Starrett 657AA Magnetic Base

Product Overview: Starrett 657AA Magnetic Base

Test indicators cannot be used without proper holders. Starrett has a variety of holders available. This selection should handle virtually any job that needs to be done.

For use with all Starrett Test, Back-Plunger, AGD, Dial and Miniature-Dial Indicators. Also accommodates similar indicators of other manufacturers.

A. No. 657P Magnetic Base. 1 15/16” x 1 5/8” x 1 7/8” (50 x 40 x 48mm). Push-button on/off switch for one-hand operation. Base has three precision ground, magnetic contact points. Grips horizontally, vertically, and upside down. V-step holds base to arbors, shafts, etc. Base has extra 1/4-20” tapped hole on one side for mounting post. Black wrinkle finish on non-working surfaces.

B. No. 657G Upright Base Post. 3/8′ (9.5mm) diameter x 7 7/16” (190mm) length overall. Starrett No. 57S and No. 58S Universal Snugs may also be used.

C. No. 657S Snug. Two 1/4” (6.3mm) diameter holes. Adapts Nos. 196, 650, and 651 Series Dial Indicators and No. 657Y Indicator Attachment to No. 657X Rod.

D. No. 657X Rod. 1/4” (6.3mm) diameter x 6” (150mm) long. Accommodates Starrett Nos. 708, 709, 811 and 711F Series Dial Test Indicators and No. 657S Sleeve.

E. No. 657Y Indicator Attachment. 1/4” (6.3mm) O.D. one end, other end threaded and fits lug backs of all AGD indicators (Starrett Series Nos. 81, 25, 655, 656) and Series No. 80 Miniature Indicators.

F. No. PT18724 Snug 3/8” (9.5mm) diameter post hole. 1/4” (6.3mm) diameter gripping hole accommodates No. 657X Rod.