Hypodermic Tube Beveling


Hypodermic tube beveling is a metalworking process in which stainless steel tubing is worked through tube drawing and beveling to create hypodermic needles. These needles, when finished, can be used in several mediums, from sports to medicine, and come in both disposable and non-disposable forms. You might be surprised as to how easy it is to take a length of metal tubing and form the most common implement used everywhere today.

Curious as to how the many products created by hypodermic tube beveling could enhance your business? Contact any one of our expert tubing specialists today for a complete breakdown of available options.

Phase One: Tube drawing
The first step in the hypodermic tube beveling process is a metalworking discipline known as tube drawing. Tube drawing takes lengths of stainless steel tubing of one diameter, softens it, and draws it through a series of dies, each one smaller than the last. As the tubing passes through each die, it is reformed into new lengths, with a smaller diameter each time.


There are five types of tube drawing used in industry today: tube sinking, mandrel drawing, stationary mandrel, moving mandrel, and floating mandrel. A mandrel is a tool that basically keeps the tubes from developing wrinkles or buckling marks while they are being processed. The overall effect on the finished product after tube drawing is nothing short of amazing. It possesses a quality surface finish, superior tensile strength, and is the best way to precisely create a custom diameter, with precise dimensions.


Phase Two: Beveling
Done by hand, or through the use of an automated beveling machine, beveling creates angles on one end of a metal tube that will form the hypodermic needle point. The point consists of three angles: the primary, which is usually the longest angled edge, and two side bevels, which are done on each side of the primary. These two form the actual needle point, and give it a cutting edge for piercing use.

Depending on the desired length of the needle, the secondary bevels can be ground at any angle to form the desired point, determined by the desired needle gauge. There are two common numerical systems currently in use for needle gauging, the Stubs Needle Gauge, and the French Catheter Scale. The ones most commonly in use for medical purposes is the Stub gauge, with 7 being the largest diameter, and 33 being the smallest.


The Finished Product
The finished product from hypodermic tube beveling will consist of the needle point, the needle length, and the heel. The heel end of the tube has a larger diameter than the needle end, and this is where the hub rings will be attached. The hub rings allow the needle to be attached to the actual hypodermic into which liquid medium will be drawn into, and then expelled through injection.


Summary
One of the most commonplace items in the world today is the needle. The process which creates it, hypodermic tube beveling, is an amazing process where metal tubing is drawn, reduced and ground to create it.