METROL Tool Setting Probe H4A-12-21S H4A-12-21H

Buy online your METROL Tool Setting Probe H4A-12-21S from our UK e-store Cnc-shopping UK, specialist in CNC machine-tools spare parts.

The METROL H4A-12-21S a contact tool setter and the H4A-12-21H is a sensor head from the H4A series designed for automatic tool length measurement and broken tool detection on CNC machines. Mounted directly on the machine table or on a fixed bracket inside the enclosure, it provides a reliable trigger signal to the CNC control for automatic tool offset updates and precise tool positioning.

Manufactured in Japan, this compact mechanical probe is widely used on machining centers, CNC milling machines, and turning centers. It offers excellent repeatability and dependable triggering performance, even in environments exposed to coolant and metal chips. The H4A series supports routine tool length verification, tool wear monitoring, and broken tool detection to help maintain machining accuracy and part quality.

The H4A-12-21S is practical replacement solutions for maintenance and retrofit applications. Their simple integration and proven reliability help reduce machine downtime, maintain consistent tool offsets, and extend the service life of existing CNC equipment. Many maintenance teams keep these references in spare inventory to ensure fast recovery when a tool setter becomes damaged or worn.

Frequently asked questions about H4A-12-21S/H4A-12-21H:

Which CNC controls can use this METROL tool setter
Any control that supports a dedicated tool setter input and contact-trigger routine can typically integrate it. Verify the I/O wiring scheme, input voltage level specified by the builder, and the macro used for tool measurement.

What should be checked during replacement
Confirm fixed height from table, probe alignment, correct wiring to the tool setter input, and the measurement macro parameters. After installation, run a short verification cut to confirm offsets write correctly to the tool table.

Can it replace a different brand of fixed tool setter
Yes if the mounting dimensions, trigger characteristics and electrical interface match your machine requirements. Compare the original datasheet to the H4A series specifications or consult our team for cross-reference support.

Do you offer refurbished units or repair options
Availability can vary by reference and condition. Contact us for tested unit, refurbished unit, or repair service options, as well as lead times for worldwide shipping.