Lotte, M., and Keller, M., (1949) La scie circulaire. Serv. Centr. d’Essais des Bois et Lab. d’Essais de L’Institut Nat. du Bois. Broch. Tech. No. 8, Paris.

Skoglund, C., (1949) Temperaturmätnigar pa sagklingor. Föreningen Svenska Sagverksmän, Sjunde Årsmotet, Stockholm, pp. 50–54.

Pahlitzsch, G., and Jostmeier, H., (1964 a) Beobachtungen über das Abstumpfungsverhalten beim Fräsen von Spanplatten. Holz als Roh- und Werkstoff 22: 139–146.

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If you are using even a decent masonry bit in a hammer drill and they wont go into the concrete then you must be hitting a piece of rebar or similar item embedded in the concrete. If that is the case, masonry bits will not cut through a piece of metal. Try another hole in a different location. With a hammer drill you only have to use a medium pressure on the drill to get penetration. Let the hammer drill do a lot of the work.

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Hetzel, F., (1928) Über die Bearbeitbarkeit von Spanholzplatten und Sperrholzplatten (Bohren und Stanzen). Diss., Tech. Hochschule Dresden.

Pahlitzsch, G., and Dziobek, K., (1961 b) Beitrag zur Bestimmung der Oberflächengüte spanend bearbeiteter Hölzer — Erste Mitteilung. Holz als Roh- und Werkstoff 19: 403–417.

Machining is a manufacturing process where a desired shape or part is created using the controlled removal of material, most often metal, from a larger ...

Pahlitzsch, G., and Mehrdorf, F., (1962 a) Herstellen von Schneidspänen mit Flachscheiben-Spanern. Erste Mitteilung. Einfluß von Spannungsdicke und Holzfeuchtigkeit auf die Erzeugung von Holzspänen. Holz als Roh- und Werkstoff 20: 314–322.

If you conclude you need heavier duty, the cheapest option for the power level is a decent corded SDS hammer drill, and if you want battery powered it costs more to get a kit set up, and drills have different purposes based on size, so be sure to get one that's up to the duty you need. The new generation of brushless 18V power tools compare nicely with similar size corded tools, and the higher voltage/larger versions are even better. If you want to chip large jobs or break up slabs, you end up switching back to corded.

Brüne, H. B., (1930) Untersuchungen über den Einfluß der Faserrichtung auf die zur Holzbearbeitung erforderliche Zerspanungsarbeit. Diss., Tech. Hochschule Dresden.

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Pahlitzsch, G., (1966) Internationaler Stand der Forschung auf dem Gebiet des Hobeins und Fräsens von Holz und Holzwerkstoffen. Holz als Roh- und Werkstoff, 24: 579–593.

Kivimaa, E., (1948) Koivuu taivutuksesta (On the bending of birch). Valtion teknillinen tutkimuslaitos No. 54, Helsinki.

Schimming, H., (1952/53) Untersuchungen zum Problem der Kreissägeblätter für Holzbearbeitung unter besonderer Berücksichtigung von Hobelsägeblättern. Wiss. Z. Tech. Hochschule Dresden 2 (1): 65–88.

You can clear dust from deep holes with a turkey baster attached to a drinking straw, or a bulb with a tube attached if you need the permanent version. You can blow the dust out from the back of the hole periodically or before applying epoxy/adhesive.

Saito, J., Edamatsu, K., and Ohira, J., (1956) The effect of tooth bite on the cutting forces in ripsawing. J. Japan Wood Res. Soc. 2: 65–68.

Sugihara, H., and Sumiya, K., (1955) Theoretical study on temperature distribution of a circular sawblade. Wood Res. Bull. No. 15 of the Kyoto University, Kyoto, Japan, pp. 60–74.

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So usually it's best to use a good drill and a good bit, the right amount of pressure, periodic dust removal and bit rotation or cooling when necessary, be aware of what you're drilling into, and change to a regular kit(drill, cutting oil, HSS bits) if you hit metal your drill isn't suitable to drill through.

