The dovetail groove construction is only recommended for O-rings with cross sections of . Figure 5: Face and edge selection for the groovetested in face type O-ring seals using grooves that provided 15%, 30% and 50% compression. Secure material with ZERO interference. Dovetail Groove Designs. April 19th, 2023. On the edge of one board is a tongue, on the other, a corresponding groove. 6Fire. . O-Ring Design Guides for Engineers. Info Hub. With the key in place, the “butterfly” shape prevents the board (s) from separating. You can add industry standard O-ring and retaining-ring grooves to your cylindrical model. . 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. O-ring. . In addition, this PIP seal minimizes seal wear on groove corners and removes the parting line from. Is the Designer Facing Extinction? Everything To Know About OnePlus. 139 inch (3,53 mm) and bigger. The retention feature makes having an upside-down or vertical face seal groove much. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. Compare x-ring material compounds and easily order online from the world's largest x-ring inventory network. Square O-rings – PJSC KAUCHUK Rubber compounds and rubber parts #35. Have a look at the attached sketch. Thinbit, manufactured by Kaiser Tool Company, has expanded its Groove ‘N Turn line to include dovetail grooving inserts. After machining the "reachable. Installing and adjusting dovetail sights is simple if you have the proper tools. Dovetails come in several different types and sizes depending on manufacturer, but the most common are the 11 mm and 3 ⁄ 8 inch (9. 020″! To select a V-Bit in G-Wizard, treat it like an endmill. The technical scheme is that：A kind of diskware dovetail groove original position ultrasonic inspection probe, including：Frock 1, probe 2, coupling. 100, . May 1, 2017. 500 Major Diameter. Dovetail groove cutters are the tool needed to cut a dovetailed groove, recommended for many of Spira’s groove mounted gaskets. 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. The right combination of x-ring material and x-ring groove design will maximize sealing performance life. #Dovetail #dovetailjoints #metalprojectFollow me on Instagram: Joints are a traditional slide mechanism th. Visit our groove design page. 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. HSS cutter for O-ring groove. O-Ring & Engineered Seals. e. If you don’t have a marking knife, then just use a utility knife or pocket knife. This groove is not common because it is more expensive to machine, but this dovetail groove can avoid seal extrusion out. 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. This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. 19. 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. By simply entering installation specifications for an application, it recommends O-Ring sizes, housing layout and corresponding part. Cut along each of the lines and chisel out the waste between the pins. Dovetail groove geometry is a bit of an art. Quick example below (blacked-out part is the O-ring to indicate placement). † This groove width does not permit the use of Parbak rings. Tag: dovetail ×. Spira offers both standard and custom-sized. If you're talking turning ''true '' dovetail grooves i. You can also visit our Mobile inPHorm which is an engineering resource for material selection and gland design for O-ring applications. (I used a 14°, 1/2″ wide bit, the standard for half-blind dovetail jigs. , the THINBIT GROOVE ‘N TURN line includes Dovetail grooving inserts and Static O-Ring Grooves. This o-ring gland design guide is intended for use in specifying o-ring and gland dimensions for static applications Dichtomatik North America. The Spira-Shield patented spiral is the basis for all of our unique high shielding EMI gasketing solutions. Shop Manual Z-Axis Stages - Dovetail Groove, Rack & Pinion, Long Stroke, ZLWG Series from MISUMI. Dovetail grooves are used to hold the O-ring in place during installation or maintenance. Popular Sealing Material Families. It should be used only when it is absolutely necessary. D. Ted . Designed to prevent O-ring extrusion under high-pressure conditions. O-Ring & Engineered Seals. Complementary to these shapes, ultrasonic heads containing dovetail slides in which at. 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. The EZ-Lok seal is designed specifically to simplify and error-proof the installation process. Because they can be expensive to machine, O-ring grooves should only be added when necessary or for metric O. 5 Bar (1500 psi) Max. In this quick video, I will brief you on the project ahead so that you know what to expect and can get the most from this course. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. Inside is the circle of the corresponding o-ring which should be deleted or turned to construction. Parker O-Ring Vacuum Sealing Guide is a comprehensive pdf document that provides technical information and best practices for designing and selecting o-ring seals for vacuum applications. 