Yun's Piano Tuning and Service
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Strike Weight Adjustment

2/19/2022

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Strike weight (SW) is also hammer weight. It is measured with hammer flange pin resting right on top of bearing. SW is tapered from bass to treble, heavy to light.
After measuring the original Strike Weight (SW), and calculation by the shop owner, Mr. Jude Reveley, the SW needs to be adjusted to a even curve by leaving it, adding lead, or sanding material off.
To add weight, drill into hammer bolding (the wooden part), cut lead to length, and press lead in. Slight pressure is applied so not to crack the wood. Then measure SW again to double check.
To reduce weight, sand some materials off from the molding. The weight calculation enables minimum reduction of weight so the hammer's shape won't be greatly compromised. Double check on scale after sanding. 
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