Hermle HM341-020/35 Mechanical Clock Movement

The Hermle HM341-020/35 is a precision-engineered German mechanical clock movement designed for pendulum wall and mantel clocks. This dependable 8-day, chain-driven movement delivers classic mechanical timekeeping and striking performance, making it a great choice for restorations, replacements, and custom clock builds.

Powered by weights and driven by a chain system, this movement runs for approximately eight days on a full wind. It features a bim-bam strike, producing a single strike at the half-hour and a two-tone strike pattern on the hour. The movement includes a three-hammer assembly that delivers a rich, traditional sound through chime rods or gong tubes.

The HM341-020/35 is designed for a 35 cm pendulum length, offering a balance of compact size and reliable performance for smaller floor clocks, wall clocks, and mantel pieces. The movement’s standard mounting dimensions make it compatible with many cases, and it comes with the essential clock components needed for installation.

Key Features & Specifications

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  8-day mechanical operation — winds once per week

  
  


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  Chain-driven weight system for consistent power

  
  


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  Bim-bam strike pattern (half-hour single, full hour double)

  
  


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  Three-hammer strike assembly

  
  


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  Designed for 35 cm pendulum length

  
  


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  Includes movement assembly with chains, suspension spring, leader, and hand nut

  
  


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  German-manufactured quality