Steel Bolster Plates | Precision Grinding, Inc.

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Steel Bolster Plates

Precision Grinding, Inc. specializes in flame cutting, Blanchard grinding and surface grinding and machining steel plate products including steel bolster plates.

Machined and Ground Steel Bolster Plates

Machined and Ground Bolster Plate

Cutting, Grinding, Machining

Bolster plates normally have t-slots or scribed lines running in parallel the length of the bolster plate. There are many variations in size, dimension, and functionality for steel bolster plates. Engineers and tool makers custom design bolsters to meet specific applications.

These plates are normally thicker than 2″. We flame cut, then stress relieve A36 structural plate in order to improve the grinding and machining processes. Though, often times specifications suggest a  Blanchard ground to ± 0.005″ tolerance thickness and a ± 0.005 – 0.010″ parallelism tolerance, relaxing tolerance levels may save time and money. Of course, critical, close tolerances can also be achieved.

T-Slotted Steel Bolster Plates Large

Large Steel Bolster Plate

Machining Bolster Plate

Machining Bolster Plate


This custom t-slotted plate is 6′ x 4′ large standing on one of our Mill Tables.

Bolster Plate

Bolster Plate

CNC Vertical Machining Centers

Our precision machine shop runs four CNC Vertical Machining Centers.  Maximum capacity for our new Johnford Vertical Bridge Mill is 42” h x 110” wide x 162” long at 26,500 lbs.  Our Takumi CNC Machine is 31″h x 78″ x 122″ at 22,000 lbs. Our CNC machinists average over 5 years experience at Precision Grinding.   We have three CAD Programming specialists, and full CNC operations. Many of our veteran machinists have been working with Precision Grinding for over 20 years.

Most of these plates require a high-level of expertise when it comes to finishing reamed holes, cutting grooves, beveling or chamfering edges, and end milling or face milling. We can also provide a detailed inspection report using our Renishaw probing system.  In addition, our Takumi is also capable of Horizontal milling edges upon the same piece with the installation of the 90° right-angle head.

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