Pahlitzsch, G., (1951) Spangebendes Formen, in „Hütte“, Taschenbuch für Betriebsingenieure (Betriebshütte) 4th ed., Part 1, Verlag Wilhelm Ernst u. Sohn, Berlin, p. 393.

Schwacha, B. G., (1961) Liquid cutting of hard materials. U.S Pat. No. 2, 985.050. Issued May 23, 1961. Assigned to North American Aviation, Inc.

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Azzola, F. K., (1954) Beziehungen zwischen Zahnform, Vorschubgeschwindigkeit und spezifischer Zerspanungsarbeit beim Kreissägenlängsschnitt. Holz-Zentr. 80 (108): 1266.

Juštšuk, G., (1951) Avfallmänder inom sågverksindustrien. Svenska Träforskningsinstitutet, Trätekniska avdelningen. Medd. 20 B, Stockholm.

Saito, J., Edamatsu, K., and Ohira, J., (1957) Holzzerspanungsforschung mit mechanischen Sägezähnen. Govt. For. Exper. Stat. Bull. (97): 33–60.

I also assume you've already evaluated what you're trying to drill through, and considered moving the hole rather than difficult drilling. Also think about what you're drilling into in terms of structural metal, sleeves/piping/conduit. If you're hitting metal in a commercial building it could be quite a variety of things. At home, a little forethought should prevent you from drilling into something you shouldn't.

The hotter it gets(continuous drilling without coolant, particularly drilling into/through metals), the more rapidly it will wear. The bit heats up due to impact and tip friction, and side friction against the sides of the hole(frequently clear dust for deep holes and drill as straight as possible). When you drill into or through metals in slab this way, you create a ton of additional heat by repeatedly deforming the metal. Most metals are tough instead of hard, so drilling through them with an ordinary carbide bit is also time consuming as you are basically repeatedly deforming the surface of the metal until it flakes into a powder and finally gets drawn out of the hole.

Pahlitzsch, G., and Dziobek, K., (1961 a) Über das Wesen der Abstumpfung von Schleifbändern beim Bandschleifen von Holz. Holz als Roh- und Werkstoff 19: 136–149.

Martellotti, M. E., (1941, 1945) An analysis of the milling process. Trans. of ASME 63: 677–700; also: Part II, Down Milling Trans. of ASME 67: 233–251.

McMillin, C. W., and Lubkin, J. L., (1959) Circular sawing experiments on a radial arm saw. For. Prod. J. 9 (10): 361–367.

Kollmann, F.F.P. (1968). Wood Machining. In: Principles of Wood Science and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-87928-9_9

Bakiev, R., (1959) Some aspects of the vibration cutting of wood (in Russian) Izv. Vys. Ucheb. Zaved. Lesn. J. 2 (2): 144–149.

Osenberg, W., (1926) Untersuchungen über den Zerspanungsvorgang mittels Holzbohrern beeinflussenden Faktoren. Diss., Tech. Hochschule Dresden.

Englesson, T., Hvamb, G., and Thunell, B., (1954) Noen resultater fra undersøkelser over saging med og mot fibrene. Norsk Treteknisk Institutt, Rep. No. 7, Oslo.

Thunell, B., (1950) Neuere Ergebnisse der holztechnologischen Forschung in Schweden. „Holztagung 1949“, Schriftenreihe der Österr. Ges. f. Holzforschung 2: 8.

McKenzie, W. M. and Franz, N. C., (1964) Basic aspects of inclined or oblique wood cutting. For. Prod. J. 14 (12): 555–566.

So check what's at the back of your hole, and if it's rebar, consider sacrificing a few ordinary drill bits to get through the metal (they'll get dulled up where they contact rock and when they punch through, but they're much faster to get the bulk of the metal out of your way, although still quite time consuming. If you're actually drilling concrete, consider getting or renting an actual hammer drill and getting a high quality bit with an X style tip like this:

This is a carbide tipped masonry drill bit. It has a shaft and flutes of softer, tougher, less brittle alloy, and the small piece or pieces of metal welded into the tip are blocks of carbide. The carbide is extremely hard, and because it is supported by something extremely tough, it can hit other hard things hard enough to break them without shattering itself. For this tool, there is often a very perceptible difference between high performance product and lesser versions, so if you bought the wrong cheap brand, you could end up with very short bit life on merit of lesser alloys or design quality. Usually when an HD bit dies it's from overheating the tip though. I've used a few 12" long 1/4" bits until the flutes were worn off without breaking them.

