A-A-59882, COMMERCIAL ITEM DESCRIPTION: GEOMETRY MEASURING MACHINE (12 JAN 2011)
A-A-59882, COMMERCIAL ITEM DESCRIPTION: GEOMETRY MEASURING MACHINE (12 JAN 2011)., This Commercial Item Description (CID) covers the circular geometry measuring machine and components. Each circular geometry measuring machine shall be a bench top model. Each circular geometry measuring machine shall have a minimum weight capacity of 40 pounds. Each circular geometry measuring machine shall use a mechanical bearing to eliminate the need for an air compressor. Each circular geometry measuring machine must be capable of operating using 120-volt, 60 Hz electrical power requirements. Each circular geometry measuring machine shall be equipped with a column that extends at least 20 inches above the rotary table top to allow parts up to 20 inches in length to be inspected/measured. The vertical column shall be designed to allow the gage head to be elevated or lowered and allow for the precision alignment (centering and tilting) of cylindrical parts. The mechanism of elevating and/or lowering the gage head can be controlled manually or with the use of an electronic controller. In either case, the movement shall be smooth. Systems that use movable vertical height gage stands instead of permanently mounted vertical columns must include two height gage stands and two gage heads. The gage head amplifier shall allow the use of two gage heads during the alignment (tilt and centering) of cylindrical parts under test. The two vertical height gage stands must be of equal length. Each circular geometry measuring machine shall be equipped with a rotary table that meets the following requirements: Minimum of 5 inches in diameter. Shall include tilt and centering adjustment knobs. The tilt and centering functions for the rotary table shall be adjusted using computer aided displays and manual adjustment. The tilt axis location for the rotary table shall be identified to ensure proper placement of gage head during tilt/centering functions for cylindrical parts. A test sphere shall be provided with each circular geometry measuring machine and shall conform to the following requirements: Manufactured from solid chromium carbide type steel, approximately 0.5 inches in diameter. Out of roundness shall not exceed 5 microinches (μin). It shall be mounted on a base that will allow easy access to the equator. Each test sphere shall have a protective covering that screws over the sphere or fitted in a hard wood box with positive action latches. Each circular geometry measuring machine shall include a sturdy work table suitable for placing the circular geometry measuring machine and computer components on and performing measurements. The work table shall be a minimum of 32 inches in height. The work table shall include a storage drawer for various components. Each circular geometry measuring machine shall include a minimum of one electronic gage head/amplifier and stylus assortment. The amplifier display shall have the capability to change resolution for visual evaluation based on part geometry. The circular geometry measuring machine shall be computer/software/menu driven using Microsoft Windows based Operating System.