Woodruff keys work well near shaft shoulders, where a standard open keyway would create too much stress. A Woodruff key, Fig. They also serve as a failsafe, preventing expensive parts from shearing under extreme loads. But ensure the weakened shaft can support the load. 000mm. 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. Metric standard keyway sizes_联轴器厂家-guangzhou link automation140pcs assortment 30mm keys 16mm. S. Keys 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. I thought I saw once it was 3/16 x 5/8. Part Width Height Length circ. Product Description. 000 / +0. Use them in light duty applications to connect gears and other components to shafts. $1999. The standard key size for a straight key in a shaft is one quarter the shaft diameter. They are also designed to protect a power transmission application by failing first, which protects other component elements. MPa. Never use a too small a key. 0. Woodruff key: [noun] a shaft key made in the form of a segment of a disk and used with shafts not more than 2¹/₂ inches in diameter. Gib head keys are specially manufactured machine keys with a projecting end that resembles the end of a gib and serves as a stop mechanism on a rotating shaft. $965. Undersized Key Stock Assortments. 8 out of 5 stars. Total. The middle portion of the key has a gap to fit the hub. 2; ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. The best possible approach to measuring a half-moon key is to either use the sizing chart (provided below) or to take a caliperand take the measurements yourself and cross. Woodruff key is essential for operating high speed. 1563″ OAL, 6 Teeth, Carbide Tipped, TiN Finish, ANSI 507, Old Standard 10 List PriceDIN 11023. Recommended ANSI Standard Keys and Keyseats Design per. Also Available in Nickel and Dacromet Coated Roller Chain. ANSI Woodruff Keys. Woodruff keys work well near shaft shoulders and on tapered shafts. com: steel key stock, standard tolerance, metric, 2 mm thickness. pdf), Text File (. . check this eBay ad to see what I mean. Nominal Shaft (Arbor) and Keyseat Cutter Hole Diameter. 04MBWant to learn more about Key Stock and Machine Keys? Visit us on Facebook, Twitter, and Li. 875″ Cut Dia, 0. 1. 7 10 9 . Specification. HaSaoMoi 200pcs Metric Woodruff Key Assortment Kit with 15 Most Popular Sizes - Woodruff semicircle Key - Half Moon Key - Keyway - Shaft Crank Key. 424 Minimum 2. By starting the calculation under 'Calc' you confirm that you have read this article and agree with the content. 2mm. 3 16 10 59 65 18 4. The 200-series is full radius; all other Woodruff Keys have a flat bottom. Keys and keyways secure the hub and shaft to prevent relative movement between a power transmitting shaft and an attached component. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. Min. 0mm to 26. From helpful tips to brand recommendations, here’s everything you need to find. . Woodruff Keys - Metric. Keyshaft keyed shaft, diameter 1 7/16 in, keyway 3/8 in x 3/16 inGates belts, hoses, and applications: standard & non-standard shaft key Keyseat dimensions for woodruff keys per. Keyseat cutters allow for the precise milling of shafts that accept metric woodruff keys. Keys 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. Select a tool with the shortest allowable overall length to ensure the strongest tool setup possible. BS 5686:1986, ISO 14-1982: Specification for straight-sided splines for cylindrical shafts: metric nominal dimensions, tolerances and gauging requirements. 2; Thread Shear Area for External and Internal Formulas and Calculator per. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. 95 $159. Per BS 4235-1:1972: Specification for metric keys and keyways – Parallel and taper keys. but by the time you blow it up to a bigger size , it gets kinda fuzzy . 2 with table design. Metric Woodruf Keys Nom Key Size (bxD) MF Ref Price each Nom Key Size (bxD) MF Ref Price each 2x7 MF-WK0207 £1. Polaris Ranger Woodruff Key #404, Genuine OEM Part 7721131, Qty 1. Please refer to our size table for detailed size. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. 10. Gates belts, hoses, and applications: standard & non-standard shaft key. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. Related Products. These sizes cater to different shaft. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. The Woodruff Key numbers indicate normal key dimensions. Add to List Request CMI Labels. Estimated Ship Date: Today. EQS-B2-1 1. Key dimensions: Parallel keys are most commonly used. C +0. Play at home fun casino games for free and win big rewards. Parallel machine keys are made with both ends round, both ends square, or one round and one square end. The key seat has to be precisely cut according to the key size to accommodate the key and prevent any interference between the key height and the depth of the host shaft’s key seat. We additionally present variant types and also type. These Woodruff keys are mostly used in machines, tools & automobile shafts ” to 2½” (6 mm to 60 mm) in diameter. 4mm x 6. DIN 6888. gob. and are backed by the manufacturer's 12 month, 12,000 mile. Woodruff Keys: Definition, Types, Uses, Sizes, Operation, Material, Working, Applications, Advantages & Disadvantages :-Woodruff can be defined as a semi circular of half moon shaped, partly fitting in a circular segment keyway and remainder in the longitudinal slot of the keyway (woodruff keyway are semi circular pocket which is drawn in shaft for the placement of woodruff key) in mating part. Keys and keyways. Choose from. 2 X 3. Lid Chart. 4. 5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 11/16" 3/4" 13/16". I called around to the local autoparts stores and Chevy dealership, but no one lists the key in thier catalogs. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. 11057 Metric Woodruff Key 3 x 5mm (Din 6888)10 x S. 93. WOODRUFF KEY DIMENSIONS - METRIC - BS4235:2 -1997Drill Size & Decimal Equivalents: Imperial Tap Chart: Keyway Dimensions: Melting Points: Metric Tap Chart: O-Ring Sizes: Pipe Threads:. All dimensions are in inches. 114" 0. Ball, Unflanged, Metric Size; Ball, Extended Inner Race; Plastic Ball Bearings; Thin Series Bearings. 1. All dimensions are in inches. woodruff key size chart . js9 width. 11060 Metric Woodruff Key 5. In stock and ready to ship. a good quality woodruff key is made to the ANSI B17. BS ISO 4156:2005_1: Straight cylindrical involute splines. 477Decimal Equivalents Chart; Safety Data Sheet - Carbide; Safety Data Sheet - High Speed Steel; Custom Tools; News; Contact; Products > Milling Cutters > Keyseat Milling Cutters > Keyseat Milling Cutters. Key Size 10 mm × 16 mm (10 Each) Plastic Box: 000000000: 000000:Woodruff Keys. Made in USA #808 Standard Woodruff Key. Woodruff keys may be full radius or flat bottom, but the keyseat will always be radiused by the keyseat cutter / woodruff cutter. 010 Height (d) (t) - DIM Keyway Width (w) AGMA 9002-A86 Inch Bore and ANSI B17. Woodruff keys and keyways. -0. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. 11059 Metric Woodruff Key 4 x 6. 3/16 X 1. Ladieshow Woodruff Key Kit,80Pcs Stainless Steel Semicircular Woodruff Key set with storage Box,Assortment Various Sizes (10pcs per Size) 6. In Stock . The Woodruff key slot milling cutter (Figure 4-36) must have the same. Apr 02, 2019 woodruff key slot dimensions key sizes imperial dimensions sizing chart mechanical size medium cutter metric key. 95. Keyseat Design Tolerances for Electric Motors and Generators. Shaft motor keyMotor shaft key size Improved shaftsStandard woodruff keys. Item #: 10-087-005. The key length should be less than about 1. 000000000. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. 6. Pioneer Shaft Keys 839009 Crankshaft Keys, Short Type, 0 degree Offset, Steel, Natural, 0. Note that metric keys are rectangular in shape, and not square as in the English system. 877-346-4814. YOU PICK SIZE FROM VARIATIONS si in chart below. I will be attaching two sprockets to each shaft in the. Last edited: Nov 23, 2020. The woodruff key fits in a half-moon shaped slot, in a shaft, leaving the flat side of the tab exposed. Examples of Woodruff keyseat cut- shown on page 869. WIDTH. 350 Maximum 2. • Creating channel grooves. 0. Can tolerate great strain, making rollover unlikely; 8 assorted sizes Woodruff Keys ANSI B17. Flange Data. Steel keys offer good strength. --keyway dimensionsKeyway chart diagram hallite. 015 364. To ensure reliability, purchase Honda part # 5-09737-003-0 Key, Woodruff Crankshaft. Metric keyseat cutters are made of HSS. -0. We manufacture several kinds of machine keys in many sizes: Woodruff keys are half-circle shapes, with radius or flat bottoms. Nominal Key Size W x D Width Diameter Height Full Radius Flat Bottom 201 206 207. Contact us today at: RCHCTSalesarchgp. 