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trepan tool?
- Thread starter celsoari
- Start date
- Replies 8
- Views 2,674
johnoder
Diamond
- Joined
- Jul 16, 2004
- Location
- Houston, TX USA
Probably not DIY
Three facet cutting tool and carbide wear pads for "head"
There is way more to it though - like reliably evacuating fountain of chips coming off that tool. This is done with high pressure coolant pump(s) and large volumes of coolant
Since the coolant is under pressure, you have to have rotating induction head(s) to get it to where the cutting is being done
This double end shop built trepanner cost Drilco a fortune in the 1970s
Milland
Diamond
- Joined
- Jul 6, 2006
- Location
- Hillsboro, New Hampshire
This man is the God of Trepanning: David Wilks on YouTube
Watch his videos on trepanning and tool manufacture/repair. You'll yearn all you need to know, just listen carefully and pay attention.
Watch his videos on trepanning and tool manufacture/repair. You'll yearn all you need to know, just listen carefully and pay attention.
Nice tie ya got's there Mr. Oder....
The pix's are very helpful nonetheless. Thanks for posting them.
Back to the OP...poke around here for some pictures of the process:
Home – American Hollow Boring
johnoder
Diamond
- Joined
- Jul 16, 2004
- Location
- Houston, TX USA
Related thread
https://www.practicalmachinist.com/...built-houston-1975-a-286243/?highlight=Drilco
Post #13 has a link to patent on "head"
https://www.practicalmachinist.com/...built-houston-1975-a-286243/?highlight=Drilco
Post #13 has a link to patent on "head"
johnoder
Diamond
- Joined
- Jul 16, 2004
- Location
- Houston, TX USA
Another related thread - some repetition as to images
ON TOPIC Meaning of Trepanning and Trepanning Tool
ph
ON TOPIC Meaning of Trepanning and Trepanning Tool
ph
indianamoon
Aluminum
- Joined
- May 27, 2010
- Location
- South Bend
We used to
make special tools and hold them in a boring head.
make special tools and hold them in a boring head.
JACKIE SCHMIDT
Plastic
- Joined
- Feb 14, 2008
- Location
- Houston Texas
We make a lot of tiller hubs as well as large nuts. We start with a solid bar and use these tools to core a hole in the piece. We have made them to core 3 inches to 7 inches.
It has a single carbide insert with a power coolant feed, so the actual cutting force is really not that great. The body of the tool is carburized so it will last.
The Cored drop comes out when the tool is retracted.
As you can see, we use these tools in our big Turret Lathe.
https://www.practicalmachinist.com/vb/attachments/f38/289990d1590686069t-trepan-tool-image.jpg
https://www.practicalmachinist.com/vb/attachments/f38/289991d1590686120t-trepan-tool-image.jpg
https://www.practicalmachinist.com/vb/attachment.php?attachmentid=289992&d=1590686237&thumb=1&stc=1
If the piece is longer than the tool, we simply Core half way and turn it around .
The drops ar what comes out.
It has a single carbide insert with a power coolant feed, so the actual cutting force is really not that great. The body of the tool is carburized so it will last.
The Cored drop comes out when the tool is retracted.
As you can see, we use these tools in our big Turret Lathe.
https://www.practicalmachinist.com/vb/attachments/f38/289990d1590686069t-trepan-tool-image.jpg
https://www.practicalmachinist.com/vb/attachments/f38/289991d1590686120t-trepan-tool-image.jpg
https://www.practicalmachinist.com/vb/attachment.php?attachmentid=289992&d=1590686237&thumb=1&stc=1
If the piece is longer than the tool, we simply Core half way and turn it around .
The drops ar what comes out.
