Introduction
Clock hands are one of the most commonly replaced parts in clock repair. Choosing the wrong length, hole size, or style leads to clearance issues, poor visibility, or hands that won’t fit the movement at all. This guide explains how to choose the correct clock hands for your mechanical clock.
Understanding Clock Hand Sizing
Minute hand length determines overall size
Hand sets are sized by the minute hand, measured from the center hole to the tip.
Hour hand is proportional
The hour hand is always shorter and matched to the minute hand length.
Hands must match the dial diameter
Hands that are too long hit the chapter ring; hands that are too short look undersized.
How to Measure Clock Hand Length
Measure from the center hole to the tip
Do not measure the entire hand. Only the visible portion counts.
Match the dial’s visible radius
The minute hand should reach near the minute track without touching it.
Check for case clearance
Ensure the hands will not hit the glass, bezel, or each other.
Understanding Hand Hole Sizes
Minute hand hole types
Most mechanical clocks use either a square hole or an oblong hole for the minute hand.
Hour hand hole is friction-fit
The hour hand uses a round, tapered hole that presses onto the hour tube.
Hole sizes vary by manufacturer
Hermle, Urgos, Kieninger, and American clocks all use different hole dimensions.
Matching Hands to the Movement
Identify the movement manufacturer
Hermle, Urgos, and Kieninger hands are not interchangeable.
Match the hand shaft style
Square, oblong, and round holes must match the movement’s hand shaft exactly.
Check for chime‑side clearance
On chime clocks, hands must clear the chime selection lever.
Choosing the Right Hand Style
Spade hands
Classic style used on many German and American clocks.
Serpentine hands
Decorative, used on antique and reproduction clocks.
Modern straight hands
Used on contemporary clocks with minimalist dials.
Common Mistakes When Choosing Clock Hands
Guessing the minute‑hand hole size
This is the #1 cause of misorders. Always measure or match the movement.
Choosing hands that are too long
Long hands hit the dial, bezel, or each other.
Mixing incompatible hand styles
Hands must match the clock’s dial design and movement type.
Recommended Internal Links
FAQs
How do I know what size hands my clock needs?
Measure the minute hand from the center hole to the tip and match it to the dial diameter.
How do I measure the minute‑hand hole?
Use calipers to measure the width of the square or oblong hole.
Do all clock movements use the same hand hole size?
No. Hole sizes vary widely by manufacturer.
Can I bend hands to make them fit?
No. Bending hands causes rubbing, wobble, and poor alignment.
Why won’t my hour hand stay on?
The hour hand is friction‑fit. If loose, gently press it further onto the hour tube.
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