, the THINBIT GROOVE ‘N TURN line includes Dovetail grooving inserts and Static O-Ring Grooves. In this video workshop, you’ll learn how to: Use a dovetail plane to cut tapered sliding dovetails Use tongue-and-groove planes and beading planes for backboards Cut mortise-and-tenon joints by hand Use molding planes to. Commonly used on rimfire rifles and air guns, the dovetail mounting system features two grooves that run parallel to the bore. 6Fire. Tongue-and-groove joints are popular for making doors, flooring, and architectural paneling. Re: Dovetail Grooves with Part Design Workbench. The inserts are available in submicron. long, and bases to 96 in. Other edge styles including micro-bevel t&g, butt joint or shiplap are available upon request. long, and bases to 96 in. 6 μm Ra)Dovetail joinery is a type of tongue-and-groove (or tail-and-pin) box joint. For Depths of Cut 2-1/2 to 3 times groove width. Concerning this, geometry, material selection, and stress calculation need to perform at the predesign phase. 4 mm) square that is translated using a precision M3 x 0. Thinbit, manufactured by Kaiser Tool, has expanded its Groove ’N Turn line of dovetail grooving inserts, which are used to machine O-ring dovetail grooves with 66-degree undercut angles. Calculated Results. GROOVE 'N TURN® dovetail grooving inserts are used to machine O-ring dovetail grooves with 66° undercut angles. Moderate force gaskets come without a cord unless specified otherwise. Perhaps only one side of the dovetail requires accuracy. Although it mills the same 14 degree, 1/2" profile as a standard dovetail bit, its unique design automatically rounds over the sharp top shoulders creating incredibly clean dovetail grooves and virtually eliminating the need for sanding. R L 66° R1 Mean Groove Diameter Coincides With Mean O-ring Diameter. 4-10 Parker Hannifi n Corporation • O-Ring Division 2360 Palumbo Drive, Lexington, KY 40509 Phone: (859) 269-2351 † Fax: (859) 335-5128 Static O-Ring Sealing Parker O. Gland Design for Static Application for O-rings with Radial Squeeze Industrial Radial Glands INCHES. If you're talking turning ''true '' dovetail grooves i. May 1, 2017. Manufacturers such as MGW make universal or model-specific sight tools. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. . Dovetail interlock design Technical Bulletin Dovetail interlock design Large sealing areas used in transmission and. The groove can be both a typical "square" configuration (as shown on the image below), or as half dovetail groove. For technical assistance with any of. By Mike Farrington #295-MAR/APR 2022 Issue. Hydrogenated Nitrile HNBR O-Rings Material. DMS-1684 NC. Tongue-and-groove joints are popular for making doors, flooring, and architectural paneling. It provides axial compression (face type) groove dimensions for aerospace metric O-ring sizes specified in MA2010. 4c, dovetail grooves with one side cut off were located at positions 9 mm left and right from the center of the contact surface. And with just a few simple tips, you’ll be routing perfect joints in no time. O-Ring Groove design plays an important part in how an o-ring seals. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. Take the dovetail guide and align it to the groove on the top of the base. Ph: 859-269-2351 Fax: 859-335-5128. Dividers: You can also use a compass, ruler, or calipers too. 3. The correct O-ring groove dimensions and shape will ensure complete compression between the track and the mating surfaces. After the first tail has been cut, turn the stock 180 degrees and place the opposite side into the jig. A few of the most commonplace uses for a dovetail joint (and therefore a dovetail cutter) include: • Furniture, such as drawers, cabinets, shelves, etc. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent. Select the type of O-ring groove - piston, rod, face seal or trapped seal. In addition to a 5 ⁄ 8" guide bushing, you'll need a 1 ⁄ 4" spiral downcut bit for clean cuts (a 1 ⁄ 4" straight bit will also work) and a 1 ⁄ 2" dovetail bit. I think the choice is more manufacturing capability or design preference than case/application driven. Gland Width (G) Gland Depth (L) RadiusWith a miter joint, each piece of wood is cut at a 45-degree angle. Find AS568 o-ring standard sizes by cross section, inside diameter and outside diameter in our o-ring size chart and separate o-ring tolerance chart. The Picatinny design consists of a strip undercut to form a hexagonal cross-section with crosswise. Press-In-Place Seal – one flat surface has a groove design cut into it to retain the O-ring in the gland; Piston Seal – split ring in a reciprocating engine to prevent fluid from. Modifications to. #Dovetail #dovetailjoints #metalprojectFollow me on Instagram: Joints are a traditional slide mechanism th. MISUMI USA has all of your Manual Z-Axis Stages needs covered, with over 3. X-Ring and High Performance O-Ring. • Attaching turbine blades to jet engine. This design is suitable for static sealing. PIP design reduces installation strain or fatigue in high-volume applications. Chuo Precision Industrial. 030, . The top is wide and the bottom is smaller, you can easily put the dumbbell back on the dumbbell base. O-Ring inner diameter stretch, outer diameter squeeze. Reset Custom Tolerance. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. The angle of orientation usually lies between 60° and 90°. Face seal o-rings pop out easily, yeah. 442 *. The Dovetail Gadgets are a powerful addition to the Vcarve Pro and Aspire software. 00. This o-ring gland design guide is intended for use in specifying o-ring and gland dimensions for static applications Dichtomatik North America. 5-inch capacity and the two-way clamping force you get from the X-Pad (and its ability to hold round stock) has our woodworkers really excited. ** These sizes come with a solid elastomer. The result will be that the ring will extrude itself under that temperature cycle. For dovetail grooves, match the centerline of the groove with the centerline of the O-ring. Encourages the shielding performance illustrated in the Shielding Quality data sheets. 2. This is beneficial for special applications where the O-ring has to be fixed by the groove e. Learn More. 00E-0,6), f. 쿼드링은 왕복운동용,회전용,고정용등에. The angled groove walls are an effective way to retain the seal, because the walls essentially pinch the seal, holding it in position. O-Ring Groove design plays an important part in how an o-ring seals. Many resources are available at your fingertips so don’t miss the opportunity to make the most of them!The dovetail grooving inserts are intended to machine O-ring dovetail grooves with 66-degree undercut angles. This design allows the interlocking strength of a dovetail. Dovetail joints are beautiful to look at and strong, plus they are the most difficult joints to execute. oesmailbox@parker. This joint is best achieved in a hand-cut. Dovetail Gadgets. For dovetail grooves, match the centerline of the groove with the centerline of the O-ring. Dovetail groove cutters are the tool needed to cut a dovetailed groove, recommended for many of Spira’s groove mounted gaskets. Glide the router along the marked section of the wood. The smaller the angle, the more precise the fit must be. The two horizontal axes are the easiest so let's begin there. , (800). This dovetail o-ring groove design guide will help you find the right dovetail o. Selected Diameter: Displays the diameter of the selected cylindrical face, or No selected diameter. Dovetail grooving inserts are used to machine O-ring dovetail grooves with 66° undercut angles. Round nose bits, sometimes referred to as core-box bits, can be used to cut shallow, rounded-bottom grooves of various depths, but to be used properly, the bit should be plunged until the profile cut into the wood creates a full 180-degree arc. 00E-0,6), f. Edit the slave part within the. The utility model discloses a kind of ruggedized constructions suitable for dovetail groove, including first substrate and the second substrate, the bottom of the first substrate is provided with tenon, dovetail groove corresponding with tenon is provided in the second substrate, third sliding slot is provided at the center of the dovetail groove inner bottom. In large male gland assemblies, it may be desirable to use an O-ring one size smaller than indicated in the design chart. Axial dovetail fixings are usu-ally employed in the design of the large civil fan blades, and for the front stage of either a military or commercial core compressor where sufficient edge-wise bending strength is required to meet demanding bird impact or foreign ob-ject damage. Dovetailed grooves are recommended since they hold the gaskets in place and allow the gaskets to expand laterally as they are deflected without constraining the sides. 'Dove Tail' styled O-ring grooves are commonly used to hold an O-ring in place during assembly and maintenance. John R. Dovetail groove is used to put the O-ring or elastomer dovetail seal during installation. D. The spiral is tin plated for superior conductivity and shielding properties. Create dovetail grooves that allow O-rings to flex without falling out of place. The light blue faces in the following image represent a groove. Select a standard, groove type, and available groove size from the lists on the top left of the tab. Expressing these rules as formulas: y = b - D ( 1 + cot 1/2 α ) Home. This design is beneficial when the seal is opened and closed during use. f. In radial grooving, the groove is cut perpendicular to the axis of the workpiece, effectively radiating out from the center of a cylindrical part. (Latch, fasteners, etc) Any more, and fitup became problematic. 