The Starrett S668CZ shaft alignment clamp set includes two chain clamps, two 196B5 back-plunger dial indicator gauges, two PT18724 snugs, two extension plates, and various posts to perform radial and angular alignment of motors, pumps, and compressors. The set comes in a fitted case for organization and protection.

The clamp set provides a pair of indicator gauges to measure alignment distortion, with a configurable armature to secure the gauges in position on two axes. The two chain clamps consist of a black anodized aluminum frame with a roller chain that can secure the clamp around a shaft up to 7.5 inches in diameter. The three pairs of 3/8-inch diameter posts measure to 5”, 7-7/16”, and 9” in length, and are made of stainless steel for rigidity. Two extension plates provide additional radial clearance when needed. Two stainless steel snugs secure one post to another, to hold the gauges in measuring position. The two 196B5 back-plunger dial indicator gauges have three contact points and are graduated to 0.001”, with a travel range to 0.2” The gauges have a 0.25” shank, a white dial face with numbers ascending from 0 to 50 and descending back to 0, and a rotating knurled bezel to set the dial pointer to the zero position.

Clamps are fastening tools that use pressure to secure workpieces to each other or to a workspace, and prevent movement. Clamp style varies widely, depending on general and specialized applications. Many clamps are for temporary use during construction, repair, or alignment of a workpiece, while others may be used to secure a component in its final installation or assembly.

The L.S. Starrett Company manufactures precision measuring tools, metrology and testing equipment, and saw blade products. The company was founded in 1880 and is headquartered in Athol, MA.

What’s in the Box?

• Two chain clamps
• Two 1965B back-plunger dial indicator gauges
• Two PT18724 snugs
• Two extension plates
• Two 5” posts
• Two 7-7/16” posts
• Two 9” posts
• Fitted case