Leather stitching, whip plaiting, Turk's heads, paracord bracelets and handle wraps, the guides, the tools, the video shelves. All free.
Fresh at the bench
The stitch math, the knot counts, the cord lengths, nothing here is for sale.
SPI to spacing: the thread's length for your seam, the app's own formulas, in the browser.
Bights × leads: how many cords a knot needs, and its crossings, the knot math, live.
wrist + π×thickness, the cord on a handle, gutted, the wraps' real figures.
Bights, leads, gcd: why some knots need one cord and others three, the knot's own arithmetic.
The shelf
Leather, whips, knots, wraps, each carries its math. The app packs all of it: Mandrel Bench, offline, everything prints at true size.
SPI to spacing, the thread's diameter, the saddle stitch's length, the irons' real sizes.
🪢The bights and leads, gcd, crossings, and the coding families, knots by arithmetic.
🪝The 4.6× rule for strand width, the lace's 1.7×, and the taper's pairs.
📿The bracelet's length, the handle's cord, gutted or not, measured, honest math.
Long-form, sourced from the app's tested rules, every number carries its source.
Bights × leads, the gcd that picks the cords, the crossings, and the coding families.
Read the guide →The 4.6× strand rule at its honest 43°, the lace's 1.7×, and dropping pairs on plan.
Read the guide →SPI to spacing, the thread's diameter, the thread length that never runs short.
Read the guide →What's here
Calculators, video shelves, guides for the parts that go wrong. All free.
Stitch spacing and thread length, knot arithmetic, bracelet sizing, handle wraps, right in the browser.
Channel-surf the real plaiters, stitchers and knotters as clips pass review.
Guides with their sources, the app's tested rules, written out plain.
One line when a guide or calculator lands. Mail volume: whip-speed, slow and deliberate.
Building with the app? Mandrel Bench works offline, no account.
The bench family
The knot bench sits with the handcrafts: chart the beads, weave the band, ferment the jar, cut it for real.
Patterns for eleven bead crafts, charts at true bead size, shopping lists with codes.
🧶Tablet weaving, inkle, macramé, alphas and rugs, real drafts, plus the DMC spectrum.
🎭The costume workshop: masks, props, LEDs, and the cues that bring them alive.
🫙Ferments, brews, chocolate and dye, every percentage names its base.
🪚Laser cutting and 3D printing, the drying table, the kerf, the machines' math.
🫧The slime site that started the family style, recipes, games, the curriculum.