Pahlitzsch, G., and Mehrdorf, F., (1962 b) Herstellen von Schneidspänen mit Flachscheiben-Spanern. Zweite Mitteilung. Einfluß von Schnittgeschwindigkeit, Spanwinkel und Schnittflächenwinkel. Holz als Roh- und Werkstoff 20: 408–418.

Kaiukova, M. V., and Konjukhov, D. N., (1934, 1935) Research on circular saws and the cutting process when they are used (in Russian). Lesnaja Prom. (11): 36–55; 1935 (1): 29–39.

Bershadskij, A. L., (1953) Complex solution of problems in high-speed sawing (in Russian). Lesnaja Promyshlenost (Timber Industry) No. 5, 26–29 and No. 6, 22–25.

... Tool, Contour Gauge Profile Tool with Lock, Measuring Tools Shape Duplicator Woodworking Tools.

Pahlitzsch, G., and Dziobek, K., (1959) Untersuchungen an einer horizontalen Blockbandsäge. Holz als Roh- und Werkstoff 17: 364–376.

Barz, E., (1953) Schwingungs- und Arbeitsverhalten von Kreissägeblättern für Holz. Forschungsberichte des Wirtschafts- und Verkehrsministeriums Nordrhein-Westfalen, No. 61, Westdeutscher Verlag, Köln und Opladen.

Prodehl, A., (1921) Untersuchungen über das Biegen gedämpfter Rotbuche. Diss. Tech. Hochschule Dresden. Comp.: Z. VDI 75: 1217.

Biermann, O., (1942) Betriebserfahrungen mit dem Vollgatter und ihre Auswertung. Holz als Roh- und Werkstoff, Vol. 5: 390–397.

Also an honorable mention to drill, rotary tool or die grinder with carbide spade bits, diamond bits, and/or diamond or carbide hole saws if you need really clean holes.

Pahlitzsch, G., and Jostmeier, H., (1965) Beobachtungen über das Abstumpfungsverhalten beim Fräsen von Schichtstoff-Verbundplatten. Holz als Roh- und Werkstoff 23: 121–125.

Skoglund, C., (1950) Spänningar och svängningar i roterande sägklingor. Svenska Träforskningsinstitutet, Trätekniska avd., Medd. 12 B, Stockholm.

Kivimaa, E., (1950) The cutting force in woodworking. Publ. No. 18, The State Inst. for Techn. Research, Helsinki, Finland.

Meyer, M., (1926) Untersuchungen über die den Zerspanungsvorgang mittels Holzkreissägen beeinflussenden Faktoren. Ausgewählte Arbeiten des Lehrstuhls für Betriebswissenschaften in Dresden 3: 90, Berlin.

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Also bear in mind how the hammer drill works. It delivers single rapid hits in succession. It has an advantage if it has a little bit of room to accelerate and decelerate the hammer and the bit, so if you're finding your hole is going in slow, be sure not to put too much pressure on the tool. You can listen and feel for changes and it's not too hard to tell(especially with larger bits and drills) when there is too much pressure on the bit or hammer and it starts to vibrate rather than strike. Combination drills with hammer function operate more or less by vibrating because of how the function has to be added in to an ordinary drill assembly, and they also spin more than is necessary, so be aware of how the tip is heating up if you pop it to high and start leaning in while you drill actual concrete instead of cinder block. At least one of my cordless hammer drills has a shock built in to the handle and includes in the instructions that if you are pressing hard enough to fully compress the shock, you're pushing too hard.

Grube, A., and Alekseev, A. V. (1961) Specific cutting work in planing and moulding of chipboards (in Russian). Derev. prom. 10 (2): 7–8.

