- Joined
- Dec 22, 2020
- Messages
- 97
This will be a bit painful without access to my home server as I'm traveling. I'll attempt this anyway.
So this begins with a '70's vintage Honda Engineering Ltd. GVS-27A, Valve seat grinding set.
What this amounts to is a geared down air grinder (1,100 rpm) with a 6mm (.2362") down the center for a pilot that is inserted into a valve guide.
Simple enough? In a word, no.
You see the "nose" of the tool (not shown in the above pic) is M10 x 1.0mm.
grinding stones with a M10 x 1.0mm center have not been made for nearly 25 years.
Finding original pilots for the set is a futile pursuit at best.
Enter Woodward Equipment Customer Service . As I can't post links you'll have to trust your google foo.
After a series of patient and informative phone calls it was first determined that M10 x 1.0mm was not going to happen. Next there was an extensive selection of Black & Decker stones with a 9/16 x 16 TPI center.
So what's the issue?
I doubt the MKII Atlas needs any introduction here. This is where it begins. The hole was drilled and tapped because I didn't have the gears to do the M10 x 1.0. Note to self, next time use a fresh, high quality tap. For the uninitiated, tapping brass can be a chore.
Cutting off a M10 x 1.0 bolt for a mandrel was no difficulty but centering it on a 3 jaw chuck was a study in patience and a few leaves of Zig Zag rolling papers. After all this threading 9/16" - 16 tpi was a cinch.
So this begins with a '70's vintage Honda Engineering Ltd. GVS-27A, Valve seat grinding set.
What this amounts to is a geared down air grinder (1,100 rpm) with a 6mm (.2362") down the center for a pilot that is inserted into a valve guide.
Simple enough? In a word, no.
You see the "nose" of the tool (not shown in the above pic) is M10 x 1.0mm.
grinding stones with a M10 x 1.0mm center have not been made for nearly 25 years.
Finding original pilots for the set is a futile pursuit at best.
Enter Woodward Equipment Customer Service . As I can't post links you'll have to trust your google foo.
After a series of patient and informative phone calls it was first determined that M10 x 1.0mm was not going to happen. Next there was an extensive selection of Black & Decker stones with a 9/16 x 16 TPI center.
So what's the issue?
I doubt the MKII Atlas needs any introduction here. This is where it begins. The hole was drilled and tapped because I didn't have the gears to do the M10 x 1.0. Note to self, next time use a fresh, high quality tap. For the uninitiated, tapping brass can be a chore.
Cutting off a M10 x 1.0 bolt for a mandrel was no difficulty but centering it on a 3 jaw chuck was a study in patience and a few leaves of Zig Zag rolling papers. After all this threading 9/16" - 16 tpi was a cinch.