Best chain grinding angles on Stihl RS ?

[redbull660]

So far i am having a hard time duplicating the sharpness of factory Stihl RS. That stuff is just really sharp!!! I am using the recommended angles on the USG. Anyone have any pointers or better angles to use?

 

[w8ye]

I bought a new loop of RS the other day and I noticed the hook angle was really sharp. It is certainly not the common 60 degrees.

As sharp as it is, I have little hope of the edge holding more than just a few cuts.

When it dulls, I'll re-sharpen at 30-60-10 on my Oregon 511A grinder and go on with cutting wood.

 

[AKDoug]

It's not at the common 60deg... it's at 50 if done on an Oregon grinder, or 40 if done on a USG. I have no issues with life span or sharpness on that chain, at that angle.

 

[old-cat]

I always use 25* and an Oregon file guide but not the recommended one. On 3/8 chain I use a 3/16 file and 5/32 file guide. That makes the teeth very near the original RS shape. AND they DO cut good!

 

[redbull660]

I have found factory RS to hold up rather well. Generally I would say better than my sharpened angles. Dare i say the hook actually seems to keep cutting vs the less hooked top plate seems to get beat up and dull faster?

 

[ChoppyChoppy]

30-60-0 is what I use. I mostly run RS on my saws.

 

[Moparmyway]

The RS that I sent in for the "friendly chain competition" @ Hedges' was 30/55/5 off the roll
On my 511a I use 30/55/0 and set rakers to .030 on a real strong saw or .025 for a normal saw (depending on bar length)

On my own chain ........... if its full chisel (RS or PS) - there is nothing like square filed, but with semi (RM) I stick with 30/55/0

 

[lambs]

I run 30-58-0. Hook seems closer to factory at 58 or so than at 60.

 

[Trx250r180]

The usg uses different angles than the oregon type angles guys ,the std 30-60-0 or 10 does not apply to a stihl grinder

 

[Trx250r180]

I think this was 30 on the wheel tilt ,-30 on the base slide ,and 20 or 25 on the top plate angle ,came out looking almost like square

 

[big t double]

I think this was 30 on the wheel tilt ,-30 on the base slide ,and 20 or 25 on the top plate angle ,came out looking almost like square
View attachment 387701 View attachment 387702 View attachment 387703 View attachment 387704 View attachment 387705

what wheel did you use....I remember you posting this before and I tried to replicate it but I don't think it came out right because I didn't use the same wheel.

 

[Moparmyway]

That's some LARGE hook for round, what height are the rakers ?

 

[Trx250r180]

That's some LARGE hook for round, what height are the rakers ?

rakers untouched off the roll
I was just playing with angles ,never tried it in a log ,that was a chunk of chain left over off the end of the roll

It felt real sharp to the touch though

 

[Trx250r180]

what wheel did you use....I remember you posting this before and I tried to replicate it but I don't think it came out right because I didn't use the same wheel.

it is a pretty thin wheel that came with the usg ,this is only image i have that has a wheel shot ,not very good though ,it is a lot thinner than the oregon wheels ,and does not plug up with black stuff ,hardly needs dressed ,and does not heat the cutters up very bad at all

 

[Duane(Pa)]

I think this was 30 on the wheel tilt ,-30 on the base slide ,and 20 or 25 on the top plate angle ,came out looking almost like square
View attachment 387701 View attachment 387702 View attachment 387703 View attachment 387704 View attachment 387705

How does this chain cut? Kind of looks like it would git-r-dun...Also, what type of wood(species) are you cutting?

 

[Trx250r180]

How does this chain cut? Kind of looks like it would git-r-dun...Also, what type of wood(species) are you cutting?

i never tried this in wood ,was just messing around with different angles on the grinder one night ,i have a silvey that does square chain ,so my chains are all square ,that cutter did feel very sharp to the touch though ,with the amount of hook it may have been grabby though just looking at it

 

[AKDoug]

it is a pretty thin wheel that came with the usg ,this is only image i have that has a wheel shot ,not very good though ,it is a lot thinner than the oregon wheels ,and does not plug up with black stuff ,hardly needs dressed ,and does not heat the cutters up very bad at all View attachment 387722

I'm willing to bet that is the wheel for 1/4 and 3/8 picco. What are the last four numbers on the part number on it? 7010 is the wheel for standard 3/8 and .325, 7013 is for 3/8 and 1/4 picco.

 

[big t double]

I use three different wheels for the usg depending on the tooth. Just how I was taught. I tried the same angles that trx250r180 posted above and cut with it...it cut pretty good but seemed to dull a little quicker than I'd like. I should try them again and make sure I use the picco wheel.

 

[MustangMike]

When I used RS, I was able to duplicate factory sharpness with a 12v hand held sharpener w/a 7/32 diamond stone (the stones that come with the sharpener are crap, I think I used EZE lap). The guide on it makes it easy to duplicate the factory 30 degree angle, and with RS do not keep the cutter level, s/b a little incline. I just follow the factory angles.

They are not expensive, and you will cut your sharpening time in half. Works very well with a stump vice. Lock the chain than do 3 or 4 teeth on left, then the same # on rt, then unlock the chain an move it and repeat till done. Goes fast.

You will also be glad you got the grinder when you rock the chain, cleans it up much faster than by hand.

 

[redbull660]

did some chain testing yesterday. The chains are -

Factory RS
RS resharpened with USG 30/40/10
RSLH (sq grd half skip) converted to RS H (rapid super/round ground half skip) with USG 30/40/10

all 3 chains have done the same amount of cuts before this test. Approx 15 ea.
Saw 661R, bar tsumura 36", oiler at max


Wood - Cherry or Rock Elm one of the two....it's hard as a rock and now it's frozen. About 15 out yesterday.
factory RS


RS resharpened USG 30/40/10 -



RS "H" converted from RSLH resharpened USG 30/40/10 ...you'll have to excuse my language at the end


------------------------------------
New wood - willow and oak

factory RS


RS resharpened USG 30/40/10 -


RS "H" converted from RSLH resharpened USG 30/40/10
https://www.youtube.com/watch?v=IjGg_DABLZA



Times in Cherry -
factory RS - 33.7
resharp RS - 34.8
resharp RS "H" - 32.6

Times in willow oak
factory RS - 19.3 16.8
re-sharp RS - 19.7 17.9
re-sharp RS "H" - 18.1 13.8