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Pahlitzsch, G., and Dziobek, K., (1962) Beitrag zur Bestimmung der Oberflächengüte spanend bearbeiteter Hölzer — Zweite Mitteilung. Holz als Roh- und Werkstoff 20: 125–137.

Yugov, V. G., and Osipov, A. J. (1960) The use of high-speed water jets in wood cutting and processing (in Russian). The transactions of the Central Scientific Research Institute of Mechanization and Energy Requirements of the Forest Industries of USSR 15 (6).

Pahlitzsch, G., and Jostmeier, H., (1964 b) Weitere Beobachtungen über das Abstumpfverhalten und den Einfluß der Schnittgeschwindigkeit beim Fräsen von Spanplatten. Holz als Roh- und Werkstoff 22: 424–429.

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Büttner, R., (1930) Untersuchungen über den Holzzerspanungsvorgang mittels zwangläufigen Vorschubs unter besonderer Berücksichtigung der Schneidhaltigkeit der Holzbohrer. Diss., Tech. Hochschule Dresden.

Köberle, J., (1935) Richtlinien für die Wahl wirtschaftlicher Tourenzahlen an Kehl- und Fräsmaschinen. Tech. Rdsch. (Bern) 27, No. 44, 45, 47, 48.

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Teichgräber, R., (1953) Über die Spannungszustände bei der Verformung von Holz und die dadurch geänderten Holzeigenschaften. Diss., Univ. Hamburg.

Bethmann, H., (1940) Wesensart und kritische Beurteilung der Kurzprüfverfahren zur Bestimmung der Zerspanbarkeit von Werkstoffen. Diss., Tech. Hochschule München.

Be aware that rebar is made of a mix of scrap metal and can have a wide variety of hardnesses and toughnesses as a result. Somewhere out there is a piece of rebar made from recycled Swords of Ancient Kings, and if you find you have to drill through it, you may have to switch to high quality metal bits, or sometimes just chip out the bar, cut it where you need it cut, reinforce and re pour the concrete. Other high quality metals, like tools, bits, occasionally fall into pours as well. I don't think I've ever hit one, but rebar isn't the only metal you might hit.

Flemming, H., and Knospe, L., (1958) Der Einfluß der Schnittgeschwindigkeit auf die spezifische Arbeit bei der spangebenden Holzbearbeitung. Fertigungstechnik 8: 565–566.

Until about 50 years ago woodworking was more a handicraft than a scientifically established technology. Rising material and labor costs as well as new wood base materials, severe competition of other materials, and new wood machining processes have led to many studies of wood machining. Many goals have been sought: higher machining accuracy, kerf-loss reduction, increased safety, noise reduction, lower energy consumption, longer blade life. Nevertheless wood machining and especially wood sawing is still, and will remain, a rather conservative technique. Sawing is the most important and most frequent process in woodworking.

Koch, P., (1954) An analysis of the lumber planing process, Unpubl. Ph. D. thesis, Univ. of Washington; available on microfilm from the Univ. of Michigan.

Skoglund, C., and Hvamb, G., (1953) Tannvinklenes innvirkning på kraftforbruket ved saging med og mot fibrene. Reg. No. 4, Norsk Treteknisk Institutt, Oslo.

Thunell, B., (1951) Provsågning vid korsnäsverkan våren 1951. Svenska Träforskningsinstitutet, Träteknikska avdelningen, Medd. 21 B, Stockholm.

Endersby, H. J., (1953) The performance of circular plate ripsaws. Gt. Britain, Dep. Sci. Ind. Res., For. Prod. Res. Bull. No. 27, London. H. M. S. O.

Pahlitzsch, G., (1962) and Mehrdorf, F., (1963) Herstellen von Schneidspänen mit Flachscheiben-Spanern. Vierte Mitteilung. Spanen von Pappelholz im Vergleich zum Spanen von Kiefernholz. Holz als Roh- und Werkstoff 21: 144–149.

Saito, J., Edamatsu, K., and Ohira, J., (1955) The influence of tooth angle and set on ripsawing. J. Japan Wood Res. Soc. 1 (1): 42–45.

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Dower, E. J., and Oakey, W., (1957) Selection of carbide-tipped saw blades for optimum performance. Paper No. 57-WDI-9, ASME Wood Industries Conference, Winston-Salem.

