| |
Letter 35007
Polishing of surgical instruments
made out of SS410
+++++
Dear sir,
We manufacture surgical instruments. These instruments are made out
of SS410 and SS420 grade stainless steel.
Now we polish it manually using buffing wheel and emery powder
etc.
But in this process polishing is not even. Can you suggest the good
method of polishing.
Pl reply
With regards
Johny T [name deleted for privacy]
manufacturing of surgical instruments - Chalakudy, Trichur Dt.,
Kerala state,India
+++++
For uniform surface finishes you can't beat a mass finishing
machine systems. We do and recommend a lot of dry organic processes
for the medical industry.
|
+++++
Dear Gentleman,
To produce the uniform finish on SS, you are advice to use
two step process
1. Non-Electrolytic chemical polishing
2. General buffing, what you are doing now.
Navin M 
- New Delhi
+++++
Hello
We are one of the manufacturers of coated abrasives.
We recommend using Abrasive Flap Wheels for polishing of
surgical instruments.
The reason that we suggest using a flap wheel is that is
offers a uniform finish on the product, also the current
method in use is very crude for a surgical instrument
manufacturing industry.
One crucial draw back in the current method is that the
emery powder available in INDIA has a very high level of
iron content, now when using such a powder for polishing,
the remains of the powder get embedded in the products,
resulting in rusting of the product after a few
months.
Regards,
Nitesh K 
- Mumbai, INDIA
|
|
|
+++++
GentleMen,
I recommend either electropolishing or satin finish using fluorides
(electro etch). But I do not know whether surgical equipments can be
polished using the above methods. Please verify.
with regards,
Kandaswamy R [name deleted for privacy]
- Coimbatore, Tamil Nadu, INDIA
+++++
We can suggest electropolishing stainless steel 410 and 420 in
saline solution. Not only you achieve the bright finish and
passivated surface for 410 stainless steel (matte finish and
passivated surface for 420 stainless steel due to high carbon
content), but you will eliminate surface contamination by abrasives,
additional cleaning and passivation steps. Also electrolyte is safe
for the environment and workers. No acid spills around the shop
anymore. This methods is already installed in BAMA shop in Milan,
Italy, where surgical instruments are routinely electropolished.
+++++
Can you suggest the good quality emery powder and flap
wheels?
Is there any type of coating to prevent rusting after polishing and
buffing?
With best regards
Johny T [name deleted for privacy]
- Trichur Dt.Kerala State

Dear Reader, please --
- Answer or follow-up on this
subject (in non-commercial
fashion).
-
- Post a new
question or inquiry on a
different subject.
-
- View
the most current finishing questions and RFQs
-
- This is a monitored
forum. If you spot broken links or obsolete info, please
advise!
 |