B +0. Two types of woodruff. 1-1967 (R1998)Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. Taper-Lock Bushing Keyseat Dimensions Bushing Bores (in) Keyseat 1008 0. ANSI B17. They have an alternating right- and left-hand tooth style for removing more material at high speeds than straight-tooth keyseat cutters. zComplete design details of keyseat and key for fabrication. 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. Determine the keyway & keyseat dimensions and tolerances (class 2) for the above for a square key of the recommended size. 5 times the shaft diameter to ensure a good. keyseat dimensions chart with U = 2. 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. View More. O. Woodruff Key Slot Cutter Dimensions Mountain Lake Casino Belvidere Nj Poker Hollywood Casino Charles Town Tempat Beli Chip Zynga Poker Raging Bull Casino Bonus Codes 2019 Download Casino King Part 1 Full Blackjack Billy Booze Cruise Ringtone. Woodruff key slot dimensions keys 4 1 key fa r cutter dimensions size chart keys. Bushing Bore Keyseat. 512 200 300 359 416 180 9. IEC QUICK REFERENCE CHART IEC Frame. S. 2; ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. per ft. 587 / 2. Joined Feb 24, 2011 Location Pensacola, FL. REFERENCE DEPTH. system are its superior holding power in both lateral and tor- sional directions, its ease of assembly and disassembly and its self. Lg. Detailed width tolerance. 3 Protection against falling water up to. 5000 2. Dimensions Keyseat Dimensions Fig. 2. Bore Diameter Size Bore Reference -0. Key and Keyseat Dimensions FrameD G F GD Frame D G F GD 63 8. Metric key & keyway dimensions per iso/r773 – js9 width tolerance « + keyways will be furnished per iso/r773 and js9 width tolerance unless otherwise specified. 2-1967 (R1998) - Engineers Edge. Keyway key parallel jis sizes tolerances 1301 mm 1996 pulley excerpt unit techKeyway metric Table aii-12. Metric Key Keyway Dimensions; Parallel Key and Taper Keys Dimensions; Shaft Keyway Shear and. This standard presents metric dimensions, tolerances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. 5 4 4 180 48 42. 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. Precise taper (3/4 in. 42 — 2. 80 73. Dimensional data for 444T through 449TS frame sizes refl ect the use of a top mounted conduit box with a cantilevered mounting arm. Hardware ANSI Menu All dimensions are given in inches. 75 2. KOP-FLEX Disc Coupling Center Assembly - Style Kd20 - Size 204,204 Kd 20 Ca900 204 KD 20 CA900 CLIMAX METAL PRODUCTS 150mm X 200mm Locking Assembly Series C123 C123M. Great prices & free shipping on orders over $50 when you sign in or sign up for an account. 5000 2. Rectangular keys. Located in Warren, Michigan, KEO has been producing the best in performance cutting tools since 1941. As a general rule, the key is a tighter fit to the shaft so that the key remains on the shaft during assembly and removal. Without any physical obstructions surrounding the motor, two 324T motors will mount onto the. 02 to be 63 scale drawn as shown c. 437 / . NOMINAL SHAFT DIAMETER I NOMINAL KEY SIZE I NOMINAL KEYSEAT DEPTH *Some key standards show 1-1/4 in. In some cases, as the bore increases in diameter, a shallow keyseat is provided—due to insufficient metal thickness. 40 3/8-16 28 19 30 16. O. 12 — 0. We have 33 solutions for your book! Solutions. Hardware ANSI Menu. 24-5/8. Woodruff Keyseat cutters are designed for cutting keyways and keyseats as well as performing general purpose milling operations. Dimensioning repetitive features Repetitive features and dimensions may be specified by the use of an “X” in conjunction with the numeral. Keyseat Alignment Tolerances: A tolerance of 0. Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. Note that metric keys are. /lbs . ANSI Key No. Distance from the keyseat base to the cylinder axis, with the base dimension 1. G&G Manufacturing Company 4432 McKinley Street P. 493. 1 shows a keyseat for a shaft diameter D, key width W, key height H, and fillet radius r. 480 100. The flanges and bores involved are as follows: Size Bore Range KS Key Furnished 6C 1-11/16 to 1-7/8 1/2 x 1/16 1/2 x 5/16 x 1-15/16 8C 2-5/16 to 2-3/8 5/8 x 1/16 5/8 x 3/8 x 2-1/2Keyway Connection. Table 3 Keyseat Dimensions. 