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Carl, Upon closer inspection, thy do seem to be hand made. I can see the bare metal between the "teeth" The ones with points, there are two of them, the angle appears to be 40 degrees. Neither comes

Hello Timothy,?? I measure my U3 at 12.03 for the hole and 11.95 on the pinion (tooth tip to tip) with 11.97 on the pinion shaft.?? Hope that helps!?? Rgrds,?? Richard.

Hello Larry: Can you measure each gap (1-5)? and tell us the sizes? Thanks, Carl.

That makes sense. These belonged to my step father. Before I was in high school, he was a machinist.? He worked in the machine shop at a local mill. He spent over 40 years there later becoming the

I just got a 12mm pinion blank, but to my surprise it does not fit into the Unimat 3 Vertical Milling Attachment. I measured the opening in the milling attachment and it comes in at 11.8mm. So now I'm

I am just guessing here, but they possibly could be shop-made Acme or square thread gauges. Jerry F. Sent: Friday, July 05, 2024 6:33 AM To: Carl; [email protected] Subject: Re: [Unimat] What are

Can anyone identify these? There are 4 of them, the larger one with "teeth" is numbered 1-5. Thanks, Larry

Hi: They could be sorting gages, each step is a different size for matching graded parts. The other option is the could be used as mandrels between centers for certain parts. Carl.

I strongly suspect these are a form of "go - no go" plug gauges.? I suspect the various diameter features are a series of slightly different diameters. Used for inspecting parts.? The knurled

These came along with my lathe, It came with a lot tooling that looks like they were for a bigger machine and these might not been used with the Unimat. If I were guess, I would guess gauges of some

Sorry, I was thinking of my old SL and didn't notice it was for the U3. Maybe more accurate dimensions will be required for that. Even so, a lot of it could be improvised according to what you want to

Thank you Keith, Peter_B and Peter_N. This is very helpful and I should be able to fabricate one of these per the need. Cheers, Timothy Jump

When hand grinding HSS tool bits keep a small container of water or water soluble coolant to dip the warm tool bit into. A HSS tool bit should not be allowed to get overheated. HSS ?has red hardness,

The 'handle' is held in place by a grub screw at the end of the pinion, I wouldn't glue it if you ever want to be able to use the U3 Fine Feed Attachment (EMCO part number 151.110).

Sorry for my first replay, I misunderstood Timothy. Here is the dimension of my part, as it should be called in English, and a photo of it. Peter Nyffeler

It was made for a 5 inch lathe, it fits a 1/2 inch collet.

If you don't worry about making a replica of the original Unimat one, and their construction did vary, you can do it all without dimensions apart from knowing that the main shaft is 12mm diameter,

Thank you Keith for getting me the spline specs. What I still need are length dimensions. I've attached a rough drawing of the Unimat 3 vertical milling attachment pinion with the length dimensions

It is a bit different. I was just trying to help, OK.

When you start grinding your tool bits... and an ordinary bench grinder works well... for HSS...? I would have to look at the wheel to tell you what is on it... Bill in OKC, is correct, wearing