The critical design point to keep in mind is homogenous rubber acts like a highly viscous fluid. The O-ring is also axially squeezed in a dovetail groove. A common mistake is to design the groove width to “pinch” the o-ring cross-section, so it is held in the groove. 1870: 2. Bitte beachten Sie, dass einige Ihrer ausgewählten Parameter Einfluss auf die Größenauswahl haben. 4 µm Ra) groove sides: X = 63 micro inches (1. 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. Dovetail o-rings come in a wide variety of widths, diameters, cross-sections and corner radii. 99mm O-Ring Size 3/8 Shank 2-1/2 Over All Length Solid Carbide O-Ring Dovetail Cutter ID 8362-. Please contact Greene Tweed engineering for help or advice if required as some applications are difficult to optimize both at ambient and operating temperatures. O’ring Groove Design. This document covers the basics of O-Ring sealing, elastomer properties, and dynamic and static design criteria. Dovetail O-Ring Groove Design Learn More About Dovetail Groove Design for O-Rings . 53 - O-Ring Dovetail Groovers. 070". o-ring cross-section o-ring diameter dovetail gland cl diameter (f) nom tol +/- nom tol +/- nom tol +/-dovetail gland and o-ring width and depth default recommendations dovetail gland and o-ring diameter default recommendations-005 0. 010" and . 1 at $210 and 2 at $165 each. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. 1-23) 2. In most new designs, the o-ring is the first typeThe straight wall on a half-dovetail is going to have better characteristics in that direction, since o-rings tend to get "blown into the gap" by the pressure they're sealing. This feature article analyses an O-ring in a dovetail groove by using the finite element method. An O-ring is a circular cross-section ring molded from rubber (Figure 1-1). 1 out of the 3. Surface finishes up to 64 to 125 RMS with no burrs, nicks, or scratches are recommended. 2 or 3 flute. Days: 6 Days. 1 at $250 and 2 at $180 each. , at the hardware and O-ring tolerance stack-up) and the smallest possible O-ring in the largest possible groove. The result will be that the ring will extrude itself under that temperature cycle. As well as the chemical volume swell or shrinkage of the O-ring. Dove Tail Cutter 2-Flute for O-Ring. Trapped volumes caused by unvented single or double dovetail o-ring groove designs. Dovetail and Half-Dovetail Grooves . The O-ring is also axially squeezed in a dovetail groove. This recommended practice provides the design criteria for static elastomeric O-ring seals used specifically in engine and engine control systems. . The wall inclination creates a groove with a trapezium cross-section,. com• 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. Dovetail scope rings for 3/8" or 11 mm,the ring is for most scopes which are in 30mm scope tube ; 11mm Dovetail scope ring Base Designed with Locking Hex Screws to Tightly Fit on Mounts with 11mm Dovetail Dimension ; High profile scope rings (item height:2"),the height from the center of the scope tube to the picatinny base is 1. Check the diameter, wall angle, corner radius and O-ring standard specifications. 9-2 Parker Hannifi n Corporation • O-Ring Division 2360 Palumbo Drive, Lexington, KY 40509 Phone: (859) 269-2351 † Fax: (859) 335-5128 Sizes Parker O-Ring Handbook Sizescapacity and at the same time a groove for lubrication, which is very favorable for ®dynamic sealing. 4-18 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-Ring Handbook For Internal Pressure (outward pressure direction) dimension the groove by its outside diameter (H ) and width: O (H ) = Mean O. Parker Hannifin O-Ring & Engineered Seals 2360 Palumbo Drive Lexington, KY 40509 Ph: 859-269-2351 Fax: 859-335-5128 oesmailbox@parker. 005". Ozone Attack. 300”. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. Check the diameter, wall angle, corner radius and O-ring. From milling out some multi-flute carbide-tipped cutters with one of our own Dexi-Dovetail cutters, to securely holding blanks with our own Accu-Hold endmill extensions. Groove widths . These O-rings have cross sections of 0. Box 80430 Fort Wayne, IN 46898-0430. O-ring dovetail cutters are held to specific standards to cut a groove that is wider at the bottom than the top. 70 - Long Length Single End Split Blanks. Apply glue to the faces of the pins and the groove for the bottom. Create dovetail grooves that allow O-rings to flex without falling out of place. 