HOME FAQs BOOKS JOBS: Help Wanted Suggestions you are here: Hotline/Forum => Letter 30014

Sawtooth trimmed edge from pickle line

++++

I have been trying to get rid of sawtooth on the trimmed edge off the pickle line but this has led to a belled edge on the OD of large coils. I am looking for any advice on what to try next.

Jim C [last name deleted for privacy by Editor]
Pickle line manager - East Chicago, Indiana, USA

++++

Edgetrimmimg on pickle lines can be very tricky. We have seen this sawtooth many times and it can also occur on slitters also. First you must get your operator to understand the slitting process. Then your knife and rubber combination must be correct on your edgetrimmer to get the proper cut and break. You do not want to run your uncoiler tension very high at all. This will cause the strip to pull tight and the knife to slip, which in turn cause the sawtooth. Try running your uncoiler break low and allow the slitter torque to run high enough to allow for a 3 to 4 foot loop after the edgetrimmer. The key is finding the right tension at the right speed.

Mike Sauls
- Ghent, KY, USA

ANSWER or FOLLOW UP POST an unrelated QUESTION HOT Topics

Disclaimer: It is 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; some names may be fictitious and some recommendations may be deliberately harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: