Safety on the water consists of many factors, and one of the key elements ensuring the safety of your boat is high-quality fittings. Rum for the boat It's not just a decorative element, it's a functional attachment that makes it possible to moor, tow and crew safety when docking, and mistakes in selecting or installing this part can lead to the loss of expensive property or even create an emergency in the waters.
The modern market offers a wide range of fasteners, varying in design, material and installation. PVC inflatable boat owners and metal boat owners face different challenges when equipping their boats. In this article, we will discuss in detail what types of rump bolts exist, how to fix them correctly and what nuances to pay special attention to when buying.
Understanding the principles of this node will allow you to avoid common mistakes of beginners. The main load on the pomes falls at the moments of a jerk in chop or a sharp start of the tower, so the margin of safety should be multiple. We will consider the technical features of various modifications and help you determine the best option for your particular case.
Design features and types of rim bolts
The bolt is a metal ring embedded in a carved base, a classic design that has been used in shipbuilding for centuries. The main difference between modern models is the geometry of the ring and the way it is fixed in the boat hull. For inflatable vessels, it is critical that the adjoining surface is smooth, without sharp edges that can damage the balloon.
Depending on the purpose, the dice fall into several categories: there are models for permanent installation, which are mounted "deadly", and removable options that allow you to free up space on the deck when the attachment is not necessary. Removable squirrel It is often used for temporary mooring or as a tent anchorage point, retracting inside the boat after use.
- 🔩 Classic rum-bolt: monolithic structure with a threaded base, designed for gluing or screwing.
- ⚓ Rump nut: option of fastening, where the ring rotates inside the nut, which is convenient for changing the angle of tension of the cable.
- 🚀 Quick-release mechanism: It allows you to remove the metal part in seconds, leaving only a neat base on board.
The material of the performance also plays an important role. stainless steel AISI 316Aluminum alloys are lighter but less durable and oxidized when in contact with other metals. Plastic diamonds are only suitable for light loads, such as fishing gear attachment, but not for mooring.
Choice of PVC boats
Inflatable boat owners face a specific problem: how to fix metal on a soft surface that deforms under load. PVC materials use special bases, often called "petaks" or "petals," which are wide plates of durable plastic or metal that are glued to a cylinder or paiola with special glue.
When choosing a model for an inflatable boat, it is important to consider sticker-spaceThe larger the base area, the better the load is distributed on the material of the balloon. The use of small washers is unacceptable, because when they jerk, they will simply tear out a piece of fabric. It is also worth paying attention to the presence of rubber gaskets between the metal ring and the base, to eliminate friction of the metal against PVC.
⚠️ Attention: It is strictly forbidden to use acetone-based adhesives or aggressive solvents not intended for polyvinyl chloride for gluing PVC frymes, which will lead to irreversible destruction of the fabric structure and depressurization of the boat at the most inopportune time.
Often the question arises: where exactly to install the mounts? For the bow of the boat, which experiences maximum loads when towing, it is recommended to use reinforced models with a wide heel. For on-board mounts (for example, for rod holders or anchor cable), more compact options will suit.
Installation of bolts on metal boats
Installation of fasteners on aluminum or steel boats requires a different approach, where the main task is not gluing, but sealed threading. The installation process begins with choosing a place where the side or transom is sufficiently rigid. You can not drill holes in thin metal without strengthening, this will lead to deformation and cracks.
For reliable fixation, additional reinforcement elements are often used, such as response plates or large diameter washers on the inside of the side, which allows you to squeeze the metal of the body between two planes, eliminating its pulling.
☑️ Checklist of preparation for metal installation
An important step is to seal the hole, and even if the pome is placed above the waterline, the moisture will get there from splashes or precipitation. polyurethane sealant It's a must-have or special shipbuilding compound, and you need to apply it not only under the bolt cap, but around the hole on both sides of the side before the final puff.
Installation and load distribution
The right attachment points are the key to safety. Chaotically installed rims can create dangerous situations where the ropes get entangled or create the wrong traction vector. To moor the nose and aft ends, the rims must be located strictly in the diametric plane or as close as possible to the zygomatic parts, but taking into account the angle of departure of the rope.
