150" in . The light blue faces in the following image represent a groove. For applications requiring more than two or. 5 was of a standard face seal, the o-ring would fall out as the valve cycles up. The O-ring calculator calculates the most relevant size O-ring for any given groove. Included Angle 7°, . Here's the groove. MAJOR Ø PRICE AlTiN. Abstract. Download it for free and enhance your knowledge of sealing technology. Ball shaped Dovetail shaped Vulcanized. The extra void space in the design allows the O-ring to swell slightly due to thermal expansion or. 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. For rotary O-rings: a compression ratio of 0-10%. Groove Diameter (A)Your o-ring will stretch as much as the groove ID is. 015: 1: $68:. The insert design is optimized for strength by utilizing an insert pair to generate the groove form. This can be done by using a dovetail groove. , Tube Fittings Div. Historical. Insert sizes are . For a rod (shaft) seal:O-Ring Max Groove Diameter = Min Shaft Diameter + (2 x Recommended Gland Depth) b. Free groove volume. Design Chart 4-2 and its accompanying Design Table 4-2 (available by clicking on the chart image at the bottom of the page) give one set of dimensions for static O-ring seals when the configuration is similar to a piston or rod application with no motion involved. 243" Groove Wd. 210 . AS568 O-RING SIZE REFERENCE This Global O-Ring and Seal Size Reference Guide covers the Aerospace Standard AS568 O-Ring Sizes published by the Society of Automotive Engineers (S. For O-ring grooves. Milling the o-ring groove for the cross slide guard. 100”, . I have a part drawn in Master Cam X. 49 USD. When installed, the O-ring should be - stretched by max. A while back I had some 5/16 deep custom oring grooves in Nitronic (worst material ever). Groove widths less than . A virtual leak is a trapped volume of gas connected to the vacuum side of a chamber that can not be pumped out easily due to the restriction in the path connecting the trapped gas volume to the chamber volume. Create dovetail grooves that allow O-rings to flex without falling out of place. The O-ring is placed in the groove and a second flat surface compresses the O-ring. 70 - Single End Split Blanks. Choosing the Geometry You Need. The angle of orientation usually lies between 60° and 90°. . Free groove volume. Groove widths . Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. 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. Square Rings can be used in static applications where high sealing load force is required or when the sealing area is too thin to accommodate anything else. The o-ring is forced into the dovetail on installation, possibly tearing the o-ring. Parker O-Ring Handbook - ORD 5700 pdf. For standard O-ring grooves in the face and radial applications, we recommend 60-90% gland fill. The patented trapezoidal seal of the Seal-Lok tube end prevents the potential of O-ring fallout during shipment and assembly and O-ring pinch, both common issues for ORFS fittings. See Dovetail Groove Cutters for more information. the flange area when it is tightened. An undercut or dovetail groove has proven benefi cial in many applications to keep the O-ring in place. , Ltd. E. Choose from our selection of groove cutters, including over 700 products in a wide range of styles and sizes. For applications requiring more than two or. It is used in all types of applications and by a broad range of industries. View basic o-ring design guides for grooves, glands, depth, width, clearance, stretch, squeeze and more from Marco Rubber O-Ring specialists and buy onlineThe second table is for static industrial radial applications. Dovetail O-Ring Cutters 1/16 - 3/32 - 3/16 - 1/4 - 3/8 Standard Parker Hannifin - Special Sizes for Lathe Use. In an axial application, if the hardware is not able to achieve face to face contact with zero clearance gap, there are two potential impacts to the O-ring or seal. All shanks have lockdown flat for faster setups. EXAMPLE: The ORDER CODE for a left hand/counter-clockwise, . SPECIALS IN 4-6 WORKING DAYS. Cutters for machining grooves by side running have a dovetail groove shape. Recommendations are based on available technical information, and are offered as suggestions only, any reliance placed on such information by the user is strictly at the user’s risk. 178 0. 2360 Palumbo Drive. Dovetail grooves are a great mechanism for holding O-rings in place. The dovetail tool (custom) could only get in and out of the groove at 1 place (an entry location I ramped out to . This PDF catalog covers the design, materials, installation and applications of O-Rings and Back-up Rings, with detailed illustrations and tables. The inserts are for machining O-ring dovetail grooves with 66° undercut angles. 100" wide OD side insert in DURA-MAX® 2000, with a . 0700: 0. 