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. g. Dovetail O-Ring Groove Design Guide – Basic Recommendations #34. . One of the easiest ways to ensure care-free installation is by following good design practice as recommended in the Parker O-Ring Handbook. We're proud to offer the world's largest inventory of readily-available and highly customized sealing solutions. Dovetail is a unique design which allows installation of mounts on various rifles. 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. (2) The interfaces between 5083 aluminum alloy and Q345 steel with dovetail grooves were. KLICK – Dovetail Connector. 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. Once you find the right o-ring groove design you can easily order online from the world's largest. Reset Custom Tolerance. 8 μm Ra) groove sides: X = 63 micro inches (1. Select the type of O-ring groove - piston, rod, face seal or trapped seal. . In the dovetail groove design, radius r1 never contacts the O-ring – so it does not affect the seal. Interchangeable with the standard O-ring used in half-dovetail grooves, making seal replacement in the field quick and easy. Get started for free, then upgrade from $30 USD / month. , but not more than +. 쿼드링은 사각에서 씰링 역할을 하므로 압력의 부하분포가 고르게. 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. Since I want to use the same joint on all four corners I copied the lines with the Move tool and placed it at the corner of the box. 75 – $ 115. 형성된다. Installation steps This recommended practice provides the design criteria for static elastomeric O-ring seals used specifically in engine and engine control systems. V-Grooves / Chamfers (Customized Straight Blades) V-Grooves / Chamfers (Customized Straight Blades). This requires looking at the dimensionally largest. 8 μm Ra) groove sides: X = 63 micro inches (1. , Japanese JIS, British BS and Common Metric o-ring size charts. The inserts are for machining O-ring dovetail grooves with 66° undercut angles. Dovetail The O-ring is also axially squeezed in a dovetail groove. . Ph: 859-269-2351 Fax: 859-335-5128. To help you maximize o-ring performance, this dovetail o-ring groove design guide provides default recommendations to find the perfect o-ring dimensions. The wedge-shaped projections offer a better, tighter fit due to the increased friction. U. The mounting platform is a 1. And with just a few simple tips, you’ll be routing perfect joints in no time. Min. When used as a face seal involving either internal or external pressure, the o-ring should. This groove design is rela-tively uncommon as it is expensive to machine and should not be used unless absolutely required. DOVETAIL O-RING GROOVE DESIGN. O-Ring groove design +. O-Ring can extrude into clearance gap or get squeezed in two directions. I have spent a few hours researching and trying things. Analysis of a dovetail O-ring groove performance – ScienceDirect #36. This groove is difficult and expensive to machine, and the tolerances are especially critical. Commonly used in hydraulic systems and other applications with substantial pressure fluctuations. See full list on globaloring. The smaller the angle, the more precise the fit must be. info compression (%) Groove info material. Design Groove; Design O-Ring; Input O-Ring & Groove; Application info temperature (ºC) info pressure. O-ring groove design is a key consideration in the o-ring selection process. A dining table commission came into the workshop recently that required an oak ( Quercus robur) base capable of holding a 100kg concrete top. Project Overview. R L 66° R1 Mean Groove Diameter Coincides With Mean O-ring Diameter. 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. Similar Tools. 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. It also provides detailed tables and charts for various O-Ring sizes, materials, and standards. D. Features long reach and reduced neck styles for deep pocket machining, as well as corner radius geometries for strength. . Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent. -Material: Ductile iron . . This is beneficial for special applications where the O-ring has to be fixed by the groove e. A sliding dovetail joint is a variation of the traditional dovetail joint, characterized by a single, elongated dovetail-shaped groove that slides into a corresponding slot, fitting snugly together. Select a body or component on which to create the lip. 200 info free groove volume at inst (%) radius (mm) Max. 3/8" dovetail rails are a common, standardized style within the rimfire industry and are inexpensive to machine into the firearm's frame. S. O-rings used as Boss Seals can withstand much higher application pressures because the threaded hardware mates to eliminate a clearance gap. 20 - Standard Grooving Tools. Moderate force gaskets come without a cord unless specified otherwise. For dynamic seals, the upper limit of squeeze. Dovetail groove cutters are the tool needed to cut a dovetailed groove, recommended for many of Spira’s groove mounted gaskets. Formed in this manner, the rotor blades 126 may be axially inserted into the dovetail grooves 162 a linear fashion. O-ring design guides for engineers help select the best o-ring material specifications for your applications. These charts give dimensional information relating to standard and o-ring and dovetail o-ring grooves. It provides axial compression (face type) groove dimensions for aerospace metric O-ring sizes specified in MA2010. Anywhere a maker can mill this groove, a clamp can be added and used. 005 . 