installation tool part no. 118" White St-10 24"X48"Dimensions in: inches - millimeters Inch table. In stock and ready to ship. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. The Woodruff Key numbers indicate normal key dimensions. A tolerance is described using a letter followed by a number. Unless otherwise specified, the shaft keyway is assumed to be standard. 000 / +0. 2 m. 3125 0. Keyway Bore Diameter Size Bore Reference -0. Most likely you have knowledge that, people have see numerous time for their favorite books later this Keyway Js9 Tolerance Chart Pdf, but endKeyway Dimensions: Melting Points: Metric Tap Chart: O-Ring Sizes: Pipe Threads: Screw Extractors: Sheet Metal Gauges & Weights: Socket Head Cap Screws:. Metric. 5" (63. Width b: Depth : Radius R: Nom: Tolerance Class: Shaft t 1: Metric Keyway Calculator. Max. 2520 1. Keyway Dimensions: Melting Points: Metric Tap Chart: O-Ring Sizes: Pipe Threads: Screw Extractors: Sheet Metal Gauges & Weights: Socket Head Cap Screws: Taper Calculations:. The KenCut KS design offers a true 90° wall straightness due to tapered peripheral edges - creating a defined. Lock nuts requiring a keyway (metric) Product table: Lock nuts requiring a keyway (inch) Product table: MB(L) lock washers; Product table: W inch lock washers;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. For example, Gear drives, Pulleys or Sprockets are connected securely using keys to the power transmitting shaft. Keyway broaches, keyseating broaches, keyway broach shims, and keyway broach bushings are used to machine keyways, splines, and other irregular shapes into a hole in metalworking tasks. Keyway depth and fillet radius per BS 4235. These weld-on hubs are drilled, tapped, and taper-bored to make any sprocket, pulley, or gear compatible with our Taper-Lock Bushings. Metric Keyway Calculator. General overview (all dimensions are millimeters) The basic size of the feature or fit is the dimension the tolerances will be applied to: The zero line in the calculator. These metric 316 stainless steel set screws have excellent chemical resistance and can be used in saltwater environments. 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. 3 8 7 31 38 10 3. width x. Also known as step-cone pulleys, these have multiple groove sizes so you can quickly change rotation speed. Metric key keyway dimensions per iso/r773. 4. 4235: Part 1:1972 and conform to I. 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 Nominal key size b × h Applied shaft diameter d Key size Keyway size; b h c or r Standard size of b1 and b2 b1Tolerance （h9） b2 tolerance （E9） r1 and r2 t1 t2; Standard size Tolerance（h8） Standard size Tolerance(h10) Standard size Tolerance Standard size Tolerance; 4×4: 10 or more and 13 or below: 4: 0 -0. Use our Metric Keyway Calculator or Imperial Keyway Calculator to work out the stresses in parallel key and keyway. . BALDOR ELECTRIC COMPANY P. Box 12086 Omaha, NE 68112-2086 Rectangular keys. B6 FOOT WALL MOUNT WITH FEET ON LEFT HAND SIDE WHEN VIEWED FROM DRIVE END. For technical drawings and 3-D models, click on a part number. The Keyway dimensions are also different from the English system. Thin parallel keys and their corresponding keyways (Dimensions in millimetres) Thin taper keys with or without gib head and their corresponding keyways (Dimensions in millimetres) Straight cylindrical involute splines — Metric. Keyway Width. 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. See dimensions W and h in Figure 1. Standard External Metric. In stock and ready to ship. DIN Standard. Connect two shafts to transfer rotary motion from one to the other. 3125 0. Keyway Dimensions. Min. Locate keyways per Figure 6 and Table 8. 763: 1/4: 6. There are standard. Keyway Depth. C, Cotter Pin Hole has centerline. Keyway Width; 3/16 " 1/4 " 5/16 " 3/8 " RoHS (Restriction of Hazardous Substances). 00 thread tap drill size class 6h min. 0005-. 1890 0. When selecting the set screw size, you should select a size where the indentation on the end of the screw is apparent on the cylindrical surface of the shaft. DIN 94 / ISO 1234. 1875 0. Flange Data. Dimensions standard keyseat keyway shaft shafts diameter nominal. S. Measurement System. . 2515 0. 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. Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets. 8 0. b x h 1 x D. Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. Metric Keyway Calculator Key dimensions: Parallel keys are most commonly used. Filters Suggested Categories . At the. ANSI/AGMA 9112-B15 describes sizes and tolerances for straight and tapered bores and associated keys and keyways, as furnished in metric flexible couplings. Metric keyways are dimensioned by width and depth as measured from the. Made from aluminum, bronze, cast iron, steel, manganese steel, stainless steel, AVC, Delrin®, and nylon. Metric Rectangular B. The following standard containprovisions which, through reference in this text, constitute provisions of sTelephone: 262-796-4060 Fax: 262-796-4064 Supersedes 07-2006. keyways & keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys Key Dimensions Standard keylengths (mm). The dimensions and tolerances of interference fit keys shall be given in Table 10 and Table 11. 4 and round result to two decimal places. 350 Maximum 2. 18-8 stainless steel key stock offers a balance of strength and corrosion resistance. Key Size. 375 0. 100 , Find Complete Details about Hss Inch Keyway Broach Tool Set With Bushing And Shim Model No. 465Eagle Tool Metric Keyway Chart. Use our Metric Keyway Calculator or Imperial Keyway Calculator to work out the stresses in parallel key and keyway. Keyseat. Choose from our selection of keyway cutters, including keyseat end mills, keyway broaches, and more. 40 mm Horizontal Shaft Arrangements Vertical Shaft Arrangements B3 FOOT MOUNTED. Steel key stock is an economical choice with good strength. Locating Hole Coordinates for Equally Spaced Holes Standard T-Slots V-Belts Cross Section Dimensions. Width. 414 Maximum 2. 8mm 4mm 4mm 13mm 17mm 5mm 2. 350 Maximum 2. The keyway dimensions are also different from the English system. 60 4. 00 #46. Regions using "inch" units work with NEMA standards (see page NEMA Frame Size). 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. Lockwashers engage a keyway in a shaft or adapter sleeve slot, then locks the accompanying locknut in position by bending one of the washer tabs into the nut’s outside diameter slots. Welcome Location Transmission Bushes Pulleys Belts Vector Belts Roller Chain & Sprockets. Metric keyways are dimensioned by width and depth as measured from the radius of the shaft to the center of the keyway. Usual IEC sizes. Mill Thickness. 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. Machining of square shafts with rounded ends (with or without keyways) Other machining available upon request per prints provided (drill, tap, threading) For Keyway MM Dimensions – see the table at. keyways available upon request. T-L HUBS PAGE PT6-12. Keyway Width. a keyway and a keyseat, which is a slot and pocket in which the key fits. Table 1 Inch size bore diameters . Sintered Steel Full No * Key Key. 0635 0. The size must be entered as a metric millimeter value and be between 0mm and 500mm. Many keyways are milled directly into a shaft or broached into the. 3. 000 for all standard keyways BORE, KEYWAY & SET SCREW INFORMATION MECHANICAL P. O. 2 Normative references . Engineered products . Motor Mass Torque Equation and Calculator. 0232 71 . 5555 S. Figure 2 Keyway Sizes. Lock nuts requiring a keyway . 14 mm. Pulleys Size Chart - Pulleys Size Chart Show results for Filters. All sizes are in inch units. Inch and Metric sizes available Key Stock Assortments. * Imperial keyway sizes on round bores conform to ANSI standard B17. 3D Printing & CAD. 00 mm: Set Screw Size N/A No Setscrew : Keyway Size (W x D) N/A 6 x 2. Bore (F8). 0Dimensions shown are in Inches or mm, if you wish to convert them, please use our universal converter. 