005. Displays the diameter of the selected cylindrical face, or No selected diameter. of sleeves and at faces of glands can be avoided through the use of dovetail-type O-ring grooves (Figure 13-60), rather than conventional rectangular O-ring grooves. O-Ring Groove design plays an important part in how an o-ring seals. 2. . The square corners of an 0-ring grove give the. Inserts can groove, turn/bore and generate profiles. Now, another configuration is what I guess you can call an angled seal(?) configuration. If excessive clearance is created, extrusion will result. Inserts can also be. Number O-Ring Size Neck Ø TSC Neck Ø Over R Slot Depth Top Rad. Static O-Ring Groove Design Dovetail; O-RING MATERIAL GUIDES. 24° per side, 48° included. Designed to deform, the O-ring “flows” to fill the diametrical clearance and blocks any further leakage. Dovetail joints are commonly used in furniture creation, thanks to their inherent resistance and tensile strength. Solid carbide. 003 0. Groove widths less than . Endplates - Dovetail O-Ring Grooved Flange. This O-ring groove design diagram will guide you in selecting the proper gland depth and width. Once you find the right o-ring groove design you can easily order online from the world's largest. DT3/8-15. 1、Application：Dovetail Grooving 2、Materials: Steel、Stainless Steel 3、Customized designing acceptable cwtools@cwprecisiontools. When installed, the O-ring should be - stretched by max. 050O-ring Groove O-ring 을 설치하기 위해서, Groove 가공을 해야한다. 05 15% Instant SavingsFor dovetail grooves, match the centerline of the groove with the centerline of the O-Ring. 83 CAD Availability: In Stock to 10 DaysASA flanges, adapted decades ago from 150# steam-pipe flanges, are simple, sexed vacuum seals—one flange is grooved to accept an o-ring while the mating flange is smooth. Dovetail O-Ring Groove Design Learn More About Dovetail Groove Design for O-Rings . To help you maximize o-ring performance, this dovetail o-ring groove design guide provides default recommendations to find the perfect o-ring dimensions. · TiAlN coating is adopted for heat resistance and wear resistance. 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. Read-only properties for the selected groove. . The sizes are specified by the inside diameter and the cross. 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. For O-Ring Grooves > Dove Tail Cutter with Round Chamfering for O-Ring; Dove Tail Cutter with Round Chamfering for O-Ring. The light blue faces in the following image represent a groove. you may have to put this plane in a bit from the right plane. 057. 66° Included angle, 24° per side. 6. 이 형상외에 Half dovetail 도 있고, 더욱 특이한 형상도 드물게 존재한다. Endplates can be used in conjunction with our series of feedthrough collars, service wells, pyrex or metal bell jars, frames, and hoists. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC. . The Linear Feed must be reduced to account for angular velocity (see example). 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. A dovetail groove, however, is expensive to machine and thusFor Depths of Cut 2-1/2 to 3 times groove width. For O-ring grooves. Throughout this guide, the o-ring is used as an example in our discussion of seal design principles. Abstract. [Features] · Machinability is improved thanks to adoption of twisted blade. An undercut or dovetail groove has proven beneficial in many applications to keep the o-ring in place. 8 µm Ra) for vacuum and gases X = 16 micro inches (0. Dovetail O-ring groove designs are used quite widely and have a number of benefits for seal retention, and according to our feature last August, [14] can also reduce the potential for rolling, in dynamic applications. Dairy & Water O-Ring Groove Chart Metric O-Ring Information ASTM Specifications O-Ring Groove. 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. 275 - . For reciprocating O-rings: a compression ratio of 10-20%. An O-ring is a circular cross-section ring molded from rubber (Figure 1-1). Timelord (Mechanical) 15 Dec 08 16:29. Product Specifications. Male or Plug - the O-ring groove is located on a plug which is inserted into the housing or cylinder (fig. Optimized with a corner radius profile for extended tool life and finished groove profiling operations, Micro 100's right hand retaining ring grooving tools are designed for use in bores . Read Next Five Common Mistakes Shops Make with ER Collets (And How to Prevent Them) World Machine Tool Production and Consumption Modestly Down in. This can be done by using a dovetail. If adequate squeeze has not been applied. This Micro 100 OR product line of solid carbide O-Ring grooving tools CNC ground in the USA features a polished split face for improved edge retention and chip evacuation while reducing galling. Standard AS-568 size Rubber Square Rings can sometimes be used interchangeably in AS-568 standard size O-Ring gland designs. All of our. In this application, O-ring squeeze is primarily axial in direction (valve operation exerts force on top and bottom seal surfaces). Polished split face for improved edge retention and chip evacuation while reducing galling. The results of this analysis show that compared. Create dovetail grooves that allow O-rings to flex without falling out of place. 