Summary for photo chemical milling Discussion
photo chemical milling of stainless steel is the topic of a brief inquiry from an Indian electrical-appliance maker that wants to diversify into photo chemical machining for stainless steel filter parts used in juicers. The poster does not ask a detailed technical question, but the context suggests they are seeking guidance on whether this process is suitable for their filter application. The only answer shown does not address the etching process itself; instead, the responder says that a shop producing substantial rejects is likely unsound and probably losing money, while a shop with rare rejects is probably doing fine. The practical takeaway is indirect: any photo chemical machining operation should be judged by its reject rate and overall process health, not just by the fact that it can etch stainless steel. No conflicting technical advice appears in the excerpt.
Q. DEAR SIR, WE ARE IN A BUSINESS OF ELECTRICAL APPLIANCES AND ITS PARTS SINCE 1958, IN India.WE ARE NOW DIVERSIFYING INTO PHOTO CHEMICAL MACHINING. THE MAIN PART TO BE ETCHED IS STAINLESS STEEL FILTER (FILE ATTACH) USED IN OUR JUICERS.

WE WOULD LIKE TO KNOW IN WHAT WAY YOU CAN HELP US IN SETTING UP THE INDUSTRY AND GIVING US THE TECHNICAL KNOW-HOW FOR ‘PHOTO CHEMICAL MACHINING’ OF STAINLESS STEEL. WITH BEST REGARDS, THANKING YOU.
MUKESH VERMA [surname deleted for privacy by Editor]
– New Delhi, India
2000
A. Save yourself a heaping pile of trouble!
Do not give in to the desire to do shortcuts. Adhere to your process. 99% of all problems can be traced back to someone not following the tried and true procedures. So many times I’ve listened to people complain of low yields just to hear them speak of how they “speeded up things”! They just don’t get it.
Jay Beauregard
– Plymouth, Massachusetts
Thanks for your posting. My own life experience is that any shop producing substantial rejects is unsound and probably losing money whereas if rejects are rare they are probably doing fine 🙂
Luck & Regards,

Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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