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Hammerpact


Jronman

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Just re read your question, probably not because they would defeat the purpose, hammer acts as a chipping function for vertical blows where the impacts Engages at a point or torque when the motor requires the anvil to "hammer" in a circular energy


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59 minutes ago, JimboS1ice said:

Already have 1, makita makes it you can switch between impact hammer and rotary, reviews are so so


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Yeah Makita's has both functions but isn't it either impact mode or hammer mode. No option for both modes to be selected at same time.

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I actually ran this idea past DeWalt about 5 years ago. The thought being to time each hammer impact ever so slightly after the rotary impacts. Where hopefully this would avoid cam out when driving fasteners(force the bit into the screw on rotary impacts). Sent drawings, graphs, etc...never went anywhere though.

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1 hour ago, Jronman said:

@tpamatmat So you could have a concrete screw that wouldn't need to be predrilled? Drills with the blows and drives with the impacts. 

No, my thought was more for general purpose fastening especially in hard wood where the screw bit tends to cam out of the screw head(especially Philip's head screws). My idea was that a properly timed downward strike with the rotational impact would avoid this, but I have countless bad ideas that have gone nowhere:)

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2 hours ago, tpamatmat said:

No, my thought was more for general purpose fastening especially in hard wood where the screw bit tends to cam out of the screw head(especially Philip's head screws). My idea was that a properly timed downward strike with the rotational impact would avoid this, but I have countless bad ideas that have gone nowhere:)

Cordless impacts actually have a hammering effect due to their hammer and anvil design. This actually makes cam out worse especially with Phillips.

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I don't know why they still make construction screws with philips head screws. A while back I bought a bunch of Grip Rite construction screws at HD that were torx. I loved them as I never had the issue of the bit spinning out like with phillips. All of our screws at work are phillips, this is one thing I wish the industry would change and phillips screws would go away.

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3 hours ago, JimboS1ice said:

You couldn't use a philips with all the energy transferred to the head, torx or Robertson, also for hardword you'd risk splitting not pre drilling,
@jronman do they make a "self tapping" concrete screw?


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That's what i was wondering about @tpamatmat's idea if the screw could drill the hole.

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54 minutes ago, SetBuilder said:

I don't know why they still make construction screws with philips head screws. A while back I bought a bunch of Grip Rite construction screws at HD that were torx. I loved them as I never had the issue of the bit spinning out like with phillips. All of our screws at work are phillips, this is one thing I wish the industry would change and phillips screws would go away.

The worst screws to use are the #1 Phillips. They strip extremely easy.

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4 hours ago, JimboS1ice said:

do they make a "self tapping" concrete screw?
 

 

Yes they do. I have used something called Raptr screw that screws in brick and concrete without pre-drilling.

 

I dont know how they compare to the TapCons I normally use but both seem to work with no issues.

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46 minutes ago, JimboS1ice said:


Those should be used where you don't want things over driven and over torqued


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I was talking more about screws used for hinges. I thought they were #1 phillips. I cant remember. I used a #8 self centering drill bit to pre-drill the holes.

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