Coverage Check Tools

Coverage Checker
Peenscan® (Coverage Verification) Pens
Fluoro-Finder III Shot Peen Tracer

Coverage Checker by Toyo Seiko

Coverage Checker, manufactured by Toyo Seiko Co., Ltd., is revolutionizing the way shot peening operators check for coverage. The handheld measurement tool is easy to use yet it provides precise coverage measurement. Additional benefits include:
• User-friendly Windows XP operating system
• Simple touch screen operation
• Eliminates human error
• A quality optical system for optimal image analysis
• Coverage value is calculated with dedicated adjustable algorithms to correlate with visual observation
• Measures coverage in coil spring bores and other narrow areas
• Nozzle available for measurement in interior walls of holes
• Beginners can measure coverage as skillfully as experienced operators with the Coverage Checker

Download article on the Coverage Checker from The Shot Peener magazine, Winter, 2011

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Peenscan® (Coverage Verification) Pens*

These pens make the Peenscan process of measuring uniformity and extent of coverage as easy as using a magic marker. Peenscan Pens provide a convenient method for applying a thin coating of tracer fluid to very specific areas of a part without the need for masking. This has proven useful during initial engineering set-up of a part for shot peening as well as for monitoring critical areas (gear teeth, for example) during production shot peening. The Peenscan Pen is available with two fluorescent tracer fluids and selection of the appropriate fluid is dependent on the hardness of the metal and the intensity of the shot peening process: The Peenscan 220-2 pen should be used for softer base metals, softer shot and lower peening intensities. The 220-6 pen should be used for harder base metals, harder shot and higher peening intensities.

* The Peenscan process was developed by Metal Improvement Company and has been found to be superior to using a 10-power glass in many applications.

Fluoro-Finder III Shot Peen Tracer

A fluorescent tracer has a pigment that fluoresces under ultraviolet light making the determination of the degree or percentage of coverage quick, easy and foolproof. Use of this tracer eliminates the need for 200-percent coverage in order to be assured of complete peening. Distributed exclusively by Electronics, Incorporated, Fluoro-Finder III Shot Peen Tracer meets requirements of AMS-S-13165 and is approved by General Electric, Engine Division, GE Spec D50T59 and Class A Rev S3. Fluoro-Finder III is available in liquid form (with Methyl Ethyl Keytone) or powder form (customer must add Methyl Ethyl Keytone). Fluoro-Finder III is manufactured by American Gas & Chemical Co. Ltd.  (Liquid form available only in the United States)

Product Number	PN / List Price
Fluoro-Finder-III Liquid	P/N 999600
1 pint can (473.2ml)	$64.00*
Fluoro-Finder-III Liquid	P/N 999601
1 Carton (4 cans)	$222.00
* US sales have a minmum order of 2 cans, International sales have a minimum order of 1 Carton (4 cans).
Product Number	PN / List Price
Fluoro-Finder-III Powder	P/N 999602
1 pint can	$49.00 /each
4 (or more) cans	$40.00 /each

Manufacturer Disclaimer 
Fluoro-Finder-III Liquid MSDS
Fluoro-Finder-III Powder

Instructions for use

• Clean the parts to be peened. Remove all dirt, oil or residue.
• Prepare a control specimen of the actual workpiece material.
• Cover parts with Fluoro-Finder by brushing, dipping, or spraying (do not dilute). Allow a few moments for the coating to dry.
• Confirm full coating with black light.
• Shot peen control specimen using the correct intensity and parameters specified for complete coverage.
• Inspect with 10x magnifier to confirm proper coverage.
• Re-examine under black light. Full coverage is indicated by the degree of tracer removal at the point of full coverage shown under 10-30X visual examination.
• Establish coverage of actual production pieces using the same procedure for each part or on a statistical sampling basis. As the peening progresses, it removes the Fluoro-Finder film, causing the glow to fade.
• Compare the production tracer removal to the control specimen to assure proper peening coverage.
• Coverage: 1 pint will cover approximately 32 square feet or 3 square meters.

If the part is not properly pre-cleaned, tracer removal may be erratic.

Complete removal of tracer does not guarantee full or complete coverage. Coverage may be in excess of 100%. During process development, you should determine these two requirements:

• If there is a dent, then the tracer should be removed
• If the tracer is removed, there should be a dent 

Very low intensity peening may not remove the tracer although the proper dents have been produced. Very high intensity peening may allow low angle impacts (ricochet) to scrape away the tracer yet no proper dent is formed. You must correlate surface denting to tracer removal to validate this process.

Learn more about the importance of coverage to a quality shot peening program and many other shot peening fundamentals at an Electronics Inc. shot peening workshop.