Tire Shredder Cutter Head Info

blake in spokane · Aug 14, 2020

Has anybody worked on one of these. What material for cutter body & replacement knives, cutter clearences ?

Milland · Aug 14, 2020

Nope, but you're going to want pretty damn hard cutters to get through the high-tensile (around 300Ksi) steel wire beads. So a tough, hard, wear-resistant steel, perhaps D2?

But consult some of the better tool steel suppliers for other suggestions. And maybe Carbidebob might have a suggestion for an impact-rated carbide that could be inserted in a softer steel body if the customer wanted a longer lived (hopefully) choice at higher cost.

Check out this page for some thoughts: Crucible Tool Steel and Specialty Alloy General Information So maybe D7 and powder metal specialty alloys are worth looking into. And get the current cutters XRF'd to find out what they are.

Archer120x · Aug 14, 2020

Hardox wear steel

Milland · Aug 14, 2020

Archer120x said:
Hardox wear steel

I don't think that's hard enough to deal with tire bead material. Only ~50's RC.

john.k · Aug 14, 2020

I once made a lot of components for a tire shredder.....on a cash before delivery basis on each roller /cutter.......the bearing supply company foolishly gave them credit,........however tempis fugit ,and lately Ive heard that car tires dont have wire in them ,carbon fibre ,kevlar etc........I do know on my effort the whole thing was wrapped in wire until the motor overloads went ,or a coupling broke.I also know the shredder group went broke ....or maybe just drowned in a mountain of tires they had agreed to take.......So the whole caboodle went up in smoke .......lots of it,and very black............So ,experts ,are tires now zero steel and burnable in a cement kiln?

Milland · Aug 14, 2020

I'm pretty sure that tire beads are still predominantly steel in auto and truck tires. You'll find other materials in specialty tires like some bicycle clincher tires when you want "foldability".

Belts can be polymer and/or steel.

What's In a Tire | U.S. Tire Manufacturers Association

john.k · Aug 15, 2020

I ask because the guy I did the work for has been in tire recycling for some 40 years......I use the term "generically"......hes made a great deal of money over the years being two jumps ahead of the law..........anyhoo ,his last major effort ,resulted in 20 acres of tyres and a complex company structure based in Panama......Recently the state seized the land after a long court battle ,and had the tires removed .....it was reported that the car tires could be burnt in a cement clinker kiln,but the truck tyres had to be shredded,due to steel content.....so I wondered.

BT Fabrication · Aug 20, 2020

I Believe they made them from A2 plate. tolerance varies for the size.

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