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Posted by willshak on October 7, 2007, 12:34 am
on 10/6/2007 11:48 PM RicodJour said the following:
>
>> on 10/6/2007 10:55 PM Steve Barker LT said the following:
>>
>>> You need to rent or purchase a good hammer drill. You also may be
>>> encountering rebar.
>>>
>> No rebar. I'm drilling 3/4" diameter holes 2" deep in a poured concrete
>> sidewalk around my pool. The holes are to attach a mesh winter cover on
>> my inground pool. The holes are to hold the cover's 40 spring loaded
>> straps. Previously, I had been using the solid winter cover with water
>> bags. I just got tired of cleaning the water and debris that accumulated
>> on top of the cover when I went to open the pool in summer. I looked
>> enviously at my neighbor's mesh cover all winter and it was clean except
>> for a couple of twigs laying on top. Then I looked at mine and there was
>> a foot of dirty, leafy water after the rain and melting snow had pushed
>> the cover deeper into the clean pool water.
>> When I first start the drill, I can see the crushed concrete powder
>> coming out and forming a ridge around the hole. All of a sudden the
>> powder stops building and I can hear the drill bit kinda bouncing over
>> something. The bit never stops turning, it just stops cutting.
>> I wash out the hole and look in. The aggregate filler in this concrete
>> is small roundish pebbles, about the size of a green pea up to a lima
>> bean size with colors of yellow, orange, grey, or whitish. I may see
>> parts of one, or two, or maybe three pebbles intruding in the hole, the
>> tops of which look sanded from the drill rather than cut. At this time I
>> take the small sledge and a 12" long steel tapered flat nosed punch with
>> a 1/4" wide tip and try to crack the pebbles into smaller pieces that
>> the drill bit can handle. I think that the 3/4" hand tool star drill can
>> do a better job of cracking the pebbles with fewer blows since the star
>> drill will completely fill the hole and may crack two or more pebbles
>> with one blow.
>>
> The hammer drill (or better yet, rotary hammer) is one of the more
> indispensable tools - there's nothing that works even remotely as
> well. Your question is vaguely akin to someone asking which is the
> best brand of screwdriver to use as a chisel, 'cepting a screwdriver
> is a lot closer to a chisel substitute.
I don't see the analogy about using a screwdriver as a chisel when the
hand tool I was asking about is used for the purpose for which it was made.
> Yes, I know they used star
> drills for ages, and yes I know you could do it that way, but I'd
> borrow or rent one, or buy/sell on eBay to get the proper tool for the
> job. You'll find all sorts of projects for it.
> R
>
--
Bill
In Hamptonburgh, NY
To email, remove the double zeroes after @
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Posted by RicodJour on October 7, 2007, 2:27 am
> on 10/6/2007 11:48 PM RicodJour said the following:
> >> on 10/6/2007 10:55 PM Steve Barker LT said the following:
> >>> You need to rent or purchase a good hammer drill. You also may be
> >>> encountering rebar.
> >> No rebar. I'm drilling 3/4" diameter holes 2" deep in a poured concrete
> >> sidewalk around my pool. The holes are to attach a mesh winter cover on
> >> my inground pool.
> >> When I first start the drill, I can see the crushed concrete powder
> >> coming out and forming a ridge around the hole. All of a sudden the
> >> powder stops building and I can hear the drill bit kinda bouncing over
> >> something. The bit never stops turning, it just stops cutting.
> >> I wash out the hole and look in. The aggregate filler in this concrete
> >> is small roundish pebbles, about the size of a green pea up to a lima
> >> bean size with colors of yellow, orange, grey, or whitish. I may see
> >> parts of one, or two, or maybe three pebbles intruding in the hole, the
> >> tops of which look sanded from the drill rather than cut. At this time I
> >> take the small sledge and a 12" long steel tapered flat nosed punch with
> >> a 1/4" wide tip and try to crack the pebbles into smaller pieces that
> >> the drill bit can handle. I think that the 3/4" hand tool star drill can
> >> do a better job of cracking the pebbles with fewer blows since the star
> >> drill will completely fill the hole and may crack two or more pebbles
> >> with one blow.
