. • Encourages the shielding perfor-mance illustrated in the Shielding The dovetail groove described in Design Charts 4-4 and 4-5 will serve this function. The MATCHFIT Dovetail Clamp profile fits a 3/8” deep groove made using a 1/2” diameter, 14º dovetail router bit. The Parker O-Ring Handbook is a. The cross. This is beneficial for special applications. 005) radius size tolerance so the tolerance I define is twice the cutting tool radius size tolerance. Angles range from 7° to 14°. The Spira-Shield patented spiral is the basis for all of our unique high shielding EMI gasketing solutions. D. X-rings are available in the same USA standard sizes. Commonly used in hydraulic systems and other applications with substantial pressure fluctuations. This is beneficial for special applications where the O-ring has to be fixed by the groove e. Place Markers On Layer: Specify the name of the layer for the gadget to create with the markers present. Furthermore, in the multiple dovetail structures shown in Fig. Groove widths . Design points of this design: The design point is the overall shape of the product. In land-based power generation units, turbine blades are connected to the turbine disk by a dovetail joint or fastener. The designer should be especially conscious of the effects of thermal expansion and chemical compatibility for these high gland fill designs. e. [Applications] · Use for O-ring groove machining at a 24° angle. The design is optimized for strength by using an insert pair to generate the groove form. Dynamic Vacuum Sealing There is very little data available on dynamic vacuum seals, but reasonably low leak rates have been reported using two O-rings seals Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. 1 O-ring seals and grooves. In this region, the major source of stress arising is the rotation of an engine shaft. I think the choice is more manufacturing capability or design preference than case/application driven. By definition, a dovetail is a tongue and groove that fit tightly together, thus creating an interlocking joint between two pieces which resist being pulled apart in all directions, except one. The result will be that the ring will extrude itself under that temperature cycle. 5 Ø; Carbide Tipped; Corner Rounders. If you're talking turning ''true '' dovetail grooves i. In the Groove Selection section, you are asked to select the face where the groove will be cut into and the edge on which to cut the material out of relative to the selected face. com Dove Tail Design Guide. In both static and moving applications it is sometimes necessary to mount an O-ring in a face-type groove in such a way that it cannot fall out. When machining this groove, a standard o-ring groove must be machined first. Markez® O-Rings FFKM. The bowtie shape is cut from solid wood, with the grain running lengthwise, and set into the surface of a board at 90° to the grain. This groove is difficult and expensive to machine, and the tolerances are especially critical. 5” profiles, with or without acoustical properties, they also create a highly aesthetic underside for exposed ceilings, and create efficient hanging solution opportunities. 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. Spira offers both standard and custom-sized. This groove can either be extruded, or machined using a special dovetail cutter which is available from Spira. Visit our groove design page. Is the Designer Facing Extinction? Everything To Know About OnePlus. When a piece of equipment requires maintenance or needs to be installed, a metric dovetail groove is often utilized to hold the O-ring in place. 103″. Always refer to the lathe’s user manual and follow best machining practices for optimal results. . Granted, a single dovetail groove can be cut using a dovetail bit with a slightly larger shank diameter, but it would still require a tool change. 이웃추가. Learn More > Contact. 일반 O-RING에 비해 마찰계수가 낮고 압축율 (Squeeze)이 적어. Besides the base and saddle, most dovetail slides have four other parts. 19. Dovetail joints require zero mechanical fasteners, making them more attractive to the traditionalist. Chemraz® O-Rings FFKM. (I used a 14°, 1/2″ wide bit, the standard for half-blind dovetail jigs. A good spot for the groove is approximately 3/8" from the bottom edge of the. O-ring calculator with complete design analysis. Cutting the groove for the drawer can be done with a table saw or a router and router table. g. A dovetail O-ring groove is a type of O-ring groove design that incorporates a dovetail-shaped cross-section. Dovetail seal Also here there is a metal to metal con-tact as long as the construction will not deform under system pressure. Create dovetail grooves that allow O-rings to flex without falling out of place. . For dovetail grooves, match the centerline of the groove with the centerline of the O-ring. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. When joined together, it forms a 90-degree angle just like a traditional butt joint. O-ring. A. Bosstail A sliding dovetail joint is one that is not commonly used, but in specific instances, a sliding dovetail joint can be just what your project needs. Ph: 859-269-2351 Fax: 859-335-5128. Hydrogenated Nitrile HNBR O-Rings Material. Newsletter. 