keyseat dimensions. Clearly if the peg is 1-inch square and the hole is 4 inches in diameter, then the peg will easily fit in the hole, albeit useless. keyseat dimensions

 
 Clearly if the peg is 1-inch square and the hole is 4 inches in diameter, then the peg will easily fit in the hole, albeit uselesskeyseat dimensions  The lack of a Z or Y suffix indicates that the shaft and mounting hole dimensions are the same for all motors with the same frame size

Finished Bore with Keyway & Set Screws D40BS17H X 1 TSUBAKI Single Strand Sprocket, 40 Chain Size, 3/4 Bore Dia. Bore and Keyway dimensions comply with ANSI/AGMA 9002-B04 Standard. Dec. Min. , 26 # of Teeth 60BS26H X 1 3/8 TRITAN Stock Plain Bore Bore Roller Chain Sprocket, 80 Chain Size, 25 # of Teeth 80A25 X 1 TSUBAKI Sprocket Strd Mult 1In 5. The following sections describe key and keyseat dimensions, keyseat failure, and key failure. Cutting Tools / End Mills / Woodruff Keyseat Cutters Viewing Page 1 of 24 (288 results) Sort By: Best Match. 5 11 15. What was the overall height of the casting before finishing? NOTE: ALL FILLETS R. 248 0. 40 1. 3125 2. The last two digits give the nominal diameter B in. nema keyseat nema keyseat shaft dimensions shaft dimensions (u) (r) (s) (u) (r) (s)Woodruff Keys ANSI B17. *Dimensions are for REFERENCE in Energy EfficientIndustrial Electric Motors and DrivesLeader in Energy EfficientIndustrial Electric Motors and DrivesKey and Keyseat Dimensions Frame D G F. Dimensions should specify only the size of a feature. 00 2. GD Frame. 006" # Tolerance each on T1 and T2 (16"-20") is-. Set Screws . 5 14 9 71 14 11 5 5 200 55 49 16 10 Leader in Energy Efficient 80 19 15. 6-hole drilling (most sizes) makes installation and removal quick and easy. Which scale was used on this part?21. Check Details. 78 Ramazan ÇAKIROĞLU / GU J Sci, Part C, 10(1): 76-84 (2022) Figure 2. 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. J = S - + + C. Woodruff key slot dimensions keys 4 1 key fa r cutter dimensions size chart keys. 1 Size Table Woodruff keyseat cutters — Dimensions 1 Scope This International Standard specifies the dimensions of milling cutters intended for manufacturing woodruff keyseats in accordance with ISO 3912. They mill precise notches in rotary shafts to fit machine keys and can also be used for slot milling. 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 whenKeyseat is a recess in the shaft,. M-42 Cobalt works great in all types of materials and will give much better tool life than M2 or M4 tooling. 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. 093 / . Note 1: Maximum bore with keyseat. — Metric Woodruff Keyseat Cutters — Shank Type. 15 degrees from the vertical. Keyways. directions, limited ingress. 512 4. Use these end mills for general purpose keyseat cutting in a wide range of material, including aluminum, iron, and steel. 350 Maximum 2. 5020 2. 75 7 2 2. The inch and metric dimensions here correspond to common values. * See page 8 for bore tolerances, page 11 for standard keyseat dimensions. a) Dimensions of the workpiece and tool (electrode), b) processing principle and keyseat dimensions 2. Nominal Dia. 375 1. 0. 5 14 9 71 14 11 5 5 200 55 49 16 10 80 19 15. 000. Also the dimensions are unilateral: for the keyseat, the dimension is a minimum; for the keyway, the dimension is a maximum. 19 ; Shaft Arbor Keyway. Smooth-Finish Slitting Saws. ) None; Bushing Required 3020; Width (In. Key. Flats The length of flats should be specified as the overall length of the flat including the radius at the end(s) of the flat. 5000 2. 500 - 0. 