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. Contact us today at: RCHCTSalesarchgp. N = Number of Keys (same size) Keyway application design factor K d. 0 x 5. Check Details. Woodruff Keys are an alternative to Parallel Keys. 4. Tight Fit Key / Key slot K s = K a K d / K f. As noted above, when selecting a keyway tolerance, there are two common selections in the metric. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. For technical drawings and 3-D models. Woodruff Key (5-Pack) Woodruff keys are semi-circular keys that are commonly used for mechanical applications. Filter Results. 2 1967 (also ISO 3912 - 1977) standard to make them interchangeable. Available in individual pieces or assortment kits. Secure sensitive lighting equipment; these switches have a round key that is difficult to duplicate. 7mm 2mm x 5mm 2. Metric module, side fit. FREE SHIPPING IN LOWER 48 STATES! All Red Boar Chain chains are solid roller, #120 and larger are solid bushing solid roller ensuring a longer wear life than split roller and split bushing chain. Reply Quote. Depth values for shaft keyseats - hub keyways Fit tolerances for parallel and taper keys Gib head dimensions for taper keys Key size versus shaft diameter Set screws for use over keys Parallel and taper key dimensions and tolerances Woodruff key sizes and dimensions Woodruff keyeat dimensions 3. Add to Shopping List. 25 - M 1. Find #404 Standard Woodruff Key at MSC Industrial Supply, serving the metalworking, safety, and MRO industries for over 75 years. This does not include the little hump of the shaft that gets removed. Rec. 5 mm × 2. Read more on how keys and keyways work and what types are available – Keys and Keyways. Mfr Part #. Woodruff Key Depth Chart Pdf Eventually, you will totally discover a supplementary experience and ability by spending more cash. Standard Woodruff Keys - Metal Fasteners ANSI Standard Dimensions. This standard covers nomenclature, definitions, identification number, dimensions and tolerances of Woodruff Keys and Keyseats. woodruff key size chart. My account View enquiries View collections. BS 4235-2:1977, ISO 3912-1977: Specification for metric keys and keyways - Woodruff keys and keyways. Flat. 7x10 3x3. During installation, woodruff keys will sometimes slip out of their groove as the. Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k keyGates belts, hoses, and applications: standard & non-standard shaft key Keyway sizing engineeringMetric keyway chart printable. These cuts could be made using an endmill, but a key cutter is much simpler. 4. The 66-piece stainless steel Woodruff key assortment includes Woodruff keys in various sizes and comes in a compartmented plastic case for storage and organization. keyways & keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keyswoodruff key chart. The Computer-Aided Design ("CAD") files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Full-Radius Woodruff Keys. There are numerous cutter widths and cutting sizes available for key cutters, and a pre-cut key stock is offered in both metric and standard inch sizes. 2 + 0. 3 10 8 39 44 12 3. Key Size 1. A4 stainless steel are also available to order. com: Industrial & ScientificWoodruff Key Cutter Set (10PC) 3/8"-1" - Imperial HSS Coated in Alloy Box. . OK, I guess the straight key is the way to go, then. 19-1997 . 4. Below is a technical reference chart. LKeithR. Gib Head Keys. English Standard Keyway and Key Sizes Shaft Diameter (in) Keyway (in)* Key (in) From To Width (W) Depth (T 1) Width (W) Depth (T) 5/16 7/16 3/32 3/64 3/32 3/32 1/2 9/16 1/8 1/16 1/8 1/8Woodruff Keys. ApplicationsExtremely versatile profile milling cutters. Metric External Table Chart Thread Designations Sizes M 1. The whole system is called a keyed joint. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. This is because even a very small deviation from the size does not combine with the hub. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. Keyway Dimensions. Woodruff Key for Summit Pro LS Crankshaft, Forward Position, Short Key. A4 stainless steel are also available to order. 6 6. I do not know if the #6 is a standard key or one with the extended ends making it a Hi Pro style. Shaft with Two Keyways Torque Applied Deformation and Stress Equations and Calculator. DFARS Compliance. Woodruff Keyseats KEY SEAT. Diameter < Shaft diameter d_1. METRIC HSS SINGLE WOODRUFF CUTTERS. