Starrett 120AM-150

Product Highlights

One full revolution of the dial is equivalent to 2 mm. The jaw depths on this caliper are approximately 1-1/2” or 38 mm for the outside measuring jaws and 5/8" or 16 mm on the inside measuring jaws. The jaw depths on this caliper are approximately 1-1/2” or 38 mm for the outside measuring jaws and 5/8" or 16 mm on the inside measuring jaws. The knife-edge contacts can be used to scribe parallel lines on the workpiece. This caliper can be used with one hand through operating the fine adjustment roll with the thumb. The lock screw locks the dial bezel and holds the sliding jaw in position. The depth rod is integrated into the rack of the caliper, unlike many calipers which offer a detachable depth rod, or none at all. The hardened stainless steel components, including the bar, measuring surfaces, rack, gears, and depth rod, offer corrosion resistance, increased accuracy, and long life. Positive split gear anti-backlash control offers increased accuracy over standard gear configurations. Backlash is the amount of clearance between mated gear teeth in the caliper controls, which prevents the gear teeth from jamming. It is undesirable to have much backlash due to the lack of precision offered by the increased amount of play between gears. Certain gear designs can minimize or eliminate backlash; split gear systems actually split the gear into two gears, each half as thick as the original gear. One of these gears is then fixed to the shaft while the other gear is allowed to turn. The free-turning gear is connected to coil springs that rotate it until all the backlash in the control system has been eliminated. The rack teeth point down to keep foreign matter from clogging the gear operations. This prevents measurement errors where metal chips could interfere with proper caliper operation.

• This series features white dial, 0-150mm range, and 0.02mm graduations
• 150mm, yellow Dial
• Fitted Plastic Case graduations