Trinel, Inc.

Bar Grinding Specialists
Turning, Straightening, Grinding and Polishing

5251 West 137th Street
Brook Park, Ohio 44142
Phone: (216) 265-9190 Fax: (216) 265-8630

Grinding and Polishing

Centerless Grindning
Trinel performs the method of centerless grinding called Thru-Feed. The part, bar or tube, passes in between the grinding and regulating wheels supported by a work rest guide. This produces a product that is round and straight.


Trinel can polish in three different ways with micro finishes to 8 rms and tolerances held to .0005 limit.

Chamfering / Cutting / Packaging

– Trinel can chamfer bars in various diameters up to 1.5 inches.
Saw Cutting
– All diameters cut to length with 1/8″ tolerance.
– Wood, paper, and cardboard options available.


Press and Rotary Straightening

Trinel can straighten all materials to our customer’s specification whether it is to industry standard (1/8″ to 5′) or to pumpshaft quality (.0015 per foot).


We can produce straightness and inspection reports for tight tolerance jobs.
*We specialize in pump shaft and boat shaft tolerances.


Production Bar Turning
– 1/2″ to 4 1/2″ Diameter

Trinel has recently purchased a new high production bar turner capable of turning diameters from 1/2″ – 2″.

We also have a No. 4 bar peeler capable of turning 1″ – 4 1/2″ diameters.

Are you ready to get started?

About Us

Trinel, Inc. was purchased in 1986 by the Martella family. It has been our family’s goal to provide our customers with a quality product that exceeds our customers’ requirements. Since 1986, our company has grown with the addition of new equipment and a commitment to quality. With the completion of our ISO 9002 Certification, we are able to provide our customers with a one stop facility, capable of performing all facets of the bar grinding industry, completely in-house.