Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 02-03-2013, 18:30   #61
Registered User
 
Blue Crab's Avatar

Join Date: Sep 2009
Location: Hurricane Highway
Boat: Cal 29
Posts: 3,882
Re: Drilling SS question.

I saw it but this is the INTERNET.
__________________

__________________
Blue Crab is offline   Reply With Quote
Old 02-03-2013, 18:33   #62
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Drilling SS question.

Quote:
Originally Posted by Cotemar View Post
Sweet square hole drill.
I used to be a machinist and have never had a need for that, but must be a need somewhere. We used to use a broach for square slots.
When you have a blind hole, then a broach will not work. I've used broaches for making internal planetary gears. It sure speeds up production.

Now here's some extreme machining. These chips are coming off red hot. But they're using a special carbide tool.

Notice the water lines. Those are for when using HSS/cobalt cutters. Carbide cutters will crack if you use coolant.

__________________

__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 02-03-2013, 18:44   #63
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Drilling SS question.

FYI

If one has a couple hundred $ to spare and a compressor available, this is the preferred cooling system out there that Machinist's worldwide use for general purpose cooling for drilling and milling, even some lathe work. On table saws it can be added for cutting aluminum plate.


Kool Mist - Kool Mist General Purpose Models with Stainless Tank
Attached Thumbnails
Click image for larger version

Name:	photo110906171341.jpg
Views:	49
Size:	15.2 KB
ID:	55996  
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 02-03-2013, 18:45   #64
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Re: Drilling SS question.

Trochoidal Machining makes sense as it’s not a full plunge cut. No chatter, less force and better surface finish
Much less chip load and the heat is in the chips not the part.
Nice
__________________
Cotemar is offline   Reply With Quote
Old 02-03-2013, 19:02   #65
Marine Service Provider

Join Date: Jan 2011
Location: Eldean Shipyard, Holland, MI
Boat: 1977 Pearson 30
Posts: 113
Re: Drilling SS question.

Quote:
Originally Posted by delmarrey View Post
Now here's some extreme machining. These chips are coming off red hot. But they're using a special carbide tool.

Notice the water lines. Those are for when using HSS/cobalt cutters. Carbide cutters will crack if you use coolant.
I am going to respectfully disagree, but just a little. The main reason for using high pressure air in this situation is to keep from re-cutting the chips. Re-cutting chips will cause very premature tool failure. The high pressure air is more effective at removing the chips than a coolant flood.

If a carbide end mill is being used properly, the heat will all be put into the chips. The tooling should only have heat at the cutting edge. The work piece should remain cool. New(er) CNC mills are capable of pumping very high volumes of coolant. These high volumes prevent the carbide fracturing that used to be a problem. We flood all of our machining operations in our enclosed machining centers.

Something else that may be interesting is that carbide drills have coolant holes running through them that are fed with very high pressure coolant through the spindle. Pressures can exceed 1,500 psi depending on the pumps in the machine. We are able to drill through 2" of tool steel without "pecking" the drill with a .437" drill spinning about 1,800 rpm at 25+ inches per minute.
__________________
Anonymous7500 is offline   Reply With Quote
Old 02-03-2013, 19:03   #66
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,330
Re: Drilling SS question.

Hey Blue Crab, wanna have a beer while the machinists finish off here
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 02-03-2013, 19:08   #67
Registered User
 
Blue Crab's Avatar

Join Date: Sep 2009
Location: Hurricane Highway
Boat: Cal 29
Posts: 3,882
pirate Re: Drilling SS question.

Quote:
Originally Posted by Wotname View Post
Hey Blue Crab, wanna have a beer while the machinists finish off here

Yes sir! I'm buyin!
__________________
Blue Crab is offline   Reply With Quote
Old 02-03-2013, 19:08   #68
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Re: Drilling SS question.

Quote:
Originally Posted by Wotname View Post
Hey Blue Crab, wanna have a beer while the machinists finish off here
I am not a machinest anymore. Lets go for that beer
__________________
Cotemar is offline   Reply With Quote
Old 02-03-2013, 19:11   #69
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Drilling SS question.

Quote:
Originally Posted by Anonymous7500 View Post
I am going to respectfully disagree, but just a little. The main reason for using high pressure air in this situation is to keep from re-cutting the chips. Re-cutting chips will cause very premature tool failure. The high pressure air is more effective at removing the chips than a coolant flood.

