Clean Cut Premium Graphtec Compatible 3 pack CB15U 60 degree. US made carbide brazed to a harden steel blank and are polished to a micro fine cutting edge. This Graphtec is a 60° blade and is good with thicker materials, small hard to cut letters, and detailed work. Clean Cut Blades are known to be sharper and last longer than OEM or the less expensive Chinese blades.This blade fits: Graphtec, Sign Jet Pro, Nova Cut, Vinyl Express. Graphtec CB15U-K30 equivalent.
1.5mm blades fit Graphtec red tip or red top blade holders. Fits newer blade holders with built in springs. For blade holders without built in springs, reusing existing springs is required.
The primary rationale for blades of different angles is cutting depth. A lower angle (45 degree) is great for thin materials, while a steeper angle (60 degrees) has a more vertical cutting orientation that penetrates deeper.
An increased amount of blade dragging through the material when cutting fine detail can cause, what they call, vinyl ears (parts lifted up). With minimal blade in the material, a 60 degree blade tends to cause fewer, if any, vinyl ears.
Using a 60 degree blade on everyday cutting is a waste of a blade, technically speaking. Less of the blade's cutting area is used, and blade life is wasted. The more horizontal cutting orientation of the 45 degree blade accurately distributes the cutting task over a larger blade area, and thus last longer (and is cheaper). So use a 45 degree blade always, unless a 60 degree blade is needed for thick or more custom types of cutting, if 45 degrees blades are not available.