016 1/64All dimensions given in inches. This standard presents metric dimensions, toler-ances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. nema keyseat nema keyseat shaft dimensions shaft dimensions (u) (r) (s) (u) (r) (s)Woodruff Keys ANSI B17. 5 66225 60 53 18 11 90 24 20 87250 70 67. 19 ; Keyseat Design Tolerances for Electric Motors and Generators; Arbor Keyway Cutter Hole KeywaySize Available: 1/4 to 1-1/4. Keyway Sizes. js9 widthHere's a quick reference guide to common keyway profiles. 844”, and S = 0. 2180 Corporate Lane, Suite 104 ~ Naperville, IL 60563 USA Phone (630) 596-9000 Fax (630) 596-9002 E-mail: [email protected]/-0. Sure-Grip® Bushing Keyseat Dimensions (mm) *Shallow key furnished Shaft Dia. This specification includes index tolerances for multiple keyways. (b) Determine the minimum diameter of shaft a for a safety factor of 2 based on static yield analysis. Chain dimensions are easy to navigate through for analysis purposes, as each level is clearly linked back to the previous one in. ) DIMENSIONS IN INCHES Bolt Circle Cap Screws Required Weight Typical Material Steel Cast Iron Ductile A B D E F L Iron QT 1,750 1/4 1. The advantages of the 0. Frame L449T is not included in this chart. Mount the adapter to the workpiece shaft using a full key in the shaft keyway and fill the half-key void in the opposite side of the adapter with a half-key (see Figure 6-22 B). , 16 # of Teeth 50B16F-7/8 TSUBAKI Single Pitch Roller Chain Sprockets, 60B36F-1 60B36F-1 TSUBAKI Single Strand Sprocket , 40 Chain Size, 42 # of Teeth 40BTL42 TSUBAKI Sprocket Chain Rlr P Sgl 1-1/2In 16. 248 0. I need the dimensions of a #406 Woodruff Key and Keyseat. 005 Min Diameter F. For a square key, H= W. limit dimensions refer to Tables 13 M and W of the Appendix) were to replace the keyseat dimensions shown, what would they be? 23. thru 3/4 in. I need the dimensions of a #406 Woodruff Key and Keyseat. Install Hubs Set Spacing Install Element. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. Dimensions should specify only the size of a feature. For more exact dimensional data, please check the specific drawing for each catalog number. Electrical Engineering Pocket Handbook. Inaccurate keyseats cause needless expense and delays in fitting. or material and filtering by the precise dimensions Catalog; About Us. maintain the bushing’s position on the shaft until the cap. Straight teeth provide better surface finish. PIECES SIZE PIECES SIZE 10 10 10 10 10 10 10 5 5 6x6x12 6x6x20 6x6x35 8x5x16 8x7x16 8x7x25 8x7x45 10x6x30 10x8x25 5 5 5 5 5 5 10x8x50 12x6x50 12x8x30 12x8x50 14x9x32 14x9x60 KEYS IN PLASTIC CASE DIN 6888 WOODRUFF KEY KIT PIECES SIZE 20 20 20 20 20 20 20 2x2. The standard key size for a straight key in a shaft is one quarter the shaft diameter. key. Size Shaft Dia. Some machinists use keyseat cutters to machine slots greater than their cutter width. 1 Keyway Dimensions - Lowell Corporation KEYS AND KEYWAYS - Union College Ansi B17 1 Standard Keyway. maintain the bushing’s position on the shaft until the cap. 19 ; Shaft Arbor Keyway. Differences Between Keyseat and Keyway. Dec. 51966 2256053 18 11 90 20248 7 2506567. Keyseat and keyway General dimensioning – Cont’d • Dimension keyseats from the bottom of. Use them in light duty applications to connect gears and other components to shafts. Some machining operations are not only impractical but also impossible without woodruff keyseat cutters. Our exceptional quality and service has allowed KEO to become a world leader in the cutting tool industry. -0. 5: conduit box may be located on either side or on top of. ) Kilos Catalog Number Weight. 000. directions, limited ingress. 0015” Over 2” +. ANSI B17. Recommended ANSI Standard Keys and Keyseats Design per. Key and Key seat DimensionsLeader in Energy Efficient Industrial Electric Motors and Drives L* AC E T6 LUG TERM BLOCKF8. S. TRITAN Finished Bore with Keyway & SS Bore Sprocket, 40 Chain Size, 3/4 Bore Dia. Weights are approximate in pounds. I will be attaching two sprockets to each shaft in the center. Horizontal Shaft Arrangements. 