amazon_ad_height="90"; April-15-2005 amazon_color_link="206BA2"; Inboard Prop Sizing: Allow the experts at Propeller Depot to complete your free inboard … This factor must also be considered in giving some gap. It is also due to the fact that training material is not available to the junior engineers when they join this field and by the time they come up the ranks they are used to the idea of wrong working practice. Sometimes in sea water pumps when the packings are not coming out, a little opening of the sea water suction valve would push out the packing with ease due to the water pressure. “Avoid measuring a used packing ring as a reference to cut a new ring,” Gillette says. amazon_ad_tag="nhknives-20"; From the information I've found thru BOC and Marine Hardware (supplier of running gear to Bayliner) you need 1/4 inch squar cut at 30* and 3 rings and cuts offset of each other,making sure to remove all packing......Hope this helps....Brad For example if the shaft is of 50 millimeters diameter then the circumference is given by the formula P = Pi x Diameter. … { } Normally engineers just check the size and put the first packing they come across if it is of the same color. It is most likely 5/16" but could be 1/4" or 3/8", if you back off the packing nut completely so that you can see the end of the stuffing box you can measure the space between the inside bore of the packing gland and the shaft. • Far easier and therefore less expensive installation. The selection of gland packing is a very important part of the marine engineer’s job. I don't pay attention to measurements or what it says on the package. Usually, I take the old packing to the store, physically match it to the nearest size and buy a bunch of that. { } Measure GFO Marine Shaft Packing Size. In this article the subject has been discussed in brief and it is hoped that it would be useful to the new marine engineers as well as the practicing marine engineers. Now is a good time to polish the shaft with some wet/dry sandpaper. function go1() } location = document.selecter6.select6.options[document.selecter6.select6.selectedIndex].value if (document.selecter5.select5.options[document.selecter5.select5.selectedIndex].value != "none") HVAC: Heating, Ventilation & Air-Conditioning, How to Select Gland Packing for Different Applications, How to Measure the length of the Packing Required, This post is part of the series: A Guide to Gland Packing, https://www.roymech.co.uk/images/gland_packing.gif, https://lh6.ggpht.com/_rD7JWhpQBzk/Sf28xL_w-lI/AAAAAAAAAkU/mymqhM3aNCU/Gland+packings%E6%B8%85%E9%99%A4%E5%99%A83.JPG, Commercial Energy Usage: Learn about Emission Levels of Commercial Buildings, Time to Upgrade Your HVAC? (adsbygoogle = window.adsbygoogle || []).push({}); The following are the cautions and the instructions while installing new gland packings. It must also be noted that over tightening the gland also leads to premature wearing of the shaft sleeves. The packings must be selected as per the service required. A valve is only good if its sealing is good and a leaking sealing arrangement amounts to a leaking valve with all its associated faults. Call Us – with your application and sizes or send us a seal request 1-877-499-2011 Working Height B … { Have prop shaft out, gland apart. It is safe to do this as the packing will stay in place … Just measure distance between A and B. amazon_ad_logo="hide"; { Click on the links below to view the OEM shaft replacement guides for each of the major manufacturers in the industry. There are also gland packing extractors available in the market, which look like a cork screw used to open the wine bottles but are flexible. Check that the shaft is free to rotate after the insertion of the gland packings. Start by measuring the distance from the horizontal mounting point on the bow to the waterline, then add 20" to this measurement. Once you determine the correct size, write it down in your maintenance log, or somewhere. } } }. The figure obtained must be divided by 2 to get your gland packing size. Slightly tighten the gland till a little resistance is felt in the turning of the shaft by hand. With few exceptions, these are specifically matched to the shaft diameter, a 2-inch shaft, for instance, utilizes three 3/8-inch packing while 1-1/2-inch shaft utilizes 1/4-inch packing. { amazon_color_border="206BA2"; A heavy duty engineer’s knife or a sharpened ordinary knife would do. Removing a gland packing can be very tough sometimes, especially if it is old and well set, you need to have specially contoured tools which the marine engineer learns well to make with experience. function go3() After the gland packings have been removed the spaces must be thoroughly cleaned with compressed air to ascertain than no residues of the old packing remain inside. The problem comes when the old packings have lost their properties and the packing comes outs in fibers. In some cases the shafts have even broken due to excessively tightened packing. Estimating 2 food deep there will not be much water incursion, in fact water was pouring in with packing in place. These seals require lighter packing pressure than standard oil- and water-resistant packing seals, so they cause less friction and reduce shaft wear. In case it is not possible to smooth the surface, the sleeve must be changed at the next possible opportunity. I should just measure the gland and forget measuring the packing. It's compressed and I don't see any marking anywhere. Braided flax fiber that has been thoroughly lubricated with tallow & wax. I've replaced packing countless times. Also