BOBBINS & SPOOLS Inches | Millimeters Bobbin Equipment Type Flange Diameter Traverse Barrel OD Bore Size(s) Drive Type 2.2 Bobbins Hacoba 24.90mm 56.13mm 12.45mm 8.48mm Right & left drives No. 1 Bobbin N E Butt/Wardwell 33.53mm & 37.08mm Smooth 76.20mm to 152.40mm; Textured, 83.82mm Smooth 15.88mm; Textured, 14.99mm 8.26mm 6 tooth ratchet 38mm Steeger 38.10mm 109.98mm 16.38mm 11.18mm Drive Slots 42mm Steeger 42.00mm 109.98mm 16.38mm 16.38mm Drive Slots A Spool (1 oz.) Thread 42.85mm 50.80mm 22.23mm 7.87mm   No.2 Bobbin N E Butt/Wardwell 45.97mm, Button Head 101.60mm to 152.40mm Smooth, 15.88 typical 8.38mm & 11.43mm 6 & 8 tooth ratchet, 8 tab tooth No.2 Bobbin N E Butt/Wardwell 45.97mm, Flat Head 101.60mm to 152.40mm Smooth, 15.88mm typical 8.38mm & 11.43mm 6 & 8 tooth ratchet, 8 tab tooth No. 2 Fine Wire N E Butt/Wardwell 46.23mm Wide Buton Head Smooth, 63.50mm & 69.85mm Smooth, 17.15mm 8.26mm 6 & 8 tooth ratchet or 8 tab tooth No.2 Bobbin N E Butt/Wardwell 46.48mm, Double Head 101.60mm to 152.40mm Smooth, 15.88mm typical 8.38mm & 11.53mm 6 & 8 tooth ratchet, 8 tab tooth B Spool (2 oz.) Thread 53.98mm 50.50mm 22.23mm 7.92mm   63 x 170 Ratera, Herzog, 63.50mm 170.00mm 21.08mm 13.97mm 7 pin slots 63 x 200 Ratera, Herzog, 63.50mm 200.00mm 21.08mm 13.97mm 7 pin slots CP-7.5 Ratera 154 65.53mm 169.42mm 27.43mm 16.51mm Slot - bottom flange CRB-01 Hacoba 65.78 69.09 34.03 16.51   CRB-02 Hacoba 65.78 103.38 34.03 16.51   CP-16 Wardwell 66.04mm 72.14mm 35.05mm 16.76mm   CP-24 Wardwell 66.04mm 106.68mm Smooth, 35.05mm 16.76mm   2 BDX-HC N E Butt/Wardwell 66.68mm 152.40mm to 203.20mm in 12.70mm increments Smooth, 17.45mm typical 10.31mm, 11.20mm, 12.85mm 8 tooth ratchet 10" Steeger Steeger 69.85mm 242.88mm Textured, 23.80mm 17.48mm Drive slot 2 BDX N E Butt/Wardwell 190.50mm 152.40mm to 203.20mm in 12.7mm increments Smooth, 26.97mm 10.31mm, 11.20mm, 12.85mm 8 tooth ratchet 2 BDX-EL N E Butt/Wardwell 69.85mm 190.50mm to 330.20mm in 12.70mm increments Smooth, 20.57mm typical 9.78mm or 12.95mm 8 tooth ratchet CP-140 Ratera, Herzog 78.23mm 280.67mm 23.24mm 14.99mm pins & slots CP-3X3 Spirka 78.49mm 80.00mm Smooth, 22.35mm 10.16mm Drive Slot #4-SDF N E Butt/Wardwell 85.73mm 152.40mm to 203.20mm in 12.70mm increments Smooth, 26.97mm typical 10.31mm, 11.20mm, 12.85mm 10 tooth ratchet 3-EL N E Butt/Wardwell 88.90mm 190.50mm to 330.20mm in 12.70mm increments Smooth, 20.57mm typical 9.78mm or 12.95mm 10 tooth ratchet 13" Steeger Steeger 94.49mm 292.10mm Textured, 20.23mm 22.61mm Drive Slot 4 X 4 Spirka 96.82mm 79.38mm Smooth, 31.75mm 9.91mm or 15.88mm Drive Slot #4 Braider N E Butt/Wardwell 101.60mm 152.40mm to 177.80mm in 12.7mm increments Smooth, 26.97mm typical 10.31mm, 11.20mm, 12.85mm 10 tooth ratchet Sashcord Bobbin N E Butt/Wardwell 101.60mm 152.40mm to 177.80mm in 12.70mm increments Smooth, 26.97mm 10.31mm, 11.20mm & 12.85mm 2 Hole Pin Drive #4-EL N E Butt/Wardwell 101.60mm 228.60mm to 406.40mm in 12.7mm increments Smooth, 20.57mm typical 9.78mm or 12.95mm 10 tooth ratchet Jette Spool Herzog 101.60mm 179.38mm Smooth, 26.97mm typical 13.49mm Drive Slot C S Rug Braider N E Butt/Wardwell 116.84mm 177.80mm Smooth, 25.40mm 12.70mm 12 Ratchet teeth CP-224L (Bore or Slot) Herzog 120.90 350.52 35.56 15.62 Bore or Slot Kokobun Rug Kokobun 132.59mm 180.85mm Smooth, 27.94mm 15.75mm 10 tooth ratchet Cop Holder 6RATT N E Butt/Wardwell       8.26mm 6 tooth ratchet Cop Holder 8RATT N E Butt/Wardwell       8.26mm 8 tooth ratchet Cop Holder 8TABT N E Butt/Wardwell       8.26mm 8 tooth tabs Cop Holder #2BDX N E Butt/Wardwell         8 tooth ratchet