Impact drill explanation

[shed9]

Whilst doing my research on buying a new drill and impact combo I came across this video which gives a very detailed description of how it does its job.

The back end if the video is a bit superfluous but the cutaway and step by step description is a really good intro to impact for the layperson.

Thought it might be useful / interesting to some  [smile]

 

[TelcoRandy]

Good informative video. There's another one on youtube that shows the ratcheting action in super slow motion too...


You'd be surprised, most people don't know the difference between an impact and a hammer drill... Some lady at Home Depot a couple of years ago tried to tell me that they were the same thing but I just smiled and didn't bother correcting her.

 

[shed9]

That other one is very well done, hadn't seen that before.

I know what you mean about the big box stores not knowing what they are selling although to be fair I've shockingly even had similar situations in small specialist shops.

 

[elfick]

That's pretty cool... now I need a video explaining why Festool had to muddy the waters but using the word "Percussion" (PDC).
Was it just to differentiate it from the BHC that uses SDS+?

 

[TelcoRandy]

I've always heard that SDS drills have a pneumatic hammering action and that regular hammer drills are mechanical hammering action... I imagine the percussion on the PDC is a reference to a mechanical mechanism? I don't know  [sad]

 

[elfick]

I've always heard that SDS drills have a pneumatic hammering action and that regular hammer drills are mechanical hammering action... I imagine the percussion on the PDC is a reference to a mechanical mechanism? I don't know  [sad]

Hmm... wikipedia would seem to agree with you...

Lower power units are usually called "hammer drills," typically have a "cam-action" or "percussion" hammering mechanism, in which two sets of toothed gears mechanically interact with each other to hammer while rotating the drill bit. With "cam-action" drills, the chuck has a mechanism whereby the entire chuck and bit move forward and backwards on the axis of rotation, the motion is tied to the rotation of the chuck. This type of drill is often used with and without the hammer action but it is not possible to use the hammer action alone as it is the rotation over the "cams" which causes the hammer motion. These units are usually smaller and are commonly powered by cordless technology.

http://en.wikipedia.org/wiki/Rotary_hammer_drill#Types:_.22Cam-Action.22_.28Percussion.29_and_.22Electro-Pneumatic.22

I've learned my new thing for the day... Time to go home.

 

[JimRay]

You'd be surprised, most people don't know the difference between an impact and a hammer drill...

Ummm, no I wouldn't. Can't tell you how often I have explained this, sadly, too many times to people that should already know the difference.

Jim

 

[GregBradley]

It seems most people are not only ignorant, they are determined to stay ignorant of their ignorance. If they don't know there is a difference, they assume there is no difference.

 

[Pareto]

Thanks for posting the videos guys - I was aware of the difference in functionality, but I have to confess I wasn't aware how the impact driver's mechanism actually worked. The cut-away mechanisms and the high speed video really demonstrate the mechanism well.