What will these do

[loose nut]

What kind of jobs can one of these do besides sharpen drills???? I take it that they are not a universal tool and cutter grinder.

http://www.wttool.com/common/images/...e/28130005.jpg

[duckman]

That is not a drill grinder its made for making "D" bits and if your really clever you can make tapered reamers. Had one and sure wish I still had it.

[Arthur.Marks]

precisely dimensioned single point tools for a lathe. Think grooving tools, threading tools, radius tools all ground from round HSS blanks.

[toolmaker35]

Just about any custom cutter you can imagine. Get a CBN and a diamond cup wheel, and you can cover both steel & carbide. Tapered single-flute cutters, bull nose endmills, countersinks with any included angle, engraving cutters, ect. I won't speak for that one personally, but the Deckel that we have in the shop has sure helped me out a time or three.

[loose nut]

What about sharpening between centers like reamers ETC., that doesn't appear to be doable.

[Mcgyver]

What about sharpening between centers like reamers ETC., that doesn't appear to be doable.

reamers are sharpened by grinding the facet on the end, they're sized by carefully stoning along the body.

That is not a drill grinder its made for making "D" bits and

why couldn't this do a good job on drills, i do faceted ones on my T&CG and think I see how you'd do the same on that

precisely dimensioned single point tools for a lathe. Think grooving tools, threading tools

imo, unless there is some sinebar/angle block way to set it, the degree markings on the index are not enough resolution to get a decent threading tool. I've done these in the T&CG and still you end up stoning them so you get a proper fit in the thread gauge. Next version of a multivise I make have a way to incorporate a sine bar aor set of angle gauge blocks so you get it dead on....degrees marked on a 2 or 3" diameter circle aren't enough. I recently got a compound sine table - not that on the surface will do an accurate lathe tool !

[oldtiffie]

I'd have thought that by now there would be a lot more people here who were quite competent at "off-hand" sharpening of drills without the need for any other tools or aids.

[oldtiffie]

Originally Posted by loose nut

What about sharpening between centers like reamers ETC., that doesn't appear to be doable.

reamers are sharpened by grinding the facet on the end, they're sized by carefully stoning along the body

Machine reamers yes.

Hand (tapered) reamers no as they are sharpened on the flutes just as an end-mill cutter is.

[oldtiffie]

.....................................
imo, unless there is some sinebar/angle block way to set it, the degree markings on the index are not enough resolution to get a decent threading tool. I've done these in the T&CG and still you end up stoning them so you get a proper fit in the thread gauge. Next version of a multivise I make have a way to incorporate a sine bar aor set of angle gauge blocks so you get it dead on....degrees marked on a 2 or 3" diameter circle aren't enough. I recently got a compound sine table - not that on the surface will do an accurate lathe tool !

A good digital (or vernier) protactor is calibrated to 0.1 degree (6 arc minutes) the sine or tan of which are: 0.00174 which is 0.00174" per inch over the 1" radius of a 2" base (where the rotation angle marks are) - or 0.0026" over the 1 1/2" radius of a 3" base.

Check Machinery's Hand Book (mine is 27) as there is quite a bit of allowance for threading tool angles.

I'd use a good protractor instead of a "fish" screwing tool when setting the screwing tool symetrical about the cross-slide axis too.

[Jaakko Fagerlund]

Sure machine reamers don't need between centers grinding, but it just makes life so much easier when you have a long reamer so you get support for the grinding operation.

What comes to hand grinding drill bits, sure it is easy to sharpen them, but to do it exact requires plenty of training and time to check and verify that it is correct. With a sharpening machine you remove all that "eyeballing" and get symmetriticy (spelling?) easily, as well as the proper angles.