Mechanical Finishing Clinic
Pat Wenino

Pat Wenino

Mechanical Finishing columnist Pat Wenino is a veteran of more than 30 years in the industry and author of the textbook Metal and Composite Finishing. He answers your questions on all things Mass and Mechanical finishing.

Got a question or comment for Pat? Send him an email.

The latest from the Mechanical Finishing Clinic

Aluminum Burnishing/Brightening

How can we eliminate damage to aluminum parts finished in a vibratory machine with steel ball-cone media?

Ask an Expert Published: April 02, 2014

Adjustments for Bowl Vibratory Machines

How do we adjust our self-unload bowl vibratory machines to increase their energy and get them to unload faster?

Ask an Expert Published: March 26, 2014

High-Energy Mass Finishing

A centrifugal-disc machine will run large quantities of smaller and tougher parts, give them a low-Ra finish in a relatively short cycle time, and automatically unload the parts and separate them from the media.

Ask an Expert Published: March 19, 2014

Stainless Steel Deburring

What is a #8 stainless finish, and can we use vibratory methods for our requirements?

Ask an Expert Published: December 31, 2013

Chemical Accelerator Mass Finishing

Can you recommend a vibratory or mass finishing process for smoothing grinding lines on hardened steel gears?

Ask an Expert Published: December 24, 2013

Pre-Plate Finishing

We chrome plate a small aluminum fitting, first using a vibratory process on the part to produce a competitive, refined, pre-plate finish. This often creates small part dings and surface orange peel that only show up after plating. What causes the surface damage, and how can we test for part damage on the hard-to-see-through matte finish prior to plating to avoid an expensive strip and re-plate process?

Ask an Expert Published: September 30, 2013

High-Energy Mass Finishing

We produce two parts that cannot be deburred in our bowl vibratory machine. Is there another finishing system that would deburr these parts?

Ask an Expert Published: September 26, 2013

Vibratory Residue Problems

How can we remove the white residue left on parts after vibratory finishing without an expensive, additional cleaning/drying operation after finishing?

Ask an Expert Published: July 01, 2013

Pre-Anodize Vibratory Finishing

What vibratory media would provide a good visual finish on clear and black anodized aluminum parts?

Ask an Expert Published: July 01, 2013

Media Lodging

Ceramic media chips and small media are lodging in the parts during our vibratory process. How can we prevent or eliminate these problems?

Ask an Expert Published: March 25, 2013

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