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The dowel is a cylindrical shape made of , , or . In its original manufactured form, a dowel is long and called a dowel rod, which are often cut into shorter dowel pins. Dowels are commonly used as structural reinforcements in and in numerous other applications, including:

  • Furniture shelf supports
  • Moveable game pieces (i.e. pegs)
  • Hangers for items such as clothing, key rings, and tools
  • Wheel in toys
  • in gymnastics grips
  • Supports for tiered


Wood dowel

Manufacturing process
The traditional tool for making dowels is a dowel plate, an iron (or better, hardened ) plate with a hole having the size of the desired dowel. To make a dowel, a piece of wood is split or whittled to a size slightly bigger than desired and then driven through the hole in the dowel plate. The sharp edges of the hole shear off the excess wood.Ivin Sickels, Exercises in Wood-Working, American Book Company, 1889; see Exercise 18.— Uniting with Dowels, pages 104-105.Dowel Making and Doweling, Scientific American, Vol. XLIX, No. 6 (Aug. 11, 1883); page 88.H. H. Parker, Making Wood Dowels, Popular Mechanics, Vol. 41, No. 6 (June, 1924); page 957.

A second approach to cutting dowels is to rotate a piece of oversized stock past a fixed knife, or alternatively, to rotate the knife around the stock. Machines based on this principle emerged in the 19th century.William H. Whitlock, Improvement in Turning Tool, , granted Oct. 27, 1868.Sanford A. Penny, Lathe, , granted Feb. 19, 1889. Frequently, these are small bench-mounted tools.Edward A. Cherry, Tool for Forming Round Dowels and Rods, , granted Feb. 1, 1921; this is the Stanley No. 77 Dowel and Rod Turner.Abdul Aziz, Leonard G. Lee and Lloyd Sevack, Dowel Maker, , granted Aug. 26, 2001; this is the Lee Valley Veritas Dowel Maker.

For modest volumes, wood dowels are typically manufactured on industrial dowel based on the same principles as the rotary cutters described above. Such machines may employ interchangeable cutting heads of varying , thus enabling the machines to be quickly changed to manufacture different dowel diameters. Typically, the mechanism is open-ended, with material guides at the machine's entry and exit to enable fabrication of continuous dowel rods of unlimited length. Since the 19th century, some of these dowel machines have had power feed mechanisms to move the stock past the cutting mechanism.Oscar H. Ordway, Dowel Making Machine, , granted May 10, 1898.George W. Davis, Dowel-Making Machine, , granted Aug. 22, 1922.


Application
When dowels are glued into , a very common case in dowel-based joinery, there must be a path for air and excess glue to escape when the dowel is pressed into place. If no provision is made to relieve the hydraulic pressure of air and glue, hammering the dowel home or clamping the joint can split the wood. An old solution to this problem is to plane a flat on the side of the dowel; some sources suggest planing the flat on the rough stock before the final shaping of the round dowel. Some dowel plates solve the problem by cutting a groove in the side of the dowel as it is forced through; this is done by a groove screw, a pointed screw intruding from the side into the dowel cutting opening.

When two pieces of wood are to be joined by dowels embedded in blind holes, there are numerous methods for aligning the holes. For example, pieces of shot may be placed between the wood pieces to produce indentations when the pieces are clamped together; after the clamp is released, the indentations indicate the center points for drilling.


History
The word dowel was used in ; it appears in Wycliffe's Bible translation (circa 1382–1395) in a list of the parts of a wheel: "...and the spokis, and dowlis of tho wheelis..." in Wycliffe's Bible.


See also

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