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k keyWoodruff ansi fasteners nominal Metric key keyway. Should I try to fit key with epoxy, JB Weld or something or leave as is and set timing. Machine keys – also called shaft keys or key seats - are removable machine elements installed between shaft key seats and hub keyways to transmit torque in power transmission assemblies. 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. stocks DIN 6888 Metric Woodruff Keys in carbon steel. zero offset, . 937221 key is a Woodruff 6 and the size is 5/32" x 5/8". These sizes cater to different shaft. Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k key. 6mm. pdf. Carbide Staggered-Tooth Keyseat End Mills. All sizes are in inch units. Woodruff eliminates the milling around the shaft shoulder where concentricity and stress concentration can be affected. 2 Woodruff Key Size Table Chart ANSI B17. Gates belts, hoses, and applications: standard & non-standard shaft keyDifferent size of keys stock photo Shaft taperedAllen. 1 - 1972Woodruff Keys Woodruff Keys are stocked as standard in 45+ key steel, with a minimum tensile strength of 60Kg/mm². Custom-Made Woodruff Keys We are also a UK manufacturer of custom-made and non. Delivered as soon as Next Business Day* Hassle Free Guarantee Learn MoreDespite of this any liability for conversions and results is excluded. 5. The keyseat is cut into the shaft and the key goes into the keyseat, between both parts forming a secure bond. Choose from our selection of rectangle keys, including over 950 products in a wide range of styles and sizes. Also known as half moon keys. 015625 less than 1/4 =. Woodruff key slot Woodruff key sizes are designated by a code number in which the last two digits indicate the diameter of the key in eights of an inch, and the digits preceding the last two digits give the width of the key would be 4/8 or ½ inch in diameter and 2/32 or 1/16 inch wide, while a number 1012 Woodruff key would be 12/8 or 1 ½. Woodruff keys work well near shaft shoulders and on tapered shafts. Keyway standard chart metric broach pdf charts broaches stdKeyway broach 1/16 to 1-1/2 inch, 2. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. 800-243-0986 (US) or 203-775-4877 (INTL) Live chat; Request a Catalog;. some of the special types of keys are given below : Woodruff key. Manufacturing will be based upon DIN 6885 - T1. Key Stock is cold drawn to exacting tolerances with sharp corners, perpendicular and parallel sides, and smooth, bright surface finishes. Gib Head Keys. The diаmeter оf the сutter vаries frоm 10. MSC# 67988287. They mill precise notches in rotary shafts to fit machine keys and can also be used for slot milling. Also known as half moon keys. These simple pieces of metal connect shafts to rotating components to transmit torque while ensuring that the components cannot move relative to each other. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. Woodruff keys are semicircular, fitting partly into a circular segment keyway with the remainder fitting into a longitudinal slot keyway in the mating part. The key and key seat cross section are ISO standardized. (dimensions. 25T. Size range – woodruff keys woodruff keys, din 6888 (metric) width ‘w’ height ‘h’ length ‘l’ diameter key no (d2 x 2) 1. 8 6 6 23 30 8 3. txt) or read online for free. $6. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. ANSI B17. The Hillman Woodruff Key is a semi-circular keys that is commonly used for mechanical applications. 7x10 2. ANSI Standard Woodruff Key Size Table Chart ANSI B17. The inch and metric dimensions here correspond to common values. 11058 Metric Woodruff Key 4. WOODRUFF KEYS WITHOUT PINS. Fax: 1-716-625-1312. Bespoke Machined & Turned Parts - Global Sourcing Specialist. 1 - 1972 # Tolerance each on T1 and T2 (1" -14") is - . 9 20 12 76 86. 4L/454 Crankshaft Woodruff Keys. Woodruff Keyseat cutters are designed for cutting keyways and keyseats as well as performing general purpose milling operations. Radius bottom woodruff keys are half-circle shapes. Set includes sizes in the chart below. Semi. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. b x h1 x D. 2143". The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94. Loading Estimated Ship Date: Today. 