The traditional answer to the question "When is the best time to refinance?" is when interest rates fall 2 percent below your current mortgage interest rate. However, in recent years some experts have argued that refinancing may be appropriate with a smaller point spread. Some weight is often given to the length of time the owner anticipates holding on to the property. If the owner expects to keep the property for at least three or four years, then refinancing may be worthwhile. While refinancing can involve upfront costs, in many cases it is possible to roll the costs of the refinancing into the new note and still reduce the amount of the monthly payment
When filing in a lathe, don’t hold the file rigid, but use a slight gliding motion. This will help the file clear itself and also prevent ridges. When filing metal, vary the speed according to metal. Generally use 150 surface feet per minute for cast iron; 175 for annealed tool steel; 350 for machinery steel, and 500 for soft yellow brass. Also, don’t run your hand over the work. Resulting oil and moisture will make it harder for the file to take hold.