Help Required for SDS Max

[Bop]

I was given an SDS max drill with an assortment of drill bits and "extensions" for going through thick walls.

I have only used this occasionally for drilling holes for putting in a new toilet waste or wash-basin waste etc. This tool really does the trick, no matter how tough the wall. However, the problem I have is trying to take it all apart again (eg the core drill bit from the extensions and the extensions from each other)!

It all came with a set of drift keys but I cannot get them to separate the various components. I usually have to resort to heating up the core bit (with boiling water) and then giving the extension part a mighty whack with a lump hammer. This works but I am sure this is not the right way!

As you will tell from this, I am not techy minded when it comes to this sort of equipment. No doubt this will have given many of you a good laugh but I really would like to know the correct way to do this!

 

[marshman]

You've about got it, hold the shaft of one, point the bits downwards, smack the shaft of the lower bit, turn 180 and repeat.

 

[Bop]

You've about got it, hold the shaft of one, point the bits downwards, smack the shaft of the lower bit, turn 180 and repeat.

Thanks for this - I thought there might be some cool trick of which I was unaware! Generally I have found things often work, eventually, if a big enough hammer is involved (or even threatened).

On a serious note, though, is it better to grease the connections before putting together, or not - or doesn't it make any difference?

 

[marshman]

It's been a while since I last used sds + , I've been thinking about it and its the collar you hit, you still keep the weight of the bit
hanging downwards.
As for greasing I've never heard of that, and as they grip by friction it kinds of defeat the point.

 

[Bop]

OK. Thanks for your advice.