728 in. 3 Vehicles. The shaft keyway is designed with a semicircular gap to fit the key in the Shaft. Loading Estimated Ship Date: Today. ANSI woodruff size charts express measurements in inches and nominal key sizes with higher. Keyway metricStandard woodruff keys Standard woodruff keysKey steel metric rectangular keys machine chart iso standard flat. All the sizes you need in one convenient kit!. Keys and keyways secure the hub and shaft to prevent relative movement between a power transmitting shaft and an attached component. 750 in. While this is possible and may save on up-front tooling costs, the results are not optimal. 010. Woodruff key: [noun] a shaft key made in the form of a segment of a disk and used with shafts not more than 2¹/₂ inches in diameter. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. 03 Finished Straight Bores For Standard Finished Straight Bores AGMA Class 1 Clearance Fit For Standard AGMA Interference Fit Nominal Nominal Shaft Bore Dia. This type of key is used in areas where frequent removal of the key is necessary. Big. Save 5% with voucher. 7. Woodruff Key Seat Cutters Solid Carbide Diamond Like Coated. Order 839048 Pioneer Ford 302 Woodruff Crankshaft Key - Size 3/16" x 1 13/32" at CNC-Motorsports. 3 Preferred length and weight of keys - Preferred length and weight of keys is given in Table 4. OK, I guess the straight key is the way to go, then. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. SHAFT KEY ABOVE SHAFT KEYSEAT. The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94. 010" Woodruff Keys Woodruff Keys are stocked as standard in 45+ key steel, with a minimum tensile strength of 60Kg/mm². 1) The woodruff key can be used on the tapered shaft because it can align by slight rotation in the seat. Woodruff keys work well near shaft shoulders and on tapered shafts. Made from M2 HSS ALL 12MM SHANKS. 4660 or click here to contact us. Parallel Metric Key Sizes Per BS 4235-1:1972: Specification for metric keys and keyways – Parallel and taper keys. That Woodruff key fits many ATV's. Best Match Show Filters. Lid Chart. 5 2. They are semi-circular, and fit into a Keyway shaped as a circular-segment in the shaft and a rectangular slot in the mating part. Nom. Stay In The Know - Sign up for the latest info and our free magazine. Bookmark this page [PRICE] | CAREERS. O. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. 1/8 WOODRUFF KEY Carbon Steel BS46 609 Woodruff Keys Woodruff Keys, BS46 Part 1 1958, Carbon Steel, Whitney & SAE Std 16, BS 1958 ASME Std 609, Woodruff Key Assortments AvailableParallel Metric Keys and Keyway Dimensions - Roy Mech. Next, align the top, flat portion of the woodruff key so that it is parallel with the host shaft. Key Size Designation: Woodruff 3 MRC: A measurement from the bottom to the top of a key,in distinction from depth. 0303. The extended ends prevent the key from trying to rotate when installing. FREE delivery Wed, 4 Oct on your first eligible order to. Some machinists use keyseat cutters to machine slots greater than their cutter width. 2-1967) appears to say that the depth of the keyseat from the edge of the opening is 0. OK, I guess the straight key is the way to go, then. The slot in my crankshaft is worn and the woodruff key is loose. C = circ. vn compilation. 000mm. 7mm 3mm x 3. . Milling Cutter, 4mm Woodruff Key Seat Cutter, Durable Practical High Speed Steel for Steel Aluminum: Amazon. 000/+. Side View. 1. These sizes cater to different shaft. The woodruff key is a shaft key made in the form of a segment of a disk and used with shafts not more than 2¹/₂ inches in diameter. Equals Shaft Bore Keyway Keyway Diameter Nominal Shaft Bore Keyway KeywayWoodruff Key for Summit Pro LS Crankshaft, Forward Position, Short Key. Shaft Keys Types and Their Design from Sweet woodruff is exceptionally easy to grow and readily adapts to a wide range of soil and moisture. Woodruff key is a flat semi-circular or half-moon-shaped disk with a uniform thickness, which directly fits into the semi-circular recess of the shaft. Keyway Sizing Chart - Free download as PDF File (. Standard External Metric Thread and Fastener Sizes M 0. Alloy Woodruff keys normally are made from SAE-8630 steel. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. --keyway dimensionsKeyway chart diagram hallite. Woodruff Keys. Desired Slot Size.