If you're standing up in the garage looking at a dull saw, knowing the correct 3/8 lp chain file size is definitely the difference between an easy cut and a frustrating afternoon spent wrestling along with a bar that will just won't bite. It's one of those small information that seems small until you understand that using the wrong file can actually ruin a perfectly good chain. Most of us possess been there—trying in order to make a file work because it's the only person in the toolbox, learn out there we've smudged the tooth geometry.
The "LP" in 3/8 LP holds for "Low Profile. " This will be a specific kind of chain usually found on smaller, homeowner-grade chainsaws, post saws, and a few battery-powered models. Since the chain is definitely physically smaller and designed for much less powerful engines, you can't just grab a typical 3/8" file and expect this to operate. If a person do, you'll most likely find that typically the file is method too big to sit properly within the gullet of the cutter.
The magic number you need to remember
For almost every 3/8 LP chain on the market, the standard 3/8 lp chain file size is 5/32 inch (4. 0mm) . This is definitely the gold regular. Whether you're working a Stihl, Husqvarna, Echo, or a generic brand from the hardware store, if it says 3/8 Low Profile or 3/8 Picco on the container, the 5/32" round file is what you want in order to take.
Today, I know what several of the old-timers might say. From time to time, you'll find a specific brand or a slightly worn-down chain where individuals try to make use of a 4. 5mm or an 11/64" file. While there are very niche exceptions, sticking to the 5/32" file keeps items simple and prevents you from filing as well deep into typically the side plate associated with the tooth. If you are using a file that's too small, you'll create a "hook" that's too aggressive, making the saw jumpy and harmful. If you use one that's too large, you won't get that razor-sharp edge because the file won't achieve the "sweet spot" of the cutter's top plate.
Why 3/8 LP is different from standard 3/8
It's easy to get confused because "3/8" is an extremely typical pitch. However, standard 3/8" chain and 3/8" Low Profile are two completely different animals. A typical 3/8" chain is heavy-duty, used on big professional saws, and typically needs a much bigger 7/32" file.
The Low Profile edition was designed to become lighter and even more "snappy" for smaller engines. It provides a shorter height, which is why we call it low profile. Since the teeth are shorter and the chassis of the chain is narrow, it requires that smaller 5/32" file to fit inside the curve associated with the tooth. If you try to use a 7/32" file on a 3/8 LP chain, it basically won't also fit in the particular tooth—you'll just become filing the very best of the metal away without sharpening the particular cutting edge.
Tips on how to double-check your chain
In case you've lost the box and also you aren't sure when you have the 3/8 LP chain, don't worry. A person can usually discover the info stamped directly on the drive hyperlink (the part associated with the chain that sits inside the bar). Most manufacturers use a numbering program. For example, Or often uses "91" to denote 3/8 LP, while Stihl might use the "6" or perhaps a "P" for Picco.
If you can't see any amounts because the chain is covered within oil and sawdust, just look with the saw itself. Is it the 35cc to 45cc saw? Does it have a pub shorter than sixteen inches? In that case, there's a very higher chance it's running 3/8 LP. Grabbing a 3/8 lp chain file size pack of 5/32" files is really a safe bet for the smaller setups.
Getting the method down
Getting the right 3/8 lp chain file size is only half the battle; you furthermore have to utilize it correctly. I've noticed guys go from their chains like they're looking to saw through a piece of rebar. You don't require a ton associated with pressure.
When you're filing, you want to maintain a consistent angle—usually 30 degrees, although some chains prefer 25 or 35. Most files arrive with a small guide or you can buy the filing kit that will has the sides marked directly on it. Use smooth, visible strokes. Don't "saw" back and on. Lift the file off the tooth upon the return heart stroke. The file only cuts in one path, and dragging it backward just dulls the file plus creates burrs upon your chain.
It's also a good idea to count your strokes. If you do three passes on one tooth, do three passes on every tooth. This keeps your teeth an uniform size, which prevents the particular saw from "pulling" to one aspect when you're slicing through a log. In the event that one side of the chain has much shorter the teeth than the some other, the saw will want to curve in the wood, which can result in a pinched bar and a lot of cursing.
Don't forget the depth gauges
If we talk about the particular 3/8 lp chain file size , all of us have to mention the depth gauge, also known since "rakers. " These types of are the very little shark-fin-shaped bumps within front of each cutting tooth. These people don't actually cut the wood; their own job is in order to determine how deep the particular cutting tooth attacks in to the timber.
While you sharpen your own cutters with that will 5/32" file, the teeth get smaller and lower. Eventually, the rakers will be higher than the particular leading edge. When this happens, your saw will produce great dust instead associated with nice wood potato chips, set up teeth are usually sharp. You'll need a flat file and a depth gauge tool to consider those rakers down just a locks. Most 3/8 LP chains want the depth gauge environment of. 025 inches. If you skip this step, your own perfectly sized circular file won't do you much great because the tooth won't be able to reach the particular wood.
Buying the right equipment
When you're shopping for files, you'll see all of them sold individually or even in packs. We always suggest getting a three-pack. Chainsaw files are made of very hard metal, but they do wear out. Once you spot the file sliding over the tooth without "grabbing" or removing metal, it's time to toss it and get a fresh one particular.
Some people such as the "all-in-one" sharpening systems that sharpen the tooth and lower the particular raker at the same time. These types of are great, yet just make certain the one you purchase is specifically labeled for the 3/8 lp chain file size . If you purchase the one meant for. 325 pitch or even standard 3/8, this won't work. These types of systems are generally color-coded, so simply double-check the 5/32" or 4. 0mm marking on the package.
Keeping things clean
One final thing in order to keep in brain: oil is the enemy of a great sharpen. If your chain is caked in bar oil and pitch, your file is going to get gummed up almost immediately. I usually give the chain a quick wipe with a cloth or even a quick spray of brake cleaner if it's really unpleasant before I begin filing. A clear file stays sharp longer and gives you a much better feel for the particular metal as you're working.
I've spent plenty of time within the woods using a saw that wouldn't cut butter, and it's usually due to the fact I got lazy with my maintenance. Taking five moments every number of reservoirs of gas in order to touch up the particular teeth with the particular correct 3/8 lp chain file size makes the work so much simpler. Your back can thank you, your saw's engine won't have to work as hard, and you'll actually complete your chores prior to the sun decreases.
Wrapping up
So, in order to recap the basics: if you're working with a 3/8 LP chain, proceed buy a 5/32" (4. 0mm) round file. Avoid the particular temptation to use whatever is resting around. It's the small investment that pays off every single time you draw the trigger and see those big wood chips traveling by air. It doesn't need to be complicated—just keep your own angles consistent, keep your file refreshing, and don't neglect those rakers. Once you get the hang of it, you'll understand that a sharp chain is more important than the horsepower of the saw itself.