150" in . This offering of Parker Hannifin O-Ring Dovetail Cutters WITH Drop Hole Allowance is designed for milling a full dovetail groove, and is engineered to align with the standards. 005 0. Because of the difficulty in creating the groove and tight tolerances required, this type of seal application should only be used when necessary. Learn the basics of O-Rings and Back-up Rings from Trelleborg, a leading global supplier of sealing solutions. . Undersized Cutter Design Allows Climb Milling Both Faces of Groove for Improved Finish. Cutters for machining grooves by side running have a dovetail groove shape. After machining the "reachable. Neck diameter is measured to the theoretical sharp corner. , Japanese JIS, British BS, or Common Metric sizing for o-rings, these o-ring size charts will help you locate the right o-ring size. Dovetail; O-Ring Sizes. • Easy to use • PDF output • Saving of your designs Dovetail Cutters-O-Ring Slotting End Mills Harvey Tool's fully stocked selection of O-Ring Slotting End Mills are optimized for machining O-Ring grooves, and feature a . To create a retaining-ring groove, click the Retaining Ring Grooves tab. Presumably a full dovetail would be used when pressure needs to be held in both directions, so the o-ring has no preferential sealing direction (and the groove can have. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC. 2. For a face seal: a compression ratio of 20-30%. A Dovetail provides a retaining feature in a face seal gland. O-Ring Compression (%) Groove Depth incl. EIKOSHA×Dedicated Cutters; EIKOSHA×Machining tools; Simultaneous O-Ring Groove Compliant Dovetail Grooving and R Chamfering, Powdered High-Speed Steel, TIALN Coating. 10. machined using a special dovetail cutter which is available from Spira. The gland — usually. rubber some place to go when squished. Parker Hannifin O-Ring & Engineered Seals 2360 Palumbo Drive Lexington, KY 40509 Ph: 859-269-2351 Fax: 859-335-5128 oesmailbox@parker. Available in four original standard sizes and in customized sizes, the DT Collapsible. The proper o-ring size is a fundamental aspect of proper o-ring performance. 001" increments. groove with a Standard Face Grooving Insert the width of the top of the Dovetail Groove. However, installing an O-ring into these grooves can be tricky without proper technique. 33 mm thickness by 20 %, approx 5 N per mm of sealing length is required for a hardness of 70 Shore A resp. Diamond Seals. 142". 쿼드링은. 070”, . Purpose – This paper aims to investigate the suitability of additive manufacturing to produce O-ring seals. Try not to get any glue on the edges of the top, as it should float freely in its groove. These stock cutters conform to the standards suggested by the Seal Division of Parker Hannifin Corp. B. C-3 Gland Dimensions. Set up your expressions for user inputs and run it through the UDF wizard. However, installing an O-ring into these grooves can be tricky without proper technique. 222 0. O-Ring Groove. Download PDF . Grooves. , the THINBIT GROOVE ‘N TURN line includes Dovetail grooving inserts and Static O-Ring Grooves. O-Ring Size Charts O-ring, x-ring and square ring size charts. For standard O-ring grooves in the face and radial applications, we recommend 60-90% gland fill. 5000: $71. For rotary O-rings: a compression ratio of 0-10%. These loose gaskets at the I. 139 inch (3. Volume fill is the O-ring volume divided by the gland volume. 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. Designed for milling dovetail grooves for sight attachments, this fully stocked Harvey Tool product offering of Sight Groove . 쿼드링은 사각에서 씰링 역할을 하므로 압력의 부하분포가 고르게. 002: Milimeters +. Ph: 859-269-2351. Before choosing a profile, you have to. O-Ring & Engineered Seals. Speeds & Feeds Product Table: Dovetail Cutters - Parker Hannifin O-Ring Dovetail Cutters Series: 238xx, 239xx, 563xx. If the groove design in illustration 4. Manufactured by Kaiser Tool Company, the Groove ‘N Turn line includes dovetail grooving inserts that machine O-ring dovetail grooves with 66-degree undercut angles. Popular O-Ring Material Comparison Guide; FFKM Kalrez® O-Rings Material; FFKM Markez® O-Rings Material;. , at the hard-ware and O-ring tolerance stack-up) and the smallest possible O-ring in the largest possible groove. 6 μm Ra)How to Mill a Dovetail in Fusion 360! Use these easy tips to define a toolpath that navigates semi-tricky dovetail geometry. There are cutter shapes that machine the O-ring shape by plunging, and cutter shapes that machine grooves transversely. Create dovetail grooves that allow O-rings to flex without falling out of place. Note: do not remove the part from the mill between making the fly-cut and milling the groove. E. 005 0. This feature article analyses an O-ring in a dovetail groove by using the finite element method. The insert design is optimized for strength by utilizing an insert pair to generate the groove form. To compress an O-ring of 5. C. GROOVE 'N TURN® dovetail grooving inserts are used to machine O-ring dovetail grooves with 66° undercut angles. The art has long recognized that a properly propor tioned dovetail groove or O-ring seal is the ultimate in design and effectively eliminates all the shortcomings found in conventional O-ring grooves and eliminatesFailure pattern: Typical of high-pressure systems, this pattern can be identified by the many small bites or nibbles taken out of the O-ring on the low-pressure (downstream) side. D. Static Radial Glans Design Application. It also provides detailed tables and charts for various O-Ring sizes, materials, and standards. Calculated Values at Centrical Position of Rod: info O-Ring Compression (%) info Free Groove Volume (%) O-Ring Inner Diameter Stretch (%) info Results at Service min. O. Choose from our selection of groove cutters, including over 700 products in a wide range of styles and sizes. tool # diameter minor dia groove depth top radius bottom radius flutes o-ring size shank dia overall length 1 pc 2-10 11-25 26-100; 51-8010: 0. World Class; Certifications; Contact Us; Call Us: Seal & Design Canada: Toronto, Ontario (416) 741-7005 Toll Free: 1-866-242-3770. DOVETAIL O-RING FACE GROOVING INSERTS " " " Style 6 Shown FRONT RAKE: Primary 10° honed, Secondary 15° BACK CLEARANCE: 24° one side SIDE CLEARANCE: Depends on major diameter RADIUS: On 24° side only TOP RAKE: 0° LEAD ANGLE: 0° Notes: • For best performance, form undercut by profiling. If excessive clearance is created, extrusion will result. Es ist daher am besten, hier zu beginnen. An undercut or dovetail groove has proven beneficial in many applications to keep the o-ring in place. U. Very shiny, easily a 32 and good luck measuring the surface finish. . 1、Application：Dovetail Grooving 2、Materials: Steel、Stainless Steel 3、Customized designing acceptable cwtools@cwprecisiontools. • Holds spiral in place. 050Buy Harvey Tool Parker Hannifin O-Ring Dovetail Cutter, 0. g. Proudly made in the USA by AB Tools, Inc. O-Ring Groove (Gland) Design Guide. 243" Groove Wd. Static Male and Female O-ring Seal Design; Face Type Seals; Dovetail and Half-Dovetail Grooves; Boss Seals; Failure Modes; Mobile inPHorm -. Under high pressure the O-ring is forced to the side of the gland – away from the pressure. Calculated Values at Centrical Position of Rod: info O-Ring Compression (%) info Free Groove Volume (%) O-Ring Inner Diameter Stretch (%) info Results at Service min. Parker Hannifin2360 Palumbo DriveLexington, KY 40509Ph: 859-269-2351Fax: 859-335-5128 oesmailbox@parker. Details. Adheres to standards specified by the O-ring division of Parker Hannifin CorporationApplicationsUsed for milling half or full O-ring dovetail grooves WITHOUT a drop hole allowance. 156 endmill to cut the groove. . Proper O-ring Face Seal (ORFS) fitting assembly and installation steps: Step 1: Inspect the tube end for a O-ring. This one will be ma. The result will be that the ring will extrude itself under that temperature cycle. Find your exact metric o-rings and easily order online from the world’s largest metric o-ring inventory. It is often necessary to provide some mechanical means of. dovetail or half-dovetail grooves, are encountered but are much less common. Refer to the O-Ring Handbook or consult a Parker applications engineer for assistance in sizing O-rings to dovetail glands. Gland Design for Static Application for O-rings with Radial Squeeze Industrial Radial Glands INCHES. 