benchmark

Item 1 -- Basic Benchmark Gauge Set (Item 1M for metric units)

Benchmark gauges are specifically designed for conducting on-line checks of turbomachinery alignment. The basic benchmark gauge set consists of a telescoping column with an electronic digital readout, six extensions, a 25" (625mm) standard, and an inclinometer. The digital readout uses a single 1.5 volt size SR44 battery (type and size commonly used in electronic calculators and cameras). Expected battery life is 2 years. A spare battery is furnished.

The benchmark gauge itself is spring-loaded with spherical seats at either end to match the spherical benchmarks that are mounted on the equipment. The gauge is self-supporting when placed between pairs of benchmarks. The range of the benchmark gauge, without extensions, is 25" to 30" (625mm to 750mm).

The six extensions give the tool a total range of 25" to 60" (625mm to 1500mm) in increments of 0.001" (0.01mm). The standard and the extensions are constructed of Invar. The low coefficient of thermal expansion of this material greatly reduces measurement errors resulting from thermal expansion of the tool itself. The standard and the extensions are manufactured to an overall accuracy of 0.001" (0.025mm) in length.

Exposed portions of the tool, including spherical seats, are stainless steel. The gauge set is packaged in a durable ABS plastic case. Overall dimensions 38" x 14" x 5" (965mm x 355mm x 127mm), weight 28 pounds (13 kg).

Item 2 -- Extension Set (Item 2M for metric units)

Set of 4 extensions for item 1 covering a measurement range of 60" to 80" (1500mm to 2000mm). Furnished in a tubular plastic case. 16 pounds (7 kg).

Item 5 -- Short Range Benchmark Gauge Set (Item 5M for metric units)

For conducting hot alignment checks on smaller equipment. Same construction as item 1, but with a reduced measuring range. The range of the benchmark gauge is 13" to 16" (325mm to 400mm). The six extensions give the tool a total range of 13" to 34" (325mm to 850mm). Case dimensions 24" x 14" x 5" (610mm x 355mm x 127mm). 20 pounds (9 kg).

Item 6 -- Extension Set (Item 6M for metric units)

Set of 6 extensions for item 5 covering a measurement range of 34" to 52" (850mm to 1300mm). Furnished in a tubular plastic case. 20 pounds (9 kg).

	Item 10 -- Covered Benchmark This covered benchmark is recommended for general turbomachinery work. It is of one-piece construction of type 18-8 stainless steel. It is furnished with a 3/8-16 NC carbon steel stud for mounting directly on a 3/8-16 NC male thread, or the base of the benchmark may be welded directly to the equipment. If threaded fasteners are used, it is recommended that the assembly be epoxied in place. The protective cover is made of Delrin plastic, which offers good mechanical properties and excellent corrosion resistance. To mount this benchmark in concrete, use item 20. Properly mounted, this protected stainless steel benchmark affords alignment reference for the life of the equipment.
	Item 13 -- Threaded Benchmark This simple benchmark is useful for a wide range of non-critical applications which do not require the long term protection afforded with item 10. It is of one piece construction of 18-8 stainless steel, and is screwed into a tapped hole and secured with a locknut. The stainless steel locknut is furnished.
	Item 14 -- Weld-on Benchmark Similar to item 13, but with a flat, non-threaded base. Weld directly to the equipment. Same 95 degree useful limits as other benchmarks. Base is 3/4" diameter. Base to centerline of the ball is 3/4".
	Item 15 -- Masonry Benchmark Similar to item 13, but with a 9/16" diameter base which can be epoxied directly into a 5/8" diameter by 1-1/4" deep hole. Especially useful for non-critical applications requiring placement of benchmarks in concrete. One-piece construction of type 18-8 stainless steel. Same 95 degree useful limits as other benchmarks. Dimension from base to centerline of ball is 1-3/4".
	Item 20 -- Benchmark Mount This item provides a excellent means of mounting the covered benchmark (item 10) to concrete or masonry structures or foundations. The unit includes a concrete anchor, 3/8-16 NC stud, and a heavy mounting washer. This mount is installed in a 5/8" diameter by 1-3/4" deep hole. Epoxy cement may be applied at assembly to enhance mechanical integrity. The benchmark (item 10) is not included.

Benchmark Gauge Sets Benchmark Instructions Price Schedule

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