But who standardized 1s cotton as 840 yd/lb, and was it tied to the old 7x120-yard hank convention? I’m aligning count-to-twist settings on a Ne 30 ring line running about 14,500 rpm and want the origin straight to help explain the metric to operators and cut mis-set rates.
It’s the old Lancashire reeling convention — 7 leas of 120 yards made a cotton hank, later codified in trade standards — so 1s = 840 yd/lb. > straight to help explain the metric to operators and cut mis-set rates. I cut mis-sets by posting one line at each frame: Ne 30 @ 14.5k rpm → TM 3.8 ≈ 20.8 TPI → front delivery about 17.7 m/min; want the card template?
@tGriffiths22 is right on the reeling origin; the 840 yd/lb stuck via 19th‑c Manchester price lists and Board of Trade tables that defined a cotton hank as 7×120 yd, later echoed in standards. You’ll see the same convention embedded in ASTM D1907 and ISO 2060, so it’s not arbitrary — it’s inherited trade math. For your crew, post a simple note: “Ne = hanks per lb (1 hank = 840 yd); tex ≈ 590.5/Ne,” and blame the reel, not the math.
On our Ne 30 at about 14,500 rpm, the fastest win was a small placard on each head: ‘Ne = number of 840 yards per lb; 1 = 7 leas × 120 yards’ plus ‘TPI = TM*sqrt(Ne)’, so the origin and the knob setting live together. Also note that worsted uses a 560 base to prevent cross‑system mix‑ups; a quick reference like Units of textile measurement - Wikipedia helps.
Hand‑reel logic: cotton kept the 120‑yard skein and bundled seven into a hank, then 19th‑c Manchester price lists and Board of Trade specs fixed it to the avoirdupois pound — like the baker’s dozen of yarn counts. For the crew, a tiny card with “tex ≈ 590.5/Ne” and “Ne 30 ≈ 19.7 tex” plus a QR to Units of textile measurement - Wikipedia tends to stop wrong twist presets; want a one‑liner graphic?
Ne’s anchor came from hand reels: skeins wound on a 1.5‑yd circumference reel became the standard hank, later tied to the avoirdupois pound by trade practice. For the Ne 30 line, stick this in the HMI help: “Ne = how many standard cotton hanks make one pound” and include tex ≈ 590.5/Ne so the metric folks have a bridge — it cuts mis‑sets faster than any history lesson. @ethanJ75, do you label “cotton Ne” anywhere to avoid confusion with worsted counts?