Diamond Core drill

[ATTQ]

I compared the two side by side. The old one has just lost its guts.

Sounds like one of the brushes isn't contacting properly. probably just worn down. Though maybe try slapping the sides few times in case it just not sliding due to dust. If its not the version with easy access to brushes you'd have to take the case off but changing brushes usually straight forward

 

[ATTQ]

Is the chaser any good?

Not used it in anger yet, should be good though, I've a makita vac so i'm hoping for a nice marriage and minimal dust when i do

 

[ATTQ]

These are the brushes, https://www.partshopdirect.co.uk/ma...on-brushes-brush-pair-cb419-hp1641-p191962-4/ if you see the line half way up thats the wear limit. I bought my 9" bosch angle grinder for pence because it was dead and it was just needing new brushes.

 

[robinbanks]

As the old saying goes.......on the whole it doesn't owe me anything. It's 10 + years old, and it's got me out of a hole or two in the past.

I'd hope it got you into more holes than it got you out of, so to speak

 

[securespark]

Sheeeet . You beat me to it!

 

[Elsa TLC]

I'd hope it got you into more holes than it got you out of, so to speak

That's rude!

 

[chirpychippy]

I went to ITS this morning with the view to spending £575.00 on the top most powerful Makita.

However it was alot bigger and heavier.

So I went for the £287.00 lesser model.
It's what I had before.

I only had a 1½ hole through brick but it was smooth and effortless. Far better than the Dewalt that's roughly the same price.

The bigger test will be 127mm. But the 1½ the clutch worked as I could of only hoped.

Watch for more comment but so far I would recommend for price and performance. View attachment 375723

I've got this exact model, I've used it for 6 inch core holes. Often it's a combination of substrate and core bit, cheap core bits are cr&p, if your coring wet brick then it's awful, if your coring flint you need this drill, 2 core bits and a bucket of swear words. I core five inches into engineering brick, I used the hammer function...

 

[robinbanks]

You hammer mode a core bit?

Savage

 

[Exedon]

You hammer mode a core bit?

Savage

Marcrist 850 core bits are intended to do exactly that percussion drill required not sds!
Very quick cutting & slow diamond wear.

 

[robinbanks]

Percussion is not hammer, by the way

 

[chirpychippy]

You hammer mode a core bit?

Savage

Not really out of choice more out of frustration. The extension was built so close to the neighbours extension I couldn't do the hole from outside.

With bricks so hard I'd normally drill the circumference of the hole with sds bits and punch it out from outside, but you can't do that from inside as you blow the face of the brick.

I wouldnt normally use hammer/percussion but with some jiggery pokery it helped with the final 10mm on normal speed. Took about 2.5 hours to drill a 5 inch core hole.