Knob Hole / Shaft Types

Rotary Knobs

D-shaft, splined, and round knob holes are three different types of shafts that are commonly found on equipment and devices that use rotary knobs for control.

D-Shaft

A D-shaft, as the name suggests, is shaped like the letter "D" and has a flat side that allows the knob to be securely attached to the shaft. D-shaft knobs are often used in applications where the knob needs to be held in place and not rotate on the shaft.

Splined

A splined shaft, on the other hand, has a series of ridges or grooves that allow the knob to be attached to the shaft in a precise position. Splined shaft knobs are often used in applications where the knob needs to be held in a specific position, such as in volume controls or tuning knobs.

Round

A round knob hole is the most common type of shaft and is simply a smooth, cylindrical shaft that allows the knob to rotate freely. Round knob holes are often used in applications where the knob needs to be rotated continuously, such as in rotary switches or potentiometers.

Rotary Knob Summary

In summary, the main difference between D-shaft, splined, and round knob holes is in the way the knob is attached to the shaft and the type of control they offer. When choosing a knob for your equipment, it's important to ensure that the knob is compatible with the type of shaft on your device to ensure a secure and reliable connection.

Linear / Fader Caps

Linear fader cap knobs are a type of knob that is commonly used in audio mixers and other electronic equipment to control volume, levels, mix or other parameters. They typically feature a long, thin stem that fits over a fader or slider and can be moved up and down to adjust the level.

When it comes to fader cap knobs, there are several different mount types and sizes available, including 4mm, 8mm, fork, and other types.

4mm Fader Cap

4mm fader cap knobs are the most common type and are typically used in smaller equipment or for applications where space is limited. They have a stem that is 4mm in length and 1.2mm in width / thickness.

8mm Fader Cap

8mm fader cap knobs have a longer hole than their 4mm counterparts. They have a stem that is 8mm in length and are often used in larger equipment or for applications where a more rugged knob fixing is needed.

Fork Fader Cap

Fork fader cap knobs are a unique type of knob that features a forked stem that is designed to fit over a fader with a wide slot. They provide a secure grip and are often used in DJ mixers or other equipment with wide fader slots.

Linear / Fader Cap Summary

In summary, the main difference between 4mm, 8mm, fork, and other types of fader cap knobs is in their size and design, which can affect their compatibility with different types of equipment and the level of control they provide. When choosing a fader cap knob, it's important to consider your equipment's specifications and your specific needs to ensure a proper fit and optimal performance.