Letter 6053

Shining finish on stainless steel bolts/screws 

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We are manufacturers of Stainless Steel Bolts, screws etc.. by cold-forging & thread rolling process. After the goods are ready we clean the goods by de-greasing. Then we put the goods in polishing drums (hex barrels) along with dry saw-dust, & the drum rotates for some time with the goods inside for getting the shiny finish. We wish to improve the shine on the product. We need a shining finish on the SS Bolts/screws etc.. The process should not be very expensive as the goods face stiff competition. Do we need to change the process or any additions/modifications need to be done. We shall be obliged for the guidance.

Thanking You,

Pravin I. Kapoor
steel industry - Mumbai (India)

There are a couple of things you can do to improve your products appearance. Probably the fastest and cheapest way is to add a liquid polishing rough to your dry organic materials. A common general purpose rouge is Alum oxide( white in color), but the stainless steel might look better using chromium oxide (green in color). Equipment might also have something to do with your finsh also.

AF Kenton Nova Finishing Systems Inc. Huntingdon Valley, PA

Dear Sir:

Electropolishing is the best method of improving the appearance and performance of stainless steel screws and bolts. We would be willing to demonstrate the results on your parts if you would like to send us some samples. We would suggest a relatively small test in the beginning to establish the finish, then a larger scale test to establish the economics.

You can find our company in the suppliers directory on this web site. There should also be a hyperlink to our own site.

Ed Bayha Metal Coating Process Corporation Charlotte, North Carolina, USA

Sir,

We are manufacturers of stainless steel cutlery & flatware items. Presently we are using the traditional buffing process for polishing our product. But it takes lot of time as our production has increased a lot. So we have to give it to outside sources and this is proving to be costly.

We have heard about some drum process in which the material is put into the drum and it is rotated for some time. Well I've even heard about electropolishing of stainless steel. Now out of both which one to use and how is not known

We are wishing to put up a electropolishing plant in our factory, but we are not sure about its costing and its finish. How to put up a plant is also not known and even what solution to use or for how much time.

If you could guide us in these regards it would be kind of you.

Yours sincerely,

Ambrish Vadodaria
- Ahmedabad, Gujarat, India