001" increments. This can be done by using a dovetail groove. 6% - compressed by max. 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. 5. CNC ground in the USA. Retaining Ring Groove. , Japanese JIS, British BS and Common Metric o-ring size charts. Endplates - Dovetail O-Ring Grooved Flange. Face seal o-rings pop out easily, yeah. My part was manufactured by a machine shop. Designed to the Standards Suggested by the O-Ring Division of Parker Hannifin Corporation (ORD 5700/USA, ORD 5700) Designed for Milling Full Dovetail Grooves with Drop Hole Allowance. thermal expansion of the groove and the O-ring. com Tool's fully stocked, ready to ship offering of Dovetail Cutters take into account a variety of included angles, lengths of cut, and corner radii, allowing you to choose the exact dimensions needed for your difficult dovetail groove cuts. WEAR-Lok Seals. $120. Shipping. The O-ring must have room to expand laterally in the groove due to axial compression. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during. Title: 14 O-Ring Dovetail Cutters Metric Author: Larry-PCLarry (LARRY-PC) Created Date: 10/2/2017 11:23:46 AM. In radial grooving, the groove is cut perpendicular to the axis of the workpiece, effectively radiating out from the center of a cylindrical part. 139 . The high component value and complexity make process security essential. Parker's H-seals are designed for as cast or machined grooves and can be retrofitted for standard O-ring groove sizes. Wider outlet drainShown: Static O-Ring Insert in Right Hand Toolholder . For static o-ring grooves. For a static male to female mating interface: a compression ratio of 18-25%. Days: 6 Days. Note: the data. 001/. Endplates, also known as top plates or baseplates are available in 304SS or 6061-T6 Aluminum. Create dovetail grooves that allow O-rings to flex without falling out of place. A dovetailed o-ring groove is probably overkill for this application; I'd just mill it with a straight endmill and then use Vaseline to hold the o-ring in place during assembly. 000 for all sizesThe perfect O-Ring for each purpose. , Japanese JIS, British BS, or Common Metric sizing for o-rings, these o-ring size charts will help you locate the right o-ring size. You can add industry standard O-ring and retaining-ring grooves to your cylindrical model. All shanks have lockdown flat for faster setups. No. The angled groove walls are an effective way to retain the seal, because the walls essentially pinch the seal, holding it in position. Conversely, when designing systems which seal equipment from external pressure, the groove's inside diameter (ID) is primary. P. The Feedthrough Collar can be used with our line of Pyrex or Metal Bell Jars, Service Wells, and Endplates. 3620 Centennial Dr. 005: 0. Groove,Turn and Parting Off; Taps; External Turning ; Internal Turning; Thread Turning; Welding & Soldering. Free groove volume. This can make them challenging. Fort Wayne, IN. 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. round profile, the o-ring would have no choice but to extrude into. Check the diameter, wall angle, corner radius and O-ring standard specifications. The results of this analysis show that compared. Made of solid carbide, they are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. When machining this groove, a standard o-ring groove must be machined first. Dovetail groove geometry is a bit of an art. By simply entering installation specifications for an application, it recommends O-Ring sizes, housing layout and corresponding part. EIKOSHA Starting from: 136. 139 inch (3,53 mm) and bigger. Dovetail grooves are used to hold the O-ring in place on a face seal groove during assembly and maintenance of equipment. Visit our groove design page for additional information on measurements for O-ring groove depth, width and radius. (fig. For a rod (shaft) seal:O-Ring Max Groove Diameter = Min Shaft Diameter + (2 x Recommended Gland Depth) b. 1. 