#1
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data on cut disc
I tried to decipher all the data on a disc for
the angle grinder. Here is the incomplete result: #! /bin/zsh # Symbols that seem to indicate: # - use safety gloves, earmuffs, and goggles # - for cutting only # - read the manual # - don't use a broken disc (?) # - use to cut Inox or SS # EN 12413 # a DIN standard: "Safety requirements for # bonded abrasive products" # 125*2.0/1.0*22.23 # outer_diameter*thickness/inner_diameter*thickness # in mm # MAX 80 m/s # RPM 12200 # speed when disc is at 125 mm # when disc is at 22.23, speed is 14 m/s! # see program below to compute this # AS 60 T INOX - BF # INOX is again Inox/SS # the rest I don't know # Fe/S/Cl = 0.1% # Some health related chemical property? rpm2ms () { local diam=$1 # e.g., 125 mm local rpm=$2 # 12200 RPM # --------- # 80 m/s local diam_in_m=$(( $diam / 1000.0 )) local pi=3.14159265 local c=$(( $diam_in_m * $pi )) local dist_per_min=$(( $c * $rpm )) local dist_per_s=$(( $dist_per_min / 60.0 )) printf 'm/s = %.0f\n' $dist_per_s } -- underground experts united http://user.it.uu.se/~embe8573 |
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#2
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data on cut disc
On Tue, 12 Dec 2017 13:57:36 +0100, Emanuel Berg
wrote: I tried to decipher all the data on a disc for the angle grinder. Here is the incomplete result: #! /bin/zsh # Symbols that seem to indicate: # - use safety gloves, earmuffs, and goggles # - for cutting only # - read the manual # - don't use a broken disc (?) # - use to cut Inox or SS # EN 12413 # a DIN standard: "Safety requirements for # bonded abrasive products" # 125*2.0/1.0*22.23 # outer_diameter*thickness/inner_diameter*thickness # in mm # MAX 80 m/s # RPM 12200 # speed when disc is at 125 mm # when disc is at 22.23, speed is 14 m/s! # see program below to compute this # AS 60 T INOX - BF # INOX is again Inox/SS # the rest I don't know # Fe/S/Cl = 0.1% # Some health related chemical property? rpm2ms () { local diam=$1 # e.g., 125 mm local rpm=$2 # 12200 RPM # --------- # 80 m/s local diam_in_m=$(( $diam / 1000.0 )) local pi=3.14159265 local c=$(( $diam_in_m * $pi )) local dist_per_min=$(( $c * $rpm )) local dist_per_s=$(( $dist_per_min / 60.0 )) printf 'm/s = %.0f\n' $dist_per_s } You've got 4" x 2mm cut off disks :-) In the last few years I have switched to 4" x 1mm cutting wheels. They are, I believe, some sort of epoxy material impregnated with cutting abrasive. They cut very noticeably faster then the 2mm wheels and when they do break the don't shatter and explode all over the place. -- Cheers, John B. |
#3
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data on cut disc
On Tuesday, December 12, 2017 at 1:57:41 PM UTC+1, Emanuel Berg wrote:
I tried to decipher all the data on a disc for the angle grinder. Here is the incomplete result: #! /bin/zsh # Symbols that seem to indicate: # - use safety gloves, earmuffs, and goggles # - for cutting only # - read the manual # - don't use a broken disc (?) # - use to cut Inox or SS # EN 12413 # a DIN standard: "Safety requirements for # bonded abrasive products" # 125*2.0/1.0*22.23 # outer_diameter*thickness/inner_diameter*thickness # in mm # MAX 80 m/s # RPM 12200 # speed when disc is at 125 mm # when disc is at 22.23, speed is 14 m/s! # see program below to compute this # AS 60 T INOX - BF # INOX is again Inox/SS # the rest I don't know # Fe/S/Cl = 0.1% # Some health related chemical property? rpm2ms () { local diam=$1 # e.g., 125 mm local rpm=$2 # 12200 RPM # --------- # 80 m/s local diam_in_m=$(( $diam / 1000.0 )) local pi=3.14159265 local c=$(( $diam_in_m * $pi )) local dist_per_min=$(( $c * $rpm )) local dist_per_s=$(( $dist_per_min / 60.0 )) printf 'm/s = %.0f\n' $dist_per_s } -- underground experts united http://user.it.uu.se/~embe8573 What is next? Your chainsaw? Lou |
#4
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data on cut disc
Lou wrote:
