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Spool bore holes
Spool bore holes
Objective
To eliminate rings produced in the bore by the rough pass reamer. In the typical process, these rings need to be removed manually prior to finishing/assembly.
Result
- 30-50% reduction in cycle time
- 30-50% reduction in cost per unit
- 30-40% increased productivity
Machining process
Step 1: Pilot reamer
Drawing no. 212851, N = 2000 rpm, Fn = 0.4 mm/rev.
Step 2: Ringfree reamer
Drawing no. 212891, N = 2160 rpm, Fn = 0.35 mm/rev.
Step 3: GROOVING LAND TOOL™
Drawing no. 432355, N = 1990 rpm, Fn = 0.06 mm/rev.
See video on machining cast iron valves