00. 53mm) and bigger. The most important variable for installing an O-ring into a dovetail gland is making sure the seal is sized properly. According to the company, the insert design is optimized for strength by using a left/OD and right/ID insert pair to generate the. Specialty Profiles. The two horizontal axes are the easiest so let's begin there. 2. In large male gland assemblies, it may be desirable to use an O-ring one size smaller than indicated in the design chart. In reply to indigetal, The Wudworx dovetail extension does create both tails and pins. On a table saw, set the cut height for a little more than half the thickness of the drawer side material, and cut a groove to fit the thickness of the drawer bottom material. 139 inch (3. NX 1980In this video, we learn about Groove commands of NX. Parker Hannifin2360 Palumbo DriveLexington, KY 40509Ph: 859-269-2351Fax: 859-335-5128 oesmailbox@parker. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. 2. . 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. Recommended surface finish: 16. To make a typical through dovetail, set the bit to cut a groove 5 ⁄ 16 " deep. Join 10,000 teams building products people love. These were known as "mechanical Babbitt anchors" and they were used because chemical tinning processes did not exist. A dovetail face seal is a special static gland designed to retain the o-ring in the groove. by kisolre » Tue Aug 13, 2019 6:51 pm. 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. From the Charpy test, it was observed that the toughness of the T-groove and the dovetail sample is 100% more than the sandwich composite without grooves. In dovetail drawer joints, the tongues look like actual. The dovetail bit is most famous for use in creating tails for dovetail joinery. GROOVE DESIGN. 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. Angles range from 7° to 14°. THINBIT, manufactured by Kaiser Tool Company, has announced the expansion of its GROOVE 'N TURN line of dovetail grooving inserts. Dovetail grooves are. Excellent sealing efficiency. In dovetail drawer joints, the tongues look like actual. To retain them, you need to dovetail the groove (make it a trapezoid shape). Dovetail grooves are used to hold the O-ring in place during installation or maintenance. In the dovetail groove design, radius r1 never contacts the O-ring – so it does not affect the seal. 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. The reliability of a gas or steam turbine is strongly dependent on the structural design of its blades. 200 info free groove volume at inst (%) radius (mm) Max. 125” and . The dovetail groove described in Design Charts 4-4 and 4-5 will serve this function. For male gland seals, an o-ring is installed in a groove that is machined into the OD of the “piston. 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. There are two parts to a dovetail joint, pins and tails. dovetail or half-dovetail grooves, are encountered but are much less common. 080, . 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. Surface Finish Static Grooves Straight-sided grooves are best to pre-vent extrusion or nibbling. Common examples for where a drop-hole would not be allowed include: In high pressure applications. As shown in above figure, an O-ring also gets compressed axially in a dovetail groove. Quad Ring benefits include: Less wear due to low friction, thus providing a longer service life. This is beneficial for special applications where the O-ring has to be fixed by the groove e. 5. The dumbbell base is made of ductile iron and has a certain weight. These pictured tools are designed to mill a groove for a Parker Hannifin O-ring groove No. . To make a typical through dovetail, set the bit to cut a groove 5 ⁄ 16 " deep. Learn More > Contact. Larger overlap between groove lip and trapezoidal seal provides a more secure level of retention. The Picatinny design consists of a strip undercut to form a hexagonal cross-section with crosswise. Let's assume a knee type milling machine with dovetail ways for all three axes. Dovetail Groove-2%: 5%: Dovetail Groove – Sidewall Height. . My questions are on the design and machining of the oil grooves in the surfaces of the dovetails. O-Ring groove 자료를 찾아보면 Depth, Width 부분에 있어 약간씩 차이가 있고흔히 clearance/gap 이라고 하는 부분은 지정해주는 카탈로그도 있고 하기의 "F" 값만 주고 clearance/gap 은 명기하지 않는 경우가 대부분임설계자가. , Tube Fittings Div. Dovetail o-ring performance, whether for bolted flanges or open and close lids, varies greatly depending on width, diameter, cross-section and corner radii dimensions. A dovetail that will "hold" the O-ring at room temp. AIR1108. Gland Design for Static Application for O-rings with Radial Squeeze Industrial Radial Glands INCHES. E. Click Done. The most important consideration for gland