Dearborn Inc.
Contact: Steve Fleshman
678 Front St
Berea, OH 44017
U.S.
Phone: 440-234-1353
Fax: 440-234-3150
Dearborn, Inc. founded in 1967, is a continuation of Howard Dearborn, Inc., founded in 1947 by Howard K. Dearborn and has led the way in providing innovative solutions to difficult internal machining problems, starting with the development of deep hole drilled components for the first U.S. Navy nuclear submarines. This technology has since led to the development of machinery, built in-house by Dearborn Inc., and many new manufacturing processes that have been applied to commercial reactor applications, aerospace and other industries.
Over the past 50 years, Dearborn, Inc. has evolved from providing precision deep hole drilling services, to manufacturing sophisticated finished-machined parts. We provide these specialized parts to numerous industries including; Aerospace, Nuclear, Paper, Plastics, Medical and Steel. Dearborn's ability to manufacture components beyond standard practices has made us a valuable source for many of the Nation's largest companies.
As a result we have retained a high percentage of repeat customers in many diverse industries. Within our modern facility, you'll find state-of-the-art equipment and a talented, well-trained workforce that is eager to solve your technical problems. From initial planning to final shipment, we do everything possible to provide you with the quality you deserve.
Precision Deep Hole drilling is the cornerstone of Dearborn's business. Our reputation for the successful deep hole drilling of ferrous, non-ferrous and machineable space-age metals since 1947 is unprecedented. Dearborn can drill holes from .073 Dia to 2.00 Dia. and up to 32' deep, depending on the hole size. We are very familiar with drilling difficult materials, such as Inconel, Titanium, Molybdenum, Heat Treated Stainless, as well as less difficult materials including Plastic, Aluminum and Brass. Our ability to drill ultra-deep holes, up to 600 times the diameter, and maintain consistent wall thickness is what sets us apart from our competition.
Trepanning is a machining method of producing larger diameter, deep drilled holes which can be more cost effective than typical gundrilling techniques. It is best described as core drilling. Unlike gundrilling, Trepanning leaves a core from the center of the bar instead of turning it all into chips. In some of the more expensive alloys, this bar can be reused, thus saving valuable material costs.
When your parts call for critical ID tolerances or superior microfinish requirements, Dearborn Inc. has the capabilities. Dearborn can hone bores from as small as .156 Dia up to 8.0 Dia. and up to 20' deep depending on the hole size. Microfinishes from 63 RMS for most applications to 8 RMS, (such as Pultrusion dies), can be provided as each application requires. Dearborn has also developed processes to hone very small diameters, as small as .156 Dia up to 36" long on thru bores. Our ability to hone these very small, deep diameters in difficult-to-machine materials is a service upon which our customers rely - and one that Dearborn consistently provides.
We also can provide CNC Turning and CNC Milling services. From internal threads to external threads, counterbores, internal chamfers, milled slots, etc. we have the ability to produce those features accurately and efficiently. By being able to provide the CNC Machining in addition to the deep hole drilling, Dearborn, Inc. is now able to provide these services in house, which in the past was performed by outside vendors.
Dearborn, Inc. is able to drill a sequence of holes holding a very tight locational tolerance and maintaining a tight location through the entire part, with our Borecentric© process. This type of service is used extensively in the Roll industry and the Steel industry where cooling or heating holes must be located accurately and consistently.
Honing does not improve wall thickness variation, concentricity or ID straightness. Only size and finish are changed. Our process allows us to provide three types of tubing with different characteristics, depending on the end use. This cost effective method of improving input tube hollows or mill produced tubing can represent considerable cost savings when working with expensive nickel or titanium alloys. If your material of choice is not available in tubing, or if you cannot find the desired wall thickness, we can start with barstock and machine a precision tube to your specifications. Why settle for less, when we can provide the material, size, straightness and wall thickness that you need?
Type 1 is tubing which is bored through the entire length in a straight line, and has the bore concentric to the OD at both ends. (the OD would still have its original bend or bow).
Type 2 is tubing which is bored through its entire length with the bore being concentric to the OD throughout the tube. This type does not necessarily have a straight bore, but does have a uniform wall thickness, and may have a bend or bow throughout its length.
Type 3 is tubing which is bored in a straight line, concentric to the OD at the ends, and having the OD turned or ground in a straight line, which is concentric to the ID.
Dearborn, Inc. began as a gundrilling company, and everything that we do today has grown out of our ability to drill straight holes.
The variety of "Dearborn designed" gundrilling machines combined with over 50 years of experience, allows us to drill long parts or unusual shapes, and maintain exceptional true position and wall variation tolerances.
In addition to deep hole drilling, boring, and the special machining processes listed in this website, we are very proficient at managing outside vendor services including; heat treating, coatings, shotpeening, splining, etc.
Our established relationship with experts in many fields allows us to better serve our customers.
Our willingness to reach beyond known limits has made us a valuable resource for many of the nation's largest companies.
Precision straightening is a service we can also provide. Typically we can handle parts up to 3" diameter in-house. If the material is larger than 3" diameter, we have alternate sources to handle those requirements.
Material used
Titanium
Inconel
Stainless
Beryllium
Aluminum
17-4 PH
Hastalloys
Monels
Molybdenum
Additional Services
Centerless Grinding
Chrome Plating
Shot Peening
Anodizing
Passivation
Dye Penetrant Inspection
Laser Etching
Heat Treating
Tiodizing
Splining
Sawing
Cadmium Plating
Quality in service, quality in manufacturing and quality in finished products. These are what we believe in. Our Quality program meets several different Mil-Specs. From the initial planning to the final shipment, we do everything possible to provide you, our customer, with the quality you need and expect.
Our quality program meets the requirements of MIL-1-45208A, ISR-1 and MIL-STD-45662.
