I use a drill doctor also, but with the ability to do a split point. I have found the split point to help immensely in getting the bit started.
On Wed, Jun 3, 2015 at 9:34 PM, Jay Weekley <par...@cyberbroadband.net> wrote: > I was doing some cable work on the second story of our local bank and had > to drill some holes through the floor and rented a rotary hammer for the > job. I forgot to tell the folks in neighboring offices that I was about to > set that thing off for the first hole. Some poor lady showed up in the door > of the room I was working in with eyes as big as saucers and a very > startled look on her face. For subsequent holes I ran from office to office > warning everyone prior to drilling the hole. > > That One Guy /sarcasm wrote: > >> >> 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" < >> j.mcke...@veloxinetbroadband.com <mailto:j.mcke...@veloxinetbroadband.com>> >> 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 <af...@kwisp.com >> <mailto:af...@kwisp.com>> 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:* af@afmug.com >> *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 >> <j...@spitwspots.com> 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.com <http://www.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','ch...@wbmfg.com');> 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','af@afmug.com'); >>> *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','af@afmug.com'); >>> *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. 37^th Street • Phoenix • AZ 85040* >>> >>> *602-426-0542 <tel:602-426-0542>* >>> >>> *r...@triadwireless.net* >>> >>> *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* >>> >>> >> >