805 . 11:29. If you are looking for a comprehensive guide on O-Ring design, selection, and application, you should download the Parker O-Ring Handbook (ORD 5700) pdf. Downtime is lost revenue, and with the incorporation of the EZ-Lok Seal, downtime can be significantly reduced compared to the time taken to install traditional seals. The wedge-shaped projections offer a better, tighter fit due to the increased friction. based on the final ideal dovetail groove parameter of Ansoft calculating gained, enabling circular diameter in armature stamping respectively is φ A, outside diameter are φ b, and are justified respectively with φ a, φ b. Markez® O-Rings FFKM. Browse design considerations and recommendations for. 24° Per Side, 48° Included. Inserts can groove, turn/bore and generate profiles. But an insufficient radius will potentially cause damage to the O-ring during installation, while an excessive radius may result in extrusion failure. Two-level optimization predicts designs with the least contact pressure and stress. It is sometimes necessary to mount an O-ring in a face type groove in such a way that it. 2016. . DOVETAIL O-RING GROOVE DESIGN. 010" corner radius, Harvey Tool's expansive offering of solid carbide, fully stocked Dovetail Cutters is the industry's best. If you’re dovetailing stock less than 1⁄4-in. In some cases, the Babbitt was statically poured into the. . g. Dovetail o-ring groove design is used to prevent o-rings from falling out of the gland. It’s alarming to see some of the home-brewed. To make this joint, you'll rout the dovetail slot first, then cut and size the dovetail to fit. Dovetail joinery is a type of tongue-and-groove (or tail-and-pin) box joint. This can make them challenging designs when it comes to overfill. Try not to get any glue on the edges of the top, as it should float freely in its groove. A feature appears in the FeatureManager design tree with a name that matches the Description. The wall inclination creates a groove with a trapezium cross-section, whose main purpose is to hold the O-ring in during installation and maintenance. X-Rings are designed for improved slow dynamic application performance. AIR1108. The online O-Ring Calculator offers engineers and professionals a quick and easy way to calculate O-Ring dimensions and the appropriate housing layout in accordance with the international O-Ring standard ISO 3601. 6Fire. Baker, P. The slight. 쿼드링. Dovetailed grooves are recommended since they hold the gaskets in place and allow the gaskets to expand laterally as they are deflected without constraining the sides. Center the jig appropriately and cut the tails, again following the instructions that accompany your dovetail jig). The contact surface between the wear-resistant ceramic sheet and the vulcanized rubber in the rubber coating of the ceramic drum adopts a good "dovetail groove" design, which makes the contact. In dovetail drawer joints, the tongues look like actual. . MICROJIG has accomplished this with their MATCHFIT Dovetail Clamp AP. Design Charts II & III (see pp 7-8) provide dimensional recommendations for full and half-dovetail vacuum seal O-ring grooves. The insert design is optimized for strength by utilizing an insert pair to generate the groove form. [Features] · A Z-axis stage that uses a dovetail groove (D-T type), V groove, and cross roller (V-CR type) for the travel guide. O-Ring groove design +. Situations causing overfill may be thermal expansion resulting from high heat, or O-ring swell due to the seal material absorbing some of the fluid. In the dovetail groove design, radius r1 never contacts the O-ring – so it does not affect the seal. com Dove Tail Design Guide. * Please note that some AS568-0XX O-rings have atypical cross. Dovetail joints require zero mechanical fasteners, making them more attractive to the traditionalist. Be they circular DT grooves on the face of a part or around the periphery, in over 40 years machining n metal chewing etc etc , I doubt I've made 100 in total - and 60 of those were on one job, and a. 5M-1994)dimensioning method (again, linear, not. Making a dovetail oring groove is an annoying task on a good day at normal size scales. O-ring groove design is a key consideration in the o-ring selection process. The unique design of the 9Q enables it to be installed anywhere along the slot and assembled in place without taking off the actuator end-cap. X-Rings are designed for improved slow dynamic application performance. Furthermore, in the multiple dovetail structures shown in Fig. 2. Learn More > Contact. When you pick up the dumbbell, it will not be dragged/carried together. Narrower groove for sealing vacuum or gas. As shown in above figure, an O-ring also gets compressed axially in a dovetail groove. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. World Class; Certifications; Contact Us; Call Us: Seal & Design Canada: Toronto, Ontario (416) 741-7005 Toll Free: 1-866-242-3770 Headquarters: Clarence, NY (716) 759-3344 Higbee Division: Syracuse, NYIn the dovetail groove design, radius r1 never contacts the O-ring – so it does not affect the seal. Instead of box-shaped projections, its profile has more of a wedge shape resembling a dove’s tail. World Class; Certifications; Contact Us; Call Us: Seal & Design Canada: Toronto, Ontario (416) 741-7005 Toll Free: 1-866-242-3770 Headquarters: Clarence, NY (716) 759-3344 Higbee Division: Syracuse, NYO-Ring Dovetail Cutters. . Our O-Ring Dovetail. 150 in. 125” and . Radius r2 is a critical parameter for improving sealing performance. Otherwise, the shape of the groove itself is not important. 080" may require a special insert. O-ring Groove Design in 3 easy steps: Step 1. One of the easiest ways to ensure care-free installation is by following good design practice as recommended in the Parker O-Ring Handbook. Manufactured by Kaiser Tool Company, Thinbit’s Groove ’N Turn toolholders are available in square sizes of ¾" and 1" and are used for making undercuts and thread reliefs at 45-degree angles. Some other. The Computer-Aided Design ("CAD") files and all associated content posted to this website are created, uploaded, managed and owned by third-party users. This type of wood joint is assembled by sliding. Advertisement. My video shows both tails and pins being created by the Wudworx Dovetail tool. like a circular machine slide type groove then I would say the market is very small. Also check gland fill and consider thermal effects. Racetrack Groove Calculation. Ph: 859-269-2351 Fax: 859-335-5128. Dovetail grooves are used to hold the O-ring in place during installation or maintenance. ร่อง Dovetail ใช้เพื่อยึด O-ring ให้เข้าที่บนร่องซีลใบหน้าในระหว่างการประกอบและบำรุงรักษาอุปกรณ์ ร่องอันเดอร์คัทหรือ. Proudly made in the USA by AB Tools, Inc. End up with rectangular groove on three sides vs dovetail. 53mm) and bigger. Where dangerous or hazardous fluids are being used. Radius r2 is a critical parameter for improving sealing performance. How to use Groove command in NX. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent. An undercut or dovetail groove has proven beneficial in many applications to keep the o-ring in place. Lip body. Typically, the completed tail piece then serves as a template for marking and cutting the pins in the pin piece. Circumferential blade root fixings have been used extensivelyThe actual turning method may vary based on the specific groove design, workpiece material, and lathe capabilities. Your o-ring will stretch as much as the groove ID is. Chemraz® O-Rings FFKM. . • Upgraded o-ring groove design – half dove tail o-ring groove design protects the o-ring from being separated from the housing during filter changeout. The right combination of x-ring material and x-ring groove design will maximize sealing performance life. A dovetail that will "hold" the O-ring at room temp. • Encourages the shielding perfor-mance illustrated in the ShieldingTry to keep the depth of the dovetail groove between 1/3 and 1/2 the thickness of the part. . I want to put a dovetail groove into the middle of the four edges. On the edge of one board is a tongue, on the other, a corresponding groove. (I used a 14°, 1/2″ wide bit, the standard for half-blind dovetail jigs. EricHill, I regularly use half dovetail o-ring grooves. Metric o-ring groove dimensions are listed for the most common metric cross sections with and without backup rings. Get the Katz-Moses Magnetic Dovetail Jig here: week’s woodworking joint of the week is the Half Blind Dovetail. [Features] · An HSS cutter that corresponds to the O-ring with groove specification. When Not to Drop Hole. , Japanese JIS, British BS and Common Metric o-ring size charts. If the O-ring size required is known, simply select the AS, BS or ISO standard (such as AS568) and enter the dash size reference. The dovetail dimensions with smallest groove volume and cross-sectional area exhibited flowout, glue bondline thickness, glue coverage and voids within criteria. e. Optimized for O-Ring grooves. The first step in any dovetailed project is committing to cutting dovetails. NX Shortcut Keys - View