Center Gauges – Precision Thread Measuring Tools

Center gauges are essential precision tools for marine engineers and machinists, used to accurately set and inspect thread-cutting tools on lathes and other machinery. These gauges ensure the correct cutting angle, critical for producing accurate threads on bolts, shafts, and other components during ship maintenance and repair.

Constructed from hardened stainless steel, our center gauges offer excellent resistance to corrosion and wear, with clearly etched markings for easy reading. Available in both 55° and 60° versions to suit standard imperial and metric thread forms. Their compact size and durable construction make them an indispensable addition to any marine workshop or tool set.

Key Features

Technical Specifications

ModelCenter Gauge
Angle Types55° and 60°
MaterialStainless Steel
Accuracy±0.1°
Length3.5 inches (89 mm)
Width0.75 inches (19 mm)
FinishFine ground, satin
Weight0.2 oz (5.7 g)
ApplicationMarine engineering, lathe work, tool setting

Frequently Asked Questions

What are center gauges used for?

Center gauges are used to accurately set the cutting edge of a lathe tool to the correct angle for cutting threads. They also help verify the angle of thread-cutting tools and inspect the alignment of lathe centers.

What is the difference between 55° and 60° center gauges?

55° center gauges are used for British Whitworth threads, while 60° gauges are used for metric and unified (imperial) threads. Choose based on the thread standard you are working with.

Are these center gauges corrosion-resistant?

Yes, they are made of stainless steel, providing excellent resistance to corrosion and making them suitable for use in humid marine environments.

How do I use a center gauge?

Place the gauge against the tool bit edge in the tool post, align the gauge with the thread angle, and adjust the tool holder until the edge matches the gauge's notch. This ensures the tool is ground to the correct angle.

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