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why dont people use wippersnipper blades on spinners
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muzzoid



Joined: 04 Apr 2005
Posts: 42
Location: ballina N.S.W


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why dont people use wippersnipper blades on spinners

ive been wondering why spinner builders use saw blades designed for cutting wood instead of the blades designed for hacking at roots and tough vegetation on wippersnippers, they seem to be made from spring steel and have a very small number of teeth, ive seen one with only three teeth. Confused

Post Tue Jan 17, 2006 4:22 pm 
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Timothy Forde
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Well I my self have a brush cutter and the 4 teath blade is very nice however is light, small and like you said made to cut wood

A saw is made to cut metal by lots of really small hits so only 3-4 teath would stop that
I know Pussy Cat (Robot wars 4) used a 4 teath blade that took gashes out of other robot but did not seem to cut at all so it would act more like a spinner

Anyway if 3-4 teath was better at cuting metal all saw blades would use them though the blade would make a nice smaller spinner

http://www.robowars.org/forum/album_pic.php?pic_id=1137
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It's very light so for a secondary wepion on a feather would be nice good idea Very Happy
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Post Tue Jan 17, 2006 4:54 pm 
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Nick
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That's right, a 3 tooth saw blade wouldn't cut metal very well; it would function more like KE disk weapon (Orbit's weapon now has 3 teeth) and since a brushcutter blade is relatively light, it wouldn't do so well at that either.

One of the reasons for using a high tooth count saw blade is so that the teeth only take out small metal chips and don't get stalled while cutting so easily.
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Post Tue Jan 17, 2006 5:04 pm 
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DumHed
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saw bots need the smaller teeth to get them to cut without jamming up, but the heavy spinning disc bots tend to use less teeth to get bigger hits.

A whipper snipper disc with few teeth isn't really heavy enough to have the kinetic energy to make big hits at low enough rpm to get a good bite on the target.

edit: so, what Nick said Smile
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Post Tue Jan 17, 2006 5:06 pm 
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dyrodium
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Correct me if i'm wrong, but doesn't vertical limits use teeth designed for ride on mowers with deadly effect? Twisted Evil
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Post Tue Jan 17, 2006 6:23 pm 
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Knightrous
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Yep, Vertical Limits uses cut downs from 150mm flat Cox ride on mower blades. At RoboWars 2, Vertical Limits teeth were only bolted on in grooves and when we hit Vincent it bent the tooth up onto the groove at a 30-45 angle. we undone the bolts holding the tooth and they returned to there original shape...

Cox mower blades are a good source of high grade temperable steel, that is designed for cutting!
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Post Tue Jan 17, 2006 6:30 pm 
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muzzoid



Joined: 04 Apr 2005
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well i was more thinking of it as a ke disk. well if its too lite it could still be used for a template for a disk made of plate steel

Post Tue Jan 17, 2006 7:12 pm 
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dyrodium
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Don't for get a disk doesn't have to be all steel or tempered material, its the impact points that matter... Ti is a great material for those massive disks if you know how to use it... Smile
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Post Tue Jan 17, 2006 7:39 pm 
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wilko



Joined: 25 Sep 2005
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what about the black toothless blades
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Post Wed Jan 18, 2006 3:42 pm 
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Knightrous
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quote:
what about the black toothless blades


I'm guessing your talking about abrasive cutting wheels. Usually no one will use them because they explode quite easily when suddenly shock loaded.
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Post Wed Jan 18, 2006 3:53 pm 
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Big AL
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i remember asking something similer and trying something for my self. if you can take a hammer and hit it and break the disk you probly shouldn't be using it in a robot.
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Post Wed Jan 18, 2006 5:48 pm 
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original_carnage
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quote:

Correct me if i'm wrong, but doesn't vertical limits use teeth designed for ride on mowers with deadly effect?



Laughing You should see the concrete slab/floor here at the House of Carnage. There are 'slices' in it from where the Team Vertex guys sharpened Vertical Limits' blades in mid-combat (by driving back and forth so that the blade strikes the ground). No chunks out of the slab, just nice, neat cuts (some nearly 1cm deep).

For chunks though, you might eventually see a photo of a cavity brick (or short-person stand as is often the use) that VL did a cutting demo on......
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Post Wed Jan 18, 2006 8:36 pm 
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dyrodium
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Ah yes i've seen that video Very Happy sparks from a brick?! Laughing
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Post Wed Jan 18, 2006 11:14 pm 
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wilko



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how about diamond cutting blades
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Post Sat Jan 21, 2006 10:13 pm 
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Knightrous
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Because Diamond is the hardest substance known to man and the fact that it is a non-conductor, you cannot weld diamond to anything, so diamond blades are just blades with diamond glued/bonded to the metal. Same as tungsten teeth on saw blades..... Which are usually the first thing to come off when against hard metal.
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Post Sat Jan 21, 2006 10:59 pm 
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