> > The hammer drill (or better yet, rotary hammer) is one of the more
> > indispensable tools - there's nothing that works even remotely as
> > well. Your question is vaguely akin to someone asking which is the
> > best brand of screwdriver to use as a chisel, 'cepting a screwdriver
> > is a lot closer to a chisel substitute.
> I don't see the analogy about using a screwdriver as a chisel when the
> hand tool I was asking about is used for the purpose for which it was made.
Hence the 'vaguely akin'. I was going to go with the 'asking for help
selecting a horse drawn buggy' analogy, but I thought I'd stick to
tools.
Not sure why your Google search turned up dead ends. When I Googled
"star drill" it came up with a bunch of hits - Ace Hardware has them
and eBay as well.
http://www.acehardware.com/sm-dasco-pro-star-drill--pi-1292223.html
http://cgi.ebay.com/Enders-3-4-star-drill-and-7-8-long-chisel-used_W0QQitemZ260075794953
You'll be spending $10 or $20 on something you'll probably never use
again and it's going to take you far more time to do the drilling.
Your time, your money.
R
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Posted by RBM on October 7, 2007, 8:01 am
You are also going to have difficulty making any where near as clean and
straight hole as with a rotary hammer
>> on 10/6/2007 11:48 PM RicodJour said the following:
>> >> on 10/6/2007 10:55 PM Steve Barker LT said the following:
>> >>> You need to rent or purchase a good hammer drill. You also may be
>> >>> encountering rebar.
>> >> No rebar. I'm drilling 3/4" diameter holes 2" deep in a poured
>> >> concrete
>> >> sidewalk around my pool. The holes are to attach a mesh winter cover
>> >> on
>> >> my inground pool.
>
>> >> When I first start the drill, I can see the crushed concrete powder
>> >> coming out and forming a ridge around the hole. All of a sudden the
>> >> powder stops building and I can hear the drill bit kinda bouncing over
>> >> something. The bit never stops turning, it just stops cutting.
>> >> I wash out the hole and look in. The aggregate filler in this concrete
>> >> is small roundish pebbles, about the size of a green pea up to a lima
>> >> bean size with colors of yellow, orange, grey, or whitish. I may see
>> >> parts of one, or two, or maybe three pebbles intruding in the hole,
>> >> the
>> >> tops of which look sanded from the drill rather than cut. At this time
>> >> I
>> >> take the small sledge and a 12" long steel tapered flat nosed punch
>> >> with
>> >> a 1/4" wide tip and try to crack the pebbles into smaller pieces that
>> >> the drill bit can handle. I think that the 3/4" hand tool star drill
>> >> can
>> >> do a better job of cracking the pebbles with fewer blows since the
>> >> star
>> >> drill will completely fill the hole and may crack two or more pebbles
>> >> with one blow.
>> > The hammer drill (or better yet, rotary hammer) is one of the more
>> > indispensable tools - there's nothing that works even remotely as
>> > well. Your question is vaguely akin to someone asking which is the
>> > best brand of screwdriver to use as a chisel, 'cepting a screwdriver
>> > is a lot closer to a chisel substitute.
>> I don't see the analogy about using a screwdriver as a chisel when the
>> hand tool I was asking about is used for the purpose for which it was
>> made.
> Hence the 'vaguely akin'. I was going to go with the 'asking for help
> selecting a horse drawn buggy' analogy, but I thought I'd stick to
> tools.
> Not sure why your Google search turned up dead ends. When I Googled
> "star drill" it came up with a bunch of hits - Ace Hardware has them
> and eBay as well.
> http://www.acehardware.com/sm-dasco-pro-star-drill--pi-1292223.html
>
http://cgi.ebay.com/Enders-3-4-star-drill-and-7-8-long-chisel-used_W0QQitemZ260075794953
> You'll be spending $10 or $20 on something you'll probably never use
> again and it's going to take you far more time to do the drilling.
> Your time, your money.
