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

Reducing Processing Steps for a High Luster Finish

Is there a process that can cutting process and get a little brighter microbrite finish on aluminum parts?

Ask an Expert Published: January 19, 2015

Recirculation of Mass Finishing Process Solution

How can we recirculate our process fluid in our vibratory machine without discharging to drain?

Ask an Expert Published: January 19, 2015

Internal Cross Hole Deburring

Is there a reasonably priced deburring system that can handle four-inch deep cross holes in aluminum aerospace machined parts?

Ask an Expert Published: January 19, 2015

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

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