03In 80 36, 80BTL36 80BTL36 TSUBAKI Single Strand Sprocket , 60 Chain Size, 1-1/2 Bore Dia. Also known as half moon keys. The height of the keyseat itself is not dimensioned because, once the top of the shaft is cut away, there is no feature left to measure. 000;-. Our exceptional quality and service has allowed KEO to become a world leader in the cutting tool industry. Inspection methods for straight and tapered bores and keyways are included in the annexes. 1 ; Shaft Arbor and Keyseat Dimensional Data ANSI B94. 5 44180 48 42. When this happens, Wood’s furnishes the correct rectangular key to suit at no charge. Key and Keyseat Dimensions FrameD G F GD Frame D G F GD 63 8. E GE F GD GA D GE IEC SHAFT EXTENSION, KEY AND KEYSEAT DIMENSIONS* CONTINUOUS DUTY AC MOTORS *Dimensions in millimeters FRAME D E KEY KEYSEAT 2 POLE GA 4, 6, 8 POLE F GD F GE 56M 9 9 20 3 3 3 1. Without any physical obstructions surrounding the motor, two 324T motors will mount onto the. 5 times the shaft diameter to ensure a good. , 11 # of Teeth 60B11F-1 1/8 TSUBAKI Sprocket Chain Rlr P Sgl 7-7/8In 80 23, 80BTL23 80BTL23 TSUBAKI Single Pitch Roller Chain Sprockets, 16B22 16B22 TSUBAKI Sprocket Chain Rlr P Sgl 5/8In 3. What is the maximum permissible center-to-center distance of the two large holes?22. 000 -0. KC | Milling Tools. WIDTH. Here we can calculate rigid connections, namely the pinned, keyed, splined and flanged ones. ANSI Key No. 1-1943 Standard. 000 2. This standard presents metric dimensions, tolerances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. Read more on how keys and keyways work and what types are available – Keys and Keyways. Shallow Keyseat Dimensions Some large bore Type C flanges are supplied with shallow keyseats. 0 No Keyseat 1 Standard Keyseat X No Keyseat or Standard Keyseat Part Number Examples L095118 L095 x 1-1/8” Hub L07512NK L075 x 1/2” No Keyseat Hub L09515/16 L095 x 15/16” Hub Bore Tolerances Bore Size Tolerance Up to and +. 51966 2256053 18 11 90 20248 7 2506567. The above chart provides typical Baldor•Reliance motor dimensions. 3750 1. 5 6. Key Size Versus Shaft Diameter ANSI B17. per ft. Note: When ordering, add the X-Style Bushing prefix to the indicated part number. See dimensions W and h in Figure 1. Without any physical obstructions surrounding the motor, two 324T motors will mount onto the foundation and couple up the same. 15 degrees from the vertical. 1 Keyway Dimensions - Lowell CorporationAGMA 9002-A86 Inch Bore and ANSI B17. Class 3 is an interference fit: for permanent assemblies. See dimensions W and h in Figure 1. Order Tritan Finished Bore with Keyway & SS Bore Sprocket, 40 Chain Size, 5/8 Bore Dia. Preferred size is 1-1/2 in. Dimensions should be placed in the most descriptive view of the feature being dimensioned. Select the Machine. The keyseat engages with the key on the part to prevent unwanted rotation of the part when it is mounted to the shaft. 005 Min Diameter F. 6-hole drilling (most sizes) makes installation and removal quick and easy. CollegeANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. Woodruff key slot dimensions 9 fasteners keys. 5Ac Motor Frame Size Chart Ac Motor Kit Picture Sumber acmotorkitpicture. 5 20 12 100 28 24 87280 80 71 22 14 112 28 24 87315 85 76 22 14 132 38 33 10 8 355 85 76 22 14 160 37 4 2 8 *Contact your local Baldor office for “L” Dimensions. Forces Exerted on Shafts • Gears, belt sheaves, chain British ISO Metric Screw Threads Designations. Keys and keyways are used to transfer torque from shafts to holes or vise versa. TRITAN Finished Bore with Keyway & SS Bore Sprocket, 60 Chain Size, 1-1/2 Bore Dia. Keyseat cutters down to . Many tools are available with additional coatings. Made of solid carbide, these keyseat cutters are harder, stronger, and more wear resistant than high-speed steel for the longest life and best finish on hard material. They mill precise notches in rotary shafts to fit machine keys and can also be used for slot milling. 