1

Sometimes the knot on the tefillin shel rosh needs to be adjusted, either due to growth, haircut, or borrowing a pair of tefillin.

How is that knot adjusted?
What piece of the retzuah (strap) should be pulled, in which direction? How would you make it bigger or smaller?

This question is about the double daled knot. For the single daled knot, see this question.

  • Are all double dalet knots the same? – Yishai Oct 27 '14 at 20:21
  • @Yishai I assume so. Do you know something that I don't? – Shokhet Oct 27 '14 at 20:57
  • Shokhet, No, just my default assumption wouldn't be that this is the case. – Yishai Oct 27 '14 at 21:03
  • @Yishai All right, then. – Shokhet Oct 27 '14 at 21:05
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See this page on Tiferes Stam, which shows a diagram with instructions for both the double- and single-daled knots, as well as information about how the tefillin should fit. The instructions for tightening the double-daled knot are:

3-part diagram of the tightening process for the "double-daled" knot, with the knot oriented so that one of the free straps hangs down on the bottom-right. 1) Opening a loop on the bottom-left by pulling down. 2) Transferring the slack from the bottom-left to the top-right, moving the loop to the top- right. 3) Closing the loop by pulling the free strap on the bottom-right.

Say לשם קדושת תפילין, then

  1. Pull the strap marked with the arrow down, making the head loop smaller
  2. Close the loop you just made under the knot by pulling up from behind (direction of arrow).
  3. Close the second loop, made in step 2, by pulling down on the free-hanging part of the strap.
  4. Kesher is complete.

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