The magnetic base holder configuration on these series is the same as our No. 657AA, except the swivel post assembly on these holders provides universal adjustment in both horizontal and vertical planes. Available with Inch or Millimeter Starrett Dial Test Indicators, they save time in shop setup and other inspection jobs. These sets have been put together for your ordering convenience, but you can mix and match any of our test indicators and attachments with the No. 657A Magnetic Base and Swivel Post Assembly to suit your needs. For use with all Starrett Test, AGD, Dial, and Miniature-Dial Indicators. Also accomodates similar indicators of other manufacturers. Powerful, permanent magnetic base holds firmly to steel or iron surfaces - horizontally, vertically, upside-down. Push-buttons turns magnetic force on or off for quick, one-hand setup and takedown V-step adapts base to horizontal or vertical arbors and chucks. There is an extra 1/4-20 NC tapped hole in side of base for indicator mounting post. Three precision ground magnetic contact surfaces (plus V-step). Black wrinkle finish on non-working surfaces. Magnetic Base Assembly Features: A. No. 657P Magnetic Base is 1 15/16" x 1 5/8" x 1 7/8" (50 x 40 x 48 mm) deep B. Ball Joint Tensioning Cap Slot permits 90° post travel to horizontal position C. Post rotates 360° D. No. 657F Indicator Swivel Post Assembly is 6 1/2" (165 mm) high (less threaded end). Assembly consists of items B, C, E, F, G. E. Fine-Adjusting Screw Turn to zero set indicator F. Upper arm is 2" (50 mm) long with a 5/16" (8 mm) dia. and swings more than 180°, friction joint holds it in position G. 7/32" (5.5 mm) dia. step, 1/2" (13 mm) long

Part Number Description Price Add To Cart 657A Magnetic Base with Swivel Post Assembly $144.90 657P Magnetic Base Only $102.60 657F Swivel Post Assembly Only $44.00

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