0510: 0. a lid which opens regularly. To create a retaining-ring groove, click the Retaining Ring Grooves tab. Dovetail joints are commonly used in furniture creation, thanks to their inherent resistance and tensile strength. O-ring calculator with complete design analysis. DOI：. For O-ring grooves. To facilitate assembly, the diameter of the O-ring groove is usually selected somewhat larger than the diameter of the O-ring. This is beneficial for special applications where the O-ring has to be fixed by the groove e. In the Expressions, you can make a list of which standard grooves you want to use, and list those in the UDF wizard. Dovetail Insert Styles. Dovetail grooves are incorporated into a design to help hold the O-ring in place during installation and maintenance. Modifications to. Our O-Rings are both cost-effective and perform highly in almost every environment. Dovetail Half - Bay SealFax: (916) 993-3949. O-ring dovetail cutters have an included angle of 48°. 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. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. John R. This combination of features demands specific machining parameters to avoid breakage. The dovetail groove has inclined sidewalls, making it look like a dovetail, hence the name. g. Face seals can seal internal pressure, external pressure, or both. O-ring groove design is a key consideration in the o-ring selection process. Available in ½", 5/8", ¾" and 1" diameters, the toolholders have a 1. Have a look at the attached sketch. Very shiny, easily a 32 and good luck measuring the surface finish. 070". The part as received leaks. In dovetail applications the O-ring is squeezed primarily in an axial direction, with a valve exerting force on the top and bottom of the O-ring sealing surfaces. Dovetail O-Ring Grooves Inspection I am new here so, hello all. For a rod (shaft) seal:O-Ring Max Groove Diameter = Min Shaft Diameter + (2 x Recommended Gland Depth) b. 002 on the floor for the dovetail tool to finish the bottom and have no mismatch. Select a standard, groove type, and available groove size from the lists on the top left of the tab. Use our o-ring size chart to find AS568 standard o-ring sizes by cross section, inside diameter, and outside diameter. Data sheet. The calculator takes all relevant parameters into account like: O-Ring squeeze. Click Grooves (Toolbox toolbar) or Toolbox > Grooves . All are made with premium carbide to optimize strength and durability, giving you the longest life and best finish on hard metals. 8 μm Ra)Harvey Tool's fully stocked, ready to ship offering of Dovetail Cutters take into account a variety of included angles, lengths of cut, and corner radii, allowing you to choose the exact dimensions needed for your difficult dovetail groove cuts. 060, . Parker O-Ring Handbook - ORD 5700 pdf. This is an expensive groove to machine, however, and thus should be used only when. Made of solid carbide, they are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. 05 6 M4 x 10 SHCS 4 R Location of plate groove determined by mold designDovetail O-ring design. 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. 1 at $210 and 2 at $165 each. Bochnia. On the other hand, Super-O-Lube is an ideal all-purpose O-ring lubricant. com O-Ring Products. Made of solid carbide, they are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Ozone Attack. 125" and . Shipping. Learn about the factors that affect vacuum sealing performance, such as o-ring size, material, groove geometry, surface finish, and lubrication. Our O-Ring Dovetail. 070 0. These dovetail inserts can be used on conventional, Swiss-type and CNC machines. If the O-ring cannot resist increasingly high pressure, part of theGeneral Description: Nitrile, also commonly referred to as Buna-N or NBR, is a copolymer of Acrylonitrile and Butadiene. 83 € Min. 1. Solid Carbide Dovetail Cutters for Half Dovetail O-Ring Grooves. Same groove dimensions as our O-Ring dovetail cutters that match Parker Hannifin standards. Free CAD downloads, quick delivery, competitive pricing, and no minimum order quantity. All relevant parameters are taken into account, for example: Free groove volume. the O-ring compression depending on the cord diameter D2 and the application. DOVETAIL O-RING GROOVE DESIGN. Refer to the O-Ring Handbook or consult a Parker applications engineer for assistance in sizing O-rings to dovetail glands. O-Ring Compression (%) Groove Depth incl. Example: Tool #23921 machining a o-ring groove (without drop hole provision) to fit a AS568-204 seal in 4140 steel at 32 Rc 1. Tech Support. D. You may have to work on the placement