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Cutter Pilot
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 1-15/64" Eclipse Twist Lock Tooling Counterbore Cutter pilot quick change Tool  US $9.99
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Cabin heaters can transform winter sailing, and provided you've got the tools, space and time, are relatively easy to install, too. Winter is an ideal time to install a boat heater. It can make chilly mornings a thing of the past, with the promise of snug evenings aboard in a deserted anchorage. And if you've laid your boat up for the winter, stripping out cushions and equipment, it will make installing a heater a lot easier.
Choosing a heater depends on the size of your boat and your budget. It's better to have a small heater working hard than a big one ticking over that can coke up, like an idle diesel engine.
Where to install?
If you've got the skills, tools, space and time and you want to fit a heater yourself, the prime consideration is the ducting route. Where do you want heat? Is there enough space to work? If you can, cut ducting holes through wooden panels rather than the GRP frames. Not only is drilling easier but, more importantly, you won't compromise the internal structure of the boat.
The ducting route defines where the heater can be fitted. Some heaters specifically need to be mounted horizontally or vertically. Fitting your heater close to the fuel tank and batteries will make life easier.
If you can't use the mounting board supplied, devise another to make sure the heater's location allows ducting runs without sharp angles... every 90° bend loses 5% of the heat, which is why the secret of a good heating system lies in the ducting.
Finally, think about the exhaust exit. If you stow fenders on the pushpit, siting the exhaust next to them will melt them in seconds. And remember, the exhaust needs a swan neck to prevent water entering the heater.
Boat heater installation
It is good practice to run the ducting along the upper edge of lockers to prevent it from being crushed by heavy items while sailing. Boat manufacturers expect some retro-fitted heating, as holes in the tightest places are often pre-cut at the factory. When placing the vents, always drill through from the visible side to prevent damaging the exterior. Thermostat and control wiring should be threaded through the new holes before the ducting. The dial control can be fitted anywhere the wiring will allow, but imagine being able to switch the heating on and off without having to leave the comfort of a warm bunk. Cover the ducting with a plastic bag to stop its rough edges tearing the Thermoduct insulation, then insert two sleeves of insulation over the ducting.
The fuel system
Heaters use solenoid fuel pumps so a lift pipe is needed, fitted to the tank. As the pump can't lift beyond 1m (3ft 3in), line up the lift pipe and tank, score and snap the copper pipe before gently bending it to attach to the pump, allowing two spirals in the pipe to compensate for vibration. A second pipe, running from heater to pump, needs the same treatment.
Run a protective sleeve over the stainless steel exhaust tube and bend a swan neck at the top. Drill a pilot hole in the transom and once sure it is in the right place, take the exhaust fitting outside and place it against the transom to gauge the right angle for the hole.
Using a grinding-toothed hole-cutter to prevent the gelcoat cracking, and enough marine sealant to ensure a watertight fit, bolt the skin fitting in place.
Back in the transom, attach the exhaust and cut to fit. Attach a short air inlet pipe to the heater to allow diesel combustion.
It's a lot of work, so seriously consider whether you've got the skills, tools and time to get it right.
Plan the ducting route first and keep it as straight as possible - bends lose heat. Use the right tools and, when working in confined spaces, take everything you need with you.
Turn angled skin fittings upside down and back to front to work out the correct drilling angle.
Use a vacuum cleaner while drilling into the fuel tank to minimize the debris that enters the tank.
Which heaters to buy?
www.boatpartsdatabase.com has lots of resources for the boating trade and public alike. The web is a vast source of information. Boatpartsdatabase collects the leisure marine industry into one huge database of contacts. Webasto heaters and where to buy them is just one example.
Guidelines For Selecting Plasma Cutting Machines
In simplest terms, plasma cutting is the process of cutting any electrically conductive metal by using high velocity of ionized gas which is delivered from a nozzle. The high pressured ionized gas which becomes the plasma, conducts electricity from the plasma cutting torch to the work piece. The plasma while coming into contact with the work piece heats and melts the material. Thus the metal pieces are cut smoothly. As plasma cutting is perfect for cutting steel and non-ferrous material, it is widely used in industries as well as by amateurs.
When you are planning to buy a plasma cutting machine, certain guidelines should be essentially followed. One of the main factors to consider is the thickness of the metal that you are cutting. Generally the plasma cutters are rated on their cutting ability and amperage. If you are cutting metal with considerably less thickness, you must consider a lower amperage plasma cutter. Likewise, you must use higher amperage machines for thicker metals. Even though the smaller amperage cutter would be capable of cutting metals of any thickness, the quality would be lacking in thicker metal cuts. The optimal cutting speed of the machine should also be considered before purchasing the cutter. A machine with high amperage would cut the metal much faster than one with low amperage.
In most plasma cutters, the pilot arc conducts high frequency electricity through the air. This electricity would interfere with computers or other equipments. So it would be better to select lift arc method that eliminates the problems of high frequency starting circuits. The plasma cutting torches consists of a number of plasma cutting consumables that would require replacement. It is recommended that a machine with lesser consumable would be long lasting and cost effective.
While purchasing plasma cutters, it would be good to make test cuts with many machines and check the quality of each cut. Here, you must look for a cutter that would offer a tight focused arc. Another quality checking method is to lift the plasma torch from the plate during cutting and check how far you can move while maintaining an arc. Generally when the pilot arc is brought close to the work metal, a transfer occurs from pilot arc to cutting arc. A plasma cutter that provides a quick, positive transfer from pilot to cutting arc at large transfer height would the best choice for getting better support during cutting.
One of the main things to be noted is the working visibility of the machine. While you are tracing a pattern, it is essential to see what you are cutting. A plasma cutting torch which is smaller and less bulky would be the best to provide working visibility. Portability is yet another thing to be noted. It is always better to go for a light weight, portable cutting machine. The most important thing is ensuring the safety features of the machine. It is highly suggested that you must buy a machine with nozzle-in-place safety sensor. This sensor makes sure that the machine won't start unless the nozzle is in place. It is also good to look for a machine that would provide a pre-flow sequence.
About the Author
Gavin Bone is an author for Plasma Cutter. He has written articles Welder. For information visit our site mig welders
How can you believe the conspiracies against Obama, but not 9/11?
You can believe that 4 planes were hijacked by men with box cutters. None of these planes were intercepted by NORAD, despite having a perfect interception rate prior to 9/11. Then one plane flown by a horrible pilot, makes a hard 270 degree turn into the pentagon, something that would be difficult for a veteran pilot. Also, a 47 story building that wasn't hit falls due to fire that can't melt the steel it melted (WTC7).
You can believe all of this, and not think anything is fishy.
But you can't believe that Obama may just have been born in Hawaii?
People believe in whatever supports their own prejudices, in other words for you to believe in UFO when someone claims to have seen one, you must have a preconceived idea of the existence of UFO already in the back of your head.
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