You could be drilling slow because your tool is weak for the material, like a combination driver/drill/hammer drill. These kind of drills have normal chucks, and have the hammer drill function included as a secondary thought. A high end name brand drill of this sort can drill through low to medium strength concrete at a reasonable speed. If you only need one or two quarter inch holes, or if you're drilling into something like cinder block or brick rather than concrete, they're great because they use a large number of smaller hits compared to a dedicated hammer drill, which tends to blow out the core of the block less if you're not good at tailing off trigger when you're about to break through. I once made the mistake of using one (Milwaukee M18 at the time I believe) on high MPa concrete because I just needed one quarter inch hole for a plastic concrete insert. 20 minutes and 2 batteries later I had the 1" deep hole I needed. My smaller hammer drill(rotary only, good for small holes in close quarters) would have put that hole in in about 40 sec. without noticible battery depletion. My larger hammer drill slightly faster, but with shorter run time than the small one.

Barz, E., (1957) Fertigungsverfahren und Spannungsverlauf bei Kreissägeblättern für Holz. Forschungsberichte des Wirtschafts- und Verkehrsministeriums Nordrhein-Westfalen No. 360, Westdeutscher Verlag, Köln und Opladen.

The original method of drilling a hole with a hammer and chisel was to take a chisel, place it, strike it, rotate, strike, rotate, strike, rotate. This was improved by using a chisel with an X tip, to help prevent the hole from slotting and the tip binding as a result. Hammer drills work the same way. Strike, rotate, strike, rotate, and they use many individual hits and rotate fast with high torque, which allows for a chisel type tip not to be an issue with binding, but an X shaped tip will still help, especially if you run into materials of varying hardness or metals in slab(Sometimes you'll just hit a piece of gravel in the concrete that came from an incredibly hard source). Harder hits will cause a less precise hole, but allow drilling through much harder/tougher materials.

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Sugihara, H., (1953) Untersuchungen über das Bandsägen von Holz, 1. Bericht. Wirkungen der Vorschubkraft und der Zahnungsbreite. Wood Res. Bull. of the Wood Res. Inst. Kyoto 10: 1–16.

Pahlitzsch, G., and Dziobek, K., (1959) Untersuchungen über das Bandschleifen von Holz mit geradliniger Schnittbewegung. Holz als Roh- und Werkstoff 17: 121–134.

Koch, P., (1955, 1956) An analysis of the lumber planing process, Part I, For. Prod. J. Vol. 5, No. 4, 255–264; Part II, For. Prod. J. Vol. 6, No. 10, 393–402.

Schallbroch, H., and Doderer P. v., (1943) Zerspanbarkeitsuntersuchungen an geschichteten Kunstharzpreßstoffen. Berichte über betriebswissenschaftliche Arbeiten 15, Berlin.

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Laurent, A. St., (1965) Effect of induced lateral vibration of a saw tooth on the cutting of wood. For. Prod. J. 15: 113–116.

Smirnov, V., (1957) About the problem of the formation of a theory of vibration cutting of wood (in Russian). Nauch. Trudy Lvov. Lesotechn. Inst. 3: 88–92.

Lubkin, J. L., (1957) A Status Report on Research in the Circular Sawing of Wood, Vol. 1, Centr. Res. Lab., American Machine and Foundry, Greenwich, Conn.

Sugihara, H., (1956) Studies on the sawing with bandsaw blade, IV: Clearance angle and pitch. J. Japan Wood Res. Soc., 2 (1): 1–4.

I found the right bit for my job. I feel that the failures were due to bits made for brick and cinder blocks as oppossed to bits made for much harder concrete.

Weber, A., (1961) Messung der Schnittkräfte beim Fräsen von Holz mit Hilfe eines magnetostriktiven Meßverfahrens. Diss. Tech. Hochschule Stuttgart.

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Thunell, B., and Hiltscher, R., (1951) Die Beanspruchung von Gattersägeblättern im Betrieb. Holz als Roh- und Werkstoff 9: 232–242.