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 > <javascript:_e(%7B%7D,'cvml','[email protected]');> > *Sent:* Wednesday, June 03, 2015 8:08 PM > *To:* [email protected] <javascript:_e(%7B%7D,'cvml','[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] > <javascript:_e(%7B%7D,'cvml','[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, SPITwSPOTSwww.spitwspots.com >> >> On 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 <602-426-0542>* >>> >>> *[email protected]* >>> >>> *www.triadwireless.net <http://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* >>> >>> >>> >>> >>
