From the shop
I write down the setups, abrasive choices, tracking adjustments and maintenance checks I use at the grinder.
Articles 97–108 of 127
Archive page 9
Filed by what you are doing at the machine — grinding, sharpening, heat treat, maintenance, or running the business side of a shop.
Belts, electricity and wasted steel are the real cost of running a 2×72. Here is how I stretch belt life, waste less bar stock, run the motor smarter with a VFD, and keep the grinder maintained so it costs less.
A grinder drifts a little over time: a wheel shifts, a platen goes out of square, tension creeps. Here is how I check alignment and tracking on a 2×72, what tools you need, and the routine that catches drift early.
I hear the same three things about 2×72 grinders: only for pros, too expensive, hard to learn. I build them and grind on them, so here is what is true, what is not, and what actually matters.
A steel 2×72 stays where you bolt it. An aluminum chassis weighs less than a comparable steel one, so it is easier to reposition and haul to a show. Here is how the material and the Torus tilt help.
A fixed-speed motor is cheaper and simpler. A variable-speed motor with a VFD lets you match belt speed to the steel and the grit. Here is how they compare on cost, control and torque, and why I run a VFD.
The hammer gets a blade close. The 2×72 gets it right. Here is how bladesmiths use a belt grinder after the forge for scale removal, profiling, bevels and finish, and the features that matter when forged steel meets a belt.
Most knife shops are a corner of a garage. Here is how a CNC-machined aluminum 2×72 keeps a small footprint, tilts out of the way, and swaps attachments on one arm for a full grinding station in one corner.
Grinding makes heat, and heat that stays in the platen and bearings shortens their life. Here is how an aluminum frame conducts it away, why the Torus platen runs cooler than steel, and what that means over a long session.
Knife shops are humid, dusty and full of quench water. Here is why 6061 aluminum shrugs off that environment, how it forms its own protective oxide, and what it means for how long your grinder stays tight and true.
Wood, bone, stabilized burl, G-10, Micarta, even mammoth tooth: every handle material grinds differently. Here is how I pick between natural and synthetic scales, and how I shape each one on the 2×72 without burning it.
A grinder you are not maintaining is a grinder you are using. Here is why I build the Nova and Classic from 6061 aluminum: corrosion resistance, less weight on the bench, and adjustments that stay put between sessions.
The Bowie slices and chops with a big belly and a clipped point. The tanto pierces with a reinforced tip and two flat grinds. Here is how the two differ in use, and how I grind each on the 2×72.
Built to order
I answer my own email. Tell me the work you do and which grinder you are considering.