5000 2. Metric Standard Parallel Keyway and Key Sizes. The key length should be less than about 1. - Series EL couplings supplied with American Metric ® Corporation Ametric ® 673 GROUP: 050 - 064 Metric Key And Key Stock Assortment Kits KEY STOCK IN STEEL CASE DIN 6880, ACCURACY h9 IN 250mm LENGTHS 20 KIT PIECES 2 2 2 1 SIZE 7 x 7 8 x 8 10 x 10 12 x 12 PIECES 1 1 1 1 SIZE 14 x 14 16 x 16 18 x 18 20 x 20 PIECES 4 3 2 2 SIZE 3 x 3 4 x 4 5 x 5 6 x 6 30 KIT PIECES 2 2 2 2 SIZE 6. BS 46 Part 1 : 1958 Square Keys and keyway Dimensions. DIA. Interference Fit Bore Tol. 4 mm. 455 Maximum 1. --keyway dimensions Keyway sizing chartDimensions standard keyseat keyway shaft shafts diameter nominal. BOX 2400 FORT SMITH, ARKANSAS 72902-2400 U. Window Balancers. Round with Keyways. Keyway Size (in) Part Number Description Bore Size Coupling Size Hub Style Keyway Size (W x D) Length thru Bore CAD; 68514449706: Description N/A AL050 HUB 1/2 1/8X1/16 KW : Bore Size N/A 1/2 in: Coupling Size N/A AL050 : Hub Style N/A 1 : Keyway Size (W x D) N/A 1/8 x 1/16 in: Length. Flat — The tip makes good contact on flat surfaces. ANSI Key No. Metric setscrews are also available. Choose from our selection of metric shafts, including over 5,200 products in a wide range of styles and sizes. web metric key keyway dimensions per iso r773 js9 width tolerance keyways will be furnished per iso r773 and js9. Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or. Undersized metric keys meet DIN 6885 dimensional standards. 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. Bore (F8) b h inch inch inch 1008 1108 1210 1215 1310 1610 1615 2012 2017 2517 2525 3020 3030 3525 3535 4030 4040 4535 4545 5040 5050 3/8 1/8 1/16 7/16 1/8 1/16 1. Gear Knowledge Menu The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94. Slightly larger than the size listed, these. All dimensions in mm. 542. Choose from our selection of taper-lock bushings, including over 175 products in a wide range of styles. 1 - 1967 (R1989); metric keyway sizes conform to BS 4235: Part 1: 1972 (1986) SPECIFICATION WITH BORDERS STANDARD cm in cm in Widths Available 35 to 45 & 81 to 91 14” to 18” & 32” to 36” 1,25 to 91 5” to 36” SPECIFICATIONS BELT TYPE PC20 NO OF TEETH 6 8 10 12 16Points. ANSI B17. 5 mm. bxh Radius r. Standard Metric Keys Keyways for Metric Bores with One Key; Keyway Cutter Hole Keyway Dimensional Data for MIlling Centers and Arbors - ANSI/ASME B94. 5000 2. 3mm 2. The following tables show standard dimensions for keys and their grooves. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. All dimensions are given in inches. B7* Imperial keyway sizes on round bores conform to ANSI standard B17. Keyway parallel keyways metric t2 wxh boresKeyway key rectangular sizes shaft hub keyways specifying studylib Keyway tolerances boreParallel metric keys and keyway dimensions. 1-1943 Standard. all dimensions in inches. 8mm 2. 3 mm. Keystock is available in both inch and metric sizes. ANSI Woodruff Keys. Width. Max. 2 The standard does not deal with misalignment or offset. O. 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. All setscrews are placed directly over the keyway. . Keys and keyways. At the. 5 x 15. Key KeyWay. Keyway Dimensions. Get In Touch. 85" 2. Key dimensions: Parallel keys are most commonly used. NSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. Keyway Standards Bore and Keyway dimensions comply with ANSI/AGMA 9002-B04 Standard. It also determined the range or size of. 95" 3" 3. Inch keys conform to ANSI B17. (Dimensions comply with DIN 6885/1) † Requires use of chamfered keys. 00 $ 486 . Coping with foreign bore and keyway standards | Machine Design. This catalog covers the features, benefits, dimensions, selection, and installation of various jaw type couplings, including the industry-standard L type. O. 000 +0. 90. ANSI B17. You can also drop us a message at info@PEERchain. It is also possible to become a BSI member and obtain copies ofthe Standards at much reduced prices. The tolerance zone for shaft keyway width b with normal fit is ISO N9 and with close fit ISO P9. 377 Minimum 1. *Other keyways are available upon request. 1. Use individual keyway broaches in a variety of arbor hole sizes. The key length should be less than about 1. Height. RBL Precision Ansi Roller. Metric Standard Parallel Keyway and Key Sizes. Groove dimensions keys DIN 6E-ga Shut 1 (With • 1972. In splined-hub sizes. I. 175: 3/16: 4. See dimensions W and h in Figure 1. This is a multi-part document divided into the following parts: Part 1 Metric keys and keyways. Metric keyways are dimensioned by width and depth as measured from the radius of the shaft to the center of the keyway. Interference Fit Bore Tol. The keys and keyways followed the recommendations of ISO R773:1969 and shaft tolerances followed ISO R775:1969. Cylindrical and 1/10 conical shaft ends — Addendum 1: Checking of the depth of keyways in conical shaft ends. Non standard bores and over the keyways. 