06 0. The keyseat engages with the key on the part to prevent unwanted rotation of the part when it is mounted to the shaft. com ©2004-2021 Kramer Power Equipment Co. * contact your local baldor nema -quick reference chart office for "c" dimensions dimensions - n, o, p, ab and xo are specific to baldor baldor electric company p. 240 0. Sometimes the size and the tolerance for a shaft diameter are dictated by the element to be mounted there. Ansi B17 1 Standard Keyway Dimensions Lowellcorp Keys and Keyseats - ASME Shaft Key Seat Depth Control Values S and T for Shaft and. *Contact your local Baldor office for “C” Dimensions. Tolerance. Carbide Staggered-Tooth Keyseat End Mills. 0000000. Placed directly on a feature to identify a specific size or they may be connected to a feature in the form of a note. 2. 0005” +. In order to lock a hub or. Shaft keyseat dimensions and tolerances were given in ISO R773:1969. box 2400 fort smith, arkansas 72902-2400 u. If you look up ANSI keyseat dimensions for woodruff keys in the machinery's handbook it is drawn exactly like your example. CollegeANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. The more important shaft dimensions are the diameters of all the other mating components. ”- Series F couplings supplied with 4) All dimensions per AGMA 9002-A86 interference fit bores without set screws commercial standards. Rectangular keys. Max. 0015” Over 2” +. 10 THREAD CONTROLLING ORGANIZATION AND STANDARD - ASME. Note: When ordering, add the Q-Style Bushing prefix BSHQD to the indicated part number. KeyWay. Metric – Rectangular B. May 27, 2011Keyseat Dimensions for Woodruff Keys per. 1 Size Shaft Dia. Please refer to the Large AC motor chart, or to the specific motor drawings for L449T dimensions. Order Tritan Finished Bore with Keyway & SS Bore Sprocket, 40 Chain Size, 1-1/8 Bore Dia. The last two digits give the nominal diameter B in eighths of an inch and the digits preceding the last two give the nominal width W in thirty. 104 0. ANSI B17. Foot Mounting B C. BOTTOM OF SHAFT TO BOTTOM OF KEYWAY. Square Drives for Socket. 35mm (0. Use these end mills for general purpose keyseat cutting in a wide range of material, including aluminum, iron, and steel. 005-0. Undersized Machine Key Assortments. Related: Shaft Key Seat for Shaft and Hub ANSI B17. 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. The last two digits give the nominal diameter B in. Shank Size: . Provides strong connection can be either parallel. In these cases, a rectangular key is furnished. 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. Also calculates overall shaft and bore values, and chord depth. 000 +0. 3750 1. 1265 0. This standard covers nomenclature, definitions, identification number, dimensions and tolerances of Woodruff Keys and Keyseats. Hub keyseat has been sometimes referred to as a keyway. Two types of woodruff keyseat cutters with cylindrical shank are specified: — woodruff keyseat cutters with cylindrical shank, in accordance with ISO. 77 . Related Resources: gears Shaft Diameter vs Key Sizes Design Recommendations. 1890 0. Parts are dimensioned based on two criteria: Basic size and locations of the features. Bushing. 19 ; Keyseat Design Tolerances for Electric Motors and Generators; Arbor Keyway Cutter HoleKey and Keyseat Dimensions Frame D G F GD Frame D G F GD zoo 10. All dimensions are in inches. 6 LUG TERM BLOCK. KEYSHAFT Keyed Shaft, Diameter 3/4 in, Keyway 3/16 in x 3/32 in. Except JAM D. 000 inch: Tolerance zone width: [x]; Required measurement precision: [yl; Required instrument resolution: [z] Problem 2 (15points) A data set, Table 1, contains collected inspection measurements of dimension 2. nema keyseat nema keyseat shaft dimensions shaft dimensions (u) (r) (s) (u) (r) (s) Woodruff Keys ANSI B17. The keyseat engages with the key on the part to prevent unwanted rotation of the part when it is mounted to the shaft. Many old timers stone the sharp corners off an endmill or a keyseat cutter to reduce stress risers in the shaft. These milling cutters are each sized to create keyseats for a specific size of key. ) 2 in; See all product information Get 10% off your order U. Carbide Staggered-Tooth Keyseat End Mills. , 18 # of Teeth 60B18F-1 TSUBAKI Sprocket Chain Rlr Sgl Dbl 6. In these cases, a rectangular key is furnished. Published: August 2018. 5 20 24 24 33 424 5 6 8 8 8 10 12GD. KEYSEAT-SHAFT K E Y ABOVE SHAFT KEYSEAT-HUB. 1 july 03 “t” frame electric motor data chart 1. Feet prevent these keys from rocking in the keyseat. 