Vintage Clock Parts Guide

Servicing a 1930s Kienzle Gong‑Strike Mantel Clock — Strike Timing, Gong Hammer Setup, and Movement Behavior
Servicing a 1930s Kienzle Gong‑Strike Mantel Clock — Strike Timing, Gong Hammer Setup, and Movement Behavior
Introduction Kienzle mantel clocks from the 1930s are well‑built German movements known for their smooth strike action and rich gong tone. When the strike becomes weak, mistimed, or fails to... Read more...
Broken Gear in a Regula 25 Cuckoo Movement — Diagnosing Damage, Replacing Wheels, and Restoring Strike Timing
Broken Gear in a Regula 25 Cuckoo Movement — Diagnosing Damage, Replacing Wheels, and Restoring Strike Timing
Introduction A broken gear in a Regula 25 cuckoo movement can stop the strike train, prevent the bird from emerging, or cause the bellows to lift unevenly. These movements are... Read more...
How to Replace a Mainspring in a Chelsea Clock — Safe Barrel Opening, Spring Handling, and Reassembly
How to Replace a Mainspring in a Chelsea Clock — Safe Barrel Opening, Spring Handling, and Reassembly
Introduction Chelsea clock mainsprings are housed in tightly fitted barrels that can be difficult to open without the right technique. Replacing the mainspring requires careful handling to avoid damaging the... Read more...
Fixing Count‑Wheel Strike Problems — Locking, Warning, Lift Timing, and Train Alignment
Fixing Count‑Wheel Strike Problems — Locking, Warning, Lift Timing, and Train Alignment
Introduction Count-wheel strike systems are simple and reliable when properly adjusted, but even small alignment errors can cause the strike to run on, stop early, or fail to lock. Most... Read more...
Servicing a Bulova D‑Cell Westminster Chime Clock — Power Flow, Speaker Output, and Movement Behavior
Servicing a Bulova D‑Cell Westminster Chime Clock — Power Flow, Speaker Output, and Movement Behavior
Introduction Bulova D-cell Westminster chime clocks use a high-torque quartz system designed to drive larger hands and power a full Westminster chime module. When the clock stops chiming, loses volume,... Read more...
Fixing a Slipping Hour Hand on a Kienzle Clock — Motion‑Works Friction, Hand Bushing Fit, and Strike‑Release Alignment
Fixing a Slipping Hour Hand on a Kienzle Clock — Motion‑Works Friction, Hand Bushing Fit, and Strike‑Release Alignment
Introduction When the hour hand on a Kienzle clock slips, drifts, or fails to keep pace with the minute hand, the issue is almost always in the motion works. These... Read more...
Why a Strike Fly Spins on Its Shaft — Diagnosing Power Loss, Loose Friction Fits, and Strike‑Train Behavior
Why a Strike Fly Spins on Its Shaft — Diagnosing Power Loss, Loose Friction Fits, and Strike‑Train Behavior
Introduction When the strike fly spins freely on its arbor instead of controlling the speed of the strike train, the result is weak, erratic, or completely silent striking. This issue... Read more...
First‑Time Bushing Work on a Clock Movement — How to Diagnose Wear, Center a Pivot, and Install a Clean, Accurate Bushing
First‑Time Bushing Work on a Clock Movement — How to Diagnose Wear, Center a Pivot, and Install a Clean, Accurate Bushing
Introduction Worn pivot holes are one of the most common causes of power loss in mechanical clocks. When a pivot hole becomes oval or enlarged, the arbor leans, the gears... Read more...
Understanding an 8‑Day Cuckoo Clock Movement — Lift Wires, Strike Timing, and Common Setup Issues
Understanding an 8‑Day Cuckoo Clock Movement — Lift Wires, Strike Timing, and Common Setup Issues
Introduction Eight-day cuckoo clock movements are robust and reliable when properly set up, but issues with lift wires, strike timing, or pendulum alignment can cause weak calls, stalled strike trains,... Read more...
Fixing a Loose or Slipping Clutch on a New Haven Clock — Motion‑Works Diagnosis and Hand‑Setting Repair
Fixing a Loose or Slipping Clutch on a New Haven Clock — Motion‑Works Diagnosis and Hand‑Setting Repair
Introduction When the hands on a New Haven clock fail to move—or move only when pushed—the issue is almost always a slipping clutch in the motion works. This clutch provides... Read more...
Why a Bulova Quartz Clock Won’t Chime — Power Issues, Speaker Problems, and Movement Diagnostics
Why a Bulova Quartz Clock Won’t Chime — Power Issues, Speaker Problems, and Movement Diagnostics
Introduction Bulova quartz clocks with chime functions rely on a combination of electronic timing, speaker output, and pendulum or decorative motion systems. When the chime stops working, the cause is... Read more...
What to Use (and Not Use) When Lubricating Clock Mainsprings — Safe Application, Power Control, and Movement Testing
What to Use (and Not Use) When Lubricating Clock Mainsprings — Safe Application, Power Control, and Movement Testing
Introduction Mainspring lubrication is one of the most misunderstood areas of clock servicing. Using the wrong lubricant—or applying it incorrectly—can cause sticking, surging, or complete power loss. This guide explains... Read more...