Starrett Indicator Accessories

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Magnetic Base Universal Indicator Holder
with triple-jointed arm and fine-adjustment
No. 657-1 and -2 Series

This versatile indicator holder has three pivots available for positioning the indicator where needed. All pivots are controlled by one tightening knob. It will hold:
• Any indicator with a 3/8" (9.5 mm) stem (such as our No. 25 and Nos. 650 and 651 Series)
• Any indicator with a standard dovetail mount (such as our Nos. 708, 709, and 811 Series)
• Any indicator with a 1/4" (6.3 mm) shank (such as our No. 196 Series)
• Any indicator with a 3/16" (4.7 mm) shank (such as our Nos. 708, 709, 811, and 711 Series)
• Any indicator with a body clamp (such as our No. 711 Series)

• The working area is within a hemisphere having a radius of approximately 12" (300 mm)
• The very sensitive fine-adjustment is located on the magnetic base to eliminate indicator deflection when it is being adjusted
• The No. 657-3 Universal Indicator Holder Arm Assembly can also be used on the No. 659 Threaded Adapter, No. PT18318

Above, No. 657-1 shown with No. 196B1 Universal Dial Test Indicator. Bottom inset: No. 709A Dial Test Indicator with dovetail mount.

Complete Assemblies

Part Number	Description	Page	Price
657-1	Universal Indicator Holder, No. 657W Fine-Adjustment, No. 657P Magnetic Base, No. PT17850 Indicator Holding Rod, and No. 657S Snug	429	$178.50
657-2	Universal Indicator Holder with No. 657 Magnetic Base	429	$142.80

Individual Components

Part Number	Photo Key	Description	Page	Price
657-3	A	Universal Indicator Holder Arm Assembly Only	429	$77.35
657W	B	Fine-Adjustment Attachment	429	$23.80
PT17850	C	Indicator Holding Rod	429	$2.21
657P	D	Magnetic Base	429	$62.90
657S	E	Snug with Two 1/4" (6.3 mm) Holes	429	$10.03

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