From the shop
I write down the setups, abrasive choices, tracking adjustments and maintenance checks I use at the grinder.
Articles 85–96 of 127
Archive page 8
Filed by what you are doing at the machine — grinding, sharpening, heat treat, maintenance, or running the business side of a shop.
Grind too much before heat treat and the edge warps in the quench. Grind too little and you spend hours on hardened steel. Here are the pros and cons, and the order I use on the 2×72 for every blade.
Stainless dust is not like carbon steel dust. It carries chromium and nickel, and a 2×72 makes a lot of it. Here is what the risk is, the collection and respirator setup I run, and the habits that contain it.
American-made is not a sticker, it is a phone number. Here is what buying a 2×72 built in the USA gets you: parts that fit, a builder who answers, replacement parts later, and a machine designed by a user.
I build 2×72 grinders in both 6061 aluminum and 3/8-inch steel, so I have no side to pick. Here is how the two wear over years in a knife shop: rust, flex, weight, cost, and which belongs on your bench.
Belts are the biggest recurring cost in knifemaking, and the wrong one wastes money twice. Here is how ceramic, zirconia and aluminum oxide belts differ, which grits to stock, and how to tell when a belt is done.
A 2×72 sharpens a knife faster than any stone, and ruins one just as fast if you rush. Here is my beginner’s guide to sharpening on a belt grinder: safety, belts and grits, holding the angle, and stropping.
Knifemakers bought the 2×72 first, but fabricators, machinists and artists use the same machine to deburr, radius, flatten and polish. Here is what a belt grinder can do in general metalwork, and the belts and setup for each job.
Belt speed at the platen depends on frame stiffness, wheel geometry, tracking, motor speed and drive-wheel diameter. Here is how machined aluminum wheels and chassis components keep a 2×72 belt steady, and why that matters.
Portable means you can move it to a show or a second bench. Stationary means mass, rigidity and less vibration. Here is how the two compare on weight, footprint and cost, and why I build one of each.
A 2×72 out of the box is a starting point. Here is how I customize mine: belt choices by task, jigs for repeatable bevels, attachments that swap on one arm, and upkeep that keeps it true.
A welded frame is what it is forever. A CNC-machined aluminum chassis has true bolt patterns and a standard arm, so upgrades bolt on. Here is how machining makes a 2×72 easy to customize, down to the powder coat.
A welded frame is only as square as the fixture and the welder’s day. A CNC-machined chassis is as square as the drawing. Here is what digital precision changes for a 2×72, and where manual fabrication still earns its place.
Built to order
I answer my own email. Tell me the work you do and which grinder you are considering.
