End Mill Grinding Fixture
End Mill Grinding Fixture
I am looking for drawings and ideas to build my own fixture to sharpen end mills using a surface grinder
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Here is one. This sharpens the ends of 2, 4 and 6 flute endmills. I bought one just like it on Ebay for $10
http://www.use-enco.com/CGI/INSRIT?PMAK ... TPG=INLMK3
Jim
http://www.use-enco.com/CGI/INSRIT?PMAK ... TPG=INLMK3
Jim
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- endmill sharpener.jpg (9.87 KiB) Viewed 7354 times
Tool & Die Maker/Electrician, Retired 2007
So much to learn and so little time.
www.outbackmachineshop.com
So much to learn and so little time.
www.outbackmachineshop.com
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- Posts: 1760
- Joined: Sat Dec 21, 2002 12:16 am
- Location: Green Bay Wisconsin USA
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When in the 'primary position" (almost vertical !) you grind the first angle, rotate the cutter and grind the next flute (ie 4 times).
The you tilt the block (mag table required) and grind the secondary relief angles, again one at a time (ie ..rotate,grind,rotate)
The block is not a 90 degree angle as it seems in the photo
Rich
The you tilt the block (mag table required) and grind the secondary relief angles, again one at a time (ie ..rotate,grind,rotate)
The block is not a 90 degree angle as it seems in the photo
Rich
Brentin,
You can use a spin index type attachment, but you have to rig an adjustable finger at the wheel head to follow the flute.
A carbide finger works best.
You have to use the table traverse to work like this.
That is a tricky operation and guaranteed to have a learning curve.
I recommend use of a face shield when you start out.
I have a self contained fixture using a hardened, and ground, endmill holder bar with plungers like vee blocks making two steady rests to hold the bar that works ok with larger mills. That was a commercial unit that Enco, or Msc may carry.
I'll post a picture if I get a chance tonight.
A weldon air bearing type fixture works best but is pricy, the tolerances, and fits may be beyond the home shop.
Kap
You can use a spin index type attachment, but you have to rig an adjustable finger at the wheel head to follow the flute.
A carbide finger works best.
You have to use the table traverse to work like this.
That is a tricky operation and guaranteed to have a learning curve.
I recommend use of a face shield when you start out.
I have a self contained fixture using a hardened, and ground, endmill holder bar with plungers like vee blocks making two steady rests to hold the bar that works ok with larger mills. That was a commercial unit that Enco, or Msc may carry.
I'll post a picture if I get a chance tonight.
A weldon air bearing type fixture works best but is pricy, the tolerances, and fits may be beyond the home shop.
Kap
Fadal Turn, Fadal Vmc 15, Prototrak 16 x 30 Cnc Lathe, Pratt and Whitney 16 x 54 lathe, Pratt and Whitney Vertical Shaper, G & E 16" Shaper, B & O Electric turret lathe, 36" Doall band saw,
Enco B.P. Clone, Bridgeport CNC Mill, Delta 12" Surface Grinder.
Enco B.P. Clone, Bridgeport CNC Mill, Delta 12" Surface Grinder.
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- Posts: 2281
- Joined: Sat Jan 04, 2003 8:33 pm
- Location: 40 Miles West of Chicago/near DeKalb
- Contact:
The step fixture shown indexes. The secondary clearance angle is ground first then the primary clearance angle last.
It indexes via a spring loaded ball. The collar around the 5C collet is knurled for rotating by hand. There are dedents in the fixture the ball locates with. The spring loaded ball retracts while indexing then drops into the next dedent to locate the index. The endmill rotates with the fixture and the height stays the same with each index. You plunge grind each flute to the same depth. It is simple to use and works quite well.
However, I only use it when I have absolutely nothing else to do or in emergencies. New endmills are to cheap to spend valualble time sharpening used ones. But, I do use it.
Just for the record, I tried using a cheap 5C indexer to sharpen endmills and it did not work. Too much endplay in the fixture causing each flute to have a different hgight.
Jim
It indexes via a spring loaded ball. The collar around the 5C collet is knurled for rotating by hand. There are dedents in the fixture the ball locates with. The spring loaded ball retracts while indexing then drops into the next dedent to locate the index. The endmill rotates with the fixture and the height stays the same with each index. You plunge grind each flute to the same depth. It is simple to use and works quite well.
However, I only use it when I have absolutely nothing else to do or in emergencies. New endmills are to cheap to spend valualble time sharpening used ones. But, I do use it.
Just for the record, I tried using a cheap 5C indexer to sharpen endmills and it did not work. Too much endplay in the fixture causing each flute to have a different hgight.
Jim
Tool & Die Maker/Electrician, Retired 2007
So much to learn and so little time.
www.outbackmachineshop.com
So much to learn and so little time.
www.outbackmachineshop.com
Benton,
Here are some pictures of the Yusa Endmill Grinding Attachment.
Kap
Here are some pictures of the Yusa Endmill Grinding Attachment.
Kap
Fadal Turn, Fadal Vmc 15, Prototrak 16 x 30 Cnc Lathe, Pratt and Whitney 16 x 54 lathe, Pratt and Whitney Vertical Shaper, G & E 16" Shaper, B & O Electric turret lathe, 36" Doall band saw,
Enco B.P. Clone, Bridgeport CNC Mill, Delta 12" Surface Grinder.
Enco B.P. Clone, Bridgeport CNC Mill, Delta 12" Surface Grinder.
Here's one on ebay similar the the one Jim posted a picture of.
http://tinyurl.com/yljq7u
Only about 1 1/2 days left as of this posting. Bid is at $9.06 + about $15 shipping. Includes 10 collets.
http://tinyurl.com/yljq7u
Only about 1 1/2 days left as of this posting. Bid is at $9.06 + about $15 shipping. Includes 10 collets.