The Brown & Sharpe 599-7742-7 Dog-House Heavy Duty Large Magnetic Base, has a heavy-duty magnetic stand, on/off switch, and holds dial and dial test indicators securely upside down and in other difficult positions on smooth iron or steel surfaces. The 2-7/16 x 2-7/16 x 2-3/44 inch (H x W x D) base grips horizontally, vertically, and upside-down, with a simple on/off switch for one-handed operation. (H is the vertical distance from lowest to highest point; W is the horizontal distance from left to right; D is the horizontal distance from front to back.) Upright base post is 7-13/16” long and 0.987” in diameter, with an offset rod that is 10-1/16” long and 0.738” in diameter. Compatible with Brown & Sharpe dial and dial test indicators, as well as similar indicators from other manufacturers.
Magnetic bases are magnetic fixtures commonly used in metalworking to hold dial indicators, and are also used in other fields, such as optics. Magnetic bases can assist the user with setting up a workpiece in a milling machine, surface grinder, or other machine tool. The vertical post and rod in a magnetic base connect using swiveling connectors, or snugs. This allows free motion of the arm so that the dial indicator can be moved into position on the workpiece. Many magnetic bases have a V-step, which is a V-shaped notch in the base for holding the base to arbors, shafts, and other cylindrical items. The magnetic base has a circular hole through the center. A round permanent magnet is inserted into this hole, and a handle or button is attached to allow the user to rotate the magnet. Rotating the magnet turns the base on and off as this causes the position of the magnetic field to rotate as well. In the on position, the iron is acting as an extension of the magnet, while in the off position, the magnet is acting as a keeper, preventing the magnetic field from extending through the base.
Brown & Sharpe manufactures precision measuring equipment and metrology hand tools. The company, founded in 1833, played a key role in setting industrial standards in the United States. Brown & Sharpe was acquired by Hexagon Metrology in 2001 and is headquartered in North Kingstown, RI.