I finally ordered a pair of those shorts and gave them a try. My hammer drill worked about the same, but I was able to finish the job in a fraction of the time because my neighbors kept stopping by and offering to help. Nice guys!
A rotary hammer is basically a small jack hammer combined with a drill. The hammering is completely independent from the rotation, and it is quite powerful. A hammer drill is a drill with cams around the chuck to make it bounce and "hammer" the surface you are drilling when it rotates. The impacts are much less energetic than those from a rotary hammer.
For future reference to everyone on what the difference is. Impact drilling does not cut material as regular drilling does, all the front end of an impact drill does is bash into the material to dislodge a piece which then gets cleared out by the spiral. So the absolutely primary part of this process is impact force. Which is where a mere drill has problems as they only put a small toothed disk in there that generates small vibrations, where as the rotary drill has a huge chunk of metal getting smashed along the shaft. The drill might do something with soft/small particle masonry, but the moment you reach a harder piece it hasn't got the impact force to hammer out material.
2 different tools for 2 different purposes. If you want a 1/2 chuck with hammer capabilities but are not drilling through rock often a hammer drill is the way to go. If all you are doing is drilling rock then a rotary is what you want.
This video was simple, yet very useful. I'm doing some training for work, and I'm reading up on different hammer drills and rotary hammers. Seeing you use the two tools gave me a lot of insight, and will be able to help customers more now that I've seen a demonstration. Thanks a lot.
Found this video while looking for a hammer drill. Finished the video, and ordered a Rotary Hammer Drill instead 😄I didn't even know this tool existed until about 5 minutes ago. Thanks mate! saved me buying the wrong thing.
Hammer drill: A drill that has a small impact mechanism. Useful for drilling small holes in brick, cinder block and other softer materials. Rotary hammer: A demolition hammer with a rotating bit. Useful for drilling up to 2 inch holes in hard materials including concrete, granite e.t.c.
I desperately was trying to drill a 3" hole in a concrete wall with a Bosch hammer drill until I gave up and went to buy a basic Lidl rotary hammer. Best décision ever.
I was looking to buy a hammer drill but I am now convinced that a rotary hammer would be a better choice for me. Your demonstration made this very clear. Thank you!
Very very very useful video. I wish more content uploaders had more respect for their audience as you clearly do. No self-indulgent waffling. Just useful information. Thank you very much.
Hammer Drill : light weight, compact, easy to transport to different jobs and use around the job site. Versatile - can be used for small - medium size holes (can bore large holes if you progress from smaller to medium to larger) through many different material surfaces with minimal risk to damage of home or property. Sds rotary drill : heavy, more durable, more powerful and robust - specializes in masonry/concrete drilling, good for boring large holes, over and over again. Usually used in construction work/heavy duty drilling where you need to drill multiple holes. Not versatile as far as doing more delicate or intricate, smaller holes on more fragile material.
@bahathir Thanks much for your video response. My one regret regarding my video is that I was unable to hit the aggregate that plagued me while working on the actual basement walls. When I DID hit a piece of granite river rock in the foundation wall my progress was often literally stopped until I hammered and punched it with a long slender cold chisel. My video makes the two devices look nearly equal, when in reality the hammer drill is a door stop unless drilling cinder block. Excellent demo!
I would emphasize how clean the holes are. It makes a big difference in how secure the anchors are. Also SDS drills are available in much longer lengths which can be a big help for your back when drilling the floor.
I once tried drilling a one inch hole in a dense concrete slab with my Dewalt hammer drill, and it took me over an hour if I recall. It took me forever to get about 1-2" deep. I finally gave up and went down to a 3/8" bit and FINALLY got through, and going back to the 1" bit took me another good while (seems like a bad idea, because doing that would eliminate the pointed tip of the bit from having it's penetrating action). I can't believe the drill didn't catch on fire before I was done (I quit about every 30-60 seconds to try to let it cool off, which made the job take much longer). It still works, but I use it for smaller jobs. And yeah - that one inch bit was PURPLE when I was done. Wish I had seen t his video before I bought that hammer drill... Live and learn.