Full List and Create Custom Keys. Review Business . The groove is cut into the model. The invention discloses composite conducting rail with inside enclosed dovetail groove and preparation method thereof, this composite conducting rail includes aluminium rail body and stainless steel belt, the radial section of aluminium rail body is in I-shaped, the radial section of stainless steel belt is in " C " font, stainless steel belt is seamlessly compounded in the. . Here is how you can add dovetail joints to SolidWorks models really easily. Now, switch on your router and set the base plate flush against both the piece and your edge guide or fence, with the bit itself positioned outside the edge of the wood. 200 info free groove volume at inst (%) radius (mm) Max. 35 adjuster. Squeeze (%) Help. For standard O-ring grooves in the face and radial applications, we recommend 60-90% gland fill. g. 300 in. Before assembly, sand the inside faces of the sides and the front and back pieces, and both sides of the top and bottom to 220 grit. Then, calculate the O-Ring groove diameter as follows: a. With a 10x20 cm cross-section that seems like it might be more doable if I'm understanding the. For dynamic seals, the upper limit of squeeze. Click Done. There is a weight visualization hole next to the weight adjustment dial, you can quickly see the change of dumbbell weight, which is intuitive and so convenient. O-ring design guides include o-ring sizing charts, o-ring groove design references, o-ring chemical compatibility guides, o-ring tolerances and failure analysis guides, and o-ring material selection. For designing systems which contain internal pressure, like the example below, the groove's outside diameter (OD) is primary, and the groove's width then determines the inside diameter. The Apple Rubber Seal Design Guide makes “Seal Thinking™” even more accessible. The Style B, Dovetail Groove design aids in O-Ring retention. For face seals, an o-ring is installed in a groove that is machined into a flat face around a hole. It also provides detailed tables and charts for various O-Ring sizes, materials, and standards. Thin stock is perhaps the one exception. Machines. Groove widths . This metric o-ring groove design reference guide will help you find the right radius, back-up, pressure and other o-ring dimensions for basic applications. TFE/P Aflas® O-Rings Material. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. -With dovetail groove design . When placed together, the boards lock tightly to one another. 004" to 0. Dovetail grooves are used to hold the O-ring in place during installation or maintenance. wide with saddles to 36 in. The modified dove tail groove geometry, using the Parker O-Ring Handbook as a guide, is provided in the attached sketch. a lid which opens regularly. 53mm) and bigger. X-Ring Seals and high performance O-Ring material groove design follows the same principals as basic O-Ring applications, although require even more attention to design adjustments for specific application environments for optimal sealing performance and life. Choose either HSS or Carbide, depending on what material your V-Bit is made from. The dovetail groove has a trapezoidal or dovetail-shaped cross-section. -With dovetail groove design . The O-ring groove calculator enables engineers to specify an O-ring groove for any given O-ring or vice versa calculates the best suitable size O-ring for any given groove. Complementary to these shapes, ultrasonic heads containing dovetail slides in which at. Newsletter. This is SolidWorks video tutorial about 3D Dovetail slide block model design for beginners, showing SolidWorks Swept cut feature application. 7 mm) translation stage that incorporates a dovetail and lead screw translation mechanism for smooth linear positioning along the entire range of travel. 090”, . 20 - Standard Grooving Tools. Lexington, KY 40509. Simultaneous O-Ring Groove Compliant Dovetail Grooving and R Chamfering, Powdered High-Speed Steel, TIALN. See Dovetail Groove Cutters for more information. Clamp the box together. This recommended practice provides the design criteria for static elastomeric O-ring seals used specifically in engine and engine control systems. Five degree sloping sides are easier to machine and are suitable for lower pressures. 188”. . Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. For a design problem that cannot be resolved. The dovetail groove construction is only recommended for O-rings with cross sections of . Visit our groove design page. 8 μm Ra) groove sides: X = 63 micro inches (1. Once you find the exact metric o-ring you need, you can easily order online from the world's largest o-ring inventory network. Create a "master" part with the cut dovetails (brown part). . 