My two cents:
I work in Outside Sales in Houston for a fairly large tool supply company. I recently visited a band saw manufacturer's facility for a week to attend a training seminar related to band saw blades and nothing but band saw blades. I'd like to share information that I think might be beneficial to anyone who uses a band saw:
1. First R.C.Reichert is absolutely right about the bi-metal blades - DON'T waste your money on anything else! Keep in mind two things:
A: You are most likely sawing a
tough or
hard material (probably some grade or other of stainless steel since you are making a knife, though not necessarily) and metals have changed
drastically in the past few decades (I would even say in the past few years!). The same technology that Dad and Gramps used (forgive the pun here) just won't cut it anymore (no offense intended Dad and Gramps).
&
B: Technology has
always sought to address issues (call 'em problems if you want to). Yesterday's technology is; unfortunately, what most manufacturers are still using in their manufacturing process today in the band saw blade industry. Regarding bi-metal blades the process is called "
electron beam welding". That is a process where the cobalt (Cobalt is used in the preparation of magnetic, wear-resistant, and high-strength alloys.) part of the blade is welded (as a small thin wire section) to the blade backing material. This process has been around for decades and upon it's introduction, it was "the cat's meow". The teeth were then either machined or ground to form the sharp little cutting edges that make up the "business end" of the saw blade. Generally when this type of blade fails, it can be due to many factors (wrong feed or speed or a combination of the two, lack of sufficient coolant or total lack of it, improper tooth selection for the given application, weld breakage, or in many cases, tooth strippage (wherein the electron beam weld; being such a tiny area, can no longer hold up to the stresses being put upon it by one or more of the factors above). New technology has come along that gives an "edge" (no pun intended this time) to the tooth weld area by increasing the actual area of contact between the cobalt and the blade backing material in a process you could think of as "
Roll Laminate Welding". This new process involves high heat and high pressure to bond the cobalt to the blade backing.
Care to guess who holds the patent for this process? Most of you are already familiar with the company. It's
L. S. Starrett. They call it their "Bi-Metal Unique" process. Here's a link you might enjoy watching:
http://www.starrett.com/download/204_intenss_overview_0001.wmv This is not a sales pitch, but an offer to lend my knowledge to anyone who might benefit from my experience over the years. If you actually have read this post all the way to this point that might indicate one of two things: either I have made some sense or you were
awfully bored when you got to this post. Either way, Thank for your time! I'm done.