I was asking myself the same question and researching online came across your comparison. Thank you for adding to the collective knowledge of the internet. Extremely eye opening, seeing the difference.
Rotary hammers like magic, when I got mine I tried the 25mm bit in concrete and it it just fell through it, I had to drill a few more holes to make sure it wasn't a bad bit of concrete but nope it is fearless with concrete also it will go through reo bar just have to take it easy so it doesn't deflect but it still chews through anyway. We tried drilling hundreds of holes through the edge of some concrete to fit reo bar for a joint with a makita hammer drill and after 2 holes decided
Same experience. I bought a large corded Ryobi hammer drill and it sucked. Borrowed my electrician friends compact cordless rotary hammer and it drilled holes in concrete all day. The other couldn't do one
Nice video, I've used both of these tools and for drilling concrete, the "more hammer....less drilling" is the only way to go. As a millwright....there were days I installed 2-3 THOUsand concrete anchors...big warehouses with many Pallet Racks...Here in Calif...all Pallet racks must be anchored for seismic requirements...(earthquakes)....the high-speed 'drills' are also good at melting the silver solder and losing the tungsten-carbide tips....
You were probably working a 10 hour day. A bolt installed every 12 seconds is still smoking, no wonder you were melting bits. Did you switch drills off or just run em till they smoked?
@@windymeadowsoxteam7783 OK, I guess I should have checked my reply better....a hundred to 200 a day. one to two boxes of 100 anchors...3/8" and I drilled them to maybe 2-2 1/2". Big BOSCH SDS roto-hammer.
That's the same experience i had, the only probably with rotatory drills is that they do not give a clean hole, in other words, if you want to drill a hole all the way trough it will come out with a chunk of concrete...
Exactly what I needed to know--I'm going out first thing in the morning to add to my tools. The hammer drill took WAY TOO long to drill through some concrete tonight.
Great comparison! I bought a Hitachi SDS 8 years ago as a treat to myself, and it's still going strong (metal gearbox, not the cheapo one). Over the years I have lent it to various friends and family, and every single one of them ends up buying their own SDS shortly after. I honestly can't understand why there are still regular hammer drills available.
Great informative video. I need to drill some holes in concrete so I can secure a post to an existing slab of 6" thick concrete. Very helpful, good video quality and narration
I finally calmed down after reading some "Larry Bird shorts" comments and the youtuber responding with saying his wife said he should be embarrassed for uploading this video. Some funny stuff and humor the up loader has.... With that aside, thank you very much for the comparison between the 2 types of concrete hole makers. I believe the rotary hammer is the way to go for my intended applications. Even in 2019, "vs" videos barely came out about 1 year ago. Thanks a bundle, sir.
we had a company out installing a new heat and air unit, a few weeks later I couldn't find my Hilti. Couldn't say for sure that my drill left with them. I miss my old Hilti, it gets the job done. 😂
4:39... When you play off the wrist twister as if it didn't hurt at all to keep a manly reputation amongs other old school short short wearing craftsmen.
Wow that just settled my decision. I was looking at CPO Outlet's Malwaukee Heavy Duty hammer drill vs the 7A Rotary hammer for a bit more and was wondering how they match up when drilling concrete. Thanks a billion for the video!!!
There is a big difference between 1/2" SDS masonry bits and 1/2"round shank masonry bits. There's a bigger difference between a rotary hammer that weighs and costs 3-4x as much as a 1/2" hammer drill. A hammer drill introduces some vibration, a rotary hammer applies spring loaded impacts. A 1/2 hammer drill is a drill that can handle occasionally drilling through masonry. A rotary hammer is the electrical replacement for a stra chisel and a hammer.
Thanks for the video, i have a big old makita hammer drill and i just opened up a case i had in the garage of an aeg roto hammer and didnt know the diff. They aeg makes the big makita look not soo big. These were all my grandpas tools as he was a general contractor and has since passed but going through the garage i find all sorts of tools. My makita is same size as your dewalt and the aeg is huge like your roto
Great video! I've spent many wasted hours with a hammer drill and concrete. Sprained my neck last time, too! Ordered a rotary hammer last night. Regular $1050 on clearance sale to $380. Cant wait to get it and save my back, neck, elbow, shoulder....
