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how do you shape a trade point without screwing up temper?

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uwe:
File? Hard to do! I did it with an angle grinder and very thin blade on it (about 1mm). So it doesn`t get too hot. If you think cool it with water while working on it. first I did it with these bigger sort of metal shears (sorry don`t know the word for it) leverage metal shears???
Problem doesn`t work so exact and depending on from which side you cut it rounds up, which is later to be flatened.
Hope this helps!
Uwe

Granite Mtn:
Use angle grinder to cut out and rough in angle, temper, a map torch will work to temper no need to get fancy its only bone you have to shoot through.  I use old skill and table saw blades.  Make very dependable heads and super sharp!  Just a tip, I only rough in blade then mount then finnish the angle with a 1in x 36in belt sander this allows you to straighten the tip up if you mounted the broad head slightly off.  The sander removes metal with out changing the temper.

Little John:
I have used circular saw blades from a saw mill, by the time I got them cut out with a hand held angle grinder they were too hard to sharpen with a file and had to be annealed with heat. I used to keep the stoick quenched while cutting but now dont bother. I think just try and see where you end up and then make corrections to your process if nescarry. A 4 1/2 inch side grinder with the thin cutting blades works good.   Kenneth

crooketarrow:
   I also use saw mill blades.I use a grinder and go slow when it starts to get warm have a cup of water and keep in cool.
  Or I have tempered mine before by heating cherry red then dip in water with ice. What ever you use it will give you different Rockwell hardest.Water different oils etc.

PeteC:
I know this does'nt answer your question recurve,but,I cut my points out on a chop saw,(mostly old bandsaw blades),bevel the edge,then heat cherry red and quench in motor oil,3 times.It seems like they hold an edge better. JMHO God Bless

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