쿼드링은 왕복운동용,회전용,고정용등에. The O-ring is held firmly in place and has no tendency to drop out of the groove when the chamber is open. Design Chart 4-4: Dovetail Grooves. dovetail or half-dovetail grooves, are encountered but are much less common. We have included Static, dynamic, and pneumatic applications. 2360 Palumbo Drive. Trapezoidal design provides consistently positive retention in the groove and creates a larger overlap between groove lip and seal for increased retention. 155". LIKE | SHARE | SU. Rifles are designed with. An undercut or dovetail groove has proven beneficial in many applications to keep the o-ring in place. Surface Finish X groove top and bottom : for liquids X = 32 micro inches (0. Sa a se yon Groove chè nan machin, sepandan, e konsa yo ta dwe itilize sèlman. 7 mm) translation stage that incorporates a dovetail and lead screw translation mechanism for smooth linear positioning along the entire range of travel. As illustrated, the dovetail 154 may be linear, i. 6Fire. Then, calculate the O-Ring groove diameter as follows: a. 2360 Palumbo Drive. Inside is the circle of the corresponding o-ring which should be deleted or turned to construction. O-ring Options for a Nominal Groove. 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. Groove designs presented herein are applicable for use with machined or formed metal seals which are similar in configuration to those shown in figure 3, which operate under internal pressure or in vacuum service and which have been specifically qualified or recommended by the purchaser or the manufacturer for use with. . GROOVE 'N TURN® dovetail grooving inserts are used to machine O-ring dovetail grooves with 66° undercut angles. Dovetail Cutters-Sight Groove Dovetail Cutters. The calculator takes all relevant parameters into account like: O-Ring squeeze. The AS568-901 through -932 O-ring sizes (Parker’s 3- series) are intended to be used for sealing straight thread tube fittings in a boss. Once you find the right o-ring groove design you can easily order online from the world's largest. I just completed a similar design using a dovetail groove and about a quarter inch cross-section o-ring on a two and a half inch diameter. Learn about the factors that affect vacuum sealing performance, such as o-ring size, material, groove geometry, surface finish, and lubrication. Dovetail grooving inserts are used to machine O-ring dovetail grooves with 66-degree undercut angles. 125, and . 20. 8 μm Ra) groove sides: X = 63 micro inches (1. The groove design allows the O-ring to be retained in the axial/face seal during assembly and maintenance. Contact Us For Assistance Or Samples Click Here and contact us today to receive a free quote or if you have any questions regarding sizing. All are made with premium carbide to optimize strength and durability, giving you the longest life and best finish on hard metals. 150" in . More Details . So my issue is that, someone gave the major diameter of the dovetail a positional tolerance and made it a datum feature. Dovetail O-Ring Groove Design Guide – Basic Recommendations #34. 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 joints are a sign of a true craftsman. 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. Gland Width (G) Gland Depth (L) RadiusWith a miter joint, each piece of wood is cut at a 45-degree angle. However, this is an expensive groove to machine, and thus should be used only when absolutely necessary. 809 . 9E - Dovetail Groove (Fabco, Numatics, Rotomation). (fig. 4c, dovetail grooves with one side cut off were located at positions 9 mm left and right from the center of the contact surface. Tongue and groove joinery can also be used to form square joints. This groove can either be extruded, or machined using a special dovetail cutter which is available from Spira. world design provides improved installation into both straight-wall and dovetail grooves. In dovetail drawer joints, the tongues look like actual. [Features] ・ It consists of a rack rail and a pinion. Mate Diameter: Displays a reference value for the diameter of the non-grooved mating part that completes the. Try for free View pricing. But an insufficient radius will potentially cause damage to the O-ring during installation, while an excessive radius may result in extrusion failure. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. EricHill, I regularly use half dovetail o-ring grooves. 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. Using the table above, determine the maximum recommended gland depth for your application. O-rings used as Boss Seals can withstand much higher application pressures because the threaded hardware mates to eliminate a clearance gap. Max. The dovetail groove has a trapezoidal or dovetail-shaped cross-section. The retention feature makes having an upside-down or vertical face seal groove much easier. Solid Carbide; Carbide Tipped; M42 Large Radii; Full Radius, Top & Bottom. . 12 C. Proudly made in the USA by AB Tools, Inc. Try not to get any glue on the edges of the top, as it should float freely in its groove. In addition, this PIP seal minimizes seal wear on groove corners and removes the parting line from. For exact details, refer to manufacturer catalogs . The calculator takes all relevant parameters into account like: O-Ring squeeze. