Rotary hammer bits have carbide tips and should do a lot more than 20 holes. I don’t resharpen them but it should be possible.
The downside is they are really poor at going through wood or any material other than masonry, you need to switch to a regular bit for that. Even in a hammer drill, you are probably using carbide tip bits, just not SDS shank. From: Mike Hammett Sent: Thursday, June 04, 2015 6:39 AM To: [email protected] Subject: Re: [AFMUG] Sharpening Drill Bits Given Steve's reputation, I'm not sure what we're talking about re: $46 for 20 holes. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com -------------------------------------------------------------------------------- From: "That One Guy /sarcasm" <[email protected]> To: [email protected] Sent: Wednesday, June 3, 2015 10:17:31 PM Subject: Re: [AFMUG] Sharpening Drill Bits Rotary hammers, fucking beasts. We were talking about our tapered bits. We have tons with one dull ring. 46 bucks for 20 holes adds up. On Jun 3, 2015 10:00 PM, "Jason McKemie" <[email protected]> wrote: I must have never used a rotary hammer then, hammer drills seem to work just fine for stone, masonry, etc. On Wednesday, June 3, 2015, Ken Hohhof <[email protected]> wrote: Rotary hammer very different beast than hammer drill which is only good for stuff like tapcons. From: Jason McKemie Sent: Wednesday, June 03, 2015 8:08 PM To: [email protected] Subject: Re: [AFMUG] Sharpening Drill Bits Yeah, never use anything but a hammer drill on stone/concrete/etc. On Wednesday, June 3, 2015, Josh Reynolds <[email protected]> wrote: What you want for the concrete is a rotary hammer. A little spendy and the bit cost is astronomical, but they will bite through granite like it's nothing in seconds. We use rotary hammers for rohn wall mount kits going into brick, concrete, and stone. Have only tried the corded hitachi's, although dewalt has a cordless one I've been keeping my eye on. http://www.amazon.com/Hitachi-DH40MRY-16-inch-Rotary-Hammer/dp/B000XVINQY/ref=sr_1_4?ie=UTF8&qid=1433378353&sr=8-4&keywords=hitachi+rotary+hammer is what we've used. http://www.amazon.com/DEWALT-DCH253M2-Mode-Rotary-Hammer/dp/B00DD1UOTU/ref=sr_1_9?ie=UTF8&qid=1433378421&sr=8-9&keywords=dewalt+rotary+hammer is the one I've had my eye on. Josh Reynolds CIO, SPITwSPOTS www.spitwspots.comOn 06/03/2015 02:37 PM, Jaime Solorza wrote: We are trying different brands for 3/32 holes we need for door contacts and switches. Metal is tough then we hit concrete on door frame. Slow speeds and oil helps but we eat them up. For concrete and cinder block walls Hilti drill and bits have no problem. Jaime Solorza On Jun 3, 2015 4:26 PM, "Chuck McCown" <javascript:_e(%7B%7D,'cvml','[email protected]');> wrote: You can do it by hand with a bit of practice. From: Glen Waldrop Sent: Wednesday, June 03, 2015 4:24 PM To: javascript:_e(%7B%7D,'cvml','[email protected]'); Subject: Re: [AFMUG] Sharpening Drill Bits My dad has always sharpened his own, so I tend to do the same. In my experience, if used in wood they can be sharpened with little issue. If you drill through metal, buy a new one. It loses some of the hardness on the edge. It really needs to be tempered again after sharpening. ----- Original Message ----- From: Rory Conaway To: javascript:_e(%7B%7D,'cvml','[email protected]'); Sent: Wednesday, June 03, 2015 5:18 PM Subject: [AFMUG] Sharpening Drill Bits We are paying $15-$25 for longer drill bits. When they start to get dull, just wondering if anyone has had success sharpening them or do you just buy new ones? Rory Conaway • Triad Wireless • CEO 4226 S. 37th Street • Phoenix • AZ 85040 602-426-0542 [email protected] www.triadwireless.net “You may be an engineer if your idea of good interpersonal communication means getting the decimal point in the right place.” – Unknown