0625 0. Key. Square; rectangular, saddle, gib head, offset and woodruff. Max. 2-1967) appears to say that the depth of the keyseat from the edge of the opening is 0. 2-1967 (R1998) - Engineers Edge. ASME B1. Metric key keyway dimensions per iso/r773. 25 wide w. Clearly if the peg is 1-inch square and the hole is 4 inches in diameter, then the peg will easily fit in the hole, albeit useless. Due to the curvature of the shaft, the depth of cut is greater than H=2, by a chordal height Y = 1 2. When indicating a keyway or keyseat on a drawing, the depth, width, and location should be specified to give the full size and location of where the cut is to be made on the part. 1 Keyway Dimensions - Lowell Corporation Key Size Versus Shaft Diameter ANSI B17. This standard establishes a uniform relationship between shaft sizes and key sizes for parallel and taper keys as shown in Table 1. Parts are dimensioned based on two criteria: Basic size and locations of the features. Created Date: 2/7/2017 11:29:07 AM. TORQUE RATINGS AND DIMENSIONS Bush. Drive End Dimensions (Inches). 42 — 2. SAE Standard. , 13 # of Teeth 60BS13H X 1 7/16. -0. D. If limit dimensions (refer to Tables 13 M and W of the Appendix) were to replace the keyseat dimensions shown, what would they be?23. Foot Mounting B C. scope: 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. Key dimensions: Parallel keys are most commonly used. Create your website today. Check out our 4375 Keyseat Cutter – it was designed for small engine manufacturing and automotive companies where narrow-width slots are necessary. Detailed bore and keyseat information is given on pages 2, 3 and 4. 1 Keyway Dimensions - Lowell Corporation KEYS AND KEYWAYS - Union College Ansi B17 1 Standard Keyway. Nominal Bore Diameter Clearance Bore Interference Bore Keyway “T”-DIM +0. Imperial Woodruff Key Keyway Dimensions Pdf When people should go to the ebook stores, search start by shop, shelf by shelf, it is essentially problematic. The Metric system does not refer to keyseat or keyway dimensions as does the English system. 188In 9-1/2In, 60B38F-1C 60B38F-1C TSUBAKI Single Strand Sprocket, 40 Chain Size, 5/8 Bore Dia. 2. 8 cannot be furnished. 2388 State Route 726 Eaton, Ohio 45320 (937) 456-2232 Fax (937) 456-2282 [email protected] slot 0. Tolerance. 010 Height (d) (t) - DIM Keyway Width (w) AGMA 9002-A86 Inch Bore and ANSI B17. 65 13. ANSI B17 1 PDF - C-4-C Ansi B17 1 Standard Keyway Dimensions Lowellcorp Keyway Dimensions - Armstrong Metalcrafts Ansi B17 1 Standard Keyway Dimensions Lowellcorp Shaft and Hub Keyway and Key Sizes Ansi B17 1. In order to lock a hub or bushing and shaft together, and prevent the shaft from rotating in the bore, a key is commonly inserted into the keyseat that is machined in both the bore and shaft. A. 350 Maximum 2. ANSI B17. 60 degrees from the vertical. Nominal torsional stress τ = T/ ( π/16搞 k3 ), d k =d-t 1. This is to ensure an interference once the key is inserted between the parts. Some machinists use keyseat cutters to machine slots greater than their cutter width. 15In 60 24, DS60ATL24 DS60ATL24 TSUBAKI Sprocket Chain Rlr P Sgl 3/8In 2. This is done with multiple operations so that, for example, a keyseat cutter with a 1/4” cutter width can create a slot that is 3/8” wide. KEYSHAFT Keyed Shaft, Diameter 3/4 in, Keyway 3/16 in x 3/32 in. 5”. There is also a ‘Key Number’ system that is mentioned in the table below as an alternative way of specification. ESR Motor Systems ESR Motor Systems, LLC • 648 E White St, Rock Hill, SC 29730 Phone: (800) 868-3770 • FAX: (803) 324-3259 NEMA – QUICK REFERENCE CHARTShaft keyseat dimensions and tolerances were given in ISO R773:1969. 