Cam Adjustable Internally Synchronized Three Die Spline Rolling Heads
Synchronized spline rolling heads are used to roll precision parts which must fit with a mating part. They are also used where the length of the part would cause excessive deflection when rolling from one side. A synchronizing mechanism is needed when more than one straight die is used to prevent mis-tracking and minimize spacing error. Mis-tracking is when rolling dies produce the wrong number of teeth (often twice as many as desired). Spacing error is when the distance from tooth to tooth varies, causing mating parts not to fit together.
The synchronizing gear aligns the teeth on each rolling die in relation to the others. When rolling the synchronizing gear is pushed back into the head. When the part is retracted, a spring returns the synchronizing gear to its original position.
The cam adjustable type allows the three dies to be adjusted with a single adjustment, making setup easier than heads with independent adjustment.
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Accu Trak Knurling Tools are manufactured to extremely high standards from premium alloys. Many are available with a lapped tooth form to give longer life and impart a smooth, clean surface to the knurled part. Both sides and the bore of the knurl are finish ground to maintain close tolerance on diameter and side runout. Our standard material is a high quality grade of High Speed steel which is vacuum hardened, and tempered at least 2 times to a hardness of about 63 Rockwell C.
For severe knurling operations, such as rolling on 303 stainless or semi-hardened steels, Accu Trak also offers knurls in a premium grade of high-cobalt steel. These knurling tools are slightly harder and in most applications deliver a substantial increase in tool life. Multiple coatings such as "TiN" and "Ferritic Nitrocarburizing" are also available if necessary. Our sales representatives will be happy to discuss any aspect of your knurling application and make recommendations on maximizing tool life versus cost for any type of knurling operation.
In addition to the many stock knurling dies shown above, we can manufacture virtually any size and pitch special knurling tools with 1-2 week normal delivery for standard knurl tooth forms.