Can anyone help me identify these mandrels that came with my PM833tv

C

Capn Noob

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I'm getting my snazzy new PM833tv set up but have these two chucks/mandrels/
collets?? that I haven't been able to identify. Can anyone tell me what they are used for?
The one without a bolt isn't threaded. Just has the small hole.

bit two .jpg
bit one .jpg
 
The one with the bolt looks like an arbor for a face-mill. Its R8 on one side,ad some sort of face-mill will fit on the other end, and the keys are for driving it.

The bottom might be a 'soft' R8 arbor. The idea is that you could turn it to be an arbor for whatever you'd like. The 'hole' in the end is just a center for turning on the lathe. Alternatively, it MIGHT be a jacobs taper for a drill-chuck, but it isn't clear if it is tapered from the picture.
 
ErichKeane said:
The one with the bolt looks like an arbor for a face-mill. Its R8 on one side,ad some sort of face-mill will fit on the other end, and the keys are for driving it.

The bottom might be a 'soft' R8 arbor. The idea is that you could turn it to be an arbor for whatever you'd like. The 'hole' in the end is just a center for turning on the lathe. Alternatively, it MIGHT be a jacobs taper for a drill-chuck, but it isn't clear if it is tapered from the picture.
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Thanks, The one with a non threaded hole was a real mystery .Strange that PM would include them in my order without any additional info or parts but maybe they'll be useful at a later date.
 
Are you expecting a face-mill or drill-chuck with your order in some way? If so, that could be what these are for, and they shipped them separately?
 
davidpbest said:
Is the bottom one tapered on one end? Even slightly? If so it could be a drill chuck arbor with a Jacobs taper.
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Yeah, of the two I mentioned, it makes way more sense that this is a jacobs taper adapter. The jacobs taper is really slight (something like 2.5 degrees?), so it could be easy to miss.
 
It looks like a J6 to me, but easily enough to figure out wit a couple of caliper measurements.
 
davidpbest said:
It looks like a J6 to me, but easily enough to figure out wit a couple of caliper measurements.
Click to expand...
Interestingly, all the drill chucks on the PM page for that mill say:
"One Piece Shank, no tapers to come apart"

And the only place I've ever seen a JT is on a drill chuck, so I don't know what that would go to otherwise...
 
Face mill arbor and a Jacobs arbor. My 932 came with the same ones. Still sitting in the tool box a couple years later.
 
ErichKeane said:
Interestingly, all the drill chucks on the PM page for that mill say:
"One Piece Shank, no tapers to come apart"

And the only place I've ever seen a JT is on a drill chuck, so I don't know what that would go to otherwise...
Click to expand...
That doesn’t mean that the manufacturer of the mill didn’t toss in a JT adapter. I got one with my PM935 and quickly turned it into something more useful.
 
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