The centrifugal clutch is the link between the engine and the chain. If the engine spins fast enough the centrifugal force on the weights overcomes the force being applied by the spring, and the weights are slung outward. Once the engine is spinning fast enough, there is no slip in the clutch.
There are deep grooves in the bar to keep the chain from flying off the bar and to keep the chain cutting straight. Gently file the materials of the bar, clutch drum, clutch shoes, sprocket, chain dogs, and teeth. Draw a chainsaw bar and chain as they are cutting a block.
The clue is in the name! A chainsaw has two main parts: a saw blade built into a chain, wrapped around a long metal guide bar, and a small, one-cylinder gasoline engine. Chainsaw helmets with visors offer some protection; so too do chainsaw uniforms. Wayne’s Chainsaw Museum: A short video tour of Wayne Sutton’s chainsaw museum in the United States, will hundreds of saws dating from about the 1930s.
The typical centrifugal clutch has weights, springs, shoes, and a drum. While the engine is off or running at a low RPM the springs of the clutch are able to hold the weights in a neutral position, as the engine RPM increases the weights due to centrifugal force are becoming heavier and eventually over power the springs and start so engage the clutch. This is called clutch engagement, at this RPM no real work can be completed but as the RPMs continue to increase greater force is applied to bring the load up to speed and transfer all the power of the engine to the load. This allows work to be completed with the transmission of power nearly identical to that of a direct connected device.
how does chainsaw clutch work Related Question:
Can you run a chainsaw without a clutch?
A clutch is an absolute necessity on a chainsaw. Without one, the chain sprocket would be connected directly to the motor, and the chain would turn even when the engine is idling.
How do I know if my chainsaw clutch is worn out?
Does the engine loose revs, or the engine keep revving and just the chain stops? If the engine is still running at normal revs, and the chain slows down, then it’s a problem with the clutch. Worn out, gummed up, jammed springs etc. If the engine looses revs under load then it’s more likely a fuel or carb problem.
Why is my chainsaw clutch slipping?
Clutch Wear Eventually, the lining becomes too thin to do its job, and the clutch begins to slip. This happens for two reasons. One is that the lining becomes so thin that the shoes don’t make complete contact with the drum, and the other is that the surfaces of the shoes become slippery.
What part of a chainsaw clutch is directly linked to the crankshaft?
An outer drum that turns freely – This drum includes a sprocket that engages the chain. When the drum turns, the chain turns. A center shaft attached directly to the engine’s crankshaft – If the engine is turning, so is the shaft.
Can I start chainsaw without chain?
It is not recommended to run a chainsaw without a chain. If you need to run it as a movie prop or you are fixing the engine, ensure that you run it for a short time only. I do not recommend letting it run for more than 5 minutes. Without a chain, the chainsaw will cause the engine to rev higher.
What does a centrifugal clutch do?
A centrifugal clutch is a mechanical device which is used on driven rotary equipment. Most commonly used with a combustion engine, the clutch can be used to automatically transmit the torque from the drive to the driven equipment giving a “soft start” with no load engagement.
What type of clutch does a chainsaw have?
Chainsaws use a centrifugal clutch, which automatically engages when the engine spins at high speed (when the saw is actually chopping wood) and disengages when it’s running more slowly (idling, in other words). A centrifugal clutch is really simple and consists of just a few parts.
What rpm does a chainsaw run at?
Depending on your saw, the reading should be between 10,000 and 14,000 rpm. That’s a wide variation, and so it’s important to look up the maximum speed of your saw before conducting this test. The engine should never run faster than the maximum speed at which it is designed to run.
Which way does a chainsaw chain rotate?
A chainsaw blade always rotates from a clockwise direction. The direction of the chainsaw blade is always the same regardless of the type or model of chainsaw. So the sharp edges of the blade should always face the clockwise direction.
What happens if you run a chainsaw without bar oil?
Without lubricant, the speed at which the chain moves over the chainsaw bar can cause some serious friction. A slowed-down chain and excessive fuel burning mean there’s a lot of friction between your bar and chain, which means a lot of heat is being produced that could do major damage to your saw.
Can you run a chainsaw without a air filter?
Don’t Run Your Chain Saw With a Dirty Air Filter But if you don’t clean/replace your air filter (shown here), the engine will suck some of that dirt and dust into the combustion chamber, causing excessive wear. If you notice a loss of engine power or excessive fuel consumption, check the air filter.
Why does my electric chainsaw keep stopping?
If your electric or gas saw’s chain won’t turn around the bar, chances are that the chain brake is stuck. On some saws, resetting the chain brake is as simple as pushing in on the side cover of the saw’s body with one hand, and pushing the chain brake forward while grabbing the top handle with the other.
Should you lubricate a chainsaw clutch?
Although the clutch shoes of a Stihl chainsaw should never be greased, the needle bearing that fits inside the chain sprocket, which is part of the clutch mechanism, may need occasional lubrication.
Do Needle Bearings need grease?
Needle bearings are usually lubricated with grease, but oil or oil-mist lubrication is preferred for heavy-duty or high-speed applications. Many light-duty bearings never require relubrication, but high loads or speeds demand it.
Can you use wd40 on chainsaw?
Step 5: Lubricate Your Chainsaw Before you put the chain back onto your chainsaw you will have to lubricate it to clean it, using WD-40® Multi-Use Product. Before refitting the chain into the chainsaw, wipe off all the excess residue and then reattach it to the guide bar.