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent. Let's assume a knee type milling machine with dovetail ways for all three axes. Dovetail grooving inserts are used to machine O-ring dovetail grooves with 66° undercut angles. For a rod (shaft) seal:O-Ring Max Groove Diameter = Min Shaft Diameter + (2 x Recommended Gland Depth) b. The first component is the dovetail slot, we'll cut this using a handheld router and a 1/2 inch dovetail bit. It. Manual Z-Axis Stages - V-Groove Cross Roller and Dovetail, Rack & Pinion, Long Travel, 40X50. Installation steps This recommended practice provides the design criteria for static elastomeric O-ring seals used specifically in engine and engine control systems. One of the easiest ways to ensure care-free installation is by following good design practice as recommended in the Parker O-Ring Handbook. Use this tool for designing new glands based upon desired o-ring sizing. 435 . Dovetail Clamps move through the tracks below the surface, securing material without getting in the way. 050, . info movement. . Typ. Ph: 859-269-2351 Fax: 859-335-5128. The MATCHFIT Dovetail Router Bit is designed especially for the MATCHFIT Dovetail Clamps and dovetail hardware. The MATCHFIT dovetail track system allows you to create your own tracks with just a router bit. 438dovetails. x = D ( 1 + cot 1/2 α ) + a. A dovetail joint or simply dovetail is a joinery technique most commonly used in woodworking joinery (carpentry), including furniture, cabinets, [1] log buildings, and traditional timber framing. Thin stock is perhaps the one exception. 100”, . Direction (optional) Select a plane, a planar face, or a straight edge to define the direction of the lip and groove. Volume fill is the O-ring volume divided by the gland volume. Dovetails & Half Dovetails. Dynamic Seal TypesDovetail O-ring design. Half Dovetail Grooves. I want to put a dovetail groove into the middle of the four edges. tel: 250-382-4555. 150 in. 5 mm). The right combination of x-ring material and x-ring groove design will maximize sealing performance life. After the first tail has been cut, turn the stock 180 degrees and place the opposite side into the jig. 070”, . Gland Design for a Static Application; for O-rings in Dovetail Grooves, INCHES. Dovetail groove cutters are the tool needed to cut a dovetailed groove, recommended for many of Spira’s groove mounted gaskets. Inser. The dovetail groove construction is only recommended for O-rings with cross sections of . The insert design is optimized for strength by utilizing an insert pair to generate the groove form. Lexington, KY 40509. It should be used only when it is absolutely necessary. The retention feature makes having an upside-down or vertical face seal groove much easi. Groove Radius. Dovetail: The O-ring is also axially squeezed in a dovetail groove. g. Create Device Mockups in Browser with DeviceMock. This groove is not common because it is more expensive to machine, but this dovetail groove can avoid seal extrusion out. Design Chart 4-4: Dovetail Grooves Dovetail Grooves It is often necessary to provide some mechanical means for holding an O-ring in a face seal groove during assembly and maintenance of equipment. Depth Of Dovetail: Enter the depth of the dovetail you have created. The dovetail dimensions with smallest groove volume and cross-sectional area exhibited flowout, glue bondline thickness, glue coverage and voids within criteria. g. Ph: 859-269-2351. Polyurethane O-Rings Material. Gland Design Dovetail Grooves Gland Design for a Static Application for O-rings in Dovetail Grooves, METRIC Dovetail grooves are used to hold the O-ring in place during installation or maintenance. Groove width Design Guide 4-2: Guide for Design Table 4-2. We're proud to offer the world's largest inventory of readily-available and highly customized sealing solutions. Dovetail joints are commonly used in furniture creation, thanks to their inherent resistance and tensile strength. Create dovetail grooves that allow O-rings to flex without falling out of place. Radius r2 is a critical parameter for improving sealing performance. Dovetail rails for detachable sights The SIG Sauer 200 STR has an 11 mm dovetail on the receiver for mounting a diopter rear sight or a scope sight, either directly or via a Picatinny rail adapter. of O-ring i (see Table 4-1) I. 412 . Commonly used on rimfire rifles and air guns, the dovetail mounting system features two grooves that run parallel to the bore. 6Fire. This is SolidWorks video tutorial about 3D Dovetail slide block model design for beginners, showing SolidWorks Swept cut feature application. 5. When you pick up the dumbbell, it will not be dragged/carried together. Select a standard, groove type, and available groove size from the lists on the top left of the tab. Dovetail joinery is a type of tongue-and-groove (or tail-and-pin) box joint. For pressures above 103. O-ring groove design is a key consideration in the o-ring selection process. O-Ring volume. If this is. , Tube Fittings Div. A tongue-and-groove joint is a popular option in flooring and wood paneling: this joinery is one of the most self-explanatory wood joints. . The tongue is a piece of the wood board that sticks out, and the groove is the space it fits into on the adjacent board. We have been very fortunate in the many opportunities we have had to work with dedicated and gifted engineers. The design stretch is so small in these large sizes that the O-ring tends to sag out of the groove before it is assembled. 