Maka stv vs oliver 91d?

[peter gagliardi]

If you are going to be running old US or UK chisel and bit sets, the collets will work, as the bores are standardized to the drill diameters. If you are going to use some of the current Japanese tooling, you will find a drill chuck setup invaluable. The newer stuuf is less standardized, and drill diameters are off. Also, newer drills are generally too short to run properly in the collets.

Interestingly, the Oliver is patterned after, or used the castings/design of the Greenlee manual machines for the most part.

[Jared Sankovich]

Jared,
i think a chuck would be an advantage. Also, the premium Japanese chisel sets have odd auger sizes that don’t fit the standard bushings. If you can make your own or have access to a machine shop that also solves the problem. I believe a chuck would be faster for tooling changes though.

Fortunately I owned a milling machine and lathe long before I owned a circular saw. That fact has worked out well when I've accidentally bought slightly broken machines.

The collets/bushings would be very easy to make, though if the Japanese stuff varies that much a chuck would be the way to go.

[Jeff Bartley]

How hard is the chuck conversion on a 91?

[Jared Sankovich]

How hard is the chuck conversion on a 91?

From just a quick observation it Looks like the rotor has to come out to be cut down and a internal taper cut.

[Darcy Warner]

How hard is the chuck conversion on a 91?

I will try to take some pictures of how the one I have is done. It's all apart currently

[Darcy Warner]

From just a quick observation it Looks like the rotor has to come out to be cut down and a internal taper cut.

You add a spacer between motor and chisel cone.

[Jared Sankovich]

You add a spacer between motor and chisel cone.

That would be easier

[Jared Sankovich]

Wiped it down, it looks better than I expected.
20190204_212256.jpg

[Jeff Bartley]

Looks good Jared. I have a 91 also but mine is 440 only, haven't decided what to do about that yet. Hopefully I'll get to it later this month.

[Joe Calhoon]

Here is a picture of a Oliver with a chuck. I looked at this one at the Forest Products lab in Madison. Not the best picture of the chuck.
Oliver mortiser.jpg
Oliver mortiser 1.jpg

[Jared Sankovich]

Here is a picture of a Oliver with a chuck. I looked at this one at the Forest Products lab in Madison. Not the best picture of the chuck.
Oliver mortiser.jpg
Oliver mortiser 1.jpg

I believe most of the small oliver mortisers had chucks

194d
Ralph_Rye_194-2.jpg

[Joe Calhoon]

My bad, I forgot about the 194..