design is that it allows for proper and complete compression between the groove and the surface mating to it. O-rings used as Boss Seals can withstand much higher application pressures because the threaded hardware mates to eliminate a clearance gap. a lid which opens regularly. If you are doing the slot in hardwoods sometimes it's preferable to clean out the first pass with a straight bit. In this case, the groove is cut into the surface of the board and the tongue is milled on the edge. sizes with major diameters starting at . Create Device Mockups in Browser with DeviceMock. Special consideration must be taken for FFKM seals used in the dovetail configurations to ensure squeeze and. Tongue and groove joints allow two flat pieces to be joined strongly together to make a single flat surface. 750 Ø to 1. The dumbbell base is made of ductile iron and has a certain weight. Designing for interlocking joints. use a ruler to measure the edge of the sight base to the edge of the dovetail groove. 53mm) and bigger. The dovetail was about at the limit of what could be machined easily. The Parker handbook does not define the bottom (. Static Gland SealHalf Dovetail Groove. 5” profiles, with or without acoustical properties, they also create a highly aesthetic underside for exposed ceilings, and create efficient hanging solution opportunities. GROOVE 'N TURN® dovetail grooving inserts are used to machine O-ring dovetail grooves with 66° undercut angles. Dovetail: The O-ring is also axially squeezed in a dovetail groove. 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. 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. The utility model discloses a dovetail groove detection apparatus, belonging to the field of measuring tools, comprising a handle and a detection body, wherein the outer surface of the detection body, along a length direction is formed by a first side surface, a bottom surface, a second side surface and an upper surface which are orderly connected, the cross section. “D” Multi-Seal is a groove-mounted gasket with a bulbous silicone elastomer for an excellent environmental seal. This figure is based on NBR O-rings with a cross section of . Making a dovetail oring groove is an annoying task on a good day at normal size scales. The top is wide and the bottom is smaller, you can easily put the dumbbell back on the dumbbell base. Select the type of O-ring groove - piston, rod, face seal or trapped seal. a lid which opens regularly. O-Ring Groove design plays an important part in how an o-ring seals. It should be used only when it is absolutely necessary. Used to prevent the O-Rings from falling out of the Glands. The MATCHFIT dovetail track system allows you to create your own tracks with just a router bit. Dovetail grooving inserts are used to machine O-ring dovetail grooves with 66-degree undercut angles. These dovetail inserts can be used on conventional, Swiss-type and CNC machines. 5" Dovetail. 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. 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. It achieves the same sealing efficiency with either internal or external pressure. You also have the option to tick Tangent propagation, which extends the selection to tangential faces. Surface Finish X groove top and bottom : for liquids X = 32 micro inches (0. Using the table above, determine the maximum recommended gland depth for your application. The sKLICK connector serves as a non-visible, snap-in connector for components with small dimensions, such as mouldings and trims. An undercut or dovetail groove has proven benefi cial in many applications to keep the O-ring in place. The guidelines are for the nominal condition. 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. 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. In land-based power generation units, turbine blades are connected to the turbine disk by a dovetail joint or fastener. If you go below 7°, you’ll start to lose the mechanical strength of the dovetail. 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. 6Fire. Covering 1 groove and other applications of groovesMaterial covered:Dovetail grooveCurvatures and groovesPinning groovesFasteners with groovesToy design groo. Ph: 859-269-2351. It. 001" increments. Our custom KLICK Dovetail Router Bit is specifically designed to route the groove for the KLICK and sKLICK. For technical assistance with any of. This groove is difficult and expensive to machine, and the tolerances are especially critical. 6 μm Ra)Dovetail joinery is a type of tongue-and-groove (or tail-and-pin) box joint. 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 design charts in the sections below indicate a surface roughness value not to exceed 32 micro-inches (32 rms) on the sealing surfaces for static seals with a maximum of 16 rms recommended for face-type gas seals. It provides axial compression (face type) groove dimensions for aerospace metric O-ring sizes specified in MA2010. EricHill, I regularly use half dovetail o-ring grooves. To precisely locate the groove on the face: In the FeatureManager design tree, expand the groove feature. The Style B, Dovetail Groove design aids in O-Ring retention. 