Western Gage

At Western, we focus on air and electronic gages that with a minimum amount of operator skill provide fast-accurate and cost effective measurements of parts in production shop floor environments.

For fast-accurate measurement of Internal and External Diameters consider using one of our dimensional air gages. We’ve designed and manufactured dimensional air gages for over 40 years and know what works well and what doesn’t. Air gage ranges are limited so they’re not for every application; but for highly precise parts there is nothing better.

Besides checking I.D.’s and O.D.’s, we have proven air gage designs for checking taper angle, straightness of bores, concentricity, thickness, perpendicularity, center distance and parallelism. Fabricated in Western’s gage manufacturing shop, they’re fast-accurate and much less expensive than using coordinate measuring machines, roundness test tables, or surface profilometers to check these kinds of features. Does it make sense to employ expensive pieces of capital equipment when a fast-accurate custom built gage will do the job?

Readouts for fast-accurate gages are where we excel with our microprocessor based instruments. MilliCheck readouts with high resolution LCD displays are ideal replacements for single channel mechanical air gage instruments. Versatile Micro II readouts have both bargraph and digital displays, incorporate RS-232 serial outputs, and can handle up to four inputs. More complex gaging applications utilize Western’s model AEK II air-electric converters coupled to PC computer or GageChek displays.

Not all workpiece features are best measured with air gage sensors; hard contact gages are better for rough surface finishes, and for applications requiring extended gaging ranges. For these applications, we use our electromagnetic inductive probes coupled with LVDT electronic modules in Micro II readouts.

Of course, dimensional gages are no better than the masters used in their calibration. At Western, we operate our own gage finishing and calibrating laboratory where ANSI/ASME standard and custom setting masters are lapped and calibrated with NIST traceable standards under highly precise environmental controls.

We believe that fast-accurate measurement is a key part of precision manufacturing processes. Our focus is to provide value to our customers by improving this facet of their operations.
Dimensional air gages to assure the quality of your precision parts since 1968.


Marposs Corporation, headquartered in Auburn Hills, Michigan USA, is part of the global group of Marposs companies, whose business began in 1952 and who provides uniform worldwide support of all its products and applications. From its origins in White Plains, New York, in 1963, Marposs Corp. has become one of the industry’s leading suppliers of measurement and inspection devices and process control systems to end-user manufacturers, machine tool builders and automation suppliers in the United States and Canada.

Marposs Corp. employs approximately 135 skilled professionals. In addition to sales, service and training, Marposs Corp. also provides engineering, manufacturing, project management and comprehensive system integration services. Strategic placement of Marposs sales engineering and service teams throughout the United States and Canada provides its customers with a local support team. These teams are backed by resources located within its corporate headquarters and Toronto, Ontario regional office. Additionally, Marposs Corp. has an extensive distribution network staffed with trained sales personnel.

With a keen focus on quality, continuous improvement and cost containment, Marposs Corp. has achieved numerous accreditations including ISO 9001, ISO 14001, and Ford QOS. The company also received the Ford Q1 Award and in 2005 the Global Supplier Award for Manufacturing Goods & Services from DaimlerChrysler AG.

The mission of Marposs Corp. is to provide the best solution possible for all applications requiring measurement, control and data management at each stage of the production process, and to deliver and support these solutions to its customers wherever they locate worldwide. Performance and uniformity of all Marposs core products and components are guaranteed by the quality systems in place in our main R&D and manufacturing facility in Bologna, Italy.

In the drive for “zero defects” manufacturing, Marposs Corp. recognizes that it is no longer acceptable to rely only on measuring tools designed for the laboratory. Providing the capability to accurately measure and document quality at the point of application has become a necessity. That is why Marposs Corp. supplies gauges and other measurement and control devices that can function and survive with repeated daily use on the plant floor.

Because Marposs Corp. recognizes that applying a “one-size-fits-all” strategy may end up compromising the desired results, the company has expanded its range of measurement and control products to include systems that incorporate optical, air, or eddy current technology, in addition to its traditional contact electronic technology. The company has also developed gauging solutions for assembly, as well as systems for testing leakage of parts. At the other end of the spectrum, Marposs has introduced a full line of functional gauges, masters, calipers and go/no go tools.

Mahr Federal

In today’s increasingly competitive environment, the ability to monitor and control variations in the manufacturing process is crucial. Established over 85 years ago in Providence, Rhode Island, Mahr Federal Inc. is recognized worldwide for expertise in providing dimensional measurement solutions and meeting the measurement needs of precision manufacturers in a variety of industries such as automotive, defense, aerospace, job shops, machinery, bearings, pumps, engines, computers, can manufacture, plastics and medical devices.

Mahr Federal employs over 300 people; measurement professionals, who have dedicated themselves to developing and producing innovative and imaginative dimensional gaging instruments to improve measuring efficiency. Skilled applications engineers in Providence draw upon experience in identifying and meeting customers’ measurement requirements. We have delivered the right answers to hundreds of thousands of satisfied customers around the world — whether the solution be as simple as a dial indicator, one of a selection of hundreds of hand-held indicator gages, a digital readout air fork for outside diameter measurements, high precision form or surface finish analysis instruments or a specially designed gage for such applications as high-speed measuring, sorting and classifying of wrist pins. Our laboratory gages for calibrating gage blocks, master rings and discs have set a standard of performance for millionths accuracy size determination, and are clearly in a class by themselves as basic instruments for the surveillance of primary and secondary standards.

Customer Resource Centers in Providence, Cincinnati and Los Angeles form the core of our extensive network of sales personnel and distributors supporting customers in the United States and Canada. Mahr Corp. de serves our costumers in Mexico.

Mahr Federal supports its customers with factory repair and calibration services and responsive field service. The company maintains a metrology laboratory in Providence that is ranked as one of the world’s finest. This highly controlled laboratory environment assures protection against the effects of vibration, temperature and humidity variations. Mahr Federal’s calibration system is certified to ISO-9001 and ISO-17025. All procedures for measuring and reporting size are equivalent to those of the U.S. National Institute of Standards and Technology (NIST) and conform to U.S. Specification GGG-G-15C.