562 160 6. S AA Min. 375 / . Size Options (Labyrinth Seal, C/T Sprag) Nominal Bore Keyseat Size* Lubricant (Blank - Oil, GR - Grease) Direction of Rotation * If keyseat is not specified when ordering, the clutch will be supplied with the available standard keyseat. 13In, 120A32 120A32Advantages of Chain Dimensions: 1. 1-1943 standard. Also, T 1 and T 2 are not necessarily equal. 095 . Determine the dimensions of the shaft and keyway and develop a dimensioned and toleranced. 003/-0. This International Standard specifies the dimensions of milling cutters intended for manufacturing woodruff keyseats in accordance with ISO 3912. • Choose thickest neck allowable for the most optimized performance. Ht. maintain the bushing’s position on the shaft until the cap. Our new Sure-Flex Plus® EPDM and Neoprene sleeves are best-in-class for coupling performance and value. Keyseat Cutter Considerations: • Select a tool with the shortest allowable overall length to ensure the strongest tool setup possible. 2; ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. 62 1. Key and Key seat DimensionsLeader in Energy Efficient Industrial Electric Motors and Drives L* AC E T6 LUG TERM BLOCKF8. Width Depth 1/2 – 9/16 1/8 1/16 5/8 – 7/8 3/16 3/32 15/16 – 1-1/4. t. Class 1 - A relatively free fit applies only to parallel keys. - Series EL couplings supplied with clearance fit. Keyseat Cutters. industries, particu- larly those involved in world export, have already. In the figure below, notice that the depth of the keyway is indicated from the opposite side of the bore, and the depth of the keyseat is indicated from the opposite. Pitch, 13 Hardened Teeth, 25mm Finished Bore with Keyway & Set Screws 08BS13H X 25 TSUBAKI Sprocket, 25 Chain Size, 1/4 Bore Dia. Show your work below. 91In, 50B13SS 50B13SS TSUBAKI Sprocket Chain Rlr P Sgl 1-3/8In 7. 49 in, Pitch Diameter 2. 5 14 9 71 14 11 5 5 200 55 49 16 10 80 19 15. 3. provides a 32 to 1 locking ratio on the shaft. That means, a one inch shaft should have a quarter inch key. Surface Finish — Sides and bottom of keyways shall not exceed 250 micro inches. 38 - t w . Inch (ANSI/AGMA 9002-B4) shaft to the center of the keyway. Woodruff Key Slot Dimensions; Woodruff Keyseat Dimensions;Inch keys conform to ANSI B17. How much material was added when the change to the bosses was made?20. 3 1-5/8 for 1-1/2 bore, 1-5/16 for 1-5/8 bore. KeyWay. 1-1967 (R1998) Standard Bore and Keyway Tolerances (Inch and mm) Keyseat Dimensions for Woodruff Keys per. About Us Shipping Advantage Customer Testimonials News Company Timeline Careers Return Policy Risk Free Tool Program +1 800 645 5609;ISO 12197:2016 specifies the dimensions of milling cutters intended for manufacturing woodruff keyseats in accordance with ISO 3912. 002/ 0. Bore & Keyseat Dimensions All measurements in inches. IEC Shaft Extension, Principal and Keyseat Dimensions–Continuous Duty AC Motors (mm) NEMA Wavy Extension and Keyseat Dimensions–Foot-Mounted DC Machines (mm) NEMA Frame Dimensions–Foot-Mounted DC Vending (mm) MOTIVE NAVIGATION Power Factor Fix of Incorporation Motor LoadsOrder Tritan Finished Bore with Keyway & SS Bore Sprocket, 60 Chain Size, 1-1/2 Bore Dia. 1875 0. Never used commercially available keystock, it's intended to be filed to fit in the field. Its available in a wide selection of standard sizes and special face widths are also available with our 24-hour just-in-time service. 18 X X X XX X 5J 2783 12 19 48 72 15 23 0. 