42 (ISO 08B)

Metric Standard Sprockets

A stocked pre-Bored sprocket includes a Standard Finished Bore to h8 Tolerance Plus a Standard Keyway and two standard set screw over keyway and at 90º (Unless indicated differently)

If a standard bore size is not in stock the cost to Bore Keyway and setscrew is $110 (large heavy sprockets may be slightly more)

DIN 8187

ISO 606 B

BS 228

Part Number Example:

42B34

42 = Single Strand Ametric® Sprocket

(2042 = Double Strand Ametric® Sprocket)

(3042 = Triple Strand Ametric® Sprocket )

(1/2 Inch Pitch x 5/16 Inch Tooth Width to European/British Standard)

08 B ISO Roller Chain Sprocket

B = With Hub (A = No Hub)

34 = 34 teeth

(34H = 34 Hardened Teeth -- See Flame Hardened Section)

(34SS = 34 Teeth Stainless Steel -- See Stainless Steel Section)

34PM = 34 Teeth Plastic Molded -- See Plastic Injection Molded Section)
PDF - Sprockets-MetricBSMinimumplainbore.pdf