hole boring for big spiral bevel gear

Boring refers to the further processing of forging, casting or drilling holes. Boring can enlarge the hole diameter, improve the accuracy, reduce the surface roughness, and can better correct the deviation of the original hole axis.

Boring can be divided into rough boring, semi-fine boring and fine boring. The dimensional accuracy of fine boring can reach IT8～IT7, and the surface roughness Ra value is 1.6～0.8μm.
Boring is divided into general boring and deep hole boring. Generally, boring can be done on an ordinary lathe, and the boring tool can be fixed on the tailstock of the lathe or on a small tool holder. Deep hole boring requires a special deep hole drilling and boring machine, the boring tool must be boring, and the hydraulic pump station uses coolant to remove iron filings.

you can find more information about broaching keyway under below website :

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