What is next? Your chainsaw? I actually have 2-3 of those! Or rather they belong to the organization. Mostly it is the older guys tho who are "knife geeks" including the chainsaw. Besides I have a sawhorse and sawing is one (of many) manual job I don't dislike, but of course if it gets too much it isn't pleasant or interesting anymore. -- underground experts united http://user.it.uu.se/~embe8573 |
#5
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data on cut disc
On Wed, 13 Dec 2017 11:53:58 +0100, Emanuel Berg
wrote: Lou wrote: What is next? Your chainsaw? I actually have 2-3 of those! Or rather they belong to the organization. Mostly it is the older guys tho who are "knife geeks" including the chainsaw. Besides I have a sawhorse and sawing is one (of many) manual job I don't dislike, but of course if it gets too much it isn't pleasant or interesting anymore. Organization? I was wondering who was funding your efforts to improve bicycle lock cutting angle grinders. Did someone say chainsaw? I don't think a chain saw would be suitable for the cutting bicycle locks, but you're welcome to try. http://802.11junk.com/jeffl/pics/chainsaw/slides/chain-saws-02.html One can never have enough chain saws. Also, I'm currently into knife sharpening (with a bottom of the line Harbor Freight 1x30" belt sander and collection of stones). I'm collecting the equipment I need to make my own custom knives, but so far have only make one mediocre knife (from a kit). -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#6
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data on cut disc
Jeff Liebermann wrote:
:On Wed, 13 Dec 2017 11:53:58 +0100, Emanuel Berg :wrote: :Lou wrote: : : What is next? Your chainsaw? :I actually have 2-3 of those! Or rather they :belong to the organization. Mostly it is the :older guys tho who are "knife geeks" including :the chainsaw. Besides I have a sawhorse and :sawing is one (of many) manual job I don't :dislike, but of course if it gets too much it :isn't pleasant or interesting anymore. :Organization? I was wondering who was funding your efforts to improve :bicycle lock cutting angle grinders. id someone say chainsaw? I don't think a chain saw would be suitable :for the cutting bicycle locks, but you're welcome to try. :http://802.11junk.com/jeffl/pics/chainsaw/slides/chain-saws-02.html :One can never have enough chain saws. https://i.pinimg.com/736x/20/d3/01/2...and-hobbes.jpg -- sig 119 |
#7
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data on cut disc
Jeff Liebermann wrote:
Did someone say chainsaw? I don't think a chain saw would be suitable for the cutting bicycle locks, but you're welcome to try. http://802.11junk.com/jeffl/pics/chainsaw/slides/chain-saws-02.html One can never have enough chain saws. Wow, nice photo! I have also used a Stihl (first row from the top) that was much smaller, bout half the size, and battery powered. Husqvarna (second row) should be Swedish by the way but nowadays probably all international and then made in the PRC so what does it all mean anymore. Also, I'm currently into knife sharpening (with a bottom of the line Harbor Freight 1x30" belt sander and collection of stones). I'm collecting the equipment I need to make my own custom knives, but so far have only make one mediocre knife (from a kit). Ha ha, cool! I now live in a wood house, so I thought I'd get knives and start practising throwing against the wall. Problem is there are a bunch of mildly crazy people here as well and I don't know how they would react if I picked that up. -- underground experts united http://user.it.uu.se/~embe8573 |
#8
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data on cut disc
On 12/13/2017 2:12 PM, Emanuel Berg wrote:
