-- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
on this site
current topics
topic 12131

Punch Polishing


We manufacture punches for the metal stamping industry and have a job that requires a 16 rms polished finish. If we do no have a gauge to check this with, how would you compare this finish to a common part. eg: the same as a valve stem in a car? smooth as glass? We usually polish with a buffing wheel but are never sure what is expected for different rms finishes.


Ken Weiler
precision products - Waterloo, Ontario, Canada



Not sure how to answer your question. A 16 RMS is not a very fine surface finish. It is a good quality finish for secondary chemical plating processes. A profilometer will instantly tell you your RMS. Comparables are first, normal mill steel finish is 35 RMS, if refined or worked in a mass finishing system using a coarse ceramic preformed media shape, about the best results would be about 22 RMS. Using a fine to medium composition from coarse, you may achieve close to a 16 RMS. You may require a 3 step process. Depending on the size and aggressiveness of the deburring system this can take anywhere from about 30 min./cycle to 4 hours. There are a lot of variables here.

tony kenton
AF Kenton
Hatboro, Pennsylvania

If you have a question in mind which seems off topic, please Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.