28 slot 0. B L F A E. ANSI B17. 005" up to 1/4 and 0. Specification for metric keys and keyways – Parallel and taper keys BS 4235-1:1972;Key stocks sizes various. Woodruff keys work well near shaft shoulders and on tapered shafts. Standard keyseat milling cutters, also known as Woodruff cutters, create keyseats in shafts for mating keyed parts to the shaft. 500 - 0. 1875 0. Max. While this is possible and may save on up-front tooling costs, the results are not optimal. 12 0. It cuts up to 2. , 17 # of Teeth 60BS17H X 1 1/4 TRITAN Finished Bore with Keyway & SS Bore Sprocket, 40 Chain Size, 1 Bore Dia. NEMA FRAME DIMENSIONS* FOOT-MOUNTED AC MAChINES * Dimensions in inches E "H" DIA. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. BOX 2400 FORT SMITH, ARKANSAS 72902-2400 U. 75 7 2 3. Determine the dimensions of the shaft and keyway and develop a dimensioned and toleranced. 4JSC x 1-1/8 has 1/4 x 1/16 shallow keyseat. 00 2. 6-hole drilling (most sizes) makes installation and removal quick and easy. The cutter bar does not need to be changed in order to cut a different size keyseat. 0005” including 2” + . Table 11 on page 955 (18th edition) titled "USA Standard Keyseat Dimensions for Woodruff Keys (USAS B17. Keyseat Size (In. Dimensions Keyseat Dimensions Fig. 3 Protection against falling water up to. When installing a woodruff key into a half moon keyseat, first press it into the semi‑circular groove which is milled into the shaft by a woodruff key cutter. 75 wide was +0 -. Our massive line of Miniature Keyseat Cutters is unmatched in the industry, featuring hundreds of specialty sizes and styles. Question 5: You have been tasked with designing a rectangular keyseat in a power transmission shaft. ASME B1. Due to the curvature of the shaft, the depth of cut is greater than H=2, by a chordal height Y = 1 2. The width tolerance controls the size and form of the keyway, and the position tolerance controls the location and orientation of the centerplane (usually with the axis of the shaft OD as the datum feature). Select the Woodruff Cutter from the tool menu (Note: Keyseat cutters are referred to as Woodruff cutters for feeds and speeds): 4. 5 2012 10028 248 7 28075 712214 11228 248 7 31580 762214 13238 3310 8 35585 762214 16042 37 128 *Contact your local Baldor office for “L” Dimensions. 406 1. ) None; Bushing Required 3020; Width (In. Metric keys conform to DIN 6888 standards. note: with vescors' policy of constantly improving its products, specifications are subject to change without notice. See dimensions W and h in Figure 1. NOMINAL SHAFT DIAMETER. Thanks in advance. 2: largest motor width. The following sections describe key and keyseat dimensions, keyseat failure, and key failure. 1 Square Keyway Tolerances Minimum 2. ) Abom79 Stainless. 69 2. Keyseat cutters: easy guide to keyway, key, & keyseat cnc workStandard shaft sizes key bushing table qd non bore keys shallow range gates includes specific each also Keyway-and-key-size-dimensions. Bore Diameter Size Bore Reference -0. 360 Minimum 2. , 18 # of Teeth, 60BS18H X 1 1/2 at Zoro. maintain the bushing’s position on the shaft until the cap. 6 6. Related: Shaft Key Seat for Shaft and Hub ANSI B17. ASME B1. What dimension is indicated as not drawn to scalo? 24. x 1/4 in. 1 Keys and Keyseats, based on current industry practice, was approved in 1967, and reaffirmed in. Forces Exerted on Shafts • Gears, belt sheaves, chainBritish ISO Metric Screw Threads Designations. 328 Flat. 00 1. 0020” Standard Keyseat Dimensions Shaft Diameter Width. These woodruff keys are mostly used in machine tools and automobile shafts from ¼” to 2½” (6 mm to 60 mm) in diameter. Shaft diameter is 3/4". 3115 0. For example, a 3/16"x3/4" key (#606). English Standard Keyway and Key Sizes Shaft. 12 2. Fax: (916) 993-3949. Keyseat Alignment Tolerances: A tolerance of 0. If limit dimensions (refer to Tablas 13 M and W of the Appendix) were to replace the keyseat dimensions shown, what would they be? 23. 007 0. For a square key, H= W. 4 Protection against splashing water from all. , 20 # of Teeth 60BS20H X 1 1/2 TRITAN Finished Bore with Keyway & SS Bore Sprocket, 35 Chain Size, 1 Bore Dia. 093" diameter. Over Up to and Incl. 5000 1. Nominal Bore Diameter Clearance Bore Interference Bore Keyway “T”-DIM +0. 