thick x 1 in. Choose from imperial or metric. They have the advantage that their keyways may be drilled and reamed after the mating parts have been assembled. Woodruff Key. Body: Steel C45 Carbon. 9. The number of employee benefits point solutions has grown rapidly in recent years with an increased focus on mental health and well-being. They are also often used on tapered shafts. thick x 5/8 in. In front perspective, it’s a portion of a cylindrical disc with a segmental cross-section. Je a small, half-moon-shaped metal key to zapadá do slot on the crankshaft and aligns with a corresponding slot on the timing gear or pulley. Our Woodruff Keys Are For Locking Wheels, Pulleys, etc. Splines:- Used in automobile transmission and sliding gear transmission, where a large force is transmitted in proportion to the size of the shaft. Woodruff keyseat cutters are circular cutting tools made of high-speed steel, used by machinists for cutting seating in shafts for woodruff keys and, in some cases, keyways in fitting parts. Because the keyway and key are both slightly tapered, the key can. It represents manufacturing practices for sizes and types from 1/16 in. Limited Lifetime Warranty. When installed, the long, flat side of the woodruff key shaft protrudes from the receiving shaft. Also known as half moon keys. 6 mm - Stainless 303-304 - 18-8 - A2 - ExactKey (Pack of 1) $6. 28 ERA and a 0. 1-1/4". 3/8". Performance Tool Woodruff Key - W5341. Specification: Item Type:Woodruff Key . Use them in light duty applications to connect gears and other components to shafts. Firstly, Woodruff keys provide a compact and efficient means of connecting rotating components to shafts without the need for additional fasteners or complex mechanisms. Effective cost controls create significant opportunities for a business. The advantage of the design of the key is that there are relative axial motions possible between the. 1. 6. These keys come in many of sizes be it metric or imperial profiles. It is impossible for them to roll over in the seat, which in turn helps guide the harmonic balancer. Spread the love The advantages of Woodruff Keys over Parallel Keys are: They eliminate the milling near shaft shoulders which reduces stress concentrations and makes it easier to maintain circularity constraints . L. Woodruff trick is a semi-circular disc & & suits advertisements recess in the shaft, which is machined by Woodruffs keyway cutter. 1 - 18 of 18 results for Woodruff Key Compare Refine. RE: Woodruff Key - 91? Flexmaster (Mechanical) (OP) 4 Feb 03 16:53. Saddle Key: Fig 2: Saddle keyNationally Ranked University. SAP S/4HANA enables the. asvab 18th edition scott a. The best place to start is assessing what your organization and team need to be successful. Item # PPC302-080. The projecting part of the woodruff key fits. of connecting components to a shaft, allowing for and reassembly without damaging. The seller of top 1 product has received honest feedback from 650 consumers with an average rating of 4. The FIDO2 authentication process eliminates the traditional threats that come with using a login username and password, replacing it. 11, is a segment of a circular disc and fits into a circular recess in the shaft which is machined by a Woodruff keyway cutter. Woodruff key is a semi-circular disc & fits into circulars recess in the shaft, which is machined by Woodruffs keyway cutter. The shaft may be parallel or tapered, showing the method of dimensioning shafts for the Woodruff key where the depths of the recess from the outsides of the shaft are given, in addition to Splined Shafts from Grob, Inc. Firstly, Woodruff keys provide a compact and efficient means of connecting rotating components to shafts without the need for additional fasteners or complex mechanisms. A more precise fit of the key and keyway also reduces play and stress concentrations and improves the reliability of the key. 8373 posts · Joined 2006. covering 66 listings. The keyway in the shaft is a semi-circular pocket, the mating part, a longitudinal slot. The woodruff. Woodruff key is a semi-circular disc & fits into circulars recess in the shaft, which is machined by Woodruffs keyway cutter. Woodruff Machine Key 1/4" x 2-1/8" Alloy Steel Plain Key Number: 817-1. Firstly, Woodruff keys provide a compact and efficient means of connecting rotating components to shafts without the need for additional fasteners or complex mechanisms. Explanation: The woodruff key is an easily adjustable key. Woodruff Key Kit, 135 Pcs Woodruff Key,Flywheel Pulley Crank Way Key Assortment Kit for Multiple Purpose, 21 Kinds, Screw, Coveralls. Study Resources. 