Stihl oiler upgrades. Please post compatible saws and oilers.

[ferris]

Take a NOS brand bar, look at the oil inlet hole (fairly large round hole straight through to the groove and the chains drive links), then compare it to the fancy shmancy new bars oiler holes (tiny, going around corners, poorly aligned to the saws PH oiler groove)!

Yes it is a "environmental thing" same as the 50:1/100:1 2-stroke oils when You shouldn't be running anything lesser than 40:1 even on highest quality oils.

Doesn't mean the end user has to stay oblivious and comply to it.

Use oils no more than a viscosity rating of 100 and enlarge Your bars oiler holes if they are the fancy kind - You will be turning that pump DOWN to get a tank of fuel on a tank of oil!

For the little I cut I make it up to nature through diligent recycling of household trash, utilizing anything "woody" for firewood and barely ever doing joyrides.
I also compost most everything that applies.

U should do some math and u will find out that the tiny Stihl oil hole will flow more oil then any oilpump can pump.

 

[lehman live edge slab]

Maybe something to do with the the fact that it was ported and it seemed to do best when loaded down? Making it run out of gas faster while not spinning super high rpm to through a ton of oil?

They are a positive displacement pump that puts out a set amount of oil per stroke, a 1/2 tank of oil or a little more is enough on a saw if sharp to keep the bar and chain lubed. 462’s and 500’s oil just fine.

 

[Wilhelm]

U should do some math and u will find out that the tiny Stihl oil hole will flow more oil then any oilpump can pump.

I think You are mistaking something, but You wrote it on the interwebs so it must be true.
No I am not doing fluid flow math comparing high viscosity oil flow resistance of a 2-3mm hole vs a 4+mm hole.

You are correct!

Analogy ...

 

[lehman live edge slab]

U should do some math and u will find out that the tiny Stihl oil hole will flow more oil then any oilpump can pump.

If i recall they angled the new ones also to promote oil flow into chain drivers.

 

[lehman live edge slab]

I think You are mistaking something, but You wrote it on the interwebs so it must be true.
No I am not doing fluid flow math comparing high viscosity oil flow resistance of a 2-3mm hole vs a 4+mm hole.

You are correct!

Analogy ...

View attachment 470578

I think all he’s getting at is that small angled hole is enough to flow what’s coming out of any Stihl oil pump on any saw. The holes aren’t different sizes on different length bars and a chain spinning around the bar is carrying the oil away fast enough that the little hole isn’t a restriction in the system.

 

[Wilhelm]

I was generous and specified the tiny high flow Stihl hole as 3mm, and humble specifying the old school bars oiler holes as merely 4mm.

Google AI:

A 4mm hole will allow for approximately 78% more flow than a 3mm hole for the same pressure and viscosity, because the flow rate is proportional to the area of the opening, and the area of a circle increases with the square of its diameter. Specifically, the 4mm hole has an area 77.8% larger than the 3mm hole, meaning it can handle significantly more oil flow.

Understanding the Relationship

• Area vs. Diameter: The key factor is the cross-sectional area of the hole. The formula for the area of a circle is A = πr², where 'r' is the radius, or A = π(d/2)², where 'd' is the diameter.
  • 3mm hole: Area = π(3mm/2)² = π(1.5mm)² = 2.25π mm²
  • 4mm hole: Area = π(4mm/2)² = π(2mm)² = 4π mm²
• Comparing Areas:The ratio of the 4mm hole's area to the 3mm hole's area is (4π mm²) / (2.25π mm²) = 1.778, or approximately 1.78.

Implications for Flow Rate

• The flow rate is directly proportional to the cross-sectional area.
• Therefore, with the same pressure and viscosity, the 4mm hole will have a flow rate about 1.78 times (or 78%) greater than the 3mm hole.

 

[lehman live edge slab]

I milled with the 500 and 462 I had and didn’t have issues with lack of lube or a hot/discolored bar with a 25” in sugar maple the times I did it. Pin knocked in and turned all the way up of course, little over half tank of oil per tank of gas if i recall right maybe a little more.

 

[SawAddictedFarmer]

I milled with the 500 and 462 I had and didn’t have issues with lack of lube or a hot/discolored bar with a 25” in sugar maple the times I did it. Pin knocked in and turned all the way up of course, little over half tank of oil per tank of gas if i recall right maybe a little more.

Even the deadest maple does not compare to oak so dead you could burn it right after cutting it.

 

[Wilhelm]

If i recall they angled the new ones also to promote oil flow into chain drivers.

That is a gimmick at best, all bars oiler holes pass into the chains drive links!
An angled hole yet again increases flow resistance, hence hindering flow.

I think all he’s getting at is that small angled hole is enough to flow what’s coming out of any Stihl oil pump on any saw. The holes aren’t different sizes on different length bars and a chain spinning around the bar is carrying the oil away fast enough that the little hole isn’t a restriction in the system.

And what I am getting at, decrease flow resistance instead of increasing pump pressure & flow volume.

But hey, WTF do I know.

 

[SawAddictedFarmer]

If i recall they angled the new ones also to promote oil flow into chain drivers.

I could drill mine out at a angle next time if it makes you happy??

 

[lehman live edge slab]

I could drill mine out at a angle next time if it makes you happy??

Weren’t you on here asking how to do a timing advance on an 026? Now your giving advice on what oiler to use in a saw among lots of advice and comments about the forum that you’ve been part of for what weeks?

