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Sharp drill bits make or break a drill line and the Ocean Avenger is
no different. The difference between a sharp drill bit and a dull
drill bit, is night and day.
We have two different
approaches to sharpening twist drill bits.
A. NEW video - for Ocean PENETRATOR drill
bits (simple 1-stage sharpening)
B. OLD video - for Nachi or Cleveland drill
bits (complex 2-stage sharpening)
If you have never
tried the new Ocean PENETRATOR Drill bits we suggest you give them a
try. These new drill bits.....
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Are much faster to
sharpen (only one process)
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Require a faster
feed rate (approx 20-30%) and therefore drill faster than
regular twist drill bits
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Eliminate long
stringy chips that fling off the spindle, and take so much space
in the chip-drawer
Call Karen at 1-800
286 3624 to order your Ocean Penetrator
Drill Bits
A.
New Drill Sharpening Video - For Ocean Penetrator Drill Bits
This new video has
been specifically created to assist operators in sharpening the NEW
Ocean PENETRATOR drill bits. These drill bits feature a chip breaker
that eliminates the long stringy chips, and allows faster cleaner
drilling.
The special design
creates a narrow web, and this eliminates the complex sharpening
that is required with regular twist drill bits.
NEW
Drill Grinding Tutorial Video for Ocean Penetrator Drill bits
Note on Drill Sharpening Video
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These videos will
stream from our server, allowing you to play them directly, but it might be more advisable to
"right
click and save as" to your hard drive, so that you always have
the video as a reference. Select a suitable directory to store
them in or store it directly on your desktop.
-
NEW Drill Grinding
Tutorial Video - 33Mb
All videos require
Windows Media 9 or higher - click here for the
latest version of Windows Media Player
(free download).
Drill Grinding Tips
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We recommend you
switch out your drill bits before they get dull, that way you
will only have to do a light dressing / resharpening to get them
back into service. If you wait too long and continue to use them while they
are dull, you will have to spend more time on the grinder doing
the resharpening.
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Tell tale signs
that your drill is getting dull include.....
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the drilling
time per hole starts to increase
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steam starts
emanating from the tip of the drill bit
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a blue color
starts appearing on the chips / curly cues / discs
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a blue color
starts appearing on the cutting surface of your drill
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a harmonic
noise/vibration starts emanating coming from the drill bit
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You should get
approximately 300 plus holes per sharpening. Of course your own
actual mileage may vary considerably from these numbers.
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You should also
adjust your drilling feed rate on your Ocean Avenger Drill Line
to get the best compromise between drilling time and the number
of holes drilled per sharpening. Increasing the feed rate
increases the amount of metal removed, but reduces the number of
holes per sharpening.
B. OLD Drill Sharpening Tutorial Video for Regular Twist Drill
Bits
The Ocean Avenger is
normally supplied with a Rush 250A or Rush 132C drill Grinder. The
drill Grinding Tutorial Video below will show you how to sharpen
your drills and achieve the ideal drill point geometry for
Structural Steel, using the Rush 250A. The sharpening approach for
the Rush 132C is very similar to the 250A.
Please note the
following
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In the video (at
2mins 13 secs), we make mention of the front clearance relief
angle selector where we say that this setting should not change
- This is incorrect - please consult the manual supplied
with your drill and adjust this setting according to the drill
diameter
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Follow the
directions in the video - adjust the center point height to suit
- too flat and the drill will not center well - too high and the
drill point will wear too fast.
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All Rush 250A drill grinders supplied after July
2004 have a steel wheel with diamond abrasive coating. The diameter
of this wheel does not change - of course the coating wears out and
the wheel has to be replaced periodically, depending on the amount
of drilling and sharpening you do. Because the wheel diameter does
not change all settings remain constant for each drill diameter. If
you have an older style consumable abrasive wheel, the diameter will
change with time and all settings must be adjusted accordingly.
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You can achieve great drill performance using
several different approaches to drill grinding. We recommend that
you experiment with your own approach and narrow down your own style
of drill grinding. Drill grinding is as much an art as a science.
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You should also adjust your drilling feed rate on
your Ocean Avenger Drill Line to get the best compromise between
drilling time and the number of holes drilled per sharpening
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If you are suing Nachi or Cleveland drill bits you
will need to complete all 3 steps in the video, to create the
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1. raised center point,
2. relieved heel, and
3. thinned web |
Ocean Avenger
Drill Grinding Tutorial Video
Note on Drill Grinding Video
-
These videos will
stream from our server, allowing you to play them directly, but it might be more advisable to
"right
click and save as" to your hard drive, so that you always have
the video as a reference. Select a suitable directory to store
them in or store it directly on your desktop.
-
Old Drill Grinding
Tutorial Video - 30Mb
All videos require
Windows Media 9 or higher - click here for the
latest version of Windows Media Player
(free download).
Drill Grinding Tips
-
We recommend you
switch out your drill bits before they get dull, that way you
will only have to do a light dressing / resharpening to get them
back into service. if you wait too long and run them while they
are dull, you will have to spend more time on the grinder doing
the resharpening.
-
Tell tale signs
that your drill is getting dull include.....
-
the drilling
time per hole starts to increase
-
steam starts
emanating from the tip of the drill bit
-
a blue color
starts appearing on the chips / curly cues / discs
-
a blue color
starts appearing on the cutting surface of your drill
-
a harmonic
noise/vibration starts emanating coming from the drill bit
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Once you have done
a complete sharpening
of the drill bit as per our video above (i.e. grinding the
cutting face, relieving the heel and thinning the web), you will
be then be able to get approximately 10 LIGHT DRESSINGS of the
drill bit primary cutting surface before you need to do a
complete sharpening
again.
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You should get at
least 300 plus holes per dressing, and 10 dressings per
complete sharpening,
giving you approximately 3000 holes before you need to
relieve the heel and thin the web again. Of course your own
actual mileage may vary considerably from these numbers.
-
You should also
adjust your drilling feed rate on your Ocean Avenger Drill Line
to get the best compromise between drilling time and the number
of holes drilled per sharpening. Increasing the feed rate
increases the amount of metal removed, but reduces the number of
holes per sharpening.
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