In recent years router bit technology has come a long way and even the humble straight bit has progressed. Watch the video below to see the advantages of using a spiral router bit in place of a straight bit.
In everyday use most woodworkers are likely to benefit from the advantages of an up-cut spiral bit – they’re ideal for efficient chip ejection when cutting mortises, dado cuts and deep blind holes – compared to the more specialist applications that require a down-cut spiral bit.
Freud make some of the best router bits around and have a quality 5 piece up-cut spiral set – the Freud 90-150 shown below which includes 3/16″, 1/4″, 3/8″, 5/16″ and 1/2″ cutters for an excellent price of just over $150. At just over $30 per bit, they’re almost as cheap as straight bits, and the box is handy to keep them organized (just remember not to drop them on a concrete floor seeing as they’re made of solid carbide):