expired Posted by TattyBear | Staff • Jun 7, 2023
Jun 7, 2023 10:57 PM
Item 1 of 1
expired Posted by TattyBear | Staff • Jun 7, 2023
Jun 7, 2023 10:57 PM
14-Piece DeWALT DWA1184 Black & Gold Drill Bit Set
$11
$25
56% offAmazon
Visit AmazonGood Deal
Bad Deal
Save
Share
Top Comments
25 Comments
Sign up for a Slickdeals account to remove this ad.
Yes, you can resharpen most bits, however once the special coating is gone you lose it's advantages and are just left with the base metal which is often relatively unimpressive on these coated bits.
https://slickdeals.net/share/iphone_app/fp/826466
Carbon Steel
High-Speed Steel
Titanium
Cobalt
Carbide
Knowing SD, people will debate the order a little bit. Regardless, HSS will dull while drilling through any material faster than Carbide.
Titanium drills have a titanium coating on HSS, and other factors seem more important (design, geometry, quality control). Black oxide provides rust resistance to HSS and apparently lessens friction.
Cobalt isn't just a coating, but a steel alloy that includes typically 5-8% cobalt, and can deal with harder materials. Carbide drills can deal with the hardest materials and most of these are carbide tips on some type of steel drill to reduce cost.
Sign up for a Slickdeals account to remove this ad.
COMOWARE Cobalt Drill Bit Set- 13Pcs https://a.co/d/5HSvyvY
COMOWARE Cobalt Drill Bit Set- 13Pcs https://a.co/d/5HSvyvY