Simington / Silvey Square Chain Grinders Tips/Tricks/Secrets

[pbillyi69]

i used to use a 450 in the mid 80's and you can make a really sharp chain with one although i really like the ability to change the inside angles of my cutters which is what they change

 

[pbillyi69]

@Mastermind what changes have you made? pictures?

 

[huskihl]

i advance the chain stop but when the tooth get close to being worn out you have to change the setting on the arm to get it to make contact with the wheel. as the tooth gets shorter eventually you have to slide the the holder down a little so the cutter will contact the wheel you can get a few more uses out of the chain

I thought about this the first couple chains I did. I sharpened a new chain and then I sharpened an old nearly worn out chain. If you use the chain stop to advance the tooth, all of your angles always change throughout the life of the tooth. If you have 3° forward lean on a new chain, you’ll be leaning back 3° by the time it’s worn out. I use my chain stop for the attack angle I want, whether I’m trying to make a fast chain or a work chain that will last a few tanks of fuel . And instead I lower the arm a little bit each time I sharpen or when I have one with shorter cutters.

 

[pbillyi69]

dont you end up with a super thin top plat by the time you are at the end? i have spent a lot of time thinking about inside angles of my cutters. i wish there was a way to measure them to see what they are exactly. i am an expert over thinker... lol

 

[Mastermind]

you can buy a new arm that is adjustable for about 60 buck

Where at sir?

 

[Mastermind]

@Mastermind what changes have you made? pictures?

I bored the center out and made an offset bushing for it. The drawback is that to move down you also have to move forward or back.

 

[huskihl]

Where at sir?

Shaun makes them I believe

 

[pbillyi69]

from the mfg
541-947-4444

 

[huskihl]

dont you end up with a super thin top plat by the time you are at the end? i have spent a lot of time thinking about inside angles of my cutters. i wish there was a way to measure them to see what they are exactly. i am an expert over thinker... lol

No, that actually stays exactly the same.
Next time you’re out at your grinder, take a look and you’ll see what I’m talking about. Every chain cuts exactly the same whether it’s new or completely worn out and I never have to change my dresser angles

 

[pbillyi69]

i have been trying to figure out why it changes when you swing the arm into the wheel and you turn the chain stop to advance the tooth forward a little why it changes as the tooth wears out nothing has changed except the length of the tooth excepth that the tooth is just a little narrower at the back than it is at the front

 

[pbillyi69]

i only chane my dresser if i want a differen shape of cutter.

 

[Mastermind]

i have been trying to figure out why it changes when you swing the arm into the wheel and you turn the chain stop to advance the tooth forward a little why it changes as the tooth wears out nothing has changed except the length of the tooth excepth that the tooth is just a little narrower at the back than it is at the front

The tooth is further around the radius on the chain holder. Has to change the angles.

 

[huskihl]

i have been trying to figure out why it changes when you swing the arm into the wheel and you turn the chain stop to advance the tooth forward a little why it changes as the tooth wears out nothing has changed except the length of the tooth excepth that the tooth is just a little narrower at the back than it is at the front

The chain holder is round. As you advance the cutter into the wheel, that cutter begins to tip down more and more every time you sharpen it. It’s probably not a big deal on a 3/8 low pro as the cutter is only 1/4” long, but on .404, there is quite a change in the shape of the cutter from a new chain to an old one

 

[srcarr52]

My 450 doesn't have an adjustable arm. I made an adjustable chain holder instead. I'm looking at another way to raise and lower the chain holder aside from what I've done so far.

Something like this?

 

[huskihl]

I know it’s against the grain, and it’s not what the manufacturer says to do. But it’s the only thing that makes sense to me

 

[Mastermind]

Something like this?

View attachment 326754 View attachment 326755

I like that.

 

[srcarr52]

The chain holder is round. As you advance the cutter into the wheel, that cutter begins to tip down more and more every time you sharpen it. It’s probably not a big deal on a 3/8 low pro as the cutter is only 1/4” long, but on .404, there is quite a change in the shape of the cutter from a new chain to an old one

There is also a lot of change and how the cutter rocks up to make the cut from new to old. Maybe the change in cutter geometry is making up for some of that.

 

[Mastermind]

Something like this?

View attachment 326754 View attachment 326755

When can I send my arm?

 

[srcarr52]

When can I send my arm?

Give me a few months and I'll try to mod a chain holder and make the square block before it gets here for a quicker turn around.

 

[Mastermind]

Give me a few months and I'll try to mod a chain holder and make the square block before it gets here for a quicker turn around.

Deal. Just let me know. Open that groove up some too !!!!!

LOL