in 3D space of the UDF upon creation. . Choose from more than 500. Metric Features: O-Ring Dovetail Cutters Solid micrograin carbide; A hard thing to fix with dovetail grooves is the expansion issue. This feature article analyses an O-ring in a dovetail groove by using the finite element method. This feature article analyses an O-ring in a dovetail groove by using the finite element method. To create a retaining-ring groove, click the Retaining Ring Grooves tab. 73 - Face Grooving Tools - Full Radius. Cutters for machining grooves by side running have a dovetail groove shape. This design is a customised and expensive method that you should only use when necessary and a temporary solution to keep the o-ring in place. This trapezoidal groove shape is designed to hold the O-ring and keep it. O-Ring volume. I'm having a heck of a time measuring all the features. For a static male to female mating interface: a compression ratio of 18-25%. Unfortunately, they are very fragile due to their trapezoidal profile of a large Cutter Diameter with. O-ring Groove Design in 3 easy steps: Step 1. See the Dovetail Groove Cutter data sheet for more information (page 36). Problem sources: Excessive gland clearances . Insert sizes are . . Manufactured by Kaiser Tool Co. Dovetail Cutters-Sight Groove Dovetail Cutters Solid carbide tool designed for milling dovetail grooves for Sight Attachments, and offered in 50° or 60° included angles. Then use the o-ring size chart to easily order online from one of the world’s largest o-ring inventory networks. Learn about the factors that affect vacuum sealing performance, such as o-ring size, material, groove geometry, surface finish, and lubrication. e. Otherwise, without these o-ring. The groove design allows the O-ring to be retained in the axial/face seal during assembly and maintenance. . . O-Ring can extrude into clearance gap or get squeezed in two directions. 0940: 0. Note that the dovetail groove becomes rectangular when the base angle a = 90°. Straight-sided grooves are best to prevent extrusion or nibbling. Abstract. MAJOR Ø PRICE AlTiN. The dovetail groove construction is only recommended for O-rings with bigger cross sections, . . 142". 70 - Long Length Single End Split Blanks. Dynamic O-Ring Groove Design Rod-Piston; Static O-Ring Groove Design Dovetail; O-RING MATERIAL GUIDES. 66° Included angle, 24° per side. Proudly made in the USA by AB Tools, Inc. The Linear Feed must be reduced to account for angular velocity (see example). Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent. oesmailbox@parker. Made of solid carbide, they are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. 070 . Features: O-Ring Dovetail Groovers Solid micrograin carbide ; For turning 24° o-ring dovetails; All shanks have two lockdown flats so you can flip the tool and cut both sides. D. For standard O-ring grooves in the face and radial applications, we recommend 60-90% gland fill. D. a lid which opens regularly. The O-ring must have room to expand laterally in the groove due to axial compression. Static Axial Gland Design Application. 300", . According to the company, the insert design is optimized for strength by using a left/OD and right/ID insert pair to generate the groove. Dovetail Cutters-Parker Hannifin O-Ring Dovetail Cutters WITH Drop Hole Allowance 42 - Quick Change Face Grooving Tools. An undercut or dovetail groove has proven beneficial in many applications to keep the o-ring in place. If GD&T is used and/or critical, I would suggest using profile tolerance. 002-006 0. A few of the most commonplace uses for a dovetail joint (and therefore a dovetail cutter) include: • Furniture, such as drawers, cabinets, shelves, etc. ©2021 Kaiser Tool Company, Inc. In milling the groove, a regular o-ring groove using the dimensions of “W” and “L” must be made first, then finished up with a dovetail cutter. . MISUMI USA has all of your O-Ring Groove Cutters needs covered, with over 3. (A) is shown as a radius rather than a diameter. O-ring calculator with complete design analysis. The inserts are for machining O-ring dovetail grooves with 66° undercut angles. O-Ring Compatibility O-ring compatibility information for. of an O-ring gland is mainly influenced by diameter of the mating surface of the rod or piston and bore.