1875″ Cut Width, 1/2″ Shank Dia, Straight Tooth 2-3/16″ OAL, 8 Teeth, Carbide Tipped, ANSI 609, Old Standard 16 List PriceNote 1: Maximum bore with keyseat. Shaft keyseat dimensions and tolerances were. 75 7 2 2. The cutter bar does not need to be changed in order to cut a different size keyseat. TB Wood's 440 North Fifth Avenue Chambersburg, PA 17201 - USA Toll Free: 888-829-6637 Phone: 717-264-7161 Fax: 717-264-6420AGMA ASA Keyway and Bores Design Data including dimension and tolerances. 2 standards for dimensions and tolerances. 4: tap size and bolt penetration allowance. Key should be a tap fit in the keyseat and stay there. Balance the assembly by adding balancing clay to the workpiece. Over Width, W Height, H Size, bxh 1 1/4. 75 1. When SH 1/2 1-3/8 1-5/8 1-11/16 1. ANSI B17. Always used cold rolled square (for MS shafts). Approximate weight for each hub. 109 - - 0. Detailed width tolerance. These milling cutters are each sized to create keyseats for a specific size of key. 1-1967 (R1998)Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. 50 — 0. • Tool Sets — Metric Precision 3-Flute Cap Screw Kounterbores Sets. 6 - M 18. 093" diameter. Metric External Table Chart Thread Designations Sizes M 1. "KEY-KEYSEAT ASSEMBLIES" tolerances are a funtion on class fit, type key and size. byNEMA Motor Dimensions - Reference Chart Keyseat Dimensions. 453 — flat — 48H 4. 525mm) PITCH SIMPLEX CHAIN DATA: BS 228/3 ISO 06B-1 PITCH: 9. Select delivery location. Dimensions Keyseat Dimensions Fig. ANSI B17. A Key goes into the Keyway to lock things up. 5 42 4. s. Shaft keyseat dimensions and tolerances were given in ISO R773:1969. 2. d. 010" for all sizes above. 86In 80 48, 80SF48 80SF48 TSUBAKI Single Pitch Roller Chain Sprockets, 80B13SS 80B13SS TSUBAKI Sprocket Chain Rlr P Sgl 5/8In 2. Key Keyseat - Shaft hbove Keyseat - Hub. B +0. Nominal Key Size W x D Min. 8. Refer to page 3 to order the required coupling. For a square key, H= W. Corner Radius Harvey Tool's selection of fully stocked, corner radius Keyseat Cutters includes standard, reduced shank, and staggered tooth designs. Keyseat shaft. 000 0. Bushing Torque; Capacity (NM). 0005” +. 66 10 2 5 12. 4. Our massive line of Miniature Keyseat Cutters is unmatched in the industry, featuring hundreds of specialty sizes and styles. Key and Keyseat Dimensions. They have an alternating right- and left-hand tooth style for removing more material at high speeds than straight-tooth keyseat cutters. , 30 # of Teeth 35BS30H X 1 TRITAN BushedRlrChnSprkt, QuickDetach, SF, 11/4in 100SF17HCollegeANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. Max. Whenever I had to end mill or side mill a keyseat I usually got lazy and sunk the cutter 'til the corners intersected the shaft diameter then I dialed into the shaft 1/2 the key height (remembering the clearance goes in the keyway of the mating bore. 19-1997; Design of Square Key and Keyway (Wood Ruff) Stress, Shear. AA dimensions shown in chart are legacy Baldor-Reliance typical values meeting or exceeding NEMA. All dimensions given in inches. For checking an assembled key and shaft, caliper measurement J between top of key and bottom of shaft is used. 4. 1: 1/16 " 1/2 " 0. 1 Keys and Keyseats, based on current industry practice, was approved in 1967, and reaffirmed in 1989. , 16 # of Teeth, 40BS16H X 1 1/4 at Zoro. Keyseat Dimensions Keyseat is an axially located rectangular groove in a shaft,hub or bushing. American National Standard, B17. See dimensions W and h in Figure 1. 004 0. The desired fit is a tight fit of the key in the keyseat of the shaft and in the keyway of the bore hole. 328 Flat 48 3. For instance, a 1" x 1/2" keyway on a 5" diameter shaft I would go . Some machining operations are not only impractical but also impossible without woodruff keyseat cutters. 