The sprocket is designed to drive the proper-pitched chain around the guide bar. It’s important not to run a new chain on a badly worn drive sprocket. By understanding saw chain terminology, you can better maintain and operate your chainsaw.
The floating style is the best drive system for pro saws for several reasons: With a floating sprocket system, the rim sprocket aligns perfectly with the groove in the bar. “3/8” X 7 sprockets work well on small pro saws. These saws not only benefit from 3/8 chain, but the 3/8 X 7 sprocket is the smallest diameter of all standard seven spline sprockets.
Rim sprockets are supposed to ‘self-align’ the chains when cutting; whereas spur sprockets develop a wear groove. Spur sprockets are more likely to burr drive links when a chain jumps the bar groove. In regards to power, I truly believe a spur will make more power.
what is a chainsaw rim sprocket Related Question:
Where is the sprocket on a chainsaw?
Chainsaws use one of two types of sprockets to engage and spin the chain: spur/star sprockets and rim sprockets. The sprocket is the piece beneath the clutch that actually drives the chain.
When should I replace my chainsaw sprocket?
The chain sprocket must be replaced if the depth of the wear marks reaches about 0.5mm, i.e. the wear limit. A seriously worn chain sprocket can cause the chainsaw chain and guide bar to wear at an increased rate, as well as reducing cutting performance too, so it’s important to keep an eye on.
Are all chainsaw drive sprockets the same?
Modern chainsaws run two different types of sprockets; spur sprockets and centre drive sprockets. There are hundreds of variation of each of these types of sprockets.
Which is better rim sprocket or spur sprocket?
Rim sprockets are better than spur sprockets because they are easy to maintain, offer increased flexibility and have a lower cost. Unless you have a very specific use case, you will be happier with a rim drive sprocket and so will your chainsaw.
What size is chainsaw sprocket?
Sprocket Size & Gearing On most pro saws this will usually be: . 325″, 3/8″, or . 404″. When replacing a sprocket, it is also important to know the amount of “teeth.” For example, on a 3/8″ pitch sprocket, both 3/8″ X 7 and 3/8″ X 8 sprockets are common.
Do chainsaw sprockets wear out?
Spur sprockets typically cost around $22 to $30. Please keep in mind that all sprockets will exhibit wear or grooves after use but do not need to be replaced until the chain will not rotate smoothly.
How long does a chainsaw sprocket last?
Even though sprocket maintenance is such as an important aspect of overall chainsaw maintenance, many tree professions tend to overlook it. The sprockets should ideally be changed every two to three chains. It’s also crucial you buy a sprocket that’s compatible with the chain on your saw.
Are chainsaw sprockets gauge specific?
Drive sprockets can drive any gauge chain, only the pitch matters.
What is a Picco chain?
STIHL PICCO™ Micro™ 3 chain is a low-kickback, narrow kerf, smooth-cutting and low-profile chain ideal for small to mid-sized chainsaws with between 1.5 kW (2.0 bhp) and 1.9 kW (2.5 bhp). It performs equally well as compared to the PMM3 chain, with the only difference being a slight increase in weight.
What is chainsaw bar pitch?
Pitch. Chain pitch is the size of the chain and is defined as the distance between any three consecutive rivets divided by two. Oregon chain is made in several pitches – 1/4″ is the smallest, 3/8″ is the most popular, and 3/4” is the largest.
What does a clutch do on a chainsaw?
The clutch allows the engine to turn freely at low rpm [rpm=revolutions (turns) per minute] without moving the chain. They are separate. Unlike a four wheeler or truck, the chainsaw operator doesn’t have to engage the clutch or put the chainsaw in gear.
Can I put a different size bar on my chainsaw?
Most chainsaws can operate up to three different bar sizes. Guide bars are measured in length, from the tip of the bar to the heel, and range in size from 14 to over 40 inches. Check the specifications in your model’s operator’s manual to see what size bars you can run on your saw.
When should I replace the sprocket on my Stihl chainsaw?
To maintain the service life of your saw chain, STIHL recommends that you replace the sprocket on your chainsaw after you have gone through two chains or sooner if the sprocket shows more than 0.5 mm of wear. STIHL advises alternating between the two saw chains to help keep the sprocket from wearing out prematurely.
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 does my chainsaw chain stretch so fast?
Why Does My Chainsaw Chain Get Loose So Fast? One of the most common reasons why the chainsaw chain gets loose so fast is because of wear off caused by time and usage. If you are using an old chainsaw, you will notice that the chain gets loose very frequently thanks to wear on both the chain and the sprockets.