Repairs Flashcards
What is the purpose of key bushings in rebushing?
Fix worn or tight key bushings in the front and balance rail mortises
Key bushings are crucial for maintaining proper key action in musical instruments, particularly in pianos.
What is the first step in the process of rebushing key bushings?
Choose correct felt and caul size by dry-fitting
Dry-fitting ensures the correct size before permanent adhesion.
What adhesive is used to glue felt in place during the rebushing process?
Elmer’s glue
This type of glue is commonly used for its strong bonding properties.
What tools are needed for rebushing key bushings?
- Bushing felt & cauls
- Calipers
- Razor blade
- Glue
- Key easing pliers
These tools facilitate the precise fitting and adjustment of key bushings.
What is the purpose of repinning flanges?
Replace center pins in flanges when action is too loose/tight
Proper pinning ensures optimal action and responsiveness in the instrument.
What is the first step in the process of repinning flanges?
Perform the swing test to assess friction
The swing test helps determine how much friction is present, guiding further adjustments.
What tools are required for repinning flanges?
- Pin extractor
- Micrometer
- Reamers
- Center pins
These tools enable the extraction and replacement of pins accurately.
What is the purpose of rebushing a flange?
Replace flange felt bushings
Rebushing helps maintain the integrity and function of the flange assembly.
What is the first step in the process of rebushing a flange?
Drill out old bushing
This step is necessary to remove worn or damaged bushings before inserting new ones.
What are the materials used to insert new bushings in a flange?
New cloth (glue or water-activated)
The choice of adhesive will depend on the specific requirements of the application.
What is done after inserting the new bushing in a flange?
Trim excess and burnish felt to proper size
This ensures a snug fit and optimal performance of the flange.
What is the final step in rebushing a flange?
Repin flange as before
Ensuring the flange is properly pinned is crucial for its functionality.
What is the purpose of replacing a broken hammer shank?
To replace a broken hammer shank.
This process is part of maintaining the functionality of the instrument.
List the steps involved in replacing a broken hammer shank.
- Cut and sand away broken shank
- Drill out the old shank by hand
- Dry-fit new shank and hammer head, adjust length and alignment
- Glue and reassemble, ensuring everything is aligned
Each step is crucial for proper installation.
What tools are needed for replacing a broken hammer shank?
- Drill
- Sanding paddle
- Glue
- Cutting tools
- New shanks
These tools are essential for the repair process.
What is the purpose of replacing plain wire strings?
To replace plain wire strings.
This is necessary for maintaining sound quality.
What is the first step in replacing plain wire strings?
Remove old string, measure with micrometer.
Accurate measurement is vital for proper replacement.
What tools are used to create and install a coil when replacing strings?
- Dummy pin
- Coil maker
- Tuning tools
These tools help in the correct installation of the new string.
Fill in the blank: When replacing strings, the string must be _______.
aligned, properly seated, and tightened gradually.
Proper alignment is critical for optimal performance.
What special consideration is there when replacing bass strings?
Bass strings are custom and must be ordered.
This is due to their unique specifications.
What steps must be taken to replace bass strings?
- Measure and gather specs (model, serial number, string #, etc.)
- Install similar to plain string, but account for felt patterns and heavy wire
- Twist string in winding direction before tensioning
Each step ensures the bass string fits properly.
What is the purpose of splicing strings?
Temporarily or permanently fix a string break, especially bass.
What is the first step in the splicing process?
Make two loops (one on each wire) with opposite tail orientations.
