What is the pitch of a knurl?
There are two pitch systems for specifying tooth spacing on a knurl. Circular pitch is based on the distance between the teeth per inch (TPI). It is measured along the wheel from one tooth point to the next. Diametral pitch is based on the number of teeth per inch of the wheel’s diameter.
How do you calculate knurl TPI?
Divide the number of cutting teeth on the wheel by the blank circumference of the wheel in inches to find the number of teeth per inch (TPI). For example, if a wheel with a blank circumference of 6.28 inches has 157 teeth, it has 25 TPI. Divide 1.000 by the TPI of the knurl to calculate the knurl’s circular pitch.
What are typical knurl sizes?
Knurls can be supplied in various types, in either circular or diametral pitch, to suit individual requirements. The four diametral pitches available are 64, 96, 128 and 160. A large variety of knurl blanks are regularly carried in stock, insuring fast delivery on special knurls made to customer’s specifications.
What RPM should be used for knurling?
For convenience, Knurling is often performed at the same speeds used for turning operations when using high speed steel tool bits. But to prevent seizing of the rolls on the pin, we recommend a maximum surface speed of about 150 SFPM (Feet/Min) or 50 m/min.
What is a 96 DP Knurl?
American Standard ANSI B94. 6-1984 describes the diametral pitch knurl system. The number of teeth that will be rolled can be easily determined by multiplying the blank diameter by the Diametral Pitch of the knurl. Example: A 96 D.P. knurl will roll 96 x 1/2 = 48 teeth on a 1/2″ diameter stock.
How many types of knurling are there?
There are two different types of knurling process: cut knurling and form knurling.
What are knurling tools?
Knurling tools are used for producing straight, diagonal or diamond patterns, having teeth of uniform pitch on cylindrical surfaces.
What is a 96 DP knurl?
What is a straight knurl?
Knurling is a manufacturing process, typically conducted on a lathe, whereby a pattern of straight, angled or crossed lines is rolled into the material.
What is the knurling pattern?
What are the dimensions of a knurl pitch?
Knurls are dimensioned in accordance with ANSI B94.6 and are used to provide a rough surface for gripping, decoration, or for a press fit between mating parts. Types of knurls are diamond, straight and diagonal. Standard pitches are 64, 96, 128 and 160.
What is the knurling depth of a Knurl wheel?
Knurling Depth is: .050” x .035% =.0175” per side Metric Example: Knurling Depth of 2mm Knurl Knurling Depth is: 2mm x .035% =.7mm per side – If the knurl double tracks, the knurl wheel is not deep enough in to workpiece, increase knurling depth – If the knurl crest rolls over, the knurl wheel is to deep in to the workpiece, decrease
What is the formula for diametral pitch knurling dies?
Blank diameters for diametral pitch knurling dies are more easily computed, since they are always common fractional sizes. The formula is as follows: Blank Diameter = (#Teeth [part] / Diametral Pitch) American Standard ANSI B94.6-1984 describes the diametral pitch knurl system.
What are the different types of knurled features?
Dimensioning Knurled Features Drawings. Knurls are dimensioned in accordance with ANSI B94.6 and are used to provide a rough surface for gripping, decoration, or for a press fit between mating parts. Types of knurls are diamond, straight and diagonal. Standard pitches are 64, 96, 128 and 160.