Peterson Spring
Welcome to Peterson Spring
PETERSON RINGS BROCHURE
PAC
RETAINING RINGS
www.pspring.com
Retaining Rings 
Retaining Rings 
Retaining Rings 
Retaining Rings   
Retaining Rings
PAC

PETERSON SPRING
A Peterson American Company
Snap Rings  Transmission Rings  Retaining Rings 
Wave Rings  Peterson Spring  Transmission Rings 

Contact either of these locations for large order contracts or short run orders.
PETERSON SPRING
Sales & Engineering
21200 Telegraph Road
Southfield, MI 48083
Phone: (248) 799-5400
Fax: (248) 357-5874
PETERSON SPRING
Ring Manufacturing & Engineering
1625 Commerce Road
Holland, OH  43528
Phone: (419) 867-8711
Fax: (419) 867-8715
PETERSON SPRING
has over 50 years of experience in the design and manufacture of coiled retaining rings.  Let us put our expertise to work for you.
THE ADVANTAGES
Coiled PAC retaining rings have obvious cost advantages over stamped rings: they avoid the tremendous amount of blanked scrap that stamped rings produce, and require neither expensive tooling or dies nor costly hardening processes.  We can manufacture rings with a number of gap configurations to assist with assembly, disassembly, and identification.  In addition, we can provide ground surfaces and variety of notches or holes at the ring gap.
ENGINEERING
To meet your requirements, a resident engineer at each PAC retaining ring manufacturing location can provide engineering, technical, and design assistance for the development of special section coiled retaining rings.  Also, a corporate-based staff of engineers and metallurgists are at your disposal for design, value and application engineering, as well as laboratory analysis.
MATERIALS
Coiled retaining rings can be produced in many different materials, such as stainless, chrome silicon, and special nickel alloy as well as the standard grades of medium to high carbon steel.  Starting from round wire, PAC ring plants shape their own wire ranging from 0.36 mm to 12.7 mm (.014' to .5') square.  Rolling mills and shaping heads are used to form the precision toleranced materials required for quality finished rings.
MANUFACTURING
PAC retaining rings are produced at four of our locations in North America.  Specialized equipment, much of our own design, contributes to maximum efficiency and cost-effective manufacturing.  Our skilled operators produce over 100,000,000 coiled retaining rings a year on modern equipment.  For high volume production runs, our product capabilities cover parts with inner diameters ranging from 12.7 mm to 305 mm (.50' to 12.0').  We can also make special production runs, or small lot quantities of parts with inner diameters ranging from 1.57 mm to 1830 mm (.062' to 72.0').
QUALITY ASSURANCE
Optimum product quality and reliability are inherent in PAC retaining rings.  Quality control begins with the incoming inspection of raw material and proceeds with the use of statistical process controls during manufacturing.   Continuous monitoring, both in the laboratory and on the production line, assures our commitment to achieve and maintain world-class quality.
 
For a FREE Technical Manual with retaining ring design data and engineering specifications, call (248) 799-5400.
PAC
PETERSON SPRING
A Peterson American Company
Wave Springs
 Wave Springs 
Transmission Rings 
Wave Rings
Wave Rings 
Retaining Rings
Retaining rings 
Snap Rings  Lock Rings
Snap Rings
Bearing Rings
Retaining Rings
Retaining Rings Technical Manual 
THE COMPANY THE PROCESS
In 1914, a Norwegian immigrant named August Christian Peterson and his son, Alfred, founded the first mechanical spring factory in Detroit.  Today Peterson Spring is an international group of companies manufacturing springs, rings, multi-side clips and wire forms, hose clamps, and stampings. Spring Wire Roll -1-
Certified raw material is received in coils of round spring wire.  These high carbon steel and alloy wires will be custom shaped to optimize the final cross sections required for each retaining ring application.
-2-
In a highly automated process, a keystone (trapezoidal) cross section is achieved by drawing the material through wire polishers and multi-staged rolling and shaping mills.
Transmission Ring Rolling Mill  Retaining Ring Manufacturing Machine 3-3
Keystone cross sections are carefully engineered and controlled to insure precision tolerances in the final ring forming operations.
-4-
Keystone wire is fed through the ring coiling operation to form the proper finished ring diameter and resulting rectangular cross section.  The coiled ring is then cut, giving a gap of the specified profile and width with minimal material waste.
Transmission Rings Manufacturing  Retaining Ring Stress Relief -5-
Rings are then stress relieved at appropriate time and temperature settings to insure optimum performance characteristics and dimensional stability.
-6-
Secondary processing is sometimes necessary for special applications.  Shown is a double disc grinding operation used for rings requiring specialized incremental thickness tolerances in selective fit applications.
Ring Grinding Operation  Quality laboratory  -7-
Each plant is staffed with its own quality department to insure the conformance of incoming and outgoing materials as well as in-house processes.  PAC's metallurgical lab, located at corporate headquarters in Southfield, Michigan, is also available for more in-depth or specialized analysis as well as research and development activities.
       
PAC
PETERSON SPRING
A Peterson American Company