Each mm you progress the resistance will increase exponentially.
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Surgical wiring SWA through screed
- Thread starter i_am_fubar
- Start date
Just be careful with that drill on the floor like that.
I guess it's got a clutch, but without a handle for your other hand you need to be especially careful to watch out for if it jams and spins...you could have a risk of slamming your hand into the floor, or spraining you wrist.
Not sure what you can do to mitigate the risk really, other than ensuring your hand isn’t on the side that would hit the floor.
Perhaps having the handle turned so it’s near to, or on, the ground (rather than pointing upwards) would help, so if the drill bit does catch there’s not much rotation before a solid surface stops it.
You might have already finished by now anyway
I guess it's got a clutch, but without a handle for your other hand you need to be especially careful to watch out for if it jams and spins...you could have a risk of slamming your hand into the floor, or spraining you wrist.
Not sure what you can do to mitigate the risk really, other than ensuring your hand isn’t on the side that would hit the floor.
Perhaps having the handle turned so it’s near to, or on, the ground (rather than pointing upwards) would help, so if the drill bit does catch there’s not much rotation before a solid surface stops it.
You might have already finished by now anyway
I've got a feeling he's about to learn more about the clutch on that drill, than ever before.
No, it really won’t.
It really will.
What’s your rationale for that?
Of course it will increase, but no way is it exponential.
Nitpicking - Wikipedia
At twice the depth (600mm vs 1200mm) the resistance will be a lot more than double.
I'm doubtful whether the drill will be man enough, unless the material is very easy going.
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At the risk of vanishing down a really boring rabbit hole of pointless waffle, the resistance will increase in a linear way. The drill speed will slow more than linearly, possibly exponentially due to the increasing resistance.
Whatever though, it will get much more difficult!
Whatever though, it will get much more difficult!
Not necessarily...
An sds drill bit, has a spade type tip, which is slightly wider that the shaft, which means it will drill itself a clearance sized hole for the drill shaft. The only way the resistance will increase dramatically, is if the is damp and the damp soaks the drill dust enough, to cause it to jamb the drill.
Not all the material is cleared, not even close. It takes a lot of clearing even at 300mm. The deeper the hole, the greater the build-up of ground up material.
So, in greatest 'horny bunny' fashion, I'm sliding it in and out as I go to clear dust. So far, no noticeable increase in general stiffness unless I hit a chonky bit of aggregate. The drill keeps spinning without issue too 
The drill clutch has been wrecked over the last 20 years by using 150mm core drills, so when it does clutch out, it's more annoying than dangerous.
The drill clutch has been wrecked over the last 20 years by using 150mm core drills, so when it does clutch out, it's more annoying than dangerous.
Having done a fair amount of horizontal and vertical drilling, I'll admit that going sideways with a big bit is so much easier than going down with a smaller one. Vertically, your dust pile keeps falling down the hole, at least this is piling up outside.
Have you really been driling for four days?!?
Oil wells have been drilled quicker. Have you either finished or ruined your hallway yet?
Oil wells have been drilled quicker. Have you either finished or ruined your hallway yet?
He's awaiting quotes to rescreed that hallway
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