I.D. Oil Groove

[Tim Simmermon]

I wanted to see what you guys felt was the best way to turn an I.D. Oil Groove. It is basically a large pitch thread made with a full radius grooving tool. I don't have the part drawn yet, but I can try to scan in the print if that would help. I hoped from my vague description, someone might know what I'm talking about. The I.D. of the part is 6.450".

 

Thanks

[calnet42]

I.D. oil groove like these?

(larger id of course)

 

Carr-lane

 

My first thought would be to use a full rad. top-notch style insert.

 

MSC Kennametal

 

 

you would have to watch the relief angle, I think it is 7-11 deg. which may not be enough.

[jeff]

Calvin is right,

I've done this many times.

Like he said, watch the relief angle!

Depending on how fast your pitch is,it will rub on the side of the insert.

[Randy Morton @ Clem Industrial]

The top notch work really well =] I have done this lots, with barely ever an issue. Iscar makes a really good ID grooving bar that we have been using. Basically it's like a parting blade being held in a boring bar. They are very strong, fast, and best of all, the come built for flat for or full radius'd inserts!

 

Iscar's blade p/n is CGHN-32-5GGM...page 42-44 of the Turning Tools book. The bars are on there as well, and we use a 2" bar for this blade.

 

HTH

[Tim Simmermon]

Thanks guys.

 

Calnet - It is a figure 8 type oil groove.

 

Jeff and Randy - That is how I figured on doing it. Full radius with a threading cycle. The relief angle will definitely be an issue on 1 of the grooves (1 revolution per 3.50")

 

For the figure 8 do you guys use a thread cycle with 2 starts?

[jeff]

For the figure 8, it's hard for me to say because my memory isn't that good.

Try a 2 start, if that doesn't work, you could move your start point 1/2 pitch I believe.

[garyg]

What type of machine are you running? Does it have a C axis? Easily done if it is.

[Tim Simmermon]

garyg,

 

The machine is a Daewoo Puma 300 LB - No C Axis.

 

Thanks for everyone's help!

[Guest CNC Apps Guy 1]

You'll have a 192 IPM feedrate clamp on a Fanuc Control unless you're milling it FYI.

[Tim Simmermon]

Thanks James,

 

I was thinking I might have a problem with that.