 

[lehman live edge slab]

Even the deadest maple does not compare to oak so dead you could burn it right after cutting it.

I’ve cut red and white oak also doesn’t seem a whole lot harder than maple or some of the ash I’ve cut.

 

[lehman live edge slab]

Even the deadest maple does not compare to oak so dead you could burn it right after cutting it.

 

[SawAddictedFarmer]

Weren’t you on here asking how to do a timing advance on an 026? Now your giving advice on what oiler to use in a saw among lots of advice and comments about the forum that you’ve been part of for what weeks?

Yup it's a friend's saw and I'd never done anything like that before. I know a lot but I'm no fool, I wanted to make sure I got it right the first time.

I’ve cut red and white oak also doesn’t seem a whole lot harder than maple or some of the ash I’ve cut.

It's pin oak, dead and covered for 3 years. Moisture content of 17%

 

[Wilhelm]

Google AI:

Oil flow through a straight hole in a wall is generally more efficient and results in a higher flow rate than through an angled hole, assuming the same wall thickness, because the angle introduces more resistance and pressure loss due to non-ideal flow paths and increased turbulence. While angled holes, particularly those with rounded entrances, can reduce internal friction and improve the discharge coefficient in some applications, a straight, or simply-angled, well-designed hole provides a more direct path, minimizing these negative effects and allowing for a more predictable and higher volume of flow for a given pressure difference.

Factors that influence flow in an angled hole

• Increased resistance:The angled path forces the oil to change direction, creating friction against the wall and energy losses that aren't present in a straight path.
• Turbulence and secondary flows:The change in direction and increased velocity at the exit can generate more turbulent flow and secondary motions, which further increase pressure losses.

Comparison with a straight hole

• Lower pressure drop:A straight hole provides a more direct path, which leads to lower pressure losses and higher flow rates for the same pressure difference.
• Simplified flow:The flow through a straight hole is more straightforward and predictable, making it easier to design and analyze.

 

[SawAddictedFarmer]

@lehman live edge slab
And if you want to play the experience game I'm more than happy to play.

 

[lehman live edge slab]

That is a gimmick at best, all bars oiler holes pass into the chains drive links!
An angled hole yet again increases flow resistance, hence hindering flow.


I think the angle is a benefit because you’re pumping the oil into bar and down the grove vs pumping it into a wall 70 thousandths away from the hole. Yes the drivers are picking it up and carrying it away but I think pumping into the bar at an angle down the grove towards the tip would have less back pressure.

And what I am getting at, decrease flow resistance instead of increasing pump pressure & flow volume.

But hey, WTF do I know.

 

[SawAddictedFarmer]

I'm not trying to be a prick but some of the older members on here need to realize that everyone was new here at one point and just because someone has only on here a few weeks doesn't necessarily mean they're a ignorant homeowner. Also isn't this SUPPOSED to be a place were people can ask questions and get a helpful reply? Or try and put together some helpful information without getting "you've only been here a couple of weeks what do you know"?

 

[SawAddictedFarmer]

I think your right about that! Maybe I'll drill my holes at a angle now.

 

[lehman live edge slab]

Google AI:

Oil flow through a straight hole in a wall is generally more efficient and results in a higher flow rate than through an angled hole, assuming the same wall thickness, because the angle introduces more resistance and pressure loss due to non-ideal flow paths and increased turbulence. While angled holes, particularly those with rounded entrances, can reduce internal friction and improve the discharge coefficient in some applications, a straight, or simply-angled, well-designed hole provides a more direct path, minimizing these negative effects and allowing for a more predictable and higher volume of flow for a given pressure difference.

Factors that influence flow in an angled hole

• Increased resistance:The angled path forces the oil to change direction, creating friction against the wall and energy losses that aren't present in a straight path.
• Turbulence and secondary flows:The change in direction and increased velocity at the exit can generate more turbulent flow and secondary motions, which further increase pressure losses.

Comparison with a straight hole

• Lower pressure drop:A straight hole provides a more direct path, which leads to lower pressure losses and higher flow rates for the same pressure difference.
• Simplified flow:The flow through a straight hole is more straightforward and predictable, making it easier to design and analyze.

Google AI:

Oil flow through a straight hole in a wall is generally more efficient and results in a higher flow rate than through an angled hole, assuming the same wall thickness, because the angle introduces more resistance and pressure loss due to non-ideal flow paths and increased turbulence. While angled holes, particularly those with rounded entrances, can reduce internal friction and improve the discharge coefficient in some applications, a straight, or simply-angled, well-designed hole provides a more direct path, minimizing these negative effects and allowing for a more predictable and higher volume of flow for a given pressure difference.

Factors that influence flow in an angled hole

• Increased resistance:The angled path forces the oil to change direction, creating friction against the wall and energy losses that aren't present in a straight path.
• Turbulence and secondary flows:The change in direction and increased velocity at the exit can generate more turbulent flow and secondary motions, which further increase pressure losses.

Comparison with a straight hole

• Lower pressure drop:A straight hole provides a more direct path, which leads to lower pressure losses and higher flow rates for the same pressure difference.
• Simplified flow:The flow through a straight hole is more straightforward and predictable, making it easier to design and analyze.

Well maybe Stihl knows nothing and wants to sell you less bar oil and one extra bar every few years, could also see when pumping oil at an angle down the grove the passing drivers picking up oil and being sealed enough by said oil to actually create a low pressure area for a split second behind it actually helping pull oil in. But just an opinion and theory I have.