Cant drill hole deeper...
#1
11-10-11, 08:01 PM
Join Date: Nov 2011
Location: China
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Cant drill hole deeper...
Hey,
have managed to drill 4 holes 5cm into the wall. It appears to be concrete no drywall at all. However at a depth of 5cm i can't seem to get any deeper. I am using a hammer drill and concrete drill bit...
I've inspected the hole and the end of the hole looks gray so i don't understand. Any advice? Should i keep trying to power through or should i just cut the screws and use 5cm instead of 7cm to mount the pull up bar? The supplied screws are exactly 7cm long... thanks for advice. I'm just worried there might be something 'metal' in there or whatever.
Here's a pic (excuse the messiness i couldn't decide where to put the holes):
Imagebin - A place to slap up your images.
Imagebin - A place to slap up your images.
The only worry is would 5cm anchor be enough to support the fixture plus about 150kg of load.
have managed to drill 4 holes 5cm into the wall. It appears to be concrete no drywall at all. However at a depth of 5cm i can't seem to get any deeper. I am using a hammer drill and concrete drill bit...
I've inspected the hole and the end of the hole looks gray so i don't understand. Any advice? Should i keep trying to power through or should i just cut the screws and use 5cm instead of 7cm to mount the pull up bar? The supplied screws are exactly 7cm long... thanks for advice. I'm just worried there might be something 'metal' in there or whatever.
Here's a pic (excuse the messiness i couldn't decide where to put the holes):
Imagebin - A place to slap up your images.
Imagebin - A place to slap up your images.
The only worry is would 5cm anchor be enough to support the fixture plus about 150kg of load.
#3
11-10-11, 09:10 PM
Join Date: Nov 2011
Location: China
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I am using a metal bit... it is silver color says 'for masonry' on the package. The hammer drill also came with some black drill bits but i think they are for wood.
I managed to get one hole slightly deeper than the one that won't go deeper.
How can i be confident it is a steal plate/rebarb and not gas pipe? Does hitting metal make a distinctive sound? Drilling at full revs is quite scare i think lol. Thanks.
I managed to get one hole slightly deeper than the one that won't go deeper.
How can i be confident it is a steal plate/rebarb and not gas pipe? Does hitting metal make a distinctive sound? Drilling at full revs is quite scare i think lol. Thanks.
#4
11-10-11, 09:31 PM
I am using a metal bit... it is silver color says 'for masonry'
How can i be confident it is a steal plate/rebarb and not gas pipe?
#5
11-10-11, 09:42 PM
Join Date: Nov 2011
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Using the black drill bit i've gotten two holes the correct depth of 7cm... hopefully that means the rest will be fine (probably wasn't metal there but maybe the black drill bit is harder or something as shining a light in the hole there's no sign of anything shiny.)
#6
11-11-11, 06:52 AM
Member
Wood is rarely used in China and is frowned upon so a minimal amount is imported from Russia and the U.S.
It this a building of more than 3 stories? If so, you may gotten through the concrete cover of the real wall that is behind the drywall and have hit a rebar. Very often, the drywall is just milimeter or two away from the real concrete wall.
Do you hit the obstruction elsewhere? You could be hitting a horizontal rebar. If possible, try another spot at a different height and and vertical line (drywall is easy to patch) to to see if you find out of what the wall may be.
If it is concrete, you have hit gold and masonry anchors will be much stronger.
Dick
It this a building of more than 3 stories? If so, you may gotten through the concrete cover of the real wall that is behind the drywall and have hit a rebar. Very often, the drywall is just milimeter or two away from the real concrete wall.
Do you hit the obstruction elsewhere? You could be hitting a horizontal rebar. If possible, try another spot at a different height and and vertical line (drywall is easy to patch) to to see if you find out of what the wall may be.
If it is concrete, you have hit gold and masonry anchors will be much stronger.
Dick
#7
11-14-11, 10:36 PM
Member
Are you serious about supporting 150 kg. of load? If so, maybe you should think about going on a diet--unless you're intentionally bulking up to be a sumo wrestler (I know, wrong country). With that kind of weight (330 lb.), there are some NFL teams here in the U.S. who would love to put you on their roster.
