Large Clock Movements

National Time & Signal designs and manufactures a comprehensive line of clock movements. Our clock movements fit with different hands, dials and faces for any existing or new clock tower. Tower clock movements are available for interior or exterior clocks ranging from 12 inches up to 50 feet.

If you need a new high torque clock movement or a replacement for your existing tower clock, National Time & Signal can help. We can custom suit our clock movements to your needs and get you the perfect size and fit.

Our Clock Movement Series

Our broad inventory features indoor and outdoor clock movements. Each series uses worm gear drive technology to maintain accurate time-keeping.

We also have a range of hands to go with our movements and dials. Use our hand selection guide to view our options as you browse our clock movement selection. Our series include:

  • 2M series: The 2M series suits all clock dials up to 42 inches in diameter. A 115V 50Hz or 60Hz synchronous gear motor and permanent magnet power this movement. We also offer custom shaft sizes up to 10 inches.
  • 3M series: The 3M series works with dials up to 48 inches in diameter. Powered by a permanent magnet and a 115V 50Hz or 60Hz synchronous gear motor, also available in 24V, this series has three variations.
  • HM series: The HM series utilizes box construction and worm gear technology to withstand extreme conditions. This series works with up to 72-inch diameter dials. There are three variations, including the double-face HMDR.
  • 4M series: The 4M series contains a cast aluminum housing. One of our three larger series, the 4M clock movements work with dials up to 11 feet in diameter and various mounting applications.
  • 6M-11M series: The 6M-11M series movements work with dials up to 22 feet. They are available with power rings to suit LED-illuminated hands. The 6MR-11MR variation is synchronous, and the 6MI-11MI is a minute impulse variation.
  • 12M-15M series: Our largest series is the 12M-15M series. These clock movements work with dials up to 50 feet. Each variation is available with power rings to suit LED-illuminated hands, ball bearings and welded plate steel housings.

For in-depth details on our line of architectural clock products, view our product literature page and learn more about what National Time & Signal has to offer.

Long-Lasting Clock Movements From National Time & Signal

National Time & Signal is a clock designer and manufacturer with decades of experience. We specialize in timepieces, movements, controllers and motors for architectural clocks. If you want to add aesthetics to your park, street or public area, a clock tower offers both function and beauty.

We value craftsmanship above all else. That's why our time movements are designed to last. Our clock movements are easy to maintain and the most accurate in the industry.

We are here to discuss our clock movements and get you the best fit for your outdoor or large display. Contact us online to speak with an expert or request a free quote for any of our products.