657E Series Features

• Base has three precision ground, magnetic contact surfaces.
• Grips horizontally, vertically or upside down. V-step holds base to round surfaces.
• Extra #1/4-20 tapped hole in one side of base (not shown) for mounting post.
• Available with or without Starrett AGD Dial Indicators: inch reading No. 25-131J (graduation .0005", dial reading 0-25-0, range .125") or millimeter reading No. 25-181J (graduation 0.01mm, dial reading 0-50-0, range 2.5mm).
• Other indicators can be furnished on request.

What's Included (See diagram)

A. No. 657P Magnetic Base
1 15/16" x 1 5/8" x 1 7/8" (50 x 40 x 48mm) deep. Push button on/off switch for one-hand operation.
B. No. 657G Upright Base Post
2. 3/8" (9.5mm) diameter x 7 7/16" (190mm) length overall.
C. No. 657H Swivel Post Snug
Allows universal indicator adjustment - up-and-down, any vertical angle, for a complete 360°. Two 3/8" (9.5mm) holes.
D. No. PT06784-A Gage Holding Rod
3/8" x 9 1/2" (9.5 x 240mm) with clamping mechanism for gripping the indicator lug back
E. and F. Nos. 57S and 58S Universal Snugs
Adapt various scribers and indicator shanks to rods and posts.