Slotting with a 3/64 Endmill

[Herding Cats]

I got nothing to add to the slotting stuff, but can I ask what it is?

2 piece valve covers for Ford D3's. The base has spring oilers to cool the valve springs. Expensive pieces but they go on 900hp 9000rpm engines that cost close to $60K a pop so a couple grand for valve covers is a drop in the hat.

 

[Kustomizer]

Looks like it goes over a cylinder head and under a valve cover

 

[Herding Cats]

 

[mach ramsey mn]

The first couple of pictures you posted I was looking at them and I kind a picked up a SBF like pattern! Cool part! Always adds to the fun factor when you’re making a cool part.
(And yes, I do think machining is fun!)

 

[Kustomizer]

The first couple of pictures you posted I was looking at them and I kind a picked up a SBF like pattern! Cool part! Always adds to the fun factor when you’re making a cool part.
(And yes, I do think machining is fun!)

I see your young yet

after some decades it is just a job

 

[mach ramsey mn]

57 years young! Been removed from day to day hands on for for a while. I love doing it, the problem solving, work holding, programming techniques. Got a small shop out back hope to get a machining center moved in there this spring…

 

[Herding Cats]

They will end up in dirt super late models.

https://www.facebook.com/video.php?v=744703510897338

 

[Kustomizer]

57 years young! Been removed from day to day hands on for for a while. I love doing it, the problem solving, work holding, programming techniques. Got a small shop out back hope to get a machining center moved in there this spring…

A sickness, without a pill

 

[lobust]

Are you allowed a plunge hole with the dovetail or are you forced to use one that's small enough to plunge into the slot?

I had to do a 2mm dovetail groove in a semi-similar part but in 316 for an rov tool a few years back, standard tool available off the shelf but was full width and required a plunge hole, client would not accept and had to get customs ground that were really fragile. I tried multiple times explaining to them how that decision was driving the cost through the stratosphere but they didn't care.

 

[Herding Cats]

Are you allowed a plunge hole with the dovetail or are you forced to use one that's small enough to plunge into the slot?

I had to do a 2mm dovetail groove in a semi-similar part but in 316 for an rov tool a few years back, standard tool available off the shelf but was full width and required a plunge hole, client would not accept and had to get customs ground that were really fragile. I tried multiple times explaining to them how that decision was driving the cost through the stratosphere but they didn't care.

The tool I'm using requires a drop hole, but it is still rediculously fragile looking.

I probably should have looked for a NSK planet 800 i think, which is something like 150k-200k rpm. That would have put me up around the 2000 sfm or better mark

 

[Mud]

I haven't seen a used 800. That doesn't mean you can't find one though. How does the 550 handle the cutting load, does it slow much?

 

[Herding Cats]

I haven't seen a used 800. That doesn't mean you can't find one though. How does the 550 handle the cutting load, does it slow much?

Not bad once you get the oiling right. Too much oil is detrimental to the power. Around a drop every 20 seconds seems to be ideal. I think a larger and shorter air line would increase power as well.

As I said before I can't really push it too hard till I replace the spindle bearings. The unit came with a used set of spindle bearing in the box so I suspect it was rebuilt in house and set up with the incorrect preload. I'll fool with it when I have time, which is prob never

 

[DavidScott]

My experience is Harvey makes far tougher 3 flute aluminum specific end mills than Destiny. With the right conditions I think Harvey's feeds are sound. If memory serves the right end mill for their 1/16" dovetail is .055".

 

[mach ramsey mn]

How is the air compressor holding up??? Suppose you have a 100 cfm screw or something like that???

 

[Herding Cats]

How is the air compressor holding up??? Suppose you have a 100 cfm screw or something like that???

The spec sheet calls for under 10 cfm. I have a 3 piston compressor that is under driven and making around 40 cfm. I have it on a 40hp vfd and can throw a larger motor on it and get it up over 100 cfm if the need was ever there.

 

[Herding Cats]

My experience is Harvey makes far tougher 3 flute aluminum specific end mills than Destiny. With the right conditions I think Harvey's feeds are sound. If memory serves the right end mill for their 1/16" dovetail is .055".

Sounds about right. .057 over theoretical edge and .0624 over actual rad

 

[Garwood]

I've not had much luck with tiny crossection oring seals in a face like that. Are there tricks to it like super soft oring material or something?

I make a power steering pump drive that uses a standard oring for a static seal. The oring had to fit in a .200" space so initially I used a 1.5mm crossection oring. That fucker leaked way too often. Like 1 in 3 weeped. went to a 4mm section oring and all problems disappeared.

 

[Herding Cats]

I've not had much luck with tiny crossection oring seals in a face like that. Are there tricks to it like super soft oring material or something?

I make a power steering pump drive that uses a standard oring for a static seal. The oring had to fit in a .200" space so initially I used a 1.5mm crossection oring. That fucker leaked way too often. Like 1 in 3 weeped. went to a 4mm section oring and all problems disappeared.

Only thing I can think of is getting the depth right. This oring is under vacuum and does not leak as you would see dirt getting past it going into the motor.

I can tell you this sucker sits pretty proud of the surface. The dovetail deforms it and makes it puff up above the surface.

 

[mach ramsey mn]

More cross section to compress. I’ve bought o rings from precision associates in a previous life. Their tech support was awesome! Tell them what you were trying to do and the fit up they would give you size, tolerance, and surface finish.

 

[mach ramsey mn]

Herding, how did you come out on this? Did the speeder head make it through the end? Did you do the finishing with the speeder?