The Home Machinist!

I have just purchased a BP 90deg. angle attachment for use on my JEt mill. Until now, all the BP "gadgets" have fit without a problem. Preliminary measurements of the dovetail ways on the ram appeared ok until I went to put the arbor support on and found the dovetail angle is different. In reading one of Harold's old posts, he mentions 50 deg. and that is what I read on the BP arbor support. The best I can read on the JET, it looks like 55 deg.. I want to re-cut, open up the arbor support with the corresponding angle of the JET and then fit a gibb that will take up the difference in width.

I should mention that the JET mill is a 1048 VS model.

However, I don't see any reference in my JET manual on the angle and my research so far hasn't shown that the 55 deg. as a standard cutter.

Any thoughts or information would be appreciated.

Thanks
Steve

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Jet vertical Mill, Champion 12X30 lathe, Amer. Mach. Tool radial drill, 24"X60" LeBlond lathe, Scharmann 3" Hrz Brg Mill, Steptoe 18" Shaper, South Bend Shaper, Jet 14" Power Hacksaw, B & S (No.4 36") Gear Cutting Mach., Wm Pilton vert. Slotter, Enco 12" horz. saw, McEnglevan MP36 foundry furnace, Rockwell 14"X42" lathe, K&T 2H univ horz. mill

in light of further description this post was unhelpful..

Not sure that is all that involved since the arbor support has a lateral adjustment of and inch or so. If I can just the correct angle, then fit a gibb to make up the difference in width. Wouldn't have to be an adjustable gibb or wedge since the support has a internal clamping device.

Then again, I might be over simplifying this.

Thanks.

Steve

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Jet vertical Mill, Champion 12X30 lathe, Amer. Mach. Tool radial drill, 24"X60" LeBlond lathe, Scharmann 3" Hrz Brg Mill, Steptoe 18" Shaper, South Bend Shaper, Jet 14" Power Hacksaw, B & S (No.4 36") Gear Cutting Mach., Wm Pilton vert. Slotter, Enco 12" horz. saw, McEnglevan MP36 foundry furnace, Rockwell 14"X42" lathe, K&T 2H univ horz. mill

Sounds like you're just going to have to buy a tool and cutter grinder! You know you want one. Here's the excuse.

Wayne

I have one and have never used it. I got it from a damaged freight action a few years ago. Might be an opportunity waiting for a purpose.

Steve

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Jet vertical Mill, Champion 12X30 lathe, Amer. Mach. Tool radial drill, 24"X60" LeBlond lathe, Scharmann 3" Hrz Brg Mill, Steptoe 18" Shaper, South Bend Shaper, Jet 14" Power Hacksaw, B & S (No.4 36") Gear Cutting Mach., Wm Pilton vert. Slotter, Enco 12" horz. saw, McEnglevan MP36 foundry furnace, Rockwell 14"X42" lathe, K&T 2H univ horz. mill

I posted this in you other thread as well, it might help.
http://madmodder.net/index.php?topic=2083.0

Dave

Forgot to say yo can buy a 55 deg cutter, it was talked about on another forum about a month or so ago.

Dave

If you are going to use a shim or 'gib' anyway, why not just make two with a 2 1/2 degree taper, or whatever is needed to match the dovetails. seems to me a lot easier than recutting dovetails unless the widths won't allow it without recutting.

Edit: Okay, I see from your other post that there is an interference as well as angle difference. You could still widen one or both of the outer dovetails at the original angle and use tapered shims.

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Don Young

How could you have a T&C grinder and not use it? It is far more useful than just sharpening tools. I had my inexpensive Delta Toolmaker for 20 years before I inherited a mill. I am learning that both are important, but one keeps the other's cutters sharp and working properly, and the other helps make really nice fixtures for both. I would recommend fixing the T&C and putting it to work.

On another note, I'd be careful with the insert tooth dovetail cutters. The shop bought a 60° cutter many years ago, and the selling point was being able to use triangular inserts. Well the inserts had a 5° rake angle and as a result the cutter made dovetails at a bit less than 60°. We sent it back with a love note. But maybe things have changed since then.

As you noted, the width is my other problem but your first suggestion combine with the second would allow the mode and an easy reversion to BP use. a pair of 2 1/2 degree tappered shims, one for each side for on the JET and a pair of parallel shims for the BP, to make up for the material removed.

This would eliminate the special dovetail cutter and I just need to get a 50 degree one to open up the space.

Thanks.

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Jet vertical Mill, Champion 12X30 lathe, Amer. Mach. Tool radial drill, 24"X60" LeBlond lathe, Scharmann 3" Hrz Brg Mill, Steptoe 18" Shaper, South Bend Shaper, Jet 14" Power Hacksaw, B & S (No.4 36") Gear Cutting Mach., Wm Pilton vert. Slotter, Enco 12" horz. saw, McEnglevan MP36 foundry furnace, Rockwell 14"X42" lathe, K&T 2H univ horz. mill

Well, the principals of some of the tool grinding are rather intimidating and I'm missing the manual for the machine (and maybe some components). It's an import and identical to one that JET sold for a while. I'm going to include a picture since I'm not sure of what I have. Got it and a magnetic chuck to do some surface grinding with, that I can understand.


I saw one like this at the estate sale last year and it had a tool holder for end mills, that I don't have. Something I should get since I'm now getting into milling and eventually must resharpen some.

Drill bits, I learned that as an apprentice 50 years ago and mostly free handed them. Now that I have much larger bits I got a "The Champ" and it can handle large bits to 3" but cuts in facets rather than sweeping that I was taught. Seems to work well once I get the preliminary set ups down. I now have a large collection of large MT bits at a good price, mostly because they need sharpening..


Lathe tool bits, I kinda grind by following the angle of the last guy or use inserts. Right now I'm on a quest for knowledge on shaper tool sharpening, especially for my BP vert. slotter.

Steve

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Jet vertical Mill, Champion 12X30 lathe, Amer. Mach. Tool radial drill, 24"X60" LeBlond lathe, Scharmann 3" Hrz Brg Mill, Steptoe 18" Shaper, South Bend Shaper, Jet 14" Power Hacksaw, B & S (No.4 36") Gear Cutting Mach., Wm Pilton vert. Slotter, Enco 12" horz. saw, McEnglevan MP36 foundry furnace, Rockwell 14"X42" lathe, K&T 2H univ horz. mill

First time I saw "The Champ" anywhere after my garage. You may be asked to say a bit about that setup. De mil'd equip is usually without that info and I see you have the two SS guides. There seems to be two versions. Those blue wheels are origional.