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Flat chisel bits for impact driver?

Rickkyyr8

Well-known member
Joined
Oct 31, 2021
Messages
163
Hey guys, have any of you came across a flat chisel bit for an impact driver or a hammer drill? Looking for something like that rotary hammer SDS plus bits but for one of the above items instead. I talked to my local Hilti dealer and he had never heard of one
 
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yatg

Well-known member
Joined
Aug 16, 2019
Messages
2,833
Location
Southern Oregon
Can you disable the spin on your driver or drill? If not, all you got is a flat tipped drill bit.
A rotary hammer lets you chose drill, impact, or both.
 
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Tools4Me

Well-known member
Joined
Jun 22, 2021
Messages
546
There definitely won't be one for a 1/4" hex style impact driver. For a chisel tip to work it has to have the impact hits push the chisel tip down into the work. Impact hits from a tool like an impact driver or an impact wrench hit rotationally instead. Great for loosening tight screws and bolts or driving in long wood lags, but useless for chiseling down into something.

When you say hammer drill, I'm assuming you are referring to the more homeowner type tool that has a standard 3 jaw drill chuck on it. One of those might work but it would have to have a setting where you can stop rotation of the bit while keeping the hammer function on. It has been a really long time since I used a drill chuck style hammer drill, but if I remember correctly they do direct their impact hits into the work (so they would work in that regard), but unless they have improved significantly in recent years the impact hits themselves are much weaker than what you would get from a true SDS style rotary hammer, so they won't work nearly as well. I consider drill chuck style hammer drills to be mainly for homeowners, so the tool they normally use for general purpose drilling can also be used to occasionally drill a couple small diameter holes to mount a towel rack to a tile wall, or drill a couple holes for lead anchors to run a short section of exposed electrical conduit along a concrete basement wall. That sort of thing. One does have to be careful with the terminology used related to all of this though, because there's a bit of overlap in terms of what companies or individuals call an impact drill, hammer drill, rotary hammer, rotary hammer drill, etc.
 
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