The Starrett 1150 Dial Indicator Snap Gages are designed for measuring the outside diameters of round parts (e.g. cylinders and shafts), they have rigid aluminum alloy frames that are protected from hand heat by using the insulating handles. The Starrett 1150 gages are used to gage outside diameters to an accuracy of .0001in.

Dimensional variations are transmitted to the dial indicator through a linear friction-free transfer mechanism totally enclosed for protection against side thrust, foreign matter and coolants. Flat gaging contacts simplify measurement close to shoulders. The top sensitive contact may be reversed to present a spherical face to the work. An adjustable backstop simplifies centering the work. The contacts and backstop are 5/16in diameter hardened tool steel, precision ground and lapped flat. The contacts are individually adjustable to a maximum 2in range and are locked in position by tightening parallel-lock clamps to maintain parallelism of faces. Both contacts are also keyed to maintain orientation of faces regardless of adjustment.

Plus or minus tolerances are read directly from the indicator since the dial face has a double row of graduations reading in opposite directions from zero, with "minus" graduations in red and "plus" in black. The indicator can be rotated 360º and locked in position to read from any angle, and a fine-adjusting screw provides for zero setting the hand. A guard protects the dial indicator when the gage is laid down.

• Designed for measuring the outside diameters of round parts (e.g. cylinders and shafts)
• The contacts and backstop are 5/16in diameter hardened tool steel, precision ground and lapped flat
• Contacts are individually adjustable to max 2in range and are locked in position by tightening parallel lock clamps to maintain parallelism of faces
• Both contacts are keyed to maintain orientation of faces regardless of adjustment
• Plus and minus are read directly; The dial face has a double row of graduations reading in opposite directions (Red minus and black plus graduations)
• Indicator can be rotated 360° and locked in position to read from any angle; A fine-adjusting screw provides for zero setting the hand
• A guard protects the dial indicator when the gage is laid down
• Bench stand is available (sold separately) to convert the gage to a bench comparator