sometimes the packings do not go in the stuffing box spaces easily and they have to be hammered to make them a little thinner thus elongating them in return. Things we have learned over the years when using conventional packings are: When good and easy access is limited or difficult, NEVER USE the nut-type glands as the adjustment requires two-hands … Ditto the drill bit. Radial Lip Type – Size by shaft, O.D. or bore and width. For shafts of size 50 to 75 mm diameter the gland packing of size 12.5 mm is used What size flax packing do I need? Before you get started, you will need a couple of wrenches to loosen and tighten the nuts. An incorrectly selected gland packing would soon fail in service and lead to leakages. If the packing is too big, you squash it a bit so that it will fit into the housing. What part of GALE WARNING did you not understand? amazon_ad_link_target="new"; amazon_ad_logo="hide"; You’ll either have to unpack the truck entirely to exchange it for the next size up, or arrange alternate moving … A common mistake is winding the new … Prop Guide:Use our revoluntionary boat propeller guide to find the perfect boat prop for your outboard, stern drive, or ski/wake marine engine. The packing rings need to reflect the size of the shaft. function go2() The special lubricant and packing eliminate the need for water to lubricate and cool the rotating shaft. amazon_color_logo="FFFFFF"; Determining the tip thickness of a golf club shaft is important when installing a new shaft in a clubhead. I want to install gore packing on my shafts. Get the store that sells the Gore packing to send/lend you a small sample to check the fit. Going one size to big can eventually wear a groove in the shaft and one size to small will never seal properly. I've replaced packing countless times. if (document.selecter4.select4.options[document.selecter4.select4.selectedIndex].value != "none") To determine the right length for your boat, measure the distance from where the shaft is mounted on the deck or the transom to the water. You guys are right. } Propeller Guide: Utilize our best in class boat propeller guide to find the correct propeller for your Outboard, Ski/Wake, or Stern Drive marine engine. Gland packings are made of the combination of the materials discussed earlier and are manufactured in plaited, braided, twisted, jacketed, corrugated foil, foil wrapped deformable core, and full foil form. As a number of packings are available, the field of selection is very wide. Whatever size the item or package will be when it’s shipped will be what you input here, including any extra padding or wiggle room you choose to have. Re: drill bit measurement: be sure shaft is centered or readings w/b different around diameter of shaft. function go5() This negligent attitude results in leakage and scored shafts. Many sail boats have a 1 1/4″, 1 1/8″, 1″ or 7/8″ inch prop shaft and a piece of scrap dodger tube, in your shaft size, works great as a cutting jig for new packing rings. Packing Size Packing Length Price ; ULTRAX125-1LB Duramax Ultra-X Packing: 1/8 inch: 67 feet: $85.00 $66.99. Boat Drive Train, Shaft Packing & Stuffing Boxes. At the end of this message is a link to 38AFT spec sheet. amazon_ad_width="728"; location = document.selecter1.select1.options[document.selecter1.select1.selectedIndex].value Put the new gland packing on the shaft circumferentially or on a template and then mark and then cut the required length. They’re made of graphite-impregnated aramid fiber and are for use in pumps and valves. The size you need depends on the space between the shaft and the inside of the hollow packing nut. Keep monitoring the temperature of the gland and if it is getting too hot slacken the same amount. Okay, here is a really basic one. } amazon_ad_width="728"; Knowing the tip thickness will determine whether or not the shaft will fit appropriately into the hosel of the clubhead. As a rule hammering should be avoided as it damages the gland packings and should only be resorted to in an emergency, when the correct size packing is not available. Inboard Propeller Sizings & Prop Guide for Outboards, Sterndrives, and Ski/Wake engines. The shaft must be carefully inspected for any abrasions and pitting marks and if any must be removed with 300 grit emery paper. The gland packing should be cut with a sharp knife to avoid fraying of the edges. (Inside diameter of shaft log - shaft size)/2; or use Bill's idea and measure with a drill bit. Its easy to determine which size GFO fiber packing you need. Inboard Sizing: Choosing the right propeller for your boat requires several pieces of information to allow us to give you the best suggested propeller size for your boat and engine … Compress with the gland to ascertain that it goes inside evenly. Please remember that a little leakage of about ten drops a minute is required for the lubrication and the cooling of the gland packings. As an example scenario, let’s say you’re selling movie poster One Sheets – laid out, these posters are 27″ wide, 41″ tall, and 0.01″ thick. Simply measure the inner diameter of the bore of the stuffing box and subtract from it the outside diameter of the shaft. Bill said, I for one think that's worth a twenty. Gland packings are used extensively in the marine field yet they are one of those things that engineers take for granted. When you have the boat laid up in the off season, get a couple wrenches the proper size, and make sure you can crack the jam nut loose. Packing the drive shaft stuffing box; If this is your first visit, be sure to check out the FAQ by clicking the link above.