5000. Frame L449T is not included in this chart. 3125 2. 093 / . 75 7 2 2. Great prices & free shipping on orders over $50 when you sign in or sign up for an account. The Metric system does not refer to keyseat or keyway dimensions as does the English system. 12 0. 000 Less than 12 12 and Larger Maximum Permissible Eccentricity1 Scope. 202 to 1012 Height Width Diameter Actual Length Full Radius Flat Bottom Distance Key Below Center No. Details. Key Size Versus Shaft Diameter ANSI B17. Here we can calculate rigid connections, namely the pinned, keyed, splined and flanged ones. 360 Minimum 2. 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. Precise taper (3/4 in. com. 010 0. Preferred size is 1-1/2 in. Square profile keyseat cutters, both sides of which are dished for clearance, offered in sizes as small as . As shown by the last equation in the box, key stress equals shaft stress when the key (or hub) length is 1. 376 . Thanks for the info. 201 202 1/16 x 1/4 0. ForFractional inch dimensions (Fig. 1 ; Shaft Arbor and Keyseat Dimensional Data ANSI B94. 2388 State Route 726 Eaton, Ohio 45320 (937) 456-2232 Fax (937) 456-2282 webmaster@kramerusa. Taper keys are established for. 11In, 60B28F. 50 0. Related Resources: gears Shaft Diameter vs Key Sizes Design Recommendations. 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 +. Please call for quote. X-Style Bushings - XTB Bore & Keyseat Dimensions All measurements in inches. Please call with any questions. 8 products. Instead, key dimensions are specified. 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. Details of a part's construction and for manufacturing. 1. 40 1. 24-5/8. TSUBAKI Sprocket , 35 Chain Size, 5/8 Bore Dia. Keyway standard dimensions keyseat pdf printer friendly information. 1890 0. 477This standard presents metric dimensions, toler-ances, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. The keys and keyways followed the recommendations of ISO R773:1969 and shaft tolerances followed ISO R775:1969. Types of Keys. TSUBAKI Single Strand Sprocket , 60 Chain Size, 3/4 Bore Dia. A. provides a 32 to 1 locking ratio on the shaft. Number of pages: 118. shaft to the center of the keyway. This International Standard specifies the dimensions of milling cutters intended for manufacturing woodruff keyseats in accordance with ISO 3912. 40 mm. Another name for a Keyway is a Keyseat, since the. 91In, 80B20F-1G 80B20F-1G. Metric External Table Chart Thread Designations Sizes M 1. 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 +. Standard sizes shaft key bushing bore table keys non shallow bushings taperlock gates required specific includes eachTranseals. Best Match; Price: Highest First; Price: Lowest First; View: 12 12; 24; 42; SK-500-125 INTERNAL TOOL CARB KEY CUTTER. 4235 : PART 1 : 1972Keyseat Dimensions A Keyseat is an axially located rectangular groove in a shaft,hub or bushing. 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. Keyseat Cutter Considerations: • Select a tool with the shortest allowable overall length to ensure the strongest tool setup possible. ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. 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. BTS Flange, No Keyseat, High Strength Cast Iron Material Model: 8SMPB. a. Keyway sizeDimensions standard keyseat keyway shaft shafts diameter nominal Metric key keyway dimensions per iso/r773. , 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. This may also be written as shaft keyseat or hub keyseat when describing the exact 1/2 3/4. 5 149 71 14 115 5 20055 491610 80 15. , 20 # of Teeth 50B20F-3/4 TSUBAKI Sprocket Chain Rlr P Sgl 15. Inspection methods for straight and tapered bores and keyways are included in the annexes. Square; rectangular, saddle, gib head, offset and woodruff. Great prices & free shipping on orders over $50 when you sign in or sign up for an account. 1 Size Table. 000. Box 12086 Omaha, NE 68112-2086NEMA Keyseat Dimensions–Foot-Mounted AC & DC Machines IEC Shaft Extension, Key And Keyseat (Keyway) Dimensions Square And Flat Stock Keys Standard Keyseat Sizes Metric Keys–Standard Sizes. 5505 deep from touch, making it 1/2" deep on the wall. 00 2. CHAMFER STARTING END OF ALL. 66 10 2 5 12. Key. 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.