CORONA VIRUS
Banned
- Joined
- Feb 25, 2020
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NC Helix Drill
- Thread starter CORONA VIRUS
- Start date
- Replies 16
- Views 1,606
Mike1974
Diamond
- Joined
- Nov 5, 2014
- Location
- Tampa area
what am i looking at? looks like a regular helix bore toolpath with a fancy insert?
gregormarwick
Diamond
- Joined
- Feb 7, 2007
- Location
- Aberdeen, UK
Practically everything I've ever seen from Nine9 is an (expensive) solution in search of a problem. That looks no different.
Exactly my thoughts when I first saw that video.
CORONA VIRUS
Banned
- Joined
- Feb 25, 2020
Yeah. It seems I may have the problem for this solution. .625" holes in cast steel exiting out the side of the part at 24 degrees.
metalmadness
Hot Rolled
- Joined
- Nov 25, 2015
Kinda, but I use their Nine9 NC spot drill and that thing is great!
CORONA VIRUS
Banned
- Joined
- Feb 25, 2020
Which one do you use?
gregormarwick
Diamond
- Joined
- Feb 7, 2007
- Location
- Aberdeen, UK
If your hole is shallow enough that you can helical drill it with that thing, then it's shallow enough that a half decent insert drill is not going to care about the inclined exit...
Like I said, it's a pointless tool with no really useful application.
metalmadness
Hot Rolled
- Joined
- Nov 25, 2015
dunno the part # right now but its a 5/8" 90degree
CORONA VIRUS
Banned
- Joined
- Feb 25, 2020
The hole is about 2.5" deep. I will be using the shaft style for that depth. We have been using an insert drill. We plunge until the break through and then finish at a lower feed. It works great for about 250 parts (8 holes each part) and then the $700 drill gets structural fatigue and snaps off at the base of the flutes.
gregormarwick
Diamond
- Joined
- Feb 7, 2007
- Location
- Aberdeen, UK
What drill?
Mike1974
Diamond
- Joined
- Nov 5, 2014
- Location
- Tampa area
No shit!? What kind of drill breaks after 250 holes? And why not go with something like this ?
https://www.mscdirect.com/product/details/58556861
Vancbiker
Diamond
- Joined
- Jan 5, 2014
- Location
- Vancouver, WA. USA
Based on his numbers ( 8 holes per part and 250 parts) it breaks at 2000 holes. I’d be in touch with the tool manufacturer to see what they say about that.
Personally, I smell some BS in his post.
Personally, I smell some BS in his post.
gregormarwick
Diamond
- Joined
- Feb 7, 2007
- Location
- Aberdeen, UK
Surely not!
CORONA VIRUS
Banned
- Joined
- Feb 25, 2020
Nope. No BS. Why would you think that? This is cast steel. It is not good cast. We plunge at 6ipm, retract and finish at 1.5ipm. We rotate inserts every 7-8 parts.
gregormarwick
Diamond
- Joined
- Feb 7, 2007
- Location
- Aberdeen, UK
For one thing, I have done all sorts of abuse to insert drills that you can't even imagine, and I have never seen one break off at the base of the flutes.
Why are you retracting?
What is the actual material you're cutting?
What drill?
Vancbiker
Diamond
- Joined
- Jan 5, 2014
- Location
- Vancouver, WA. USA
Breaking the drill body at the base of the flutes in typical use just does not sound believable to me. I’ve seen those get crazily abused right up to being friction welded in a hole and have never seen one break there. Probably the worst failure I can recall is seeing one that split down the web.