1) The tolerance zone for hub keyway width b for parallel keys with normal fit is ISO JS9 and with close fit ISO P9. Saddle: Basically, there are two types of saddle keys: the flat saddle key and the hollow saddle key. Firstly, Woodruff keys provide a compact and efficient means of connecting rotating components to shafts without the need for additional fasteners or complex mechanisms. 5 Woodruff Key10PCS 4x13x5 Woodruff Key5PCS 4x16x6. Using Woodruff keys offers several advantages in various applications. They are installed deep in a shaft and firmly embedded. Shop online for woodruff key stocks. The Engine Crankshaft Woodruff Key is a small but crucial component in an engine’s crankshaft assembly. Sweet woodruff can cause headaches, dizziness, blackouts, and possibly liver damage when used long-term or in large amounts. Performance Tool W5341 80pc Woodruff Key Assortment Metric #1 Best Seller . However, due to. It's employed in positive drive applications and can take various forms based on its shape and design, including rectangular sunk keys, square sunk keys, parallel sunk keys, gib-head keys, feather keys, and Woodruff keys. Woodruff keys work well near shaft shoulders and on tapered shafts. Read More About: Woodruff Key : Types | Why Used | Advantages and Disadvantages. Tokamak Energy and Khalifa University to present key advantages of fusion technologies in Abu Dhabi ahead of COP28 - Tokamak EnergyIt fits in a half-moon shaped slot, in a shaft, leaving the flat side of the tab exposed. Uses. Our Woodruff Keys are available in Carbon Steel or Stainless Steel ask our sales office for a quote or login with your B2B account today to save upto an additional 5% order value dependant. They are critical to the transportation industry. Woodruff keys are commonly used in machine tools and, for example, between the flywheel and the crankshaft of a small internal-combustion. Woodruff keys are semicircular shaped, such that, when installed, leave a protruding tab. Shop by DepartmentSweet Woodruff Flower Meaning & Symbolism. The advantages of Woodruff Keys over Parallel Keys are: They eliminate the milling near shaft shoulders which reduces stress concentrations and makes it easier to. These woodruff keys are part of the Hillman Deep Drawer program. Sunk keys are of several of types such as Woodruff key, Gib head key, Feather key, Parallel sunk key, Square sunk key. Splined shafts offer advantages that keyed shafts are unable to match, and without a major increase in price, too. The feather key, shown below, allow the hub to slide over it (T orF) This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. If knowledge is power, Woodruff is a pretty powerful place. Aurora, CO. A woodruff keys are perfect for high. Material, heat treatment, hardness or finish is not within the scope of this standard. Pry off the pulley. 1. 6 more likely to produce a highly cited paper than a same-gender team of the same size. Cyber 101: Understand the Basics of Cyber Liability Insurance. FAQs about Woodruff Keys. UML is standardized in class diagrams. The per capita income in Woodruff in 2018 was $0, which is low income relative to Arizona and the. Using Woodruff keys offers several advantages in various applications. 7139. A mixed-gender team of six or more researchers was 9. That's on page 952 Table 8, titles Finding. Profile. overall culture is rated C- based on 84 ratings from 9 Woodruff-Sawyer & Co. 【 VERSATILE USE 】: Woodruff Key stocks are commonly used in automotive and machinery applications, making our assortment kit a must-have for any mechanic or DIY enthusiast. The Woodruff Keys is so called because of its manufacturing method. The crescent profile of the key allows it to sit deeper in the shaft, reducing the likelihood of the. values(): print(f) 5 1 2 1 Frequency Tables. Quantity: 80. It is a perfect fragrance for making perfumes. Woodruff keys are used on shafts from ¼” diameter to 2-1/2” diameter. 2. The target of partitions is to place the pivot (any. Thus it works like a safety device. These keys are easy to remove and simple to use. The main advantages of a woodruff key are as follows : 1. What are the advantages of using Woodruff keys? Using Woodruff keys offers several advantages in various applications. My understanding is that one advantage of a Woodruff key is that it avoids a stress concentration in a shaft. Spread the loveWoodruff Keys are an alternative to Parallel Keys. Cyber risk is more prominent than ever—and insuring cyber risk is getting more complex. These woodruff keys are part of the Hillman Deep Drawer program. Standard Steel Specialty is the largest customized Woodruff, HyPro, and NonRok key manufacturer made to your material and print specifications. Woodruff Keys. This key is commonly used in the manufacture of machine tools and automobiles. A data warehouse stores summarized data from multiple sources, such as databases, and employs online analytical processing (OLAP) to analyze data. 1)In the extra depth of the keyway in the shaft increase stress concentration and reduces its strength. In addition, only 45% of 8th-grade students are proficient in math, a key gatekeeper to high school. Its bottom circular part is hammered into the shaft and flat part is fixed into hub. These pockets can be set by a cutter to set the dimensions. 