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Jag
Dodge Dakota
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11/20/2004
20:29:30
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 Subject: Best drill bits?
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I am getting ready to tackle the lower ball joint job. I am going to need a mean set of bits to get through the hardened steel rivets in each lower control arm.
Sorta up in the air as what route to go....what kind of bit should I use?
Cobalt?
(Craftsman) Zirconium?
Black Oxide?
Titanium?
HSS?
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Dan M
Dodge Dakota
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11/20/2004
20:53:32
| RE: Best drill bits?
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worst to best
steel bits
high speed (HSS)
Titaniam coated
carbide tipped
cobalt (used mainly for stainless steel and other metals - these are very hard and dispurse heat quickly).
Don't forget to pick up a mean drill if you don't have one already.
- Dan M
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????
Dodge Dakota
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11/20/2004
21:23:54
| RE: Best drill bits?
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Sharp drill bits are truly revolutionary.
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Jag
Dodge Dakota
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11/20/2004
23:24:05
| RE: Best drill bits?
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Meaning what, ????
Thanks, Dan
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DUDE
Dodge Dakota
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11/20/2004
23:29:51
| RE: Best drill bits?
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Meaning he is 13 years old and had to think of something smarta$$ to say.
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.boB
Dodge Dakota
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11/20/2004
23:39:59
| RE: Best drill bits?
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Cobalt bits, cutting oil, and a Drill Dr. sharpener. Nothing on your truck can stand up to that combo.
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prple-gaseatr
Dodge Dakota
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11/21/2004
01:57:12
| RE: Best drill bits?
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yeah, what .boB said, use oil, it will help alot when drilling metals
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daddio
Dodge Dakota
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11/21/2004
11:07:06
| RE: Best drill bits?
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wouldn't a grinder be easier? grind the heads off then punch out the rest. not trying to be a smartazz just a suggestion.
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.boB
Dodge Dakota
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11/21/2004
14:57:52
| RE: Best drill bits?
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No. Take a close look at theose rivit heads. Getting a grinder in there without damaging the arms would be tough. You might be able to do it once or twice, but you have to do it 8 times. Too much of a chance of making an expensive mistake.
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SR
Dodge Dakota
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11/21/2004
15:10:43
| RE: Best drill bits?
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If you're looking to do "surgical grinding" in tight quarters, consider a Dremel tool.
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Jag
Dodge Dakota
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11/21/2004
18:22:31
| RE: Best drill bits?
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Ha! Removing the heads of the rivets is the easy part. Punching them out is a whole nuther story. These rivets aren't getting punched out...there is no way. I removed the rivet heads with a hammer and a chisel, I suppse I need to drill them out.
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HSKR
Dodge Dakota
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11/21/2004
18:26:17
| RE: Best drill bits?
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To damage the control arms enough to hurt anything by using a grinder to take off the rivit heads would mean you had no freaking clue how to use a grinder.
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trent
Dodge Dakota
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11/21/2004
18:49:07
| RE: Best drill bits?
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just used a good HSS drill bit.. make sure it says HSS on the bit. trust me im a millwright i know metals and i know drill bits. just make sure they are sharp and if they are not sharpen them on ur bench grinder
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trent
Dodge Dakota
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11/21/2004
19:14:36
| RE: Best drill bits?
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oh ya i forgot to mention. dan you know nothing about drills.. titanium coated drills suck, the coating does not a thing it wears off first time you cut with it. if your drilling very hard or abrasive material you use a tungsten carbide tipped or solid tungsten carbide drill. and guess what those tungsten carbide drills are made from HSS. So what im sayin is dont even post if you dont know nothing about drills. and yes they are just called DRILLS, ohh and rivits are made from low carbon steel and good drills are made from much harder high carbon steel. also HSS drills and HSS steel contain one or more of the following: chromium, vanadium, molybdenum, tungsten, cobalt.
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dakotaowner01
Dodge Dakota
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11/22/2004
06:06:55
| RE: Best drill bits?
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I would use a carbide metal cutter bit with oil or a grinder...most likely the grinder. Its gonna be real hard to muck up the arm with the grander you may scuff it up but just hit it with some undercoating.
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Dan M
Dodge Dakota
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11/22/2004
08:56:28
| RE: Best drill bits?
