A wide hub provides these sprockets with stability under heavy loads. Designed to rotate freely on built-in bearings, idler sprockets maintain constant tension on your drive by pressing against your chain to take up slack and reduce wear and vibration. They are for use with roller chain tensioners. Bearings are self-lubricating.
Bearing
Number
of Teeth For Shaft
Dia. OD Overall
Wd. Hub Dia. Material Type Material Each
For ANSI 35 Roller Chain (3/8" Pitch)
15 1/2" 1.99" 15/16" 1 23/64" Steel Sleeve Bronze 6663K81 $34.34
21 7/8" 2.71" 1 1/16" 2" Steel Sleeve Bronze 6663K82 45.81
For ANSI 40 Roller Chain (1/2" Pitch)
13 1/2" 2.33" 15/16" 1 9/16" Steel Sleeve Bronze 6663K85 49.44
19 7/8" 3.29" 1 1/16" 2 1/2" Steel Sleeve Bronze 6663K86 64.41
For ANSI 50 Roller Chain (5/8" Pitch)
13 1/2" 2.91" 15/16" 1 7/8" Steel Sleeve Bronze 6663K87 48.38
17 7/8" 3.72" 1 1/16" 2 5/8" Steel Sleeve Bronze 6663K88 72.44
For ANSI 60 Roller Chain (3/4" Pitch)
15 7/8" 3.98" 1 1/16" 2 5/8" Steel Sleeve Bronze 6663K89 91.31
17 1 1/8" 4.46" 1 9/16" 3 1/4" Steel Sleeve Bronze 6663K91 122.72
For ANSI 80 Roller Chain (1" Pitch)
15 1 1/8" 5.3" 1 9/16" 3 1/2" Steel Sleeve Bronze 6663K92 151.03
