B11-12B1T025IN0650/55 - British Std. SIMPLEX (Steel) Sprocket TAPERBORED (NORMAL Fit - Boss Side) 12B-1 (3/4" Pitch x 7/16") x 25 teeth - with Induction Harden Teeth to 50/55 HRC for 1610

B11-12B1T025IN0650/55 - British Std. SIMPLEX (Steel) Sprocket TAPERBORED (NORMAL Fit - Boss Side) 12B-1 (3/4" Pitch x 7/16") x 25 teeth - with Induction Harden Teeth to 50/55 HRC for 1610 This range of Shaft Ready Simplex Sprockets was originally developed from the experience gained servicing the demand for Finished Machined sprockets for the replacement market. However since its introduction, this range has proved so popular that the company has been able to increase its production volumes, and in turn enabled it to reduce its unit cost to make it a very competitive alternative to reworking a pilot bore sprocket for the small to large volume OEM user.