Spiral-Grooved Dowel Pins tend to have slightly stricter tolerances. Additionally, Multi-Grooved Dowel Pins, due to their design, slightly compress upon insertion, which some believe make them easier to work with. Studies have shown that Multi-Grooved Dowel Pin perhaps produces a slightly stronger bond. Groove Type: Both Multi- and Spiral-Grooved Dowel pins, when used properly, have ideal bonding strength. ![]() If you are using a 2” dowel pin, for example, each boring depth should be 1/16” longer than half the length of the pin, or 1.0625” Length: When determining the length of the dowel pin needed remember that 1/16” of space should be left in the boring after pin insertion, to allow for glue disbursement. If your product is 1-1/4” thick, a 7/16” diameter would be more suitable. For example, if your product is 1” thick, you should be considering a dowel pin 3/8” in diameter. Decisions to make when deciding which type of dowel pin is most suitable for your operation:ĭiameter: Ideally, the diameter of the dowel should be approximately 1/3 – and never more than 1/2 – of the thickness of the wood being joined.
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