79. We have researched hundreds of brands and picked the top brands of engine woodruff keys, including boeray, Nisorpa, Glarks, Performance Tool, HaSaoMoi. Woodruff keys have many advantages over other types of keys. Fragrance Purpose. Numerous activities and processes are. Judy Woodruff traveled to Wisconsin to see how the state’s sharp political divides are shaping what could be the most important election of 2023. The width to thickness ratio of a key is different. This is one of the biggest e-commerce advantages. Oh well, let me know if this helps. 3/16 in. These type of keys are rarely used because these cannot transmit the high torque. Firstly, Woodruff keys provide a compact and efficient means of connecting rotating components to shafts without the need for additional fasteners or complex mechanisms. 2 a What is the main disadvantage of using a woodruff key on a parallel sided from MECH 2400 at The University of Sydney. See examples of WOODRUFF KEY used in a sentence. A force 2P is acting on the double transverse fillet weld. It is a piece from a cylindrical disc having segmental cross-section in front view as shown in Fig. Add to Cart . Gib Head Sunk Keys #5. Total views 100+ The University of Sydney. 3. A simple mechanical part can reduce manufacturing costs and machine downtime. Add to Cart. My solution was to drill the shaft at the key way position to accommodate a shear bolt. Fig. This half-moon woodruff key has a plain finish and a tensile strength of 72,000 PSI. This key is largely used in machine tool and automobile construction. Here, the different advantages of woodruff key are as follows 1. The advantages of Woodruff keys are as follows :- 1) The woodruff key can be used on the tapered shaft because it can align by slight rotation in the seat. Round Keys The round keys, as shown in Fig. How does SDN support edge computing? A software-defined network can integrate any stretch of cable anywhere in the world into your home network. 4. Woodruff key; Saddle Key. What’s more, the novelty and. All woodruff keys I've ever used had to be ground to fit. This streamlined design allows for easier assembly, disassembly, and maintenance of the machinery or engine. , via a machine’s shaft, a shaft key serves to establish the connection between the pulley, gear, and the shaft. It affects how we think, feel, act, make choices, and relate to others. This streamlined design allows for easier assembly, disassembly, and maintenance of the machinery or engine. Loosen the pulley nut. Woodruff keys are also specified in applications where a milled square key would be cut up to a shoulder on the shaft, so as not to cause a weak point in the stress. Using a Woodruff key in a crankshaft offers several advantages: Secure Connection : The Woodruff key provides a secure and reliable connection between the crankshaft and the. A key is a machine element that is used to join a rotating machine element to a shaft. You Can Diversify Your Portfolio. x 1/4 in. [3] The latter is particularly important for high speed operation. Part #: W5341 Line: PFM. Based on estimated tuition rates over a four-year period, the scholarship is worth $300,000. Disadvantages of woodruff key : The extra depth of keyways in the shaft increases stress. 10 Best Woodruff Keys 2023: My Experience & Review Hi there! My name is Lily Monroe, and. Compare that to the national average of 21. And, for the first time in at least seven years, the undergraduate class also includes three Martin Luther King Jr. Criticality factors will help to do this. One owner 69 Camaro, (yep, bought it new) RS SS Hugger Orange, L88, 4:10's tru-tack posi, ducted hood, Endura, spoilers. 3/16 X 3/4 WOODRUFF KEY Carbon Steel BS46 606 Woodruff Keys Woodruff Keys, BS46 Part 1 1958, Carbon Steel, Whitney & SAE Std 9, BS 1958 ASME Std 606, Woodruff Key Assortments Available. This streamlined design allows for easier assembly, disassembly, and maintenance of the machinery or engine. Woodruff keys eliminate the need to mill holes near shaft shoulders. Shearing of the Woodruff key can result in engine malfunction. The shaft may be parallel or tapered, showing the method of dimensioning shafts for the Woodruff key where the depths of the recess from the outsides of the shaft are given, in addition toSplined Shafts from Grob, Inc. Semicircular Woodruff keys insert into a curved slot in the shaft. x 3 1/2 in. 3017 sales@huyett. The engine woodruff keys are available for purchase. 