Single Groove Sheaves for “4L” “5L” & “B” Belts

BK Sheaves are precision machined from gray cast iron, statically balanced, painted with baked enamel finish and individually packaged. Sheaves are furnished with standard keyways & set screws.
BK_single_groove_sheave
Click on a Part Number below for detail information. Contact us with questions or Request a Quote.

Part Number OD (inch) 4L Pitch 5L+B Pitch Type F (inch) L (inch) P (inch) C (inch) Stock Bores (inch)
BK24 2.40 1.80 2.20 1 13/16 1-1/16 13/32 5/32 1/2, 5/8, 3/4, 7/8
BK25 2.50 1.90 2.30 1 13/16 1-1/16 13/32 5/32 1/2, 5/8, 3/4, 7/8,1
BK26 2.60 2.00 2.40 1 13/16 1-1/16 13/32 5/32 1/2, 5/8, 3/4, 7/8
BK27 2.70 2.10 2.50 2 13/16 1-1/16 13/32 5/32 1/2, 5/8, 3/4, 7/8,1
BK28 2.95 2.20 2.60 2 13/16 1-1/16 13/32 5/32 1/2, 5/8, 3/4, 7/8,1, 1-1/8
BK30 3.15 2.40 2.80 2 13/16 1-1/16 13/32 5/32 1/2, 5/8, 3/4, 7/8, 1
BK32 3.35 2.60 3.00 2 13/16 1-1/16 13/32 5/32 1/2, 5/8, 3/4, 7/8,1, 1-1/8
BK34 3.55 2.80 3.20 2 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8,1, 1-1/8
BK36 3.75 3.00 3.50 2 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 1, 1-1/8
BK40 3.95 3.20 3.70 2 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 1, 1-1/8
BK45 4.25 3.50 4.00 2 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 1, 1-1/8
BK47 4.45 3.70 4.20 2 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 1, 1-1/8
BK50 4.75 4.00 4.40 3 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 1, 1-1/8
BK52 4.95 4.20 4.60 3 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 1, 1-1/8
BK55 5.25 4.50 4.90 3 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-3/16
BK57 5.45 4.70 5.10 3 7/8 1-5/32 13/32 1/8 5/8, 3/4, 7/8, 15/16, 1, 1-1/8
BK60 5.75 5.00 5.40 3 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-3/16
BK62 5.95 5.20 5.60 3 7/8 1-5/32 13/32 1/8 1/2, 5/8, 3/4, 7/8, 15/16, 1, 1-1/8, 1-3/16
BK65 6.25 5.50 5.90 3 7/8 1-5/32 13/32 1/8 5/8, 3/4, 1, 1-1/8
BK67 6.45 6.70 6.10 3 7/8 1-5/32 13/32 1/8 5/8, 3/4, 1, 1-1/8
BK70 6.75 6.00 6.40 3 7/8 1-15/32 21/32 1/16 5/8, 3/4, 7/8, 15/16, 1, 1-1/8, 1-3/16, 1-7-16
BK72 6.95 6.20 6.60 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-1/8, 1-3/8
BK75 7.25 6.50 6.90 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-1/8, 1-3/8
BK77 7.45 6.70 7.10 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-1/8, 1-3/8
BK80 7.75 7.00 7.40 3 7/8 1-15/32 21/32 1/16 5/8, 3/4, 7/8, 1, 1-1/8, 1-3/16, 1-1/4, 1-3/8, 1-7/16
BK85 8.25 7.50 7.90 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-1/8, 1-3/8, 1-7/16
BK90 8.75 8.00 8.40 3 7/8 1-15/32 21/32 1/16 3/4, 7/8, 15/16, 1, 1-1/8, 1-3/16, 1-3/8, 1-7/16
BK95 9.25 8.50 8.90 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-1/8, 1-3/8, 1-7/16
BK100 9.75 9.00 9.40 3 7/8 1-15/32 21/32 1/16 3/4, 7/8, 15/16, 1, 1-1/8, 1-3/16, 1-1/4, 1-3/8, 1-7/16
BK105 10.25 9.50 9.90 3 7/8 1-15/32 21/32 1/16 1, 1-3/8, 1-7/16
BK110 10.75 10.00 10.40 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-1/8, 1-3/16, 1-3/8, 1-7/16
BK115 11.25 10.50 10.90 3 7/8 1-15/32 21/32 1/16 1, 1-3/8, 1-7/16
BK120 11.75 11.00 10.40 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-1/4, 1-3/16, 1-7-16
BK130 12.75 12.00 12.40 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-1/8 1-1/4, 1-3/16, 1-7/16
BK140 13.75 13.00 13.40 3 7/8 1-15/32 21/32 1/16 3/4, 1, 1-3/16, 1-7/16
BK160 15.75 15.00 15.40 3 7/8 1-15/32 21/32 1/16 1, 1-1/8 1-1/4, 1-3/16, 1-7/16
BK190 18.75 18.00 18.40 3 7/8 1-15/32 21/32 1/16 1, 1-1/4, 1-3/16, 1-7/16

AK Sheaves are precision machined from gray cast iron, statically balanced, painted with baked enamel finish and individually packaged. Sheaves are furnished with standard keyways & set screws.

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