Is Sinew Backing Necessary For Every Bow?

Types of Bows That Benefit From Sinew Backing

Sinew backing is particularly useful for bows made from staves with a large diameter or a high percentage of sapwood. For example, a stave with a diameter of 2 inches or more may benefit from sinew backing to help stabilize the bow’s limbs and prevent cracking under stress. In these cases, a sinew backing can help distribute the stress more evenly and provide a smoother draw.

Applying Sinew Backing

To apply sinew backing, start by carefully selecting and preparing the sinew material. A good rule of thumb is to use sinew that is 1/8 inch thick and has a high tensile strength. Next, apply a thin layer of sinew to the back of the bow, working from the center outwards. Use a small tool, such as a blunt knife or a bone awl, to press the sinew firmly onto the bow’s surface. For a 60-inch bow, you may need to use 2-3 ounces of sinew, spread evenly across the back of the bow.

Choosing the Right Materials

When selecting a stave for bow making, consider the type of wood, the diameter, and the percentage of sapwood. For a bow that will benefit from sinew backing, look for staves with a diameter of 1-2 inches and a high percentage of heartwood. For example, a stave made from a straight-grained, 1-inch diameter branch of Osage orange or Hickory may be an ideal choice. These woods have high tensile strength and are less prone to cracking than other types of wood, making them well-suited for sinew-backed bows.