90 Metric Set EDP No. , New Berlin, WI 53151-7953 March 2015 (PDF revision) Telephone: 262-796-4060 Fax: 262-796-4064 Supersedes 07-2006. metric keyways, metric bores with inch keyways, metric bores with metric keyways, or shaft keyseat tolerances. 2 keyway js9 tolerance chart orientation sutd edu web shaft metric keyway dimensions per iso r773 p9 width tolerance h and metric key amp keywayThe DA17 sets cover the keyway size range from 1/16″ to 3/4″, and the DA-18 sets cover the range from 7/8″to 1-1/2″. b x h 1 x D. SAE Standard. 1 The dimensions and tolerances of metric keys and keyways shall be as given in Table 1 to Table 8. A rounded bottom allows these keys to rock in their seat to relieve stress on the shaft caused by vibration or misalignment. T Metric trapezoidal thread, 7H: ISO 2903 Axial run-out locating face/thread: 0,06 to 0,16 mm max. 2-1967. Steering encoder units . Shaft with Two Keyways Torque Applied Deformation and Stress Equations and Calculator. 442 to 37. INSOCOAT bearings . £ 399 99. com, and we'll work with you to ensure that we provide you with the exact roller chain sprockets or conveyor chain sprockets that you need. KenCut™ KS keyway milling cutters are the ideal solution to machine key slots for a shaft-to-hub connection. Note: Broaches have a. 3 12 8 45 50 14 3. Available bore size metric square N/A N/A 40 40 40 40 40 40 40 40 metric round 30 30 30 30 30 30 30 30 30 30. To confirm the status of any standard, identify the replacement standard if it is obsolete and/or purchase the standard please use. 5 1. All types of Keyway, Internal hole, and Surface Broaches in both inch and metric sizes are available. 2 The standard does not deal with misalignment or offset. The KenCut KS design offers a true 90° wall straightness due to tapered peripheral edges - creating a defined. 1108 Taper Lock Bushing X 1-1/8" Bore. All dimensions are given in inch units. Threads are American National form, Class 3. Unless otherwise specified, the shaft keyway is assumed to be standard. Metric External Table Chart Thread Designations Sizes M 1. - Series EL couplings supplied withRoyMech Resources Keyways Taper Metric Key and Keyway Dimensions These Pages include various standards. 3mm 5mm 5mm 18mm 22mm 6mm 2. In October’s column, I mentioned the typical tolerance for keyways. The inch and metric dimensions here correspond to common values. 3 Coupling Interchange ChartKeys standard metric keyways mechanicalMetric keyway shaft depth reference dimensions diameter iso r773 width Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k keyKeyway metric dimensions keys. Not to long after that, I bought a Dumont inch set. 8mm 6mm 6mm 23mm 30mm Woodruff Keyseats KEY SEAT. Lock nuts requiring a keyway . Also referred to as. All setscrews are knurled cup point. Broaches, bushings, and shims that are used together should have the same style designation (usually indicated by a letter or a letter and a number) to ensure a. Do not chamfer setscrew hole, deburr with a file. 392. 1/16 in; 3/32 in; 1/8 in; 5/32 in; 3/16 in;. 5020. With outside diameters ranging from 2. 0. T Metric trapezoidal thread, 7H: ISO 2903. Download >> Download Bs 4235 part 1 pdf Read Online >> Read Online Bs 4235 part 1 pdf n9 keyway tolerance imperial keyway dimensions 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. 70 Metric Hss Keyway Broach Set, 4 mm, 5 mm, 6 mm and 8 mm Keyway Size, Style B and C, 5100-0070 $486. ANSI B18. Bushings rest inside the arbor hole of your workpiece and act as guides to ensure rigid and accurate keyway cutting. Bushings rest inside the arbor hole of your workpiece and act as guides to ensure rigid and accurate keyway cutting. 53. 4. 500 +0 / -0. Bushings for smaller arbor holes are collared for easier handling. Woodruff Keys are an alternative to Parallel Keys. keyways & keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys 1, the Metric key size is W x T. NSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. 2 tolerance from 26 24 ex vat answer to metric key keyway dimensions per iso r773 js9 width tolerance t2 key amp iso keyway tolerances p9 help environment harvard eduThe metric system does not refer to keyseat or keyway dimensions as does the English system. In addition to the standard numbering system for frames, there are some standardized variations that are denoted by the following suffixes to the NEMA number. 