Test and measurement tools Hartford uses to inspect bearings include Coordinate Measuring Machine, Laser Micrometer, Gauges, X-ray, Optical comparator, and Tensile tester.


	Custom Bearings ........................................ Custom Ball Bearings ........................................ Custom Caged Bearings ........................................ Bearing Assemblies ........................................

A2LA Member, the American Association for Laboratory Accreditation

Testing & Accreditation

The Hartford Quality Assurance System is threefold,
encompassing the integrity of the material, the tools used
in manufacturing, and the accuracy and repeatability of the
inspection and measurement instruments used to test and
verify specifications.

Some of the test and measurement tools we use are:

Coordinate Measuring Machine - provides Hartford
technicians with the ability to determine the geometrical
dimensions of bearings and balls, including those with
custom features.

Laser Micrometer - exceptionally accurate, non-contact
system, gives Hartford customers the advantages of absolute
measurement accuracy and highest reproducibility for a
wide dimensional range.

Gauges - circular geometry gage for roundness analysis;
also bore gauges for blind hole measurement, height
gauges, calipers.

Rockwell Hardness Tester

X-ray – for conformance-with-blueprint test, abrasion
and wear evaluations, failure analyses.

In addition, Hartford Technologies uses a high-speed, online X-ray
system to inspect bearings running single file on a belt to verify
proper ball count in each. Bearings containing too few or too
many balls are rejected with air blast for analysis.

Optical comparator –for precise comparisons to a
standard overlay profile or scale.

Tensile tester – determines ultimate tensile strength
and fatigue strength.

Other testing Hartford can provide includes:

ICP plasma spectrometer chemical analysis

Salt spray

Profilometer surface finish testing

Microstructure examination

Failure analysis

Noise testing

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Hartford Technologies products conform to these major
standard industrial specifications:

ANSI / AFBMA Standard 10 Metal Balls
ISO 3290 Rolling Bearings – Balls – Dimensions and Tolerances
DIN 5401 Finished Steel Balls for Rolling Bearings
ASTM F 2215
ASTM F2215
ASTM F2215-08
ASTM F 2215-08

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Why Hartford?

Hartford Technologies is a leading American manufacturer of custom ball & roller bearings and bearing assemblies, precision balls, and precision rollers, pins, and shafts with manufacturing facilities in the U.S. and China. We provide comprehensive value-added services, including application engineering and inventory management, to a customer base that spans automotive to medical, leisure products to agriculture.

Hartford customers include leading OEMs, and diverse, specialized manufacturers on four continents. Our commitment is to combine technical innovation with agility, responsiveness and institutional strength - strength that comes from a conservative management team, global manufacturing and logistics capability, and more than 80 years of leadership.