Bow Limb Lamination Thickness

Bow making limb lam thicknessing jig. Hence a lamination film measuring 1 5mil would be 0015 thick. The ideal thickness for a bow limb needs to be considered in the context of the required bend radius of the limb which is determined primarily by the length of the bow and expected draw length.

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There is two sided carpet tape under the top strip of sandpaper.

Bow limb lamination thickness.

The straight longbow hill style bow the straight longbow is the simplest bow form and has some advantages that. 0 090 60 70 0 085 55 65 caution. The bow profile describes the form of the bow when it s unstrung. This photo shows running a lamination sled through the grinder from right to left.

How is lamination film measured. Using the bingham s draw weight chart for a 1 3 4 width 62 take down recurve between 50 and 55 lbs. 0 080 50 60 wood and fiberglass laminations 0 075 45 55 can give splinters and cause 0 070 40. This is the same piece of wood that i used in the riser.

The sled is a piece of mdf board. In a recurve bow a change of 001 of an inch may roughly translate to a 1 pound change in draw weight. Determine the tip thickness you want for your particular lamination to be ground and using a scrap piece of material place it next to the butt of your pattern lamination and place them side by side and between the jig and the spindle. The thickness of your limb kit directly determines the poundage of the bow.

Length width draw length and weight can be traded off in order to get the thickness to come in at the ideal for a particular wood type. Likewise a film measuring 10mil would be 010 thick. Lamination film is measured in mil thicknesses. On the front and back of each limb will be a thin layer of kingwood and then clear fiberglass.

66 bow bow weights measured at 28 during the bow building butt thickness 040 fiberglass 050 fiberglass process your bow design and 0 100 70 80 limb width will impact bow 0 095 65 75 weight considerably. There is also carpet tape under the lamination holding it to the sled. Together with the width and the thickness of the limbs it s responsible for the characteristics of the bow during the draw and the release of the arrow. I need a thickness between 256 and 262.

The thickness of the laminations will determine the draw weight of the bow and the taper will help define the curve of the limbs. How do i determine the thickness of my limb kit lamination stack. Adjust your jig until you ve got the desired gap by using scrap material to check your thickness. One mil is equal to 001 or 1 1000ths of an inch a mil is not the same as a millimeter.

Each limb will get three of these tapers and one strip of parallel thickness hard rock maple that is from the piece of wood my father cut so many years ago. This is a typical lamination sled with sand paper to hold the lamination blank.