2. web woodruff keyseats key seat shaft key above shaft keyseat hue number 202 5 302 5 505 120b n size key 1 16 x 1 16 x 5 16 3 32 5 16 38S x 3/4 in. The annexes also include the recommended design practice for tapered shafts for use with flexible couplings. 1051 Aviation Blvd. 587. 002 . 75 2. a. keyseat dimensions chart with U = 2. 2. Best Match; Price: Highest First; Price: Lowest First; View: 12 12; 24; 42; SK-500-125 INTERNAL TOOL CARB KEY CUTTER. 19-1997; Design of Square Key and Keyway (Wood Ruff). Refer to charts below for bushings. 414 Maximum 2. Description: The Morrison Keyseater is built to ensure an accurate keyseat. 2. Shaft keyseat dimensions and tolerances were given in ISO R773:1969. Single Tooth Cutters: Single tooth cutters are not only for accuracy but eliminate time and trouble in sharpening. Dec. In order to lock a hub or bushing and shaft together, and prevent the shaft from rotating in the bore, a key is commonly inserted into the keyseat that is machined in both the bore and shaft. Might I also recommend looking at. These woodruff keys are mostly used in machine tools and automobile shafts from ¼” to 2½” (6 mm to 60 mm) in diameter. The Woodruff Key numbers indicate normal key dimensions. 12 10 r. BOX 2400 FORT SMITH, ARKANSAS 72902-2400 U. Key sizeMetric key keyway dimensions per iso/rtt3 js9 width Metric machine keysWoodruff dimensions standard keys table inches ansi given. , 18 # of Teeth 40B18F-5/8 TSUBAKI Single Pitch Roller Chain Sprockets, 16B20 16B20Key and Keyseat Dimensions FrameD G F GD Frame D G F GD 63 8. Keyseat Cutters. In a bushing or hub it is sometimes called keyway. thru 3/4 in. Gear Products and Suppliers | Gear Knowledge Menu. 512 140 5. TSUBAKI Single Strand Sprocket, 50 Chain Size, 7/8 Bore Dia. The keyseat engages with the key on the part to prevent unwanted rotation of the part when it is mounted to the shaft. Shaft with Two Keyways Torque Applied Deformation and Stress Equations and Calculator. Nominal Shaft Diameter Nominal Key Size Normal Keyseat Depth Over Up to and Incl. KeyWay. 125 Thick # 406 product page with images and specifications High Quality PRECISION Tool Holders, Collets and Machine Accessories. Index the adapter 180 degrees on rotor shaft (see Figure 6-22 C). BALDOR ELECTRIC. 000/+. 1 ; Shaft Arbor and Keyseat Dimensional Data ANSI B94. Precise taper (3/4 in. It’s beneficial to know when and how to pick the. D. The width of a square or flat key should be ¼ of the _____ of the shaft. Leader in Energy Efficient Industrial Electric Motors and Drives Key and Keyseat Dimensions Frame D G F GD Frame D G F GD 63 11 8. Made in USA. All dimensions are given in inches. Other data in this standard are given in Tables 2 and 3 through 7. 5 6. 000 1. 0005” including 2” +. Hey, Just curious if anyone had run across Table 6 in B17. All dimensions are in inches. 2 COPYRIGHT 2003; American Society of Mechanical Engineers Document provided by IHS Licensee=Cummins. 376 . Using information from the table below, determine the dimensions of the shaft and keyway and develop aWhere standard keyseats are indicated, refer to the Standard Keyseat Dimensions chart. xls Created Date: 1/23/2014 8:35:20 AM. Kramer has a keyseater. M-42 Cobalt works great in all types of materials and will give much better tool life than M2 or M4 tooling. 14 X X X X X 4J 2263 11 16 41 60 11 16 0. 3 Protection against falling water up to. 0005” +. -AND OPTIONALLY3) Drawing or sketch of equipment layout in order to determine correct spacer length. 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. This is why we allow the book.