005 . Using only hand tools, Chris Gochnour builds a Shaker classic that is as solidly constructed as it is beautiful. An undercut or dovetail groove has proven beneficial in many applications to keep the o-ring in place. Dovetail Flange O-Ring Groove Design Chart. 00. A static axial seal acts similar to a gasket in that it is squeezed on both the top and bottom of the o-ring's cross section. Wider outlet drainLiam Thomas discovers a new technique for cutting sliding dovetails. Gland width is to sharp edge of groove. , the THINBIT GROOVE ‘N TURN line includes Dovetail grooving inserts and Static O-Ring Grooves. 2. #Dovetail #dovetailjoints #metalprojectFollow me on Instagram: Joints are a traditional slide mechanism th. Gland Size Calculator. For the slot you'll need a handheld router and the dado jig shown below. Get started for free, then upgrade from $30 USD / month. Circumferential blade root fixings have been used extensivelyThe actual turning method may vary based on the specific groove design, workpiece material, and lathe capabilities. Alternate solutions for creating retention in vertically oriented face seal grooves are: • Dovetail or Half Dovetail • EZ-Lok • Diamond Seals and H-Seals • Friction Fit Spliced Profiles. wide with saddles to 36 in. 00. Thankfully it was only a one-off. Besides the base and saddle, most dovetail slides have four other parts. When placed together, the boards lock tightly to one another. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. How to Design for 3D Printing. Download the pdf to. O-ring groove design is a key consideration in the o-ring selection process. EricHill, I regularly use half dovetail o-ring grooves. All-in-One Adjustable Dumbbell . Click Grooves (Toolbox toolbar) or Toolbox > Grooves . Gland Design Dovetail Grooves Gland Design for a Static Application for O-rings in Dovetail Grooves, METRIC Dovetail grooves are used to hold the O-ring in place during installation or maintenance. The breakthrough dovetail clamps are design gives you the freedom to create your own tracks grooves using a dovetail router bit to clamp virtually anywhere. 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. 001" increments Inserts can groove, turn/bore and generate profiles. The spiral is wound out of spring temper beryllium copper for excellent spring memory and compression set resistance. Describes the groove. The modified dove tail groove geometry, using the Parker O-Ring Handbook as a guide, is provided in the attached sketch. Dovetail grooves help hold orings in place during installation and maintenance and are recommended for O-rings that have a larger cross-section. O-Ring inner diameter stretch, outer diameter squeeze. When there is risk for extrusion use contoured hard rubber or plastic back-up rings. 832 . 4. Dovetail Groove. Standard dovetail-slide sets range from a couple inches to 20 in. The toolholders can be used on conventional, Swiss and CNC machines for grooving insets in sizes from 0. Learn More > Contact. Techblog. 4개의 둥근 돌출부가 있는 쿼드링 (QUAD RING) 혹은 X-RING은. Set up your dovetail jig for cutting tails, and place the end of one of the two side pieces into the jig. If the dovetail is too narrow, balancing the piece on the router table is difficult. sKLICK – Dovetail Connector. Parker O-Ring Handbook - ORD 5700 pdf. com. This groove is difficult and expensive to machine, and the tolerances are especially critical. Use this tool for analyzing your current gland and o-ring combination. 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. The four-lobed design produces a more secure seal to counteract spiral twisting. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. Each CAD and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or real-world item. --. Design Groove; Design O-Ring; Input O-Ring & Groove; Application info temperature (ºC) info pressure. Perhaps only one side of the dovetail requires accuracy. Dovetail grooves are used to hold the O-ring in place on a face seal groove during assembly and maintenance of equipment. Please contact Greene Tweed engineering for help or advice if required as some applications are difficult to optimize both at ambient and operating temperatures. As important as the o’ring seal itself is the groove that the o’ring seats into. Popular Sealing Material Families. This joint is best achieved in a hand-cut. This recommended practice provides the design criteria for static elastomeric O-ring seals used specifically in engine and engine control systems. It achieves the same sealing efficiency with either internal or external pressure. The dovetail groove samples show a 11% decrease in flexural strength compared to the ones without grooves, this is due to the uneven distribution of resin through the grooves. 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. 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. 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. The purpose of this study is to compare the clinical characteristics of the slot and. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. . End up with rectangular groove on three sides vs dovetail. Groove widths less than . A sliding dovetail joint consists of a long groove with angled sides to serve as the tail for the sliding dovetail joint, while a corresponding long pin is cut into the end of the adjoining board. . Calculated Results. It should be used only when it is absolutely necessary. groove shape Ball shaped High stiffness Small deformation capabilities Avoid metal to metal contact (Particle generation) Big influence of geometric tolerances Dovetail shaped Low stiffness Large deformation capabilities Metal to metal contact possible (design measures)DuPont has developed a unique seal design to improve seal life in dovetail grooves. While Dove Tail O-ring grooves are effective at keeping an O-ring in place, they are expensive to manufacture and should only be used if absolutely necessary. TFE/P Aflas® O-Rings Material. Dovetails can be. DIY add a sight. s e a l s The unique geometry of Greene, Tweed’s Dovetail Seal precludes twisting and simplifies. FFKM Markez® O-Rings Material. Keep in mind this dovetail groove is a tool path around the entire perimeter of the plate and not just a local feature. No less than 75% of the seal cross-section should be contained within the groove to ensure the seal does not “roll” or extrude out of the groove. Racetrack Groove Calculation. has a geometry that won't allow for thermal expansion of the ring at 350 F. 1-30). 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. The Picatinny design consists of a strip undercut to form a hexagonal cross-section with crosswise. It is an object of the invention to according to three-level disk oat tail groove structure feature, design a kind of dedicated probe, realize three-level disk Dovetail groove in situ detection. The groove design allows the O-ring to be retained in the face seal during assembly and maintenance. . Catalog excerpts. Special consideration must be taken for FFKM seals used in the dovetail configurations to ensure squeeze and. . Dovetail Gadgets. -Material: Ductile iron . address: 1017 Oliphant Ave, Victoria BC, V8V 2T9. Gland Design for Static Application for O-rings with Axial Squeeze Surface Finish X groove top and bottom : for liquids X = 32 micro inches (0. This is an expensive groove O-ring groove design is a key consideration in the o-ring selection process. 5 Bar (1500 psi) Max. a lid which opens regularly. Certain authors have suggested the use of additional means of secondary retention in class III preparations of primary anterior teeth. The insert design is optimized for strength by utilizing a left/OD and right/ID insert pair to generate. Narrower groove for sealing vacuum or gas. There’s a lot to love about the design of MicroJig’s Dovetail Clamp AP. But an insufficient radius will potentially cause damage to the O-ring during installation, while an excessive radius may result in extrusion failure. Moderate force gaskets come without a cord unless specified otherwise. To create a retaining-ring groove, click the Retaining Ring Grooves tab. The inserts are available in submicron. Compared to traditional O-rings, the Dovetail Seal offers better seal integrity, reducing the potential for process / contamination and allowing for more than twice the sealing force. Dovetail o-ring groove design is used to prevent o-rings from falling out of the gland. Dovetail joints are beautiful to look at and strong, plus they are the most difficult joints to execute. 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 design of the grooves help lock the concrete in to place, while also eliminating air infiltration. products. The technical scheme is that：A kind of diskware dovetail groove original position ultrasonic inspection probe, including：Frock 1, probe 2, coupling. Standard dovetail-slide sets range from a couple inches to 20 in. Dovetail: The O-ring is also axially squeezed 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. com O-Ring Products. A sliding dovetail joint is one that is not commonly used, but in specific instances, a sliding dovetail joint can be just what your project needs. When it comes to sealing applications, the design of the o ring groove plays a crucial role in ensuring optimal performance and efficiency. For Depths of Cut 2-1/2 to 3 times groove width. In radial grooving, the groove is cut perpendicular to the axis of the workpiece, effectively radiating out from the center of a cylindrical part. This design designates the main view as the photograph that best shows the main points of. 6 μm Ra) O-ring Groove Design in 3 easy steps: Step 1. or longer in some cases. • Attaching turbine blades to jet engine. Modifications to. 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. • Easy to use • PDF output • Saving of your designs • Easy search for ERIKS standard O-rings Visit: orldwide unique features now online! 12. 100, . O Ring Groove Design Standard. 8 μm Ra) groove sides: X = 63 micro inches (1. Static applications: stretch the diameter by up to 5% and compress by up to 3%. Designing for interlocking joints. See the Dovetail Groove Cutter data sheet for more information (page 36). O-rings used as Boss Seals can withstand much higher application pressures because the threaded hardware mates to eliminate a clearance gap. There are two parts to a dovetail joint, pins and tails. A dovetail face seal is a special static gland designed to retain the o-ring in the groove.