Disclaimer Notice
Last updated on Wednesday, September 20, 2023 05:47:08 AM Mountain US Time Zone


▪ Please review all of the precautionary notes below & the Personal Safety Equipment page.

▪ Failure to comply with these warnings may result in personal injury.

▪ Follow & observer all safety requirements set forth by the American National Standards Institute, ANSI B11.10.

All practices described herein are to be used at the discretion & risk of the reader.

Opinions expressed are those of the author or the quoted source.

The author is not a machinist, a tool maker or an engineer but a retired Research Psychologist.

No information provided herein should be construed to represent professional advice or best practice.

All information is provided to help hobbyists & interested parties gain a better understanding of the tools & techniques described.

Care has been exercised to provide accurate information but the author cannot be held responsible for information that is incorrect or out of date.

Always take all proper safety precautions such as wearing industry approved (ANSI) protective eyewear, breathing filtration, hearing protection, appropriate clothing, adequate illumination, good ventilation, & secure footing.

Do not wear loose clothing, jewelry or unrestrained hair styles. Never wear gloves.

▪ Refer to the Material Safety Data Sheet (MSDS) for info regarding the properties of a particular material. Dust from grinding tool bits & other materials is dangerous if inhaled.

▪ Assure shop observers also have proper protective eyewear & hearing protection.

▪ Beware of creating a flammable condition or an explosive atmosphere (liquid, vapor or dust) within the work area. Identify all potential ignition sources within the work area.

▪ Have the appropriate type of fire extinguisher readily available inside the shop.

Keep children, animals, clutter & trip hazards away from the work area.

▪ Secure tools & the work area when not in use.

▪ Do not  converse with others or allow them to interrupt you while performing cutting operations.

Cutting & grinding metal or wood can result in exposure to & inhalation of toxic materials. Refer to the MSDS for the properties of a particular material.

Power tools & shop practices are dangerous. Read, understand, & follow all directions & precautions provided by the equipment manufacturer.

Directly contact the manufacturer if you have any questions or problems; often they have manuals available on their site.

Consult knowledgeable people in the appropriate forums if an equipment manual cannot be obtained.

▪ Keep all machinery (mechanical & electrical) in proper working condition, including lubrication. Replace worn or broken parts.

▪ Assure all safety covers & shields are in place before turning on the machine. Never use a machine with a cover open, removed or damaged.

If there are any doubts about the safety of the machine or how it is going to be used, do not operate it & seek professional guidance.

▪ Before starting a cutting operation, assure all involved parts have been properly tightened.

▪ Allow sufficient time to complete the task; do not hurry. E.g., do not do a "quick cut" just before rushing out the door.

Do not place hands near cutter while the machine is operating.

Wait until the cutter has completely stopped turning before reaching in or touching the setup.

Never use a taper-mounted chuck without a drawbar if side forces are being applied. Side forces can cause a taper-mounted chuck to loosen & spin-off at dangerously high speeds causing injury. 

Always use a tang handle when filing on a turning lathe part. If it catches, it can jam the tang into/through your hand/eye. Wear eye protection.

▪ Do not reach over a machine while it is running.

▪ Do not operate any machinery while fatigued or under the influence of alcohol, medications, or other drugs.

▪ Do not leave the area while a machine is running unless it & the work area are setup to safely operate in that condition (e.g., a CNC machine that incorporates working fail-safe mechanisms).

Always disconnect & lockout the machine from its power source before performing any maintenance, repair, modification, or upgrade.

▪ Disconnect machinery from its power source when unused for extended time periods.

▪ Periodically test emergency stop circuits to assure they are functional.

▪ It is your responsibility to verify that all technical specifications of any given tool or project provides an integrated solution that will produce the desired results.

Mating mechanical parts sometimes require a mirror-image design.

▪ Pay close attention to units e.g., metric vs. imperial, cm vs. mm, C vs. F, or feet per second vs. furlongs per fortnight.

Bistable multivibrators are interesting devices.

▪ Never underestimate the pervasiveness of the Dunning-Kruger Effect, the scope of Asimov's Three Laws of Robotics, the influence of Cognitive Dissonance, & the efficacy of reverse psychology.

Your mileage may vary. Batteries not included. Objects in mirror are closer than they appear. The Answer to Life is 42. I'm a poet & don't know it. ;-)