halfBosch Half Sheet Orbital Finishing Sander

By Robert Robillard on Tool Reviews

Bosch Half Sheet Orbital Finishing Sander OS50VC ReviewBosch 1/2 Sheet Orbital Finishing SanderBosch 1/2 Sheet Orbital Finishing Sander

The folks at Bosch recently sent us their Bosch Half Sheet Orbital Finishing Sander to review and evaluate.

This tool is a bit niche but the perfect sander for woodworkers, furniture  makers, mill-shops and carpenter folks like me who build wainscoting or  custom cabinetry, bookcases and mantles.

This tool has a rectangular flat sheet, pad design and a removable auxiliary handle giving users the ability to sand in corners and tight spaces.

Because it has a specific application it sat in our shop for a bit until we had a flat panel wainscoting project to test it on.

First Impression

The OS50VC  sander weighs 6-pounds and is very well balanced.  The pad is 4-1/2 x 9-inches and the perfect size to secure a half sheet of sandpaper to.  Attaching sandpaper to this sander is a breeze.

The handle has a comfortable, thick rubber over mold and are well spaced.  I immediately noticed the dust collection canister as well as the 13 foot cord.  Nice touch!


Using The Bosch  Orbital Finishing Sander

There are basically four important things you should know about this sander, they are:

  • Vibration Control
  • Sandpaper Attachment
  • Dust Collection
  • Power and Control

Vibration Control:

Bosch’s approach to vibration control is designed around a foam block suspension system.   Eight foam heavy-duty blocks are mounted around and isolate the grip area of the tool separating it from the motor and gear section.  This separation keeps vibration to a minimum which is always appreciated on long sanding applications.

I’ve experienced this vibrations suspension system when reviewing the Bosch ROS65VC sander.  It’s hard to believe that foam blocks could be strong enough and effective at reducing vibration but it really works well.

The best way I can explain this is to relate the vibration control to noise control principles.  When thinking about reducing noise inside a home you need to consider reverberation reduction.

Reverberation is the echo that sound creates as it bounces off of surfaces in a room rather than being absorbed.   In a similar fashion the sander’s foam blocks separate these vibrations before they are absorbed through the users hand, elbow and shoulders. 

It’s a very impressive system and one that I found to work well!

Sandpaper Attachment:

Bosch uses what they call their SheetLoc clamping system.  This system works off of two spring loaded levers that automatically tension the sanding paper as it is being clamped to ensure that it is held flat and taut.

The sander pad is a micro-cellular material that conforms to different contours.  The pad accepts regular pad sanding paper, sand paper cut in half as well as adhesive backed paper.  For sand paper that is not already punched Bosch provides an hold punching jig that the sander indexes into and automatically aligns and punches the dist collections holes.

Dust Collection:

The Bosch 1/2 Sheet Orbital Finishing Sander has two methods of collecting dust.   The best and my preferred method of dust extraction is an attachment that connects to a dust collector vacuum. 

A translucent canister with a paper micro-filter and cap also comes with the sander.   I was impressed at how effective this canister worked as well as how quickly and easily empty the canister was. 

Power and Control:

The sanders 3.4 amp motor is powerful enough to provide a fast removal rate while sanding.  A variable speed dial and trigger lock on button give the user additional flexibility and control.  I always lock on my sanders and search for a comfortable grip, usually away from the trigger, on large sanding projects.

Overall Impression:

We can’t say enough about this sander and its little brother the ROS65VC random orbital version.  They do exactly what they advertise! 

How Much and Where To Buy?

The Bosch 1/2 Sheet Orbital Finishing Sander can be purchased online here Bosch-OS50VC-120-Volt-Finishing-Vibration for approximately               $ 379.00



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About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzz As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising the bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

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