HM Series
The National Time HM Series clock mechanisms are the strongest in the industry due to its cast aluminum box construction. This worm gear transmission design outperforms those with parallel plates to withstand extreme forces that may be encountered in service. The HM mechanism is driven by a permanent magnet, 115V 50Hz or 60Hz synchronous gear. These mechanisms offer mounting options to suit all applications with dial sizes up to 72” diameter. Custom shaft lengths up to 24” can be provided to meet specific project requirements.
Common Features
Dial Sizes to 72"
Precision CNC machined cast aluminum box construction
Shaft extension to eliminate illuminated dial shadows
Through wall applications to 24"
Double Dial Back-to-Back spacing 10” to 24”
Front mount applications
UL 48 Listed
Manufactured in the U.S.A.
Variations
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HMR
The HMR employs an innovative transmission and reversible motor that will advance the hands 10 times speed for correction. Time correction can be controlled remotely using a 970 or 980 series manual control. A Master Clock Controller will provide automatic time corrections for daylight saving and power outages.
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HMDR
The HMDR is a double face version of the HMR. A single mechanism drives back-to-back clock dials with spacing between 10” and 24” with appropriate shaft selection.
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HMI
The HMI minute impulse advances incrementally each minute utilizing a single direction motor. An MC3 Master Clock Controller is required for operation and provides automatic correction. The HMI will not drift when employed in countries that do not regulate power line frequency or installations that may have generator backup power. An MC3 Master Clock with the 4 circuit expansion switches allows user to remotely adjust up to 4 clocks independently during installation or repair.
More Details
The National Time HM Series clock mechanisms are the strongest in the industry due to its cast aluminum box construction. This worm gear transmission design outperforms those with parallel plates to withstand extreme forces that may be encountered in service. The HM mechanism is driven by a permanent magnet, 115V 50Hz or 60Hz synchronous gear. These mechanisms offer mounting options to suit all applications with dial sizes up to 72” diameter. Custom shaft lengths up to 24” can be provided to meet specific project requirements....