carbide gear hob / monobloc
Fratelli Vergnano S.r.l.
In certain particular applications the use of solid carbide hobs is advantageous compared to PM steels hobs. For example,
when it is necessary to use cutting speeds higher than to 350 - 400 m/min. when small modules are required or in other
extreme applications which cannot be covered by steel hobs. In particular, when hobbing tempered steel components solid
carbide hobs are the only possible choice.
In order to broaden the product range and satisfy the customer's needs. Vergnano has installed a dedicated production line for
solid carbide hobs. Carbide substrate type and coating can thus be optimised in relation to each specific application.
For hobs, two different solid carbide types are employed: grade "K" and grade "P". both of which offered by Vergnano. Each
grade can have different compositions depending on its final use.
Grade "K" hobs, mostly used for large scale production, must be recoated after being resharpened. whereas grade *P" hobs
can be used after resharpening without recoating and are therefore more suitable for numerous, small production lots.