I WILL NAME 10 SAW BLADES HERE BUT NOT ALL BLADES ARE SUITABLE FOR PUZZLES. I AM JUST TRYING TO GATHER SOME INFO FOR THE ONE WHO WANTS TO UNDERSTAND THE GEOMETRY OF THE TOOTH IN GENERAL.(all information is taken from all around ( books, personal experience, Freud company etc.) 
 
    No 1.THIS IS A FLAT TEETH SAW BLADE(FT) IT CUTS: SOFT WOOD,HARDWOOD, RIPING,MULTIRIP.Also this is a good blade for grooves (Burr puzzles, slots for boxes , because the slot is Square.  
 
    No 2.THIS IS TRAPEZE TEETH SAW BLADE. IT CUTS: TUBES, SECTION PIPES,IRON ANGLES.Not recommended unless you decide to make Iron puzzles!" 
 
    No 3.This is a conical teeth saw blade.It cuts:Laminate,bilaminated, scoring saw blade(precut)" 
 
    No 4.This is a triple chip (TC)Blade cuts laminate wood, mdf, chipboard,plywood,plexiglass, aluminum,plastic material,non ferrous material, Picture frame,wood composites.Beleave it or not I like using this blade mostly,but i have also other preferences. " 
 
    No 5.Smooth teeth.This Blade cuts Soft wood, hard wood, chipboard,plywood, ripping, crosscutting,wood composites. " 
 
    No 6. Incline teeth.This Blade can be LH or RH and cuts Soft wood, hard wood, chipboard,plywood, crosscutting,a scoring blade(precut). 
 
    No 7. Axial teeth.This Blade cuts Soft wood, hard wood, picture Frame crosscutting, Plastics,Plexiglass.I have order this blade and soon i am going to have an opinion. In theory this must be the perfect blade for crosscutting puzzles. 
 
    No 8. Concave teeth.This Blade cuts laminate and bilaminate.. 
 
    No 9.Round teeth.This Blade is special for Soft wood, and ripping.It leaves no marks on the side of wood.Like planning. 
 
    No. 10.Alternate top bevel.And finaly (ATB) This Blade can cut Soft wood, hard wood, chipboard,plywood, MDF, Picture frame, Ripping ,Cross cutting.This Blade has the most different rake angles to much the Perfect need. 
 
    The "a" is the rake angle of the tooth.Basic rule: The greater rake=aggressive cut& more tear out on other side. the lower rake=less tear out but requires feed pressure.Ripping=15-20 degree.Cross cutting 10-15 degree. 0 & less degree are for: Radial-arm saws & miter compound saws ,preventing the blade to drive aggressively to the wood.Hard wood,softwood 15-25 degree.Laminate,plywood 5-15 degree. Profile and tubes 0-5 degree.  
 
    this is a negative degree . from 0 to -10 degree is for plastic, aluminum, and laminate.  
 
    A few information using saw blades now.The Teeth should Project from the piece equally to the Height of the tooth. Increase or decrease to improve Quality. 
 
    Now in the picture you see 4 teeth are entering the wood.The number of teeth that should cut the wood (at the same time should be 3-4.Any teeth less than that The saw blade vibrates and leaves marks on wood. 
 
    Ok this is the Pich of the teeth you all know that.What you probably would see now is that there is a very nice information how to calculate the above 3-4 teeth entering.Here is How:

    P=S x1.4142/3

    In words Pitch equals to S(thickness of the Piece multiplied by 1.4142 and divide by 3 if you want 3 teeth inside the wood or divide by 4 if you want 4 teeth entering. There is also a Formula for the Teeth.And this is:

    Z=Dx3.14/P.

    Number of teeth Z equals to saw blade diameter multiply by 3.14 and divide by Pitch. The following formula (quick way) is When you know the Diameter of the sawblade and the thickness of the wood,and you are looking for the Teeth

    Z= Dx8/S

    Get as close as possible to the above formulas and you will have good results. 
    ATENSION . The Above formulas are valid for crosscutting. Now i am not going to talk about (speed and feeding) 2 also very important factors, because i leave this to your sense filling. It would matter if we had an automatic feed and tunable speed saw (Wow) I hope that you are helped with the above and if you did not understand something please...read again(I do that a lot)  
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