Measure Hook Angle

[HarleyT]

So back to my original question.
What is that pic "trying" to show?

 

[WolfMann]

I think the chain is resting in grinder groove in first screenshot, he's holding the angle plate next to it, might be to just roughly show lowered hook angle.

 

[WolfMann]

So I'm looking to modify a chain in similar fashion, but I don't have a grinder, so what I was trying to ask here is, how do you all measure your hook angles?

 

[WolfMann]

I've seen other questions on chain sharpening here on the chainsaw forum, and this one gets a lot of traffic, thought it would be a good place to ask about hook angles. Figured someone here has played with them before.

 

[Philbert]

@HarleyT , @WolfMann is new. Take it easy on him. We scare away enough new guys!

Philbert

 

[HarleyT]

Well, just asked a simple question......

If you are trying to control the "hook" angle without a grinder, then you would look at file diameter!!!!

 

[HarleyT]

Top angle, well.......
that would be the angle you hold/use the file.

 

[Philbert]

Well, just asked a simple question......

If you are trying to control the "hook" angle without a grinder, then you would look at file diameter!!!!

OR file position, OR the type of file holder used.

Philbert

 

[HarleyT]

As far as any variation thereof, then we might talk about the "drop" angle of the file, which may be related to my question about the first pic.
I am unsure about that.

 

[HarleyT]

Well, for this "rough" discussion, we should just stick with "freehand" filing, unless we put up pics of our own private "jigs"......

 

[HarleyT]

Mine is a small one, btw......

 

[Philbert]

Mine is a small one, btw......

No surprise there . . .

Philbert

 

[Philbert]

"Standard" file hides will give you "standard" / general filing angles.

The clamp -on, Granberg style filing dates will let you set almost any hook angle, and obtain it consistently. But you won't see any numbers that you can read or measure.

Philbert

 

[HarleyT]

Back to my first question, what exactly is the guy trying to measure with the "gauge" in the first pic?

 

[HarleyT]

No surprise there . . .

Philbert

Let's see your big jig!!!

 

[WolfMann]

Harley you could at least buy a guy dinner before you try to see his jig lol

 

[WolfMann]

Yeah I've been using the Granberg jig, can adjust file up and down .010's at a time. Like Philbert was saying though, can't measure the angle of hook with it.

 

[Huskybill]

I hog out the gullet first for chip clearance then use a file n guide to set the proper angles on the top of the tooth. It’s up hill on the tooth to the outside. Rest the file n guide on the top of the tooth angle. This sharpens only the top edge. File it till the edge is sharp across the top.

 

[Philbert]

Let's see your big jig!!!

Need aerial photography to get it all in!

Philbert

 

[Philbert]

Back to my first question, what exactly is the guy trying to measure with the "gauge" in the first pic?

Slope angle of the underside of the cutting tooth.

'Hook' measurement should also include the depth of this bevel IMO.

Philbert