6 - 10mm x 16mm. Due to the exact. x 3 1/2 in. Arrow functions were introduced in the ES6 version. It is a piece from a cylindrical disc having segmental cross-section in front view. Mar 13, 2015. The main advantage of the Woodruff key is the elimination of milling near shaft shoulders, where stress concentrations, [4] and concentricity would be affected. Available in many different sizes and thicknesses; Conveniently packaged in a variety of piece counts to assist with both small and large projects; Easy to Install. The Engine Crankshaft Woodruff Key is malá, ale zásadní součástka in motoru sestava klikového hřídele. Correct. 7. The thickness of the key is uniform. Increasing Costs and Price Transparency. Dimensions shown are in Inches and mm, if you wish to convert them, please use. Woodruff key are able in accommodating taper in hub keyway. whack the bottom of the key horizontally. Remember, if you encounter Woodruff key shearing in your engine, it is crucial to address problém urychleně zabránit další poškození. Application: Woodruff is commonly used in machine tools, for example, between the flywheel and crankshaft of a small internal combustion engine, where the drive depends largely on the fit between the. The fundamental advantage of woodruff keys is that they do not require machining at the shaft shoulders, which reduces stress concentrations at the shaft's end. The radical increase in the number of people working from home (WFH) during 2020 has been one of the effects of the coronavirus (COVID-19) pandemic [1,2]. Μετάβαση στο περιεχόμενο* The usual form of rectangular sunk key is very likely to turn over in its keyway unless well fitted as its sides. 99 $ 31. which undermines the benefits of Python readability. L. Remember, if you encounter Woodruff key shearing in your engine, it is crucial to address het probleem snel te voorkomen verdere schade. "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. A shaft key is a small metallic component mounted between the shaft and hub to restrict the relative motion. Material:. Set screws and pins can also work as an alternative to the keyed joint. Firstly, Woodruff keys provide a compact and efficient means of connecting rotating components to shafts without the need for additional fasteners or complex mechanisms. See moreEliminates slippage between machine components thereby preventing wear and the. Woodruff Key. The tolerance zone for shaft keyway width b with normal fit is ISO N9 and with close fit ISO P9. Did you help? Yes, you helped my sanity. Managing social isolation, loneliness, stress, depression, and mood through medical and self-care is key to healthy aging. Length. thick x 1-1/8 in. Tax benefits Although some corporations, like C corporations (C-corps), are subject to double taxation, other corporation structures, such as S corporations (S-corps), may give you tax benefits. All our Woodruff Keys are constructed of high-quality materials for long-lasting durability. Easy to Install. Sweet woodruff can also be taken to strengthen weak veins as well as to enhance normal blood circulation. These woodruff keys are part of the Hillman Deep Drawer program. The key becomes finding the right solution to address the evolving needs of your workforce. 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. 2143". I heard about this happening from other folks, but this is the first time I ran into one that was stuck so bad. Lower portion of the key fits into the circular keyway of the shaft. 5-7. Ecommerce Advantage #11: Able to Process a High Number of Orders. The primary function of keys and keyways. QuickSort is a sorting algorithm based on the Divide and Conquer algorithm that picks an element as a pivot and partitions the given array around the picked pivot by placing the pivot in its correct position in the sorted array. We offer durable quality products at affordable prices and free shipping on orders over $99. These semicircular keys when set in place leave a flat end protruding. Woodruff Key Set, Metal Woodruff Keys Assortment Kit, Different Sizes Fasteners for Mechanical Industry 80-Piece $12. A Woodruff key has the advantage that it will turn itself in its circular recess to accommodate any taper in the mating hub on assembly; for this reason it cannot be used as a feather key, since it would jam. A large repository designed to capture and store structured, semi-structured, and unstructured raw data. Woodruff key is a type of sunk key. Woodruff Keys manufacturers, service companies and distributors are listed in this trusted and comprehensive vertical portal. MECH. At Grob, we manufacture both industry standard spline shafts and custom spline shafts . Once