Usage: 3 forms in 14 verses
Form Translated As     In Verse(s)
σφυρωτήροσ knob LXX.Gen.14.23
σφαιρωτήρεσ knobs LXX.Exod.25.31 • LXX.Exod.25.34 • LXX.Exod.25.36 • LXX.Exod.37.17 • LXX.Exod.37.20 • LXX.Exod.37.22
σφαιρωτήρ a knob LXX.Exod.25.33 • LXX.Exod.25.35 • LXX.Exod.37.19 • LXX.Exod.37.19 • LXX.Exod.37.21
knob LXX.Exod.25.35 • LXX.Exod.37.21

Liddell-Scott-Jones

σφαιρωτήρ (sphairōtēr) a knob G:N-M

σφαιρωτήρ-ωτήρ, ῆρος, ὁ,

thong, latchet, [Refs 2nd c.BC+]; compare σφυρωτήρ.

__II a ball to ornament pillars, knop, [LXX]: plural, as heraldic device, [Refs]

LSJ Scripture Refs: LXX.Exod.25.30*