How successful will you be machining say, aluminum or magnesium, or titanium in a world where no light oils are permitted?
How well will you gage parts for process control when (if) the acceptable fluid for cutting is 100SUS or heavier and its illegal to have mineral spirits in your shop?
A new rule being proposed by Los Angeles, California's South Coast Air Quality Management District originally sought to ban any "metalworking fluids" and "rust preventives" used in metalworking shops containing more than 25 g/liter of VOC's. the goal is to eliminate emission of roughly 1.9 tons per day of VOC's from Stationary sources (our shops!)
The rule proposed a new test method which established that light oils of 40 SUS and 60 SUS eluted VOC's above the 25 ppm threshold and so would be forbidden by the rule.
While many CNC's can be run on aqueous or synthetic fluids, much of the installed machine base in the precision machining industry is cam type automatics which require petroleum based oils. While the SCAQMD insists that its rule is not mandating the use of Aqueous fluids in our shops, the fact is that no light oils or petroleum based rust preventives that will comply with the rule have been identified by either the SCAQMD or the Oil Sales companies and refiners serving the West coast market.
At the latest public hearing, a refiner of base oils testified that because of the way that oils are blended, it was possible that even 100SUS oils might elute VOC's if that is how the particular batch ran at the refinery.
There are 3000 machinists jobs at stake in 111 shops in the affected 4 county area, who are vulnerable to this new rulemaking, using US census data for just Precision Machining NAICS 332721.
Petroleum based vanishing oils are forbidden by these regs, Say goodbye to the stampers.
We have yet to hear of a water based rust preventive that will work on carbon steel parts for 30 day or longer storage.
This rule could have a chilling effect on metalworking fluids nationwide if the manufacturers stop production for fear of prosecution should a non compliant product make it into the SCAQMD area.
Our comments have resulted in modifications to the timeline and the VOC limits, but our craft and livlihood is still at risk...
How successful will you be machining say, aluminum or magnesium, or titanium in a world where no light oils are permitted?
How well will you gage parts for process control when (if) the acceptable fluid for cutting is 100SUS or heavier and its illegal to have mineral spirits in your shop?
How will you deal with massive rejections when the parts you sent out are rejected for rust and you can't change the rust preventive according to these regulations?
Good Answers: