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IndIcAtor Holders

657AA MAGnetIc bAse IndIcAtor Holder
For use with all Starrett Test, Back-Plunger, AGD, Dial and Miniature-Dial Indicators. Also
accommodates similar indicators of other manufacturers.
A. 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. 657G Upright Base Post. 3/8" (9.5mm) diameter x 7-7/16" (190mm) length overall. 57S and
58S Universal Snugs may also be used. IndIca tors and GaGes
C. 657S Snug. Two 1/4" (6.3mm) diameter holes. Adapts 196, 650, and 651 Dial Indicators and
657Y Indicator Attachment to 657X Rod.
657Y with lug-on-center back
D. 657X Rod. 1/4" (6.3mm) diameter x 6" (150mm) long. Accommodates Starrett 708, 709, 811
and 711F Dial Test Indicators and 657S Sleeve.
E. 657Y Indicator Attachment. 1/4" (6.3mm) O.D. one end, other end threaded and fits lug backs
of all AGD indicators (81, 25, 655, 656) and 80 Miniature Indicators.
F. PT18724 Snug. 3/8" (9.5mm) diameter post hole. 1/4" (6.3mm) diameter gripping hole
accommodates 657X Rod.

D
C

657AA with 196B1
Universal Dial Indicator
F

E

657AA Magnetic Base Indicator Holder - Individual Components B
Photo Key Cat. No. EDP Description
A 657P 52757 Magnetic Base Only
B 657G 52753 7-7/16" Upright Base Post Only
C 657S 52759 Snug with Two 1/4" (6.3 mm) Holes
D 657X 52764 Rod
E 657Y 52765 Indicator Attachment
Snug Complete – 1/4" and
F PT18724 50710
3/8" Holes
657AA Magnetic Base Indicator Holder - Complete Set
Cat. No. EDP Description
Magnetic Base with All Attachments – A, B,
657AA 52743 A
C, D, E, F
Base and Post Assembly with 650B1
657-650Z 65259
Indicator, 657S Snug, and 3 Contact Points
657AA with 711FS Last
®
Word Dial Test Indicator

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