Best way to mill top and bottom faces
Moderator: Harold_V
Best way to mill top and bottom faces
Hi chaps, I have a small cnc sieg mk2 milling machine. I need to machine some model tank tracks. These need to be machined on both the top and bottom faces. The bed of my mill is too small for any 4th axis set up. The tracks need to be steel are around 3inchs long by an inch wide and 2/8th thick. Can anyone think of away to hold the work piece which will allow the correct alinement of both faces for machining. Thanks, michael
Re: Best way to mill top and bottom faces
A drawing of the part will make it easier to provide advice.
Can you post one here?
~RN
Can you post one here?
~RN
Re: Best way to mill top and bottom faces
Hi, not made a drawing as yet as I don,t know if it’s possible for me to machine the parts. It’s a panzer tank track
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- Location: Elmwood, Wisconsin
Re: Best way to mill top and bottom faces
How about some photos, then?
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- Posts: 1852
- Joined: Tue Dec 06, 2016 4:05 pm
- Location: Elmwood, Wisconsin
Re: Best way to mill top and bottom faces
Good idea.
Re: Best way to mill top and bottom faces
John, what’s a good idea, using the stud holes. I was thinking of making a sort of jig with bolts that screw into the holes allowing the botton face to be machined as that’s flatter and then turning over and rescrewing to machine the top face. There must be a better way, but I can,t think of one.
Re: Best way to mill top and bottom faces
Give some thought to using aluminum jaws in your vise, whereby you can machine away portions of the jaws where necessary. That's an excellent way to hold difficult to machine parts, assuming they lend themselves to the concept. I machined this antenna latch that way.
The spike you see in the picture is a common straight pin.
H
The spike you see in the picture is a common straight pin.
H
Wise people talk because they have something to say. Fools talk because they have to say something.
Re: Best way to mill top and bottom faces
My worry is making sure that both faces are set with the correct zero position, and do make sure of this the part must be in the correct position for milling both faces.
Re: Best way to mill top and bottom faces
Then you create a pocket in the jaws, so the part indexes correctly. No big deal, especially considering you have a CNC. That's common practice.
The part shown had incredibly tight tolerances--nothing looser than ±.003", with several dimensions held to ±.001". I indexed off the large hole (.031" diameter). Just get a little creative. You can do it.
H
The part shown had incredibly tight tolerances--nothing looser than ±.003", with several dimensions held to ±.001". I indexed off the large hole (.031" diameter). Just get a little creative. You can do it.
H
Wise people talk because they have something to say. Fools talk because they have to say something.
Re: Best way to mill top and bottom faces
thanks for that info. michael