installed, the gear or other machining component with the proper. Woodruff. Type. Attributes. One of their key advantages over the Diamondbacks was to establish their rotation for this series. The woodruff key fits in a half-moon shaped slot, in a shaft, leaving the flat side of the tab exposed. Using Woodruff keys offers several advantages in various applications. Also suitable for a broad variety of industrial and commercial uses. A woodruff key is capable of tilting in a recess milled out in the shaft by a cutter having the same curvature as the disc from which the key is made. Leg of weld is h and length l. Material, heat treatment, hardness or finish is not within the scope of this standard. The main advantage of the Woodruff key is the elimination of milling near shaft shoulders, where stress concentrations and concentricity would be affected. The advantages and limitations of traditional and emerging ToM methodologies are discussed with the intent of advancing the understanding of ToM in socially mediated situations. woodruff key is capable of tilting in a recess milled out in the shaft by a cutter having the same curvature as the disc from which the key is made. if you will notice the geometry on most chisels use the short side against the shaft and knock the key downward. 2 a what is the main disadvantage of using a woodruff. Turned And Machined Parts. This streamlined design allows for easier assembly, disassembly, and maintenance of the machinery or engine. Shaft diameter is 3/4". Hi-pro keys are similar to Woodruff keys, but lock into place. Rectangular sunk key. Type. Woodruff keys are relatively short and cannot carry the same load as longer keys, and hence are used mostly in light-duty applications and mounting taper-bored components onto tapered shaft ends. Distinct Advantages:Can automatically adapt to the slope requirement. 01384 634461. The key seat in the crank seems to be a few tenths under 0. Determine the shear stress in a plane inclined at θ with horizontal. Catalogs & Resources. 7 woodruff keys? I sheared off the one I had cut down for the. 2. zThe key width is nominally ¼ of the shaft diameter. x 1/4 in. works by fitting into a keyway on a shaft and component, creating. One of the primary decisions in selecting a primary key is whether to use a UUID or a sequential ID. Solid fuel is the various forms of solid material that can be burnt to release energy, providing heat and light through the process of c. No reviews. AliasesA Woodruff key is a unique type of key that has a semi-circular shape. Our Woodruff Keys are available in Carbon Steel or Stainless Steel ask our sales office for a quote or login with your B2B account today to save upto an additional 5% order value dependant. Woodruff keys are semicircular, such that, when installed, they leave a protruding flat end. The woodruff key fits in a half-moon shaped slot, in a shaft, leaving the flat side of the tab exposed. 4. Features & Benefits. The main advantages of a woodruff key are as follows : 1. Standard Woodruff key Profiles for shafts with Woodruff keyways. The Woodruff key is #STD 580025. . The advantage of a Woodruff Key is that once the key is properly installed, it is captive and cannot walk itself out of the shaft. spladle160 ArboristSite Lurker. . Indexing in Databases – Set 1. ACID properties are the four key characteristics that define the reliability and consistency of a transaction in a Database. The main advantage of a Woodruff key is in its avoidance of the milling of a keyway near the shaft shoulders, where stress concentration already exists. May 2, 2023. $31. Free delivery on eligible orders of £20 or more. These Woodruff keys can automatically adapt to the slope requirement. It consists of a semicircular key seat on the shaft surface which holds the key. Advantages of Woodruff Keys Woodruff key is a easily adjustable key. Woodruff Key The woodruff key is an easily adjustable key. You'll need to be far more specific. Briggs and Stratton use a straight aluminum key in a tapered shaft on the flywheel. Global Reach. Using Woodruff keys offers several advantages in various applications. Application Programming Interface (API), often referred to as web API, is an interface that allows two systems to communicate with each other (share data and access resources). Reps and warranties insurance is essentially breach of contract cover designed to enhance or replace the indemnification given by the seller to the buyer. This could include information about the size, material, and compatibility of the keys, as well as any other relevant details that might be important to. By connecting the gear and pulley with a shaft key, both components effectively merge, ensuring that when one part rotates, the other rotates concurrently. We even have a 383-piece Woodruff key set with over a dozen different sized keys. 