I see most brands make two types of SDS drill, but why? what's the difference between a hammer drill and a rotary hammer? what's the difference between these two types, is it just the power? does the first one do the same thing as the second?
>>2969818The one on the left is obviously smaller and probably hits with less joules of impact energy. Also looks to only have hammer drill and drill modes. One on the right is obviously bigger, probably impacts with much higher joules of impact energy, has drill only mode, hammer drill mode, and hammer only mode, and probably takes the larger shank sds bits than the one on the left.
>>2969819So in conclusion the right one will more than likely stomp the shi t out of the left one when doing heavy concrete drilling.
>>2969818The mechanism in them defines the primary functionThis video explains it perfectly.https://www.youtube.com/watch?v=dPYVDz5SSlwLeft drills good but hammers poorly. (hammer Drill)Right hammers but drills poorly. (rotary Hammer)
>>2969819what about these two?many of the left variety seem to have 3 functions as well as the right; hammer only, drill only and hammer drill. will it just be weaker? or is the mechanism fundamentally different and going to give different results?
When to Choose a Hammer DrillSmall Projects: Ideal for drilling holes smaller than 1/2 inch for anchors or screws.Versatility: Most hammer drills have a "drill-only" mode, allowing them to function as a regular drill for wood or metal.Occasional Use: Best for homeowners and DIYers who only occasionally encounter masonry.Budget: Generally more affordable, ranging from $50–$300. When to Choose a Rotary HammerLarge Holes: Essential for drilling holes 1/2 inch to 1 inch or larger in solid concrete.Demolition: Most feature a "hammer-only" mode for chiseling tasks like removing tile or breaking small concrete slabs.Efficiency: It does most of the work; you don't need to push hard. A rotary hammer can drill through concrete up to 5x faster than a hammer drill.Professional/Heavy Duty: Necessary for construction professionals or large projects like setting foundation bolts.
>>2969822>>2969824so what i want is on the right. noice, thankyou anons.have a photo of some cool industrial stuff in gratitude.
>>2969818Right = weight moved closer to chuck = nicer for drilling/hammering downward, usually more power, but less nice for walls because you need to be physically closer to the drill and the debris when going horizontalLeft one does not have hammer only mode which is essential for removing tiles and demolition, but is a lot easier to align and keep straight when drilling deep holes horizontally.
>>2969818question: is this a rotary hammer?https://www.screwfix.com/p/skil-rh1u1770ga-3-1kg-electric-sds-plus-rotary-hammer-drill-220-240v/233kg#product_additional_details_containerbut it is just in the form of a hammer drill?
>>2969843im not quite sure what youre asking. thats a rotary hammer. you can use it to hammer or hammer drill. same stuff as the rotary hammers in OP.
>>2969847nah it;s just that is looks like a normal electric drill, rotary hammers usually being in this form factorhttps://www.screwfix.com/p/skil-rh1u1781gb-5-3kg-electric-sds-plus-rotary-hammer-drill-220-240v/755kg#product_additional_details_container
>>2969818I have a corded bosch one like the one on the left and a cordless metabo hpt one like the one on the right. The right version is more compact and easier to keep in my tool box and drilling when you have less space. Otherwise i have no idea of the differences.
>>2969818Hammer drills are more suited to drilling. They're lighter and easier to handle, and usually spin faster. The hammer function is really only there for some added versatility when you need it. Key operand word being "need". Rotary hammers are just straight-up better for anything you'd be using the hammer drill function for. And, unlike a lot of tools where the "pro" version is noticeably-but-not-amazingly-better, it's not just a little bit better. Even a light-duty rotary hammer will put a hole through concrete or stone roughly an order of magnitude faster than a good hammer drill, unless you're going through something very soft or easily broken up (like brick or cinder block).
>>2969818left: 2,6 joule hammering powerright: 2,1 joule hammering powersize and price isnt all, i got the left and it does my jobs with some to spare. for drain pipe i have used it up to 35mm in thick concrete, takes a battery but its more powerull than your dads old 220v. for car repairs it eats through spot welds like they wherent there. right might have dust retrieval or something i couldnt find thoose specs easily.
>>2969824>The mechanism in them defines the primary function>This video explains it perfectly.Both the drills OP pictured are Rotary Hammers. This is not a question of a Hammer Drill, using a serrated gear to drive the chuck back and forth vs an actual Rotary Hammer, potentially using an electro pneumatic mechanism. As far as the two drills go, both if I’m not mistaken are actual rotary hammers with an actual rotary hammer mechanism. Some rotary hammers use an inline design, like the Bosch Bulldog drills, and some use an angled (90 degree, although not actually 90 degrees, mechanism), like the design that Hilti became famous for. Whether there is actually an advantage to either design other than preferred ergonomics, I am unsure. Most major rotary hammer manufacturers use the inline mechanism for smaller less expensive rotary hammers, then switch to the design where the motor is at an angle to the drill arbor once you get to rotary hammers meant for larger work, maybe from 5/8” up to 1-1/2” inch solid core drilling, then the manufacturers switch back to a linear design once you get to hand held demolition drilling and breaking sizes. I’ve always presumed the reason for the different designs once patents ran out was ergonomics and overall length, with the angled motor design allowing a few inches to be eliminated from the length for larger drilling that might have to be done in confined spaces. Once the drill gets too large though, their is likely no point to using a rotary hammer though, so the angle design for a hammering mechanism gets ditched.
I got an impact drill because my other one was so shitty. But at the same time i mostly use it to drill 3d prints so its kind of overkill.
>>2969824If the right one drills poorly, why yhe fuck does it come with quick switch? Whats the point in attatching a normal drill chuck to it then?
>>2972002Well it drills , just not as good.Its a multi function, people want that.top rpm is lower and the gearbox is single speed(albeit adjustable),torque is lower(i believe).Some materials for drilling want fast speeds and high pressure, things rotary hammer cant provide.But it can do hammering.Rotary hammer does wonders in drilling concrete because it hammers but is only ok in other materials.>>2971979Perhaps true as far as i can tell from the parts diagrams for these two machines.They both hammer just in a different form factor and the mechanism is for hammering in both despite the different design.one is lighter duty tho. But that doesn't change the fact that the video in itself is correct.The differences usually are in the mechanism and the primary use for it.
>>2969818>hammer drill and a rotary hammerhammer drills are ancient, outdated technology and frankly nobody should be producing or buying them.They do thousands of hits a minute, but the hit energy is so tiny it barely does anything in hard materials.Hammer drills hammer slowly, a few hundred times a minute, but with significant energy to actually hammer through hard rock and concrete.Never ever buy a hammer drill, they make a lot of noise and fail on hard material. Always buy a rotary hammer. You can get them for the same prices these days, no reason to buy the wrong tool for the job.>>2969824If you want dual use, i.e. high RPM drilling in wood and metals, there are combo hammers with switchable chucks and high rpm gear modes as well.>>2969825These are both rotary hammers. Reputable brands give you impact energy per hit in Joules or similar. The left variant is meant to also be used one-handed on a ladder or something, and they top out at around 3.5 Joules for the strongest ones, which is still ~32mm holes in concrete.They will struggle if you want to demolish walls or remove a lot of tile real fast, the right one will do that much quicker.>>2969826>When to Choose a Hammer DrillNever. Fuck off. What does project size have to do with anything? If your project is 1 hole in the wall for 1 painting and your wall is concrete, you are fucked with your rinky hammer drill. You need a rotary for that.
>>2973611hammer drill can make small holes in concrete just fine
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