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. If adequate squeeze has not been applied. This tool is engineered with a polished split face for improved chip. For Depths of Cut 2-1/2 to 3 times groove width. The Standard design can be widely used to replace existing hydraulic packing and O-Rings without changing gland design. Square Rings can be used in static applications where high sealing load force is required or when the sealing area is too thin to accommodate anything else. 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. The male flange has a dovetail O-ring groove so that it actively retains the oring (it is actually pressed into the groove). 2360 Palumbo Drive. 101 0. The results of this analysis show that compared with rectangular grooves, dovetail grooves contribute to the enhancement of seal performance. Custom O-Ring Gaskets; Surface Mounted. It is the most common and most widely known type of seal in use today. METRIC O-RING GROOVE DESIGN. An. 065. 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. Excessive system pressure . Dovetail Groove Cutter. 139 inch (3,53 mm) and bigger. In fact, it would be easier to cut a double dovetail groove since a single would require a tool change while you might actually be able to get away with a single tool in the double dovetail groove if the tool was able to make a plunge cut to. EIKOSHA×Dedicated Cutters; EIKOSHA×Machining tools; Simultaneous O-Ring Groove Compliant Dovetail Grooving and R Chamfering, Powdered High-Speed Steel, TIALN Coating. I need to make a an o-ring groove that will capture the o-ring. Gland Design for a Static Application; for O-rings in Dovetail Grooves, INCHES. 002: Milimeters +. 2. 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. 036. 3% relative to the inside diameter Square groove dimensions The values and tolerances specified in the table apply to NBR Shore 70A O-rings. The compressed O-ring must have extra space within the groove without overfilling the groove. Made of solid carbide, these end mills are harder, stronger, and more wear resistant than high-speed steel and cobalt steel for the longest life and best finish on hard material. Volume fill is the O-ring volume divided by the gland volume. Therefore, the body is one of the most important considerations when designing an O-ring groove. 1/2. 오링은 내경 외경 두께에 따른 규격이 정해져있습니다. 050, . DSP Cable Groove; Solid Carbide, 1/8"Ø-1/4"Ø; Solid Carbide, 3/8"Ø-5/8"Ø; Solid Carbide, . Dovetail grooves are. . However, this is an expensive groove to machine, and thus should be used only when absolutely necessary. Note that the dovetail groove becomes rectangular when the base angle a = 90°. 30°, 60° and 45° angles. The O-ring must have room to expand laterally in the groove due to axial compression. 2. 0022. Female or Tube - the O-ring groove is located in the housing or cylinder and a tube is installed through the O-ring l. If you’re applying an o-ring to a face seal, you’ll better not use a face seal o-ring groove design, sometimes referred to as a dovetail. A schematic diagram of a dovetail, trapezoidal groove containing an O-ring is shown in Figure 1. However, installing an. P계열/ G계열/ V계열. Total clamping pressure on the O-ring due both to the effects of vacuum on the parts being closed, and the effects of bolts or clamps used with the O-ring, should be approximately 800 pounds per lineal inch of O-ring. AlTiN coating option for added lubricity and increased wear resistance in difficult-to-machine materials. 001" increments. Available standard or with inverted design. Male or Plug Seal design is based on the following factors (refer to fig. Surface finishes up to 64 to 125 RMS with no burrs, nicks, or scratches are recommended. O-Ring Size Charts O-ring, x-ring and square ring size charts. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. 24 Degree Per Side - 48 Degree Included 0. 191 0. 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. 70 - Double End Split Blanks. Mills Both Top and Bottom Radii. An O-ring must be squeezed and stretched for proper functionality. Proudly made in the USA by AB Tools, Inc. 103 . Male or Plug Seal design is based on the following factors (refer to fig. 057". b Groove outside diameter. 060, . The cross-section of the O-ring is seen as moderately arbitrary, as there are a few distinct advantages to either a larger or smaller cross-section O-Ring. Calculate squeeze of course as well. This SAE Aerospace Standard (AS) provides standardized gland (groove) design criteria and dimensions for O-ring seal glands for static and dynamic applications, and other seals. Contact Us eHome Dovetail and Half-Dovetail Grooves eHome O-Ring Basics Seal Types O-Ring Elastomers Static O-Ring Sealing Static Male and Female O-ring Seal Design. Neck diameter is measured to the theoretical sharp corner. 