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Here's some info from our friends at Bosch.
http://www.boschtools.com/about-bosch-tools/press-room/Bosch+Titanium+Cobalt+and+Black+Oxide+Drill+Bit+Lines+Press+Release.htm
Black Oxide
Bosch designed the new High-Speed Steel Black Oxide drill bits for all-purpose heavy-duty drilling in wood, plastic, carbon and alloy steels, aluminum and soft cast iron. With triple tempered black oxide coating, these Bosch bits will last 50-percent longer than standard uncoated high-speed drill bits. Since heat is the single largest hindrance to the life of a bit, Bosch designed a special coating that gives each bit a high level of lubricity to reduce heat build up and prolong the life of each bit. Whether a professional or serious do-it-yourselfer, precise holes and longer lasting bits make a big difference in any job or project.
And since Bosch understands that time is money, it combined features like a 135-degree spilt point that starts on contact and enlarged flutes with a high helix for faster material removal to make these Black Oxide bits three-times faster than standard drill bits on the market.
Titanium
Designed for repetitive heavy-duty drilling in wood, plastic, common stainless steels, carbon and alloy steels and soft cast iron, the new Bosch titanium drill bit line is the industry’s toughest. By coating each bit with high-speed steel-titanium nitride, Bosch not only made the surface of the bit harder, in excess of 80 HRC(Hardness Rockwell), but also dramatically reduced the amount of heat and friction created between the bit and workpiece. As a result, the bit will last up to six-times longer than standard black oxide bits and drill through more materials.
The Bosch Speed Helix design, an aggressive flute structure engineered to remove material faster, and 135-degree split point that eliminates walking, also make each bit more efficient, with up to three-times faster penetration than bits designed with a Standard Helix. Quicker penetration also means less energy on the part of the drill turning the bit and the user pressing down, which translates into more battery life for a cordless drill/driver and less fatigue on the part of the user.
Cobalt
Hardened stainless steels, cast iron, titanium, wood and plastics are no match for the new Bosch cobalt drill bit line. With a special Bosch cobalt alloy, these new bits resist heat up to 1,100-degrees Fahrenheit, allowing each to last in extremely abrasive materials that would normally destroy any other bit. Further advancing each bits’ efficiency, Bosch also increased the overall bit hardness up to 68 HRC, perfect for penetrating tough or abrasive materials, while a 135-degree split point starts drilling on contact by eliminating walking. And finally, a thicker web design increases the bits overall rigidity to prevent the bit from snapping in hard materials.
...and Lowes
http://www.lowes.com/lkn?action=howTo&p=BuyGuide/DrlBtsBul.html&rn=RightNavFiles/rightNavTools
Drill Bit Materials
The materials from which bits are manufactured play a big role in the life and performance of the bit. Drill bits are available in:
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Steel Bits— inexpensive and work well for boring in softwood. However, steel bits dull quickly in hardwood.
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High-Speed Steel Bits (HSS)— harder than steel blades and stay sharper longer.
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Titanium Coated Bits— cost slightly more than HSS bits, but their titanium coating is tougher and stays sharp longer than HSS or steel bits.
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Carbide-Tipped Bits— more expensive than other bits, but they stay sharp much longer than steel, high-speed steel or titanium bits.
*
Cobalt Bits— extremely hard and dissipate heat quickly, they are most commonly used for boring in stainless steel and other metals.
... and Jamestown distributers (boatbuilding and woodworking supplies)
http://www.jamestowndistributors.com/decoder_bits.asp
Types of Metal for Drill Bits
Carbon Steel is the softest and the least expensive metals that we offer. Also can include High Carbon Steel and High Alloy Steel. many craftsmen like Carbon Steel because it is soft enough to sharpen with a file. Fuller manufactures tools from Carbon Steel that are heat treated to 62c hardness and can not be sharpened with a file. A stone type of a ginding wheel is required to sharpen them. Carbon Steel
Stainless Steel is not normally used to manufacture tools. However, there are some applications where the spring steel quality keeps the tools from breaking and are not that much more expensive than the Carbon Steel. Stainless Steel
High Speed Steel, sometimes abreviated HSS, comes in a variety of different grades generally used in the metalworking industry to make drills, turning tools and other tools to cut metal. In woods and plastics, all grades of HSS far outlast the cheaper Carbon Steel or Stainless Steel. Tools made of High Speed Steel will always have HS or HSS stamped on them. Don't be fooled by imitations! We recommend HSS for most applications because the tools are reasonably priced, last a long time in woods and plastics and have more sizes and lengths available than any other materials. However, if you are cutting thousands of holes in a production application you will need some type of Carbide Tooling.
Carbide Tipped is the materail of choice for high production applications.Carbide is super hard, resharpenable and replaceable. Carbide can cut faster at higher spindle speeds because it is impervious to the heat produced at those speeds.Since Carbide is so hard it is also very brittle and will tend to chip. Carbide Tipped
- Dan M
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