A tone bar spring is a metal spring that is inserted between a tone bar and the harp of a Rhodes piano. Its function is to keep the tine and tone bar under tension so they remain in position for the hammer to strike the tine and generate a tone. There are two springs in […]

A transformer is a device in an electronic circuit that changes the voltage of AC current. It consists of two coils of wire wrapped around a magnetic core. The primary winding is connected to the input voltage, usually mains power. The secondary winding is connected to the output for the electronic device. In an Wurlitzer […]

Let-off, also known as escapement, is the mechanism of the hammer releasing from the jack and lower action when the key is struck. It is a critical part of the action mechanism, and very influential in the touch and feel of the piano. It is sometimes called ‘set-off’ in the UK. Function: Let-off is designed […]

A jack is the L shaped component that is found in piano actions, and the whip assembly in Wurlitzer pianos. In Wurlitzer pianos, it is commonly known as the fly – but the two terms are interchangable. Function: The jack plays a crucial roll in let-off, a major part of the action process when the […]

Key spacing is a part of keyboard regulation of acoustic and electric pianos. It is the process of adjusting the key so they are even in distance from each other. This applies to all keys but is more noticeable in the white keys. For acoustic pianos, Rhodes, and Wurlitzer pianos, key spacing forms one of […]

Side play refers to the side-to-side movement, rocking, or ‘wiggle’ that occurs on keys when the key bushings have loosened over time. Adjusting it is a part of keyboard regulation along with key spacing, key squaring, and key height and key dip adjustment. On new pianos there should be very little side play of the […]

The damper regulating screw, also known as the damper screw, is a long flathead/hex screw on the rear side of the whip in a Wurlitzer piano action. Each note has an individual action mechanism that includes this screw. It forms part of the whip assembly. Threaded through the screw is the damper grommet which connects […]

A damper arm, also known as a damper lever is an action component on acoustic pianos, and Rhodes and Wurlitzer pianos. On all pianos it is a lever that has damper felt at one end, and is engaged by the other parts of the action mechanism at the other. It’s function is as followed: View […]

A damper arm is an action mechanism found in Wurlitzer pianos. It is responsible for lifting the damper felt away from the reed when it is struck by the hammer. This causes the reed to sustain. When the key is released, the damper arm falls down and the damper felt mutes the reed. It also […]

In electric pianos, a pickup is an electronic device that captures the vibration of the tine, reed, or string and converts it to an electrical signal. There are two main types of pickup that are used in electric piano instruments: Electromagnetic Pickups: Electromagnetic pickups use a magnet and coil arrangement where a magnet is surrounded […]

A front rail pin is a metal pin that is inserted into the front rail. Its purpose is to catch and support the key when the key has been pressed. They are usually made of nickel plated steel, and are oval shaped. When the key is pressed the pin enters the front of the key […]

On Hohner Pianets a sticky pad is a small rubber pad that sits on the hammer arm at the far end of the key. Its function is to mute the Pianet reed when the key is at rest position, and to spring off the reed when the key is played. This lifting off the reed […]

On acoustic and electric pianos, the front rail is a horizontal wooden rail that sits underneath the front point of the keys. It houses the front rail pins, metal pins that the keys are inserted into. The front rail and pins acts as a catcher for the key when it is pressed, reducing its side […]

A damper grommet is a small circular rubber grommet found on the damper regulating screw of each note in Wurlitzer pianos. It is either black or grey in colour, depending on the model of Wurlitzer and year of manufacture. It inserts into a the damper lever clip found on the damper arm. Function: The grommet’s […]

A balance rail pin is a metal pin that is inserted into the balance rail. Its purpose is to house the key and act as a pivot for when the key is pressed. They are usually made of nickel plated steel, and are circular in shape. The key is inserted into the balance rail via […]

A resistor is a component in an electronic circuit that is used to create resistance. It achieves this by limiting the flow of electric current. If we compare electrical flow of energy to a water pipe, a resistor is like a tap that can limit the amount of water being moved through the pipe. Resistance […]

A tone bar grommet is a rubber grommet that is inserted between a tone bar and the harp of a Rhodes piano. Its function is to dampen vibrations between these two parts. There are two grommets in each tone bar assembly. Function: The grommets work alongside the tone bar screws, and the tone bar springs. […]

A tine screw is a machine screw that connects the tine and the tone bar. Its function is to connect these two components of the tone bar assembly. It has a hex screw head, and can be adjusted with a 5/16″ nut driver. It usually has an engraved V on the top face. It is […]

On acoustic and electric pianos, the balance rail is a horizontal wooden rail that sits underneath the centre point of the keys. It houses the balance rail pins, metal pins that the keys are inserted into. The balance rail acts as a pivot point as the musician presses the key – making it a critical […]

A tine spring, also known as a tuning spring or tine coil, is a metal coil of wire that is inserted on to the tine of a note in a Rhodes piano. Its function is to finely adjust the tuning of a particular note. Each tone bar assembly on a Rhodes piano has a tine […]