1993-06-11. Bore. Popular O-Ring Material Comparison Guide; FFKM Kalrez® O-Rings Material; FFKM Markez® O-Rings Material; FKM Viton® O-Rings Material; TFE/P Aflas® O-Rings Material; NBR Buna-N O-Rings Material;Dovetail Half - Bay SealAS4716. Tool numbers with US suffix have reduced neck diameters as shown in table. max. 005 0. Groove Depth Top Radius Bottom Radius O-Ring Size Shank Dia Shank Length 1 PC 2-10 11-25 26-100;. 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. . This is an expensive groove to machine, however, and thus should be used only when absolutely necessary. 1-24). 1350", (Pack of 2) (23814-C8): Dovetail Milling Cutters - Amazon. Special orders in 4-6 working days. For O-Ring Grooves > Dove Tail Cutter 4-Flute for O-Ring; Dove Tail Cutter 4-Flute for O-Ring. 0503 models BKL Technologies 1in Long Double Strap Dovetail Rings, 300 Series, BKL-301 (2) As Low As (Save Up to 21%) $31. Illustration 5. About 25% void space or 75% nominal fill. Dovetailed O-Ring Groove. D. 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 SizesAvailable Cross Sections for Encapsulated O-Rings & Groove Design Data. 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. Read-only properties for the selected groove. Specialty Profiles 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. Learn More > Contact. To avoid tearing or nicking, the use of o-ring lubrication is recommended while installing the o-ring into the dovetail gland. The groove must be designed to accommodate not just the o’ring size, but also its intended usage; be it dynamic or static operation, radial or axial loading, vacuum or high pressure. To create a retaining-ring groove, click the Retaining Ring Grooves tab. Slot Depth. 070”, . [Applications] · Use for O-ring groove machining at a 24° angle. g. 0510: 0. 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. D1 O-Ring Diameter. The calculator takes all relevant parameters into account like: O-Ring squeeze. The O-ring inner diameter (ID) should also stretch approximately 5% over your groove or gland. 030”, . This groove design is relatively uncommon as it is expensive to machine and should not be used unless absolutely required. Sometimes, a bit of interference can be designed between the outer diameter of the O-ring and the outer diameter of the groove. Availability: In Stock 5-10 days. 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. Bore. Thermal swell of the rubber material. Piston Seals for O-Ring Grooves Avoid common O-ring failure in dynamic applications— the square base. DOVETAIL O-RING GROOVE DESIGN. O-Ring volume. Analysis of a dovetail O-ring groove performance. Part Number. J1453/1_201906. Check the diameter, wall angle, corner radius and O-ring standard specifications. The dovetail tool (custom) could only get in and out of the groove at 1 place (an entry location I ramped out to . For a static male to female mating interface: a compression ratio of 18-25%. 1400: 0. The most important variable for installing an O-ring into a dovetail gland is making sure the seal is sized properly. Then use the o-ring size chart to easily order online from one of the world’s largest o-ring inventory networks. 00 Order Min - Shipping from $9. You probably need. Dovetail grooving inserts are used to machine O-ring dovetail grooves with 66° undercut angles. This one will be ma. When machining this groove, a standard o-ring groove must be machined first. . My part was manufactured by a machine shop. This can be done by using a dovetail groove. 1-30). Also known as shell cutters, these high-speed steel cutters are good for face and side milling. D3 Neck Diameter. O-Ring Compression (%) Groove Depth incl. Dovetail and Half-Dovetail Grooves; Simultaneous O-Ring Groove Compliant Dovetail Grooving and R Chamfering, Powdered High-Speed Steel, TIALN Coating. Choose whether you are working with existing hardware or designing new hardware. The following information is a guide for o’ring. Click swept cut tool, click the shape of the groove, then. 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. Using an appropriate tool entry method, specifically understanding when drop hole allowance is (and is not) needed, is important to keep common dovetail mishaps from occurring. A LEADING PROVIDER OF HIGH QUALITY O-RINGS, O-RING KITS & ACCESSORIES. This is beneficial for special applications where the O-ring. I need to make a an o-ring groove that will capture the o-ring. Review the general o-ring groove design considerations before moving onto the specific o-ring gland design type. As shown in above figure, an O-ring also gets compressed axially in a dovetail groove. Their extreme hardness means they are brittle, so a highly rigid setup, such as a CNC machine, is necessary to prevent. 