Home made penetrating oil (source; Hydrovane)
Penetrating Oils –Machinist’s Workshop magazine recently published some information on various penetrating oils that I found very interesting. Some of you might appreciate this. The magazine reports they tested penetrates for break out torque on rusted nuts. They are below, as forwarded by an ex-student and professional machinist. They arranged a subjective test of all the popular penetrates with the control being the torque required to remove the nut from a “scientifically rusted” environment.
Penetrating oils ……….. Average torque load to loosen:
- No Oil used 516 pounds
- WD-40 238 pounds
- PB Blaster 214 pounds
- Liquid Wrench 127 pounds
- Kano Kroil 106 pounds
- ATF*-Acetone mix 53 pounds
* The ATF-Acetone mix is a “home brew” mix of 50 – 50 automatic transmission fluid and acetone. Note this “home brew” released bolts better than any commercial product in this one particular test. Our local machinist group mixed up a batch and we all now use it with equally good results. Note also that “Liquid Wrench” is almost as good as “Kroil” for about 20% of the price. Steve from Godwin-Singer says that ATF-Acetone mix is best, but you can also use ATF and lacquer thinner in a 50-50 mix.
Releasing pressure of a primus stove whilst underway
For the few of us that still use a paraffin stove to cook, when gimbald and releasing the pressure after cooking, paraffin can spray out of the pressure release valve, however, if you use the gimbals to tip the paraffin away from the valve the air can be released without the paraffin shower. Credit to this tip is given to the crew !