12 C. Rework can also be reduced, as the seal cannot be installed incorrectly or inadvertentlyDovetail grooves are used to hold the O-ring in place during installation or maintenance. Same groove dimensions as our O-Ring dovetail cutters that match Parker Hannifin standards. Choose between more than 30 groove materials and 11 O-ring compounds! Benefit from a modern user friendly design and be guided from design rec-ommendations from info boxes. Parker Hannifin Corporation • O-Ring Division 4-19 2360 Palumbo Drive, Lexington, KY 40509 Phone: (859) 269-2351 • Fax: (859) 335-5128 Parker O-Ring Handbook. Do this by taking a chisel and placing it at one end of the base, along the groove, and sliding the guide up to it, then doing the same thing at the opposite end. Catalog excerpts. Grooves. Visit our groove design page for additional information on measurements for O-ring groove depth, width and radius. Harvey Tool's fully stocked selection of O-Ring Slotting End Mills are optimized for machining O-Ring grooves, and feature a stub flute length for improved strength. Dovetail joinery is a type of tongue-and-groove (or tail-and-pin) box joint. An undercut or dovetail groove has proven benefi cial in many applications to keep the O-ring in place. 5 Ø; Carbide Tipped; Corner Rounders. Here is a diagram showing the effective diameter for a 90 degree V-Bit with a 0. This groove can either be extruded, or machined using a special dovetail cutter which is available from Spira. In dovetail drawer joints, the tongues look like actual. The dovetail joint is formed by one or more tapered projections on one piece that engage with corresponding grooves in the other. Create a "slave" part that has no cut dovetails (beige part). To prevent this, there are, depending on the application and pressure range different types of seals. Used to prevent the O-Rings from falling out of the Glands. More Details . These O-rings have cross sections of 0. Radius r2 is a critical parameter for improving sealing performance. Gland Design for Static Application for O-rings with Radial Squeeze Industrial Radial Glands INCHES. Lexington, KY 40509. Dovetail Groove Designs. Dovetail Cutters-Sight Groove Dovetail Cutters. Excentricity info inner diameter stretch at inst (%) +-The present invention particularly provides a dovetail groove sealing material which does not cause dropping from electric or dovetail grooves even when a sealing load or a thrust load is applied from both the left and right sides of the dovetail groove sealing material attached to the vacuum gate valve. It's the quickest sliding dovetail joint to make, and adds both visual interest and strength to projects such as display shelving. This allows the use of a narrower groove width than a standard O-Ring groove, but can also be used in a standard X-Ring groove. Create Device Mockups in Browser with DeviceMock. By creating a proper groove design, you can enhance the sealing capabilities of o rings and prevent leakage. Metalworking’s leading information resource. Boss seal The groove dimensions are incorporated in the standard dimensions. Special consideration must be taken for FFKM seals used in the dovetail configurations to ensure squeeze and. Use this tool for designing new glands based upon desired o-ring sizing. 485”. [email protected]. When vacuum technology components are detachably joined, seals must be used to prevent ambient air from flowing into the vacuum. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. Tongue and groove joints allow two flat pieces to be joined strongly together to make a single flat surface. · Sharpness and machinability are improved by twisting the blade and doubling the flutes. The groove design allows the O-ring to be retained in the axial/face seal during assembly and maintenance. Take advantage of a drop hole if the part design allows it, as it will permit usage of the largest, most rigid tool possible, minimizing the chance of breakage (Figure 1). DOVETAIL O-RING GROOVE DESIGN. This groove type is commonly used for molded or spliced . How to Unlock macOS Watch Series 4. O-Ring volume. Learn More > Contact. I would call Parker and ask them, but you might be left to scaling the design for the 1/16" cross section down by 50% and doing some thorough testing. 625”. O-rings used as Boss Seals can withstand much higher application pressures because the threaded hardware mates to eliminate a clearance gap. The dovetail groove described in Design Charts 4-4 and 4-5 will serve this function. The shape of the O-ring groove depends on the application for the O-ring and can range from triangular to rectangular to dovetail.