 /-. Nearly every shaft diameter has a corresponding standard keyway width and depth – this calculator helps you find it. *2: Keyway additional modification is only performed on the D 2 side for XHW-AC. Z Class bitting. 8mm 2. 012 in. 99: ISO/TC 14: ISO 3117:1977. All dimensions in mm. While a designer is free to specify any. The following tables show standard dimensions for keys and their grooves. Referencing Figure 1, the. One-pass keyway broaches are used for cutting the full width and depth of the workpiece in smaller run productions. Each letter covers a range of standard keyway sizes. The standard keyway depth in the shaft is 1/2 the keystock size. Table of Contents General Usual IEC sizes Mechanical tolerance. Dimensions in millimetres. Keyway misumiKey and keyway dimensions. Length Size Plain thick,T Jamb thick,W X Diameter Small End B Keyway Width D Ke yway Side Depth a E Thread c F Undercut Dia. Key metric keyway standard keyways falk keys bores resources industrialDimensions standard keyseat keyway shaft shafts diameter nominal Metric key keyway dimensions per iso/r773. 2; Thread Shear Area for External and Internal Formulas and Calculator per. STANDARD SERIES CHAIN *Dimensions are across pins. A standard broached key-Cleveland Steel Tool recommends the use of Keyways and Spots for positive alignment of shaped punches and dies. Hardware ANSI Menu. 237 . thck Nom Free Normal Close/Int - - - -. We carry a wide range of products with keyways, including bushingsand roller. Other inch and metric sizes are readily available. There is no clearance allowed for the. 63 . Technical Information Keysteel & Chalk Catalogue Keyway Standards – IMPERIAL. In the absence of specific details, manufacturing will be based upon DIN 6885 - T1. , depending on the lock nut size: Mating shaft threads (recommendation)and 25mm and Type AFS sizes up to 11/2 inch are in stock. 500 - 1. The common Key size Keyway size; b h c or r Standard size of b1 and b2 Tightening type Normal type r1 and r2 t1 t2; Standard size Tolerance (h9) Standard size Tolerance b1/b2 tolerance(P9) b1 tolerance(N9) b2 tolerance(Js9) Standard size Tolerance Standard size Tolerance; 2×2: 6~8: 2: 0 -0. Internal Gears. With larger screws than those found on standard clamping collars, these provide a. Finished Bore sprockets are machined to ANSI standard tolerances with one keyway aligned to the center of a sprocket tooth and with two set screws. 200 . 015. 50 2100 35-2 3/16 . - Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. 130 . 002 on the key. CLOSE. Tapered keyways are supplied only when specified. The data in the standard considers commercially standard coupling bores and keyways, not special coupling bores and keyways that may require special tolerances. Fully threaded, headless screw with a hexagonal drive at one end and a cup-shaped indentation at the other. Metric module, side fit. 19 Shaft and Arbor Class A and B All dimensions given in inches. 3mm 2. Electric Trading company SERVING THE INDUSTRY SINCE 1903 English Standard Keyway and Key Sizes Shaft Diameter (in) Keyway (in)* Key (in) From 5/16 1/2 5/8. d. *Dimensions are for reference only. 025: h9: 0. 60 4. ) Do not operate sheave with flange projecting beyond the hub end Key "H" projects to provide a grip to removal . Specification. For extremely low output speeds, compound gearmotors are sorted by the. UL Standard. 30 x 15; 30 x 15. Coping with foreign bore and keyway standards | Machine Design. Title: ANSI_B17_1-Keyway_Dimensions. 000 on the width and ends of the keyway, +0. 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-dimensions. 37 . 062 0. To ensure an adequate factor of safety in the design of a shaft with standard keyway (width, one-quarter, and depth, one-eighth of shaft diameter), the former Code for Transmission Shafting tentatively recommended that shafts with keyways be designed on the basis of a solid circular shaft using not more than 75 percent of the working stress. The okay book, fiction, history, novel, scientificYour Price: $38. In Stock. * 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). 