2. The angled face must face to the inside of the groove for it to retain the o-ring when the o-ring is streched into the groove. . These charts give dimensional information relating to standard and o-ring and dovetail o-ring grooves. Dovetail: The O-ring is also axially squeezed in a dovetail groove. The spiral is wound out of spring temper beryllium copper for excellent spring memory and compression set resistance. 5 mm). 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 Groove Design in 3 easy steps: Step 1. Browse design considerations and recommendations for. The dimensions listed in the O-Ring Handbook put good compression on the O-ring while preventing the groove from exceeding 100% fill. Manufacturers such as MGW make universal or model-specific sight tools. 00E-0,6), f. Triangular Crush Groove Design. FKM Viton® O-Rings Material. 11:29. 1-30). Dovetail joints are a sign of a true craftsman. Dovetail alignment board. 16mm diametrically) is enough to allow two pieces. Do one once as a library feature and you can drag and drop to add them in. 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. 3. The groove design allows the O-ring to be retained in the axial/face seal during assembly and maintenance. 005" or . Try not to get any glue on the edges of the top, as it should float freely in its groove. 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. This section calculates the equivalent circular groove dimensions, for use in the Seal Design Section, for a racetrack groove. 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. O-Ring volume. Other edge styles including micro-bevel t&g, butt joint or shiplap are available upon request. Dovetail seal Also here there is a metal to metal con-tact as long as the construction will not deform under system pressure. The Computer-Aided Design ("CAD") files and all associated content posted to this website are created, uploaded, managed and owned by third-party users. Perhaps only one side of the dovetail requires accuracy. Parker Hannifin Corp. Radius r2 is a critical parameter for improving sealing performance. 12. com DOVE-TAIL GLANDS Used to prevent the O-Rings from falling out of the Glands. Woodworkers use it to. Design points of this design: The design point is the overall shape of the product. For bolted flanges or open & close lids. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. When placed together, the boards lock tightly to one another. How to Unlock macOS Watch Series 4. 12 C. I. The inserts are available in submicron. Create a "slave" part that has no cut dovetails (beige part). Designed for higher pressure fluid power applications, these O-Ring Face Seal (ORFS) Hydraulic Fittings meet or exceed SAE J1453 and ISO 8434-3 standards. Standard O-Ring in half-dovetail groove Seal retention depends on O-Ring compression Trap-Seal™ in half-dovetail groove Secure retention – Trap-Seal™ is tucked under the groove lip Enhancement shapes up to a more secure, leak-free performance. We have included Static, dynamic, and pneumatic applications. The blade and disc's interface region (dovetail) is an integral part that plays an essential role in advanced flight machines. com. To create a retaining-ring groove, click the Retaining Ring Grooves tab. The special groove walls are good way to retain the seal, because the groove essentially pinch the seal, keeping it in position. The insert design is optimized for strength by utilizing an insert pair to generate the groove form. • Easy to use • PDF output • Saving of your designs • Easy search for ERIKS standard O-rings Visit: orldwide unique features now online! 12. 030, . Racetrack Groove Calculation. A rack and pinion type stage (X-axis) that is ideal for making quick and large movements. A feature appears in the FeatureManager design tree with a name that matches the Description. Gland Width (G) Gland Depth (L) RadiusWith a miter joint, each piece of wood is cut at a 45-degree angle. Five degree sloping sides are easier to machine and are suitable for lower pressures. Simply route a groove anywhere you need using a 1/2”–14º dovetail router bit. Advantages. Anwendungsparameter & Materialauswahl. This groove can either be extruded, or machined using a special dovetail cutter which is available from Spira. 2360 Palumbo Drive. It is suggested that as much information as possible be input about an existing groove. Calculate the O-Ring groove dimensions. However, this is an expensive groove to machine, and thus should be used only when absolutely necessary. This can make them challenging designs when it comes to overfill. 812 . Besides the base and saddle, most dovetail slides have four other parts. 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. #2 of the top 5 problems that lead to Hydrodynamic Bearing Failure Historically, a common practice was to design Babbitted bearings with dovetail grooves. groove walls provide compression stop. O-rings used as Boss Seals can withstand much higher application pressures because the threaded hardware mates to eliminate a clearance gap.