This is my second time coming to this video after a year, it was flawless last time with a hammer drill. This time I'm stuck with 3 holes against an aggregate using the same hammer drill and getting concerned with my hands getting tremors. Time to invest on a rotary hammer 💰
Good video. Nice info and demonstration. Not applicable though for the average homeowner looking to install a railing on their front porch or the weekend warrior. They simply can't justify spending $400 on a tool to drill 8 holes when they can go to Harbor Freight and buy a hammer drill for $40 that will do the job (in much more time give you). Yes the pros NEED these higher end tools for everyday heavy abuse and speed required for their application but if you're on a budget you can't always afford these workhorses. It also doesn't hurt to drop $100 on a good bit either.
Exactly, and you can drill the same hole using "regular hammer drill" just takes longer, for home use hammer drill (corded!) is BEST tool ever. You can work on wood/plastic/concrete/mix paint/cement etc. etc. etc. ONE drill regular person will ever need for most of the jobs.
Yeah, If you only use it once in your life. Once you get a tool that others need they will pay you to drill them or rent your tool from you. It's a big picture.
This video is a masterpiece 👏. Exactly the information that I was looking for. I am mounting a toilet and needed only to drill two holes in concrete. I have a hammer drill, but it will not drill the aggregate . I need the holses in a certain place to line up with holes in the toilet. . I previously rigged it because my hammer drill sucks. My rig lasted twenty years, but it is leaking now. I know I can drill my holes with a rotary hammer drill. Thanks for making this video. No one else has shared this information. Great job 👏
Excellent video. Bought a Craftsman 1/2 in. corded drill/hammer drill thinking that I could drill into my basement and garage concrete walls. Exactly as you showed, once into aggregate, it's not going anywhere! Going to get an SDS hammer drill.
Great video comparison! Im in the middle of drilling with my Bosch hammer drill into some concrete wall to put up some shelves and have spent over 2 hours for 6 holes!! and to make it worse 3 of the holes are oversize and the bolt anchors struggles to do up tight... I need a Rotary Hammer Drill!!
Has anyone else noticed the the rotary hammer is 3 times the size of the hammer drill? Sheer physics would indicate that it would go through faster under its own weight with equal drill bits, pushing or not.
Put this in slow motion and watch the chuck on the yellow drill first it's going in reverse as it struggles to drill, no wonder the other drill went through like butter as it was going the proper direction
In my experience hammer drills excel in drilling cinder block and brick. Whereas a rotary will either crack cinder blocks or explode a brick in half. Just got to have the right tool for the job.
Hammer drills are good for smaller holes like for tap cons etc. If you are drilling holes larger than 1/2" or deep holes a rotary hammer is the way to go. The average homeowner should probably just stick with a hammer drill. I've drilled tens of thousands of holes with each.
Nope, buying a rotary hammer drill was the best investment I have ever made. My home was built out of concrete. There wasn't a single drywall. My hammer drill could not go drill through the walls without me exerting over 50kg of pressure.
That's why this guy isnt showing a realistic demonstration, by using an over sized bit. I've framed my entire basement treated boards to the concrete, with my Dewalt corded 10 amp hammer drill for my tap-cons and it went through the wood and concrete in 20 seconds each time like butter. This is a biased guy here. Look at the size of the damn bit. That's what makes this a shitty comparison. I think your next comparison should be between a boat and a truck, bc both are used for transportation but by different means. Same thing.
You were right to get a rotary hammer seeing as hammer drills arn't designed to drill into concrete. Hammer drills are designed for brick and various other things, just not concrete. It's hard to beat Milwaukee corded tools but Bosch is top dawg when it comes to hammers imo.
This helped me to figure out whether my ne hammer drill is defective or not.. I’ve previously used rotary drills and recently I brought a hammer drill. The sound of it when drilling concrete is awful.. not a nice hammering sound like in rotary drill. Turns out it’s the normal sound of a hammer drill.😑
can vouch for this. had to put in some base boards around some cinder block walls. got one of those type of drills...and well yeah a rotary happer for cinder wall with 1/2" plaster is like going to a gun fight with an 80mm artillery cannon. but man it was a pleasure to use.