If the rim is used to tow a water skier or wakeboarder, the mounting point must be located so that the cable does not touch the engine and does not create a roll that threatens to overturn. In such cases, remote brackets are often installed or special towing rims with the ability to adjust the height are used.
| Type of boat | Recommended installation site | Type of load | Diameter of the fastener |
|---|---|---|---|
| PVC (rowing) | Nose, transom, | Mooring, anchoring. | M6 - M8 |
| PVC (motor) | Tranza, side thongs | Towing, mooring | M8 - M10 |
| Metallic | Chestles, Trawn, deck | Towing, liner fencing | M10 - M12 |
| catamaran | Nose cylinders, jumper | Mooring, gear attachment | M8 |
When planning a schema, consider the length of the slats used. Too low can cause the slats to draw water, creating additional resistance. Too high - the force vector will be directed upwards, which can lead to differentiation of the boat.
Nuances of load vectors
When towing another boat, the cable should go horizontally, and if your froth is above the water level of the towed, use an extension cord or lower mount to avoid squeezing the nose of the boat you are pulling, which will prevent the wave from sweeping through the side.
Tools and materials for high-quality installation
To successfully install the bolts, you need a minimum set of tools, but quality matters. Cheap drills can burn metal or tear PVC fabric, so use only a specialized tool. Plastic and rubber often require special types of adhesive that allow chemical welding of materials.
Be sure to prepare a degreasing agent. The surface of PVC or metal must be perfectly clean, otherwise the adhesion of the glue or sealant will be broken. Acetone, alcohol or special PVC cleaners - the choice depends on the material of the case. Do not neglect, because 90% of peeling of the frymes is due to poor surface preparation.
- 🔨 Tools: Drill, set of drills (including stepped for metal), brush for glue, roller for rolling.
- 🧴 Chemistry: Pvc glue (two-component), degreasing, sealant (polyurethane or silicone).
- 📏 Markings: Marker, ruler, stencil (if it comes with a shell).
When working with PVC glue, it is important to observe the temperature regime. Most formulations require air temperatures of at least 15 ° C and humidity of no more than 75%. Attempting to glue with slurry in a cold garage in winter is doomed to failure - the glue does not polymerize properly.
Use paint tape to mark the place of gluing on the PVC boat. This will allow you to try on the rum exactly, check the symmetry and carefully remove the pattern after applying the glue, without dirtying the extra parts of the boat.
Corrosion maintenance and prevention
Even the best quality. stainless It requires care, especially if the boat is operated in salt water; sea salt aggressively affects the metal, causing spot corrosion and acidification of threaded joints; regular washing with fresh water after each exit is a mandatory rule for maintaining the functionality of the fittings.
Once a season, it is recommended to check the nut tightening and the condition of the glue seam. Vibration and constant jerking loads can weaken the connection. If you notice that the rump has started to walk or signs of detachment of the material around the base, the boat should be stopped until the malfunction is corrected.
⚠️ Attention: Never use graphite lubricants near PVC materials. Graphite can react with plasticizers to soften and break the plastic. Use silicone or Teflon compounds to lubricate the thread.
Pay special attention to the condition of the ring. If burrs or sharp edges appear on the inner surface, they must be immediately ground, damaged crow can rub the mooring end or, worse, injure the hands when manipulating the rope, replacing a cheap rum will cost less than buying a new anchor facade or treating injuries.
Regular maintenance of the fittings extends the life of the boat and ensures that in an emergency the fastening will withstand the load, and will not cause the loss of the boat.
Can I put a squirrel on a cold boat?
No, it's strictly forbidden. PVC glue requires a certain temperature to activate the chemical processes. At temperatures below +15°C, the glue will not catch, and the poop will come off under load. If you need to make repairs in winter, the boat should be brought into a warm room (at least +20°C) and held there for several hours before work begins.
Which is better: a sticker or a screw?
Inflatable boats, screw screws cannot be used, they violate the tightness of the cylinder. Only sticker. Metal and wooden boats prefer through the bolt with a nut, as this is more reliable than screwing into the body of the material. Pluting "peepers" on the metal are only put if there is no access to the back side of the board.
Will plastic rum hold anchor?
Conventional plastic rips (often black) are designed to fasten awnings, fishing supplies or light cargo. For anchors that can create significant force when lifting, especially if they are jammed, use only stainless steel metal rips with the appropriate load class.
How to remove old rum from a PVC boat?
To dismantle, you need to warm the place of gluing with a building hair dryer (carefully, not overheating the fabric before melting) and carefully cut with a wax knife. The glue remains are removed with a special solvent for PVC or mechanically using an abrasive nozzle on the drill (at low speeds), after which the place is cleaned and degreased.