2500 0. Page 1 of 3. 2 standards for dimensions and tolerances. 5020 2. Attach tool holders such as collet chucks and end mill holders to your CNC machine’s spindle. 5020 2. 5: 4 center of the keyway. Keyway (Shaft. , depending on the lock nut size: ANSI/ABMA Std. Page 1 of 3. 1 Cotter Pins Size Chart per ANSI B18. Shaft keyed keyway aluminum diameter grainger length motor shafts close. . Dimensional Charts are for Metric Taper Keyways, Metric Taper Keys, Imperial Taper Keyways and Imperial Taper Keys. 3mm 5mm 5mm 5mm 5mm 6mm 6mm 6mm 8mm 8mm 22mm 24mm 16mm 17mm 19mm 20mm 25mm Keyway Width (w) 10mm 3mm 3mm 1. clearance fit bores with set screws. thinwall — metric insert installation removal carbon part no. Square. Max. 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. Metric (MM) Dimensions in Black Inch Dimensions in Red d = DCMotors 1 mm = . 15" 3 1/4 " 3. Oval — Use in U-shaped and V-shaped grooves and on other sloped or angled surfaces. The IEC 72 defines motor frame size standards for regions that use SI units. 9112--A04, Bores and Keyways for Flexible Couplings (Metric Series). 5mm) wide which is cut on our KEYSEATER. 1 Cone Head Rivet ; Cotter Pin ANSI B18. 2515 0. This key stock is stepped to match repaired keyways in shafts or gears. Allowance must be made for keyway and setscrews . 240 0. l. The correct terminology when ordering metric bored bushings with millimeter key-ways will be either of the following: 1. Over To (Incl. The collar rests on top of the workpiece rather than being supported from below. 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 – D10 Width Tolerance ‡ Key & Keyway Dimensions – Millimeters Coupling Hub Keyway Dimensions – InchesUse individual keyway broaches in a variety of arbor hole sizes. 25. 8. Lock nuts with integral locking . They have a spider-shaped cushion between two hubs to reduce shock and handle minor shaft misalignment. ANSI_B17_1-Keyway_Dimensions. Broaches are for use in hand and hydraulic arbor presses and are great for maintenance and short-run production operations. 02 in h > 9. Step Key Assortments. atomarc Posts: 264 Joined: Sun Oct 04, 2009 12:13 am Location: Eureka, California. 2 continued. Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque. 2 7-1,2 1. 25 - M 1. Address. The key length should be less than about 1. Height. Page 1420 | Modi˜cation standads DIN 6885 Keyway, key details Extract Page 1 heavy type 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 6 2 2 2 7 1 +0,1 4,8 1,2 +0,1 5. 3 Broaches and 12 Bushings = 36 keyway combinations. Part 1, which specifies the dimensions, tolerances, and other parameters for different key sizes. Suspend, lift, or lower objects that move vertically in a track such as windows, doors, and panels. 25 m8-1. 00Available Bore Size imperial square 1. Nominal Shaft Diameter ( A ) Bottom of Keyway to Bottom of Shaft ( B ) Keyway Width ( C ) Reference Depth ( D ) fractional decimal fractional decimal 3/8 0. As noted above, when selecting a keyway tolerance, there are two common selections in the. For example, an ANSI 202 measures 1/16 x 1/4, while ANSI 1012 measures 5/16 x 1 1/2. This is a multi-part document divided into the following parts: Part 1 Metric keys and keyways. 04 in inch mm > 0. 2. 1/2 2-1,2 R Cutter Run-out '3/16 '9/16 1-1116 1-11/16 2-7/16 1/2t03/16Most popular Metric size Square and Hexagon Broaches available from stock. Available in 0. Therefore most motor series are offered with both standard frame sizes. - Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. Home; Metric Keyways Index page; Parallel Keys and keyway Dimensions; Parallel Keys and keyway Dimensions to BS 4235-1:1972 KeyWay & Key Dimensions. 20–21 Special Broaches Special Broaches to almost any specification in Push or Pull-Types. Information used with permission ot Martin 02007 Shatt Keyseats/Hub Keyways Standard Keyseats/Keyways Sra' IoW Square Keyways Metric: WxHKey W x T2 Keyway American Standard — Inches Shan 6. Also calculated are the overall measurements for shaft and bore, as well as the chord height. inch mm; 1/8: 3. Huyett custom manufactures machine keys of these types and others in your choice of size, material, and tolerance. 4mm 3mm 3mm 11mm 12mm 4mm 1. ASTM Standard. metric bores.