【 WIDE RANGE OF SIZES 】: Our Woodruff key stock assortment kit includes sizes ranging from 8mm to 30mm, making it compatible with a. In case of overloading, it takes up the load and fails to prevent the main parts from damage. Using Woodruff keys offers several advantages in various applications. A feather key is a parallel key, which is fixed to the shaft or to the hub and which permits relative axial. 3mm X 17mm. Kennedy Key-The Kennedy key is made up of two square keys. 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. Have a couple of questions: Why is there a Woodruff key instead of an ordinary key? and: Why is the key too wide for the pulley but fits fine in the shaft? Thanks in advance and. Emory’s thriving community of researchers, scholars, and clinicians makes an impact in Atlanta and across the globe. Woodruff Key 2. We recommends Top-Rated Automotive Replacement Engine Woodruff Keys Deals You Can Buy Online for September 2023 on Amazon, As Tested by CherryPicks Editors and analyzed 1,294 customer reviews to Automotive products. In Stock. 2 16 45 12 19 - + n 19 n 25 28 - 0. 3,283. Mfr. 2. thick x 1 in. Size. This streamlined design allows for easier assembly, disassembly, and maintenance of the machinery or engine. It can tilt and align itself according to the shaft The Woodruff key has some advantages over other types of keys. Technifast provide a varied range of keys including round end, square end and one round/one square end parallel keys (also known as feather keys), woodruff keys and gib head keys which are available in metric and inch sizes. Woodruff key differs in shape from other keys. Using Woodruff keys offers several advantages in various applications. Keys are inserted inside the shaft and hub keyway to ensure the working of the complete system. Advantage of woodruff key. on Shafts & Similar Assemblies. rkmechanical's page. Woodruff keys. . B-tree provides. Woodruff keys are semi-circular discs used to connect machine parts to rotating shafts and spindles. 236) In. CAREFUL NOT TO GO INTO THE CRANK. This key is largely used in Some of the advantages of woodruff keys are as follows, Woodruff keys are used to reduces the stress concentration and improves the safety of the shaft. 17. For an account call. These results highlight key limitations in the use of existing “third-person” paradigms in the. Available to incoming Emory College students. It is an easily adjustable key. Must Read: The Splines Key; Advantages of Keys-The main benefits of keys are: It can be easily fitted and removed. 7 Woodruff Key10PCS 3x13x5 Woodruff Key10PCS 3x16x6. 4. Woodruff can be dried and stored in clothing, linens and bedding in order to wade off insects and moths. This streamlined design allows for easier assembly, disassembly, and maintenance of the machinery or engine. Several database fields are used to generate indexes. Advantage of saddle key Since keyway is to be made only in the hub hence its cost is. This streamlined design allows for easier assembly, disassembly, and maintenance of the machinery or engine. 3/8". Our Woodruff Keys are available in Carbon Steel or Stainless Steel ask our sales office for a quote or login with your B2B account today to save upto an additional 5% order value dependant. The key is in the shape of a section of a circle. Advantages of woodruff key : It can be used on the tapered shaft because it can align by slight rotation in the seat. Woodruff key is a sunk key in the form of almost semi circular disc of uniform thickness. Advantages of Woodruff key. Shearing of the Woodruff key can result in engine malfunction. Pages 10. L. Step 2: Identify the keyway: Locate the keyway on the crankshaft. However, they are difficult to. Material. Sold in pack of ten. 1250. Do whatever you can to stop the pulley from turning, then use a tool such as a socket or ring spanner on the nut until the pulley can be removed. 2 among master's programs. Imperial - 1/6" x 1/4" - 3/4" x 3. 6. This key has flat bottom. Standard Woodruff key Profiles for shafts with Woodruff keyways. Loose crankshaft woodruff key. This streamlined design allows for easier assembly, disassembly, and maintenance of the machinery or engine. The woodruff key is in a piece from the cylindrical disc as shown in the Figure, and its main advantage is that it can be adjustable, tilt in the keyway or keyseat. News and World Report, and our Nell Hodgson Woodruff School of Nursing is ranked No. 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. Parallel Keys zThe key seats in the shaft and the hub so that exactly ½ of the key bears on thePart of the sunk key resides within the rotating shaft, while the rest fits into the hub or boss.