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Street Sweeper Bristles Vs. Steel Sheets.

When it comes down to it there is nothing better than manual tools for your Lock pick Set, whether they be retail, homebrew, macgyver style. DIY'ers look here.

Street Sweeper Bristles Vs. Steel Sheets.

Postby Indica » 27 Mar 2006 21:23

I have recently been reading on making picks after getting bored of this set ive had for a few months, after reading countless post i noticed that people seem to scavenge for the materials they are going to make their picks out of and no talk really about buying high grade materials.

At my local builders supply you can order all types of steel sheets with all kinds of different gauges (Thickness). Is there something special about street sweeper bristles that make them worth searching for ? Or is it the satisfaction of making somthing out of what otherwise would have been trash ?
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Postby Indica » 27 Mar 2006 21:28

Another thing i wanted to point out was people using hacksaw blades. This is a realitivly expensive item considering you only get a few in a pack when u can but the same quality metal in sheet form for way less.
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Postby bembel » 27 Mar 2006 22:37

Right, but not too many people have the machines to cut large steel sheets. They also don't know what steel to ask for.
Sawblades just have the right size/material and you can find them everywhere. That makes it the prefered material for hobby lockpickers.

Let's say I'd find a shop which does the cutting, which steel would you recommend? (technical name)

P.S. I've also never seen a street sweeper bristle in my life. I prefer feeler gauges (on tape).
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Postby Indica » 27 Mar 2006 23:17

True many people dont have the machines to cut large sheets of metal. Maybe this is why the popularity of finding the scraps is seen though out this forum.I have yet to actually order any sheets metal from the builders supply because i wanted to read more on different types of metals and their flexibility and strength. Im sure where ever you can buy the metal they can cut it into square like tiles that can easily be stored in a small space.
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Postby pizarro » 28 Mar 2006 5:31

As you are not likely to want thick sheets of metal to make picks from, using a recipricating jigsaw with a metal cutting blade, should be enough tools to cut out small pieces of the metal that you can then grind.

But the reason why people may keep going for hacksaw blades could be that they are already heat treated, and as long as you don't overheat them when shaping/grinding, they are ready to go.

The metal hacksaw blade can be used to cut metal sheets.
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Postby p1ckf1sh » 28 Mar 2006 8:07

Indica wrote:True many people dont have the machines to cut large sheets of metal. Maybe this is why the popularity of finding the scraps is seen though out this forum.I have yet to actually order any sheets metal from the builders supply because i wanted to read more on different types of metals and their flexibility and strength. Im sure where ever you can buy the metal they can cut it into square like tiles that can easily be stored in a small space.


I would be interested in a discussion regarding metallurgy as well. Hacksaw blades are fine but what really bugs me is their looks. I have not found a good way to get the finish (paint) off easily, without wasting huge amounts of sandpaper (beacause it gums the paper up) so I leave the handles and only remove the paint from the tips. Looks shitty. Another thing is the removal of the remaining teeth on the handle area, which really takes me ages.

I think the best way would be to go for a sandwiched design: have one kind of steel that is already machined into a "pick blank" form including handle and tip in desired thickness, say 0,4mm. For this use a really good kind of steel, whatever that might be. Then have another, maybe cheaper sort of steel, premachined into a form that just resembles the handle. Depending on how thick one likes his picks you could for 0.55mm. Then take two handle pieces, add the pick blank piece into the middle, clamp in vice, drill two holes into the handle area and put a rivet through them. That way you have a new pick in a matter of minutes (minus shaping the tip) and this would most likely look pretty nice and professional. You have the desired thickness for whatever tight keyways you are manipulating, but a handle that has some substance to grip (in the above example the handle area overall woult be 1.5mm).

A picture would say more than 1000 words, but I am too lazy to set up hosting and draw something right now.

Actually, what about "knife steel"? What kind of steel is usually used to make the blades of pocket-knifes? One day out of sheer boredom I dremeled a bogota rake pattern into an old swag knife, the size of a micro-Leatherman. I have o admit that the rake got out thinner than intended but it is still rigid like nothing I ever made from hacksaw. I think whatever metal is used for this should make a good middle part in the design described above.

Or is more rigidity automatically equal to "it will break, not flex, when abused"?
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Postby Octillion » 28 Mar 2006 12:44

p1ckf1sh wrote:I have not found a good way to get the finish (paint) off easily, without wasting huge amounts of sandpaper (beacause it gums the paper up) so I leave the handles and only remove the paint from the tips.

Use acetone.

p1ckf1sh wrote:Another thing is the removal of the remaining teeth on the handle area, which really takes me ages.

It shouldn't take more than a few seconds on a grinder.
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Postby p1ckf1sh » 28 Mar 2006 14:14

Octillion wrote:
p1ckf1sh wrote:I have not found a good way to get the finish (paint) off easily[...]

Use acetone.

Acetone will actually remove paint that is dry and old? I always thought it will only remove/dissolve rather fresh paint finish?! Gonna give it a try.

Octillion wrote:
p1ckf1sh wrote:Another thing is the removal of the remaining teeth on the handle area, which really takes me ages.

It shouldn't take more than a few seconds on a grinder.

Don't have one. I am a Dremel guy and removing the teeth with the it eats up cutting wheels or sanding barrels like nothing else. Maybe I can find another way, too broke to buy more tools right now...
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Postby Octillion » 28 Mar 2006 14:24

Acetone will dissolve the paint no matter how old it is. Just put some hacksaw blades in a bottle with acetone, and let them soak for a few minutes. Anything that doesn't come off from soaking can be removed by scrubbing it off with an acetone soaked paper towel.
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Postby p1ckf1sh » 29 Mar 2006 5:00

Octillion wrote:Acetone will dissolve the paint no matter how old it is. Just put some hacksaw blades in a bottle with acetone, and let them soak for a few minutes. Anything that doesn't come off from soaking can be removed by scrubbing it off with an acetone soaked paper towel.

Thanks for the info. I did not have any acetone handy, but some terpentine (sp?) left over... it wasn't quite as good as you make the acetone sound, but it worked to a degree that made it possible to brush off the paint with an old toothbrush in a matter of seconds. Thanks for the info. Now they are nice and shiny, gonna sand em and take some pics later on, so anyone can have a laugh at my homemade bogotas and HPC compgen picks.
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Postby krept » 29 Mar 2006 17:45

IMO ( :wink: ) there is a pretty good discussion here regarding steel choice

http://www.lockpicking101.com/viewtopic.php?t=11951&highlight=.

Ability to cut a strip of steel from stock sheet is actually significant as you work with fairly narrow pieces and the steel could bend/warp. In speaking with distributors, they shear off spring steel from larger stock and the most narrow they usually go is 1/4". Bristles are more narrow, which comes into play below.

One benefit of the bristles is that, when formed like Raimundo's Bogotas... the handle becomes the tension wrench. This makes bristles great for portability, or for daily carry. One parallel to this would be... having a big fixed bladed knife would be nice, but for portability sake, a good folding knife can do a LOT.

A professional would certainly want a whole set of tools... those made from bristles fill a particular niche. For many of us, however, I'd think that niche covers a broad area of locks we would encounter. Instead of carrying a case with picks and tension wrenches, I have my two picks stored in my wallet.

Regarding metallurgy... or at least some qualities of the steel used in bristles... the bristles are made from mid to high carbon spring steel that is already tempered, meaning it is heat treated to obtain an optimal hardness. They are expected to last as long as possible without bending OR breaking.

Since the bristles last fairly well scraping asphalt day in and day out and we are only lightly scraping on... brass?... the wear is much less and the chance of the tool breaking is very low unless you mess up the temper.
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