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A stuffing boxalso called a stuffing gland packing gland or packing boxforms a seal between the prop shaft and the hole in the hull through which the shaft passes while allowing the shaft to turn freely. The shaft is sealed by several layers of packing rings of asbestos in the past or cotton yarn pressed against the shaft by a gland follower.
713 has been described by Chain Paladino Ugolino Callow and Van Der Sluis 1954.
Marine stuffing boxes and packing glands. Marine Stuffing Boxes and Packing Glands Ultra X Stuffing Box Packing Replaces Flax Packing in Stuffing Boxes Ultra-X is a braided hydrophobic fiber packing. Because of its composition and design it lasts more than 5 times longer and outperforms all flax and PTFE packing in marine stern tube rudder and bulkhead applications. Marine Stuffing Boxes and Packing Glands How Does A Marine Stuffing Box Work.
A Stuffing Box is the oldest type of shaft seal from the first days of wooden boats and ships and the very first shafts that went thru the vessel hull. A stuffing boxalso called a stuffing gland packing gland or packing boxforms a seal between the prop shaft and the hole in the hull through which the shaft passes while allowing the shaft to turn freely. It consists of a threaded sleeve and a hollow nut through which the prop shaft passes.
Stuffing boxes are also called stuffing glands packing glands or packing boxes but they are really all the same thing. For illustrative purposes I cleaned the stuffing box of its oxidation and grime with my a stainless wire brush. 3W on the gland end of the stuffing box.
While this is common practice it should be noted that 3W on the pressure side and 2W on the gland end of the stuffing box can also be used. Please consult the Technical Department of your choice for the proper set up to best suit your application. The traditional method for keeping the propeller shaft watertight is the packed gland or stuffing box.
Rings of a soft packing material are placed around the shaft inside the gland nut. Three or four rings are normal for small and medium yachts with auxiliary engines. Various materials are used for the packing traditionally flax hemp and cotton.
Stuffing Box Gland Packing. Graphite cotton gland packing is a replacement for the old traditional graphite asbestos packing rope. The cotton material is impregnated with graphite and provides good long term seal solutions on most applications.
Boat Drive Train Shaft Packing Stuffing Boxes The drivetrain starts at the transmission and includes everything through the end of the propeller shaft including couplings drive plates the marine stuffing box and shaft packing or marine shaft seal the flex couplings the cutless bearing and more. When properly adjusted stuffing boxes are designed to leak slightly at two to three drops per minute while the engine is running and the shaft is turning. There should be no dripping when the boat is at rest and the shaft is not spinning.
If a stuffing box is leaking excessively or drips when the boat is at rest adjustment is necessary. The assembly is completed by a heavy-duty rubber hose that joins the stuffing box to a tube located in the stern. Clamps for this special marine hose are used to secure the hose in place and a solid installation is critical since a breakdown of this assembly results in volumes of water cascading into the boat.
Changing the packing material in a prop shaft stuffing box should be a simple 4-step task. Loosen the packing nut. Remove the old packing flax material.
Insert the new lacking flax material. Re-tighten the packing nut. I did my initial overviewanalysis of how my propeller shaft packing gland works in August of 2020.
That previous post has a discussion of the anatomy of the contraption and which. When screwing up the gland it is essential to ensure that the gland flange is parallel to the face of the stuffing box. If the gland is screwed up unevenly it imposes a greater pressure on the packing upon one side of the shaft causing a side thrust.
And if screwed up hard in. GW MORSE-TYPE STUFFING BOX PACKING TYPE STUFFING BOX Shaft Size Item No. Bronze 1 223 Bronze Chrome 1 227 Bronze 1-18 226 Bronze Chrome 1-18 230 OD.
Corrosion free pre-packed with beveled glands to force packing against shaft as it is tightened. But first we must understand the 2-3 basic types of shaft seals that you run into on a boat and what they are about. Well start with a packing gland style and a little history of them.
The first two pics below show what is properly described as a packing gland and also sometimes referred to as a stuffing box. Subscribe for more tutorial videos. Httpsbitly2K2hBriTutorial for how a sailboat shaft packing gland works how to open it and how to repack it.
Marine Stuffing Boxes And Packing Glands Propeller Shaft Rubber Seal Kit 828254. A Johnson heavy-duty stuffing box is engineered and built to seal out seawater and give unmatched protection for your propulsion system. Its robust construction highest quality alloys and precision machining gives it the ability to withstand long service life at sea.
Its not uncommon for a Johnson Heavy-Duty Stuffing Box to last the life of the. Since writing this I have conducted extensive temperature testing of packing glands with a fixed temp probe mounted directly to a traditional bronze stuffing box. The digital temp display was mounted in my cockpit.
What I have learned is that packing gland temperatures can be anything but static. Buck Algonquin Spud Only for Packing Box. Buck Algonquin Stuffing Box Hose.
Duramax Ultra X Packing. Duramax Ultra X Packing 5 Long. Lasdrop Elite Shaft Seal.
Stuffing box Packed-gland seal The stuffing box Fig. 713 has been described by Chain Paladino Ugolino Callow and Van Der Sluis 1954. The shaft is sealed by several layers of packing rings of asbestos in the past or cotton yarn pressed against the shaft by a gland follower.
At high stirrer speeds the packing wears quickly and. No grease no messJust cut into 2 to 3 pieces to length the length to make one wrap around your shaft to form the rings and install them in the shaft stuffing boxMake maybe one adjustment to the packing gland following a short run-in and never tinker with the stuffing box again. Youll rarely need to make any adjustments and the Gore dripless packing will last for years.