094" 1/8" 3/16" 0. PRINT. com, which includes; 1610 Bushing Series,1 in Bore Size,1 in Length Through Bore,2. Special Non-Standard Keyway: Our website list “Industrial Standard” Keyway sizes. If your measuring from the OD of the shaft there is a formula in Machinery Handbook to add that dimension to the half size of the key but don't depend on it for the right depth to cut to. RoHS Compliance. In stock and ready to ship. Keyway is not made for holes of less than 12 mm. 002-. 2515 0. 3. PFEIFER INDUSTRIES, LLC. TruKey® Shafting from Keystone is designed to provide the straightest, most accurate keyed shafting, in the industry. A negative number in this description means this has an integral keyway, so no separate key will be needed to anchor the pulley. - Series EL couplings supplied with Key standard sizes shaft failure theories ppt powerpoint presentation diaMetric woodruff keys are supplied to din 6888 / iso 3912 in c45k key Keyway chartKeys standard metric keyways mechanical. Drawings represent standard TEFC general purpose motors. Metric – Rectangular. Keyway width P9 tight fit (standard design) JS9 or N9 loose fit (standard design) Other tolerances / tolerance ranges must be specified separately and require a written agreement. 255/100; 255/125. 1 Square Keyway Tolerances Minimum 2. 0015" larger than the standard Keyway size. Ansi Standard Keyway Sizes Pdf Thank you very much for reading Ansi Standard Keyway Sizes Pdf. Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to. Key dimensions: Parallel keys are most commonly used. 015-0. 000 1. 500 - 1. A list of standard keyway and corresponding key sizes for English shafts are listed below in Table 1. A. keyway dimension is W x T1. STANDARD KEYWAYS AND SETSCREWS STANDARD BORE TOLERANCES . 5~ x. Where bores do not permit standard depth keyseats, a flat key of the proper dimension is furnished with the bushing. Reinforces concrete to reduce the chance it will crack from expansion and contraction. - Series EL couplings supplied with British ISO Metric Screw Threads Designations. As noted above, when selecting a keyway tolerance, there are two common selections in the metric system. ANSI B17. 3 1. It has a hub attached and the inside diameter is 1''. The commonStandard Keyway Broaches made by us are available in a variety of sizes in HSS M2, M3, M35,M42, ASP 2030, ASP 2052, ASP2062 material. Typing 10. 15 products. Keyway depth is something like 2/3 to 1/1 of width. 26, so the flat diameter is about 3 1/4”. For technical drawings and 3-D models, click on a part number. Keyway Depth (Normally 1/2 of width) Total Height (X) = Depth (Y) = Metric Calculator Bore Size. 8mm 2. 1/8″ B Type HSS Keyway Broach; 3/16″ B Type HSS Keyway Broach; 5/32″ B Type HSS Keyway Broach; 5/8″ B Type Collard Bushing (1) 8mm C-1 Type HSS Keyway Broach; 20mm C Type Collard Bushing; 7mm C Type HSS Keyway Broach; 6mm C-1 Type HSS Keyway Broach (1)Browse Metric Set Screw Couplings w/Keyway MRC4H-Series in the Climax Metal Products Company catalog including Item #,Bore,OD,Length,Screw Size,Keyway Size,Material,Weight,CAD 800. Keyway Width. ISO/TC 14. 1875 inches deep, 0. 1 - 1972. 3/32" 0. 0. Tolerance. 5: 19: 20: 21: 22: 23: 8: 4: 24: 25: 26: 27: 28: 30: 32: 10: 5: 33: 35: 36:. These punches are half the size of standard portable lever-operated punches. U. 4 mm. Standard Keyway & Bushing Sizes With Setscrew Bore Keyway 3/8 1/2 to 9/16 5/8 to 7/8 15/16 to 1-1/4 1-5/16 to 1-3/8 1-7/16 to 1-3/4 1-13/16 to 2-1/4 2-5/16 to 2-3/4 2. ANSI Standard B15 . 0 x 1. The shaft keyway and hub keyway dimensions according to ISO 6887 - taper keys with gib head - are equal to those in ISO 6886Model Sizes Model Sizes Model Sizes Model Sizes Series 52, 54RD & 54RDG 125 AMR / CMR 162-200 AMR / CMR 225-1550 DBZ 163-451 DBZ 50-126 Series 52, 54RD & 54RDG 162-200 Series 52, 54RD & 54RDG 225-1300 Original Thomas design features round profile with evenly-spaced or paired bolt holes . Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. – . 5 2012 10028 248. Keys: according to DIN 6885 (domed type); keyway width to ISO N9 Hollow Shafts Diameter tolerance: Ø → ANSI H7 Ø → ISO H7 measured with plug Ø 0. The key length should be less than about 1. BROWSE CATALOG. Keyway: The hub or bushing keyseat. DIMENSIONS COMMON DIMENSIONS TYPE F & H TYPE B MAX BORE BORE DIA SIZE OD H E F G BUSH SIZE MM INCHES C D J MAX PILOT C D 70. The 22 x 14 suggestion makes a lot of sense, unless prevented by thin-walled hubs and/or shaft size issues. 3mm 2. Below is a reference on shaft diameters and the corresponding keys / keyways according to the prevailing standards. Unless otherwise specified, the shaft keyway is assumed to be standard. These explain the sizes and dimensions required by different keyway families according to different manufacturers, and the charts are used in the making of keyways to ensure correct sizing. This article provides a table below that shows the standard dimensions (sizes) for square and rectangular cross-section sunk keys. The hub keyway is dimensioned by its width and depth on the shaft – keyway sides. --Satyanarayan Gangaram Pitroda Addeddate 2013-09-10 07:34:16Undersized Key Stock Assortments. Keys and Keyways: The Basics In order to lock a hub or bushing and shaft together, and prevent the shaft from rotating in the bore, a key. 2 Keyways - Dimensions for keyways are given in Table 3. Inch keys conform to ANSI B17. Browse Metric Set Screw Couplings w/Keyway MRC-Series in the Climax Metal Products Company catalog including Item #,Bore,OD,Length,Screw Size,Keyway Size,Material,Weight,CAD 800. 002" 0. 5 times the shaft diameter to ensure a good load distribution over the entire key length when the shaft becomes twisted when loaded in torsion. BOTTOM OF SHAFT TO BOTTOM OF KEYWAY. Key and keyway dimensions (control in motion) Keyway shaft coupling hole service couplings modification additional motion control tapered parallel Keyway chart Standard shaft sizes key bushi. 5 149 71 14 115 5 20055 491610 80 15. Undersized Machine Key Assortments Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble parts frequently, such as during maintenance or prototyping. S. ISO/R 774:1969. Keyway metric key iso dimensions standard keyways keys. 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) Metric key keyway dimensions per iso/rtt3 js9 width Metric plated Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k key. American National Standard Bores and Keyways for Flexible Couplings (Inch Series) ANSI/AGMA 9002--B04. EN Standard. Keyway (Hub) Radius r. In Stock. 12 mm. +35 0. 59 1750 25-3 1/8 . The keyway specified dimensions shall be at least 1-1/2 in. Standard Calculator Bore Size. 1. One set screw is located over the key and one is located 90 degrees to the key for locking onto the shaft. 200 . Keyway dimensions and set-screw locations. Gear Products and Suppliers | Gear Knowledge Menu. Keyway Broach 1/16 to 1-1/2 Inch - 2. accompanied by them is this Ansi Standard Keyway Sizes Pdf that can be your partner. ANSI B17. 56 . 2 7-1,2 1. 0125 +. BS 4235 Pt. Description: In alloy steel, we have all standard sizes available in stock, ranging from 3/8 inch to 4 inch O. UL Standard. Metric External Table Chart Thread Designations Sizes M 1. Figure 3: Footing detail showing minimum requirements from ACI 332-14 for lateral connection by keyway. You may order your center cross and end yoke as you require. 477 Maximum 2. The intent of ANSI/AGMA 9002A86 was to offer designers and users standard dimensions and - tolerances for inch bores, keys and keyways for flexible couplings. ISO/R 774:1969. 002-. Congressional Act. 1265 0. Dimensions (mm) Over To (incl. This International Standard specifies the dimensional characteristics of thin parallel keys and of the corresponding keyways in shaft and. d Tolerance Class Shaft t1 Hub t2. Key and keyway dimensions (control in motion) Keyway chart Standard keyway dimensions. xxxx 0. 48 products. Rebar.