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Hobs & Form Relived Cutters: Common Sharpening Problems - May/June 1998

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Archive > 1998 > May/June 1998 > Hobs & Form Relived Cutters: Common Sharpening Problems

The article "Hobs & Form Relived Cutters: Common Sharpening Problems" appeared in the May/June 1998 issue of Gear Technology.

Summary
Fig. 1 shows the effects of positive and negative rake on finished gear teeth. Incorrect positive rake (A) increase the depth and decreases the pressure angle on the hob tooth. The resulting gear tooth is thick at the top and thin at the bottom. Incorrect negative rake (B) decreases the depth and increases the pressure angle. This results in a cutting drag and makes the gear tooth thin at the top and thick at the bottom.

Keywords
hobs, cutting tools, tool sharpening, hob sharpening, sharpening, basics, gear fundamentals

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