Good Day! I hope you're enjoying a pleasant one. At about 1:20 where you advise about letting the machine have a good bounce. I used to restore vintage power tools, going back to the early 1900's, and some came with original instructions. More than once the Ol' Timey Instruction authors, while writing about how much pressure to use with the machine in question, power drills, saws, and such, advised to use just the right amount of pressure to let the tool do the work, and also warned not to "Crowd" the tool. I feel pretty certain you didn't pay a pile of money for your power tool so you can get a stiff muscle somewhere while trying to Force (Crowd) the machine, and not allow it to do the work for you. This video is my first introduction regarding the usefulness of the Rotary Hammer. I like it, and believe it to be an Excellent demonstration. Thank You for taking the time to create and post it. Enjoy! ~ john b.
I guess 1 more comment on this subject. I own a Hilti roto-hammer the lightest 1 they ever made, a larger harbor freight roto-hammer, a bit larger 1 from harbor freight, dewalt hammer drill (1/2"), and finally a 35 lb demo hammer identical to harbor freight's, but with no labels. I can attest that all theswe tools have a legitimate ppurpose and that each one performs its purpose better that all the others. I use the small hilti when I need small holes drilled in concrete or stone, the hammer drill when I want a clean exit like in ceramic tile, the 2 harbor freight roto-hammers for larger holes in concrete and the demo hammer to knock apart concrete pads, remove large stones or as right now diging post holes in extremely rocky soil. The tool should be fitted to the job you will probably get a great deal of satisfaction from the results
That's a fair accusation. The hammerdrill is a DeWalt DWD520, with a 10A motor. The rotary hammer is a Milwaukee "Thunderbolt", and it's old enough that it comes in a metal case with no specs, nothing specified on the tool itself, and nothing that I can find on the Web. I would expect that the Thunderbolt draws more current if for no other reason than than the cord is heavier, but at the same time it's still only a 15A plug. Rotary hammers do take over at the heavier end of the workloads.
The BPM is fixed on the rotary hammer drill, while the BPM and RPM is variable on the hammer drill. When using the hammer drill at the best setting in the trigger you can accomplish a lot, for the price. For the average person, when you correctly set the RPM, the hammer drill will be just fine.
One rotates while hammering (rotary hammer), and the other hammers while drilling (hammerdrill). In other words: One turns while pounding (rotary hammer), and the other pounds while turning (hammerdrill). It's worth noting that you can turn off the "turning" part of a rotary hammer, and it becomes exactly a jackhammer and nothing more (though not perhaps the biggest jackhammer). It would still go into the concrete, but the "hole" would be useless for hardware - it would not look "drilled".
the biggest difference in both is that Hammer drill uses standard chuck and rotary hammer uses SDS chuck and bits, SDS lets the bit itself move back and forth within the head. Hammer drill moves with the whole head back and fort but only few mm but the bit and chuck are solid like one piece
its fuuny many of the comments are about the guy outfit, i didnt even notice his outfit , but back to the video, is the dewalt the 12amp one also either way, one is around 100$ and the other is like 300$ +
Hammer Drill : light weight, compact, easy to transport to different jobs and use around the job site. Versatile - can be used for small - medium size holes (can bore large holes if you progress from smaller to medium to larger) through many different material surfaces with minimal risk to damage of home or property. Sds rotary drill : heavy, more durable, more powerful and robust - specializes in masonry/concrete drilling, good for boring large holes, over and over again. Usually used in construction work/heavy duty drilling where you need to drill multiple holes. Not versatile as far as doing more delicate or intricate, smaller holes on more fragile material.
The general name for the category is hammer drill. An ordinary (cheap) hammer drill has a clutch for the hammering action. A special (expensive) hammer drill known as a rotary hammer has a piston mechanism. It delivers a significantly harder pounding action. You can really feel it, the piston packs a helluva punch. Read the wikipedia article on Hammer drill.