1. Surface Finish X groove top and bottom : for liquids X = 32 micro inches (0. Male or Plug - the O-ring groove is located on a plug which is inserted into the housing or cylinder (fig. If you have a custom O-ring size that does not appear on this chart, contact us directly and we can help you size your O-ring gland design accordingly. RE: Dovetail versus half dovetail gland. Volume fill is the O-ring volume divided by the gland volume. 191 0. A while back I had some 5/16 deep custom oring grooves in Nitronic (worst material ever). Using the table above, determine the maximum recommended gland depth for your application. Center cutting. Installation steps Internal Grooving Lathe Tools for O-Rings. The dovetail groove construction is only recommended for O-rings with bigger cross sections, . Same groove dimensions as our O-Ring dovetail cutters that match Parker Hannifin standards. 22 Rifles and Rimfires - AC10380 Rifle Scope (19) $145. . Dovetail O-ring groove. 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. Welding Tables & Carts; Arc Welding Equipment ;. The O-ring must have room to expand laterally in the groove due to axial compression. Our basic stock compound list includes over 30 o-ring compounds making us one of the most diverse O-Ring Suppplier in the Global O-Ring market. Recommended surface finish: 16. d Optional construction for shapes and long straights. lip design, while still being able to replace o-rings without changing the groove. 23 Sealing Details / Elastomer seals Compression of O-rings source: Parker Hanninfin GmbH, Prädifa – Packing Divisi on EuropeSonkit (Shanghai) Industry Technology Co. 300" major diameter and a . This can make them challenging. Furthermore, the O-ring groove has triangular, rectangular, or dovetail shapes. With the O-ring calculator, engineers can specify the groove dimensions for a specific O-ring or a specific groove. [email protected]. For technical assistance with any of these alternate arrangements, please contact Dichtomatik North America. Harvey Tool's fully stocked selection of O-Ring Slotting End Mills are optimized for machining O-Ring grooves, and feature a . (A) is shown as a radius rather than a diameter. This is beneficial for special applications where the O-ring has to be fixed by the groove e. , Japanese JIS, British BS and Common Metric o-ring size charts. Carbide Dove Tail Cutter 2-Flute for O-Ring for Aluminum Applications. L1 O. Describes the groove. Select a standard, groove type, and available groove size from the lists on the top left of the tab. 375 No Drop Hole Provision ID 4185- Your Price: $185. thermal expansion of the groove and the O-ring. Learn more about dovetail o-ring groove design from Marco Rubber. The Standard O-ring groove is typically used in applications where there is a need for a static seal, such as in hydraulic systems. and O. Parker Hannifin Corp. For technical drawings and 3-D models, click on a part number. In the past all the o-ring grooves I machined were for static pressure using the Parker guidelines and the o-rings move around in those grooves. A. D. This is beneficial for special applications where the O-ring has to be fixed by the groove e. Dovetail grooves are used to hold the O-ring in-place on a face seal groove during during assembly and maintenance of equipment. This feature article analyses an O-ring in a dovetail groove by using the finite element method. Dovetail O-ring Groove in Mounting Flange; Downloads & Ordering. 178 0. 1. 또한 Groove 없이 Seal surface 에 접합되는 경우도 있다는걸 알아야 한다. This is an expensive grooveO-ring Groove Design in 3 easy steps: Step 1. Failure 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. 001" increments. -I tried the pocket function (standard pocket), clicked (chain) on the larger. 99mm O-Ring Size 3/8 Shank 2-1/2 Over All Length Solid Carbide O-Ring Dovetail Cutter ID 8362-. For static o-ring grooves. 1 at $250 and 2 at $180 each. 300”. Groove Bore Piston Rod Figure 1-2: Basic Gland49 votes, 22 comments. (fig. D2 (Shank) 12 16 25. For a bore (piston) seal:O-Ring Min Groove Diameter. this mimics the o-ring shape. Neck diameter is measured to the theoretical sharp corner. Our O-Ring Dovetail. . O-rings are measured in a variety of sizes. e. About 25% void space or 75% nominal fill. Female or Tube - the O-ring groove is located in the housing or cylinder and a tube is installed through the O-ring l. Commonly used materials are solid Inconel 718 and cladded Inconel 625, which are difficult to machine and add to the challenges. 375 Dia Carbide Dovetail Cutter Parker Hannifin Spec ID 16612-. 1-23). AS568 -004 through -475 Dovetail Seal Design Guidelines: AS-568 DASH # W O-RING CROSS SECTION: G GROOZE WIDTH: H GROOVE DEPTH: R1 RADIUS: R RADIUS: SHARPEDGE: ROUNDEDEDGE: Inch +. 054. 0. , 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.