Jeff Liebermann wrote: Did someone say chainsaw? I don't think a chain saw would be suitable for the cutting bicycle locks, but you're welcome to try. http://802.11junk.com/jeffl/pics/chainsaw/slides/chain-saws-02.html One can never have enough chain saws. Wow, nice photo! I have also used a Stihl (first row from the top) that was much smaller, bout half the size, and battery powered. Husqvarna (second row) should be Swedish by the way but nowadays probably all international and then made in the PRC so what does it all mean anymore. Also, I'm currently into knife sharpening (with a bottom of the line Harbor Freight 1x30" belt sander and collection of stones). I'm collecting the equipment I need to make my own custom knives, but so far have only make one mediocre knife (from a kit). Ha ha, cool! I now live in a wood house, so I thought I'd get knives and start practising throwing against the wall. Problem is there are a bunch of mildly crazy people here as well and I don't know how they would react if I picked that up. "hope is not a plan" If you're living with crazy people, developing a working relationship with throwing knives might be a good idea. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#9
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data on cut disc
On Wed, 13 Dec 2017 21:12:11 +0100, Emanuel Berg
wrote: Jeff Liebermann wrote: Did someone say chainsaw? I don't think a chain saw would be suitable for the cutting bicycle locks, but you're welcome to try. http://802.11junk.com/jeffl/pics/chainsaw/slides/chain-saws-02.html One can never have enough chain saws. Wow, nice photo! Thanks. I had far too many saws (and bicycles). Time to downsize. The three Homelite Super E-Z saws in the foreground are rather old. 16:1 mix and no chain brake. However, they are somewhat of a collectors item due to the compression release feature. So, I traded the local handyman all 3 Homelite saws for some work on my property. I have also used a Stihl (first row from the top) that was much smaller, bout half the size, and battery powered. The Stihl battery powered saws: https://www.stihlusa.com/products/chain-saws/battery-saws/ are really nice. I've played with one and like it for limbing and light work. Not having to mess with gas, oil, starting, and fuel system maintenance is well worth it. Stihl probably would not have offered a battery operated saw were it not for the growing number of chain saw emission regulations. It's unlikely that a 2 cycle engine will pass various proposed draconian emission regulations. It would require either a 4 cycle engine, which tends to be underpowered, or an electric motor. I have no idea which way the industry and customers will favor. Husqvarna (second row) should be Swedish by the way but nowadays probably all international and then made in the PRC so what does it all mean anymore. The two Husqvarna saws are coincidentally an oddity. The 136 and 41 look and are almost identical. The only difference I could find was the older 136 was made entirely in Germany, while the 41 was partly made by Poulon and probably has some components that were made in China: https://en.wikipedia.org/wiki/Husqvarna_Group#Brands Higher end Stihl products, that are sold in the USA, are mostly made in the USA: https://www.b4usa.com/stihl-inc/ However, the MS-180 in the photo was made in China: http://blog.stihl.com/stihl-worldwide/2013/11/stihl-china-quality-made-stihl/ Incidentally, I replaced the rather narrow width chain and bar on the MS-180 with a wider and more standard size chain. Cuts much better now and needs to be sharpened less often: https://www.ebay.com/itm/192054090789 Also, I'm currently into knife sharpening (with a bottom of the line Harbor Freight 1x30" belt sander and collection of stones). I'm collecting the equipment I need to make my own custom knives, but so far have only make one mediocre knife (from a kit). Ha ha, cool! I now live in a wood house, so I thought I'd get knives and start practising throwing against the wall. Problem is there are a bunch of mildly crazy people here as well and I don't know how they would react if I picked that up. I have a similar problem with friends and neighbors. I've found that offering to sharpen their kitchen knives converts suspicious neighbors into more tolerant neighbors. I also got a few extra points by sharpening some Norelco shaver blades. Better neighborhood public relations through bribery. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
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