> R
>
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Posted by hallerb@aol.com on October 7, 2007, 8:13 am
> You are also going to have difficulty making any where near as clean and
> straight hole as with a rotary hammer
> >> on 10/6/2007 11:48 PM RicodJour said the following:
> >> >> on 10/6/2007 10:55 PM Steve Barker LT said the following:
> >> >>> You need to rent or purchase a good hammer drill. You also may be
> >> >>> encountering rebar.
> >> >> No rebar. I'm drilling 3/4" diameter holes 2" deep in a poured
> >> >> concrete
> >> >> sidewalk around my pool. The holes are to attach a mesh winter cover
> >> >> on
> >> >> my inground pool.
> >
> >> >> When I first start the drill, I can see the crushed concrete powder
> >> >> coming out and forming a ridge around the hole. All of a sudden the
> >> >> powder stops building and I can hear the drill bit kinda bouncing over
> >> >> something. The bit never stops turning, it just stops cutting.
> >> >> I wash out the hole and look in. The aggregate filler in this concrete
> >> >> is small roundish pebbles, about the size of a green pea up to a lima
> >> >> bean size with colors of yellow, orange, grey, or whitish. I may see
> >> >> parts of one, or two, or maybe three pebbles intruding in the hole,
> >> >> the
> >> >> tops of which look sanded from the drill rather than cut. At this time
> >> >> I
> >> >> take the small sledge and a 12" long steel tapered flat nosed punch
> >> >> with
> >> >> a 1/4" wide tip and try to crack the pebbles into smaller pieces that
> >> >> the drill bit can handle. I think that the 3/4" hand tool star drill
> >> >> can
> >> >> do a better job of cracking the pebbles with fewer blows since the
> >> >> star
> >> >> drill will completely fill the hole and may crack two or more pebbles
> >> >> with one blow.
> >> > The hammer drill (or better yet, rotary hammer) is one of the more
> >> > indispensable tools - there's nothing that works even remotely as
> >> > well. Your question is vaguely akin to someone asking which is the
> >> > best brand of screwdriver to use as a chisel, 'cepting a screwdriver
> >> > is a lot closer to a chisel substitute.
> >> I don't see the analogy about using a screwdriver as a chisel when the
> >> hand tool I was asking about is used for the purpose for which it was
> >> made.
> > Hence the 'vaguely akin'. I was going to go with the 'asking for help
> > selecting a horse drawn buggy' analogy, but I thought I'd stick to
> > tools.
> > Not sure why your Google search turned up dead ends. When I Googled
> > "star drill" it came up with a bunch of hits - Ace Hardware has them
> > and eBay as well.
> >http://www.acehardware.com/sm-dasco-pro-star-drill--pi-1292223.html
> >http://cgi.ebay.com/Enders-3-4-star-drill-and-7-8-long-chisel-used_W0...
> > You'll be spending $10 or $20 on something you'll probably never use
> > again and it's going to take you far more time to do the drilling.
> > Your time, your money.
> > R- Hide quoted text -
> - Show quoted text -
harbor freight sells a hammer drill for 60 bucks bits a little more. a
great price for a occasional need tool.
star drills work but can take hours, hammer drill can do the same job
better in 5 minutes...
plus you have the tool for the next time you need a hole, or have
other jobs. the chisel bit is wonderful, used it once to hrak up a big
rock in my yard when planting some stuff.
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Posted by SteveB on October 7, 2007, 3:00 pm
> You need to rent or purchase a good hammer drill.
Go a step further and get a rotohammer. I bought a good Makita the other
day for $25 at a yard sale. It has a SDS bit system, and has both the demo
hammer and rotohammer mode.
A hammer drill will get it done. A rotohammer will get it done in less than
half the time. They can be had at pawn shops, in the local Quick Quarter
rags, and at yard sales for prices that make it so that if you don't use it
much, you don't lose a lot of money.
The other day, we were ripping out caliche from where we want to put a
walkway. I needed a trench about three feet long and a foot deep and wide
for a French drain. I got out the Makita, and was done in a couple of
hours.
Get the rotohammer. You'll be glad you did.
Steve
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