If a carbide end mill is being used properly, the heat will all be put into the chips. The tooling should only have heat at the cutting edge. The work piece should remain cool. New(er) CNC mills are capable of pumping very high volumes of coolant. These high volumes prevent the carbide fracturing that used to be a problem. We flood all of our machining operations in our enclosed machining centers.

Something else that may be interesting is that carbide drills have coolant holes running through them that are fed with very high pressure coolant through the spindle. Pressures can exceed 1,500 psi depending on the pumps in the machine. We are able to drill through 2" of tool steel without "pecking" the drill with a .437" drill spinning about 1,800 rpm at 25+ inches per minute.
Your probably right, as for the video. I'm just trying to keep it simple for the laymen here. If we get to deep they'll run out of air. Many times I've just used an air nozzle when doing small end mill work.

Quote:
Originally Posted by Wotname
Hey Blue Crab, wanna have a beer while the machinists finish off here
What about us? We're doing the educating.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 02-03-2013, 19:15   #70
Registered User
 
Blue Crab's Avatar

Join Date: Sep 2009
Location: Hurricane Highway
Boat: Cal 29
Posts: 3,882
pirate Re: Drilling SS question.

Quote:
Originally Posted by delmarrey View Post
What about us? We're doing the educating.

Yep, yep and yep. It really would be great to meet everyone.
__________________
Blue Crab is offline   Reply With Quote
Old 02-03-2013, 19:46   #71
Registered User

Join Date: Nov 2011
Location: Montegut LA.
Boat: Now we need to get her to Louisiana !! she's ours
Posts: 3,421
Re: Drilling SS question.

I don't drink beer, but will drink something, and enjoy the BS LOL
__________________
Bob and Connie
bobconnie is offline   Reply With Quote
Old 02-03-2013, 19:52   #72
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,330
Re: Drilling SS question.



And get to meet a few hard-core machinists (and ex ones) and the general riff raff (like me )
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 04-03-2013, 22:41   #73
Registered User
 
Hoohaa's Avatar

Join Date: Jul 2011
Location: Sydney Aus
Boat: Swarbrick 40
Posts: 518
Images: 10
Re: Drilling SS question.

Job Done..
Drilled the bow roller at home on the drill press, pilot holes and then a 10mm bit. before you ask, I got the bits given to me by my freinds son who manages a machine shop. I will find out what they were and let you know. I did buy a cobult and 2 other bits which I never used.
Here are some pics.
Stage 1
Click image for larger version

Name:	DSCF3257.jpg
Views:	54
Size:	422.3 KB
ID:	56215Click image for larger version

Name:	DSCF3260.jpg
Views:	47
Size:	217.0 KB
ID:	56216

Click image for larger version

Name:	DSCF3261.jpg
Views:	56
Size:	219.3 KB
ID:	56217
Stage 2
Used this really good cordless drill with no pilot holes and a mistery cutting fluid that I will post the name of as soon as I find out.
Click image for larger version

Name:	DSCF3263.jpg
Views:	79
Size:	229.5 KB
ID:	56218Click image for larger version

Name:	DSCF3265.jpg
Views:	55
Size:	314.4 KB
ID:	56219

Click image for larger version

Name:	DSCF3267.jpg
Views:	70
Size:	221.8 KB
ID:	56220Click image for larger version

Name:	DSCF3268.jpg
Views:	56
Size:	233.5 KB
ID:	56221

Click image for larger version

Name:	DSCF3270.jpg
Views:	86
Size:	195.0 KB
ID:	56222

Can't wait to install the new Anchor.
Thanks for all the great tips, I think Its time I had a bear.
Click image for larger version

Name:	DSCF3277.jpg
Views:	52
Size:	408.2 KB
ID:	56223
__________________
Drinking hot tea on a hot day is like banging your head against a wall . It feels good when you stop.... "Terry" my dad.
Hoohaa is offline   Reply With Quote
Old 04-03-2013, 22:45   #74
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Drilling SS question.

Congratulations for digging your way through all the confusion and just getting it done.
__________________
The Blue Dot Campaign. This Changes Everything.
DeepFrz is offline   Reply With Quote
Old 05-03-2013, 06:54   #75
Registered User
 
Cotemar's Avatar

Join Date: Dec 2007
Boat: FP, Helia 44 Evo
Posts: 5,717
Re: Drilling SS question.

Nice job. We are so glad you did not listen to us
__________________

__________________
Cotemar is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 18:25.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.