Typical Cannula Point Styles > Needles, Luers & Adapters
Cannulas are stainless steel
tubes with a blunt back (proximal) end and a pointed / machined "business" (distal)
end. Blanks are blunt on both ends. Needles (assemblies) are produced
by joining cannula to hubs (fittings). The following diagram illustrates
typical end configurations and within process capabilities, a wide range
of custom profiles can be produced on stock or custom tube.
Highest quality tubing is critical for successful cannulas
and needles. T.I.G. welded and plug drawn, full hard temper tubing maximizes
the rigidity, tensile strength and finishes of cannula. Furthermore, this manufacturing
process is essential for best quality parts when cannulae undergo second operation
cold working such as swaging, bending, flaring, diameter grinding or forming.
Common Point Styles of Cannulas
1) Bias Grind - A single grind or
cut point.
Example: Oiling Bevel, 45° ref.
2) Vet Point- Sharpened
on the lumen sides, this needle is primarily used for life science
and industrial applications. (commonly known as lab point style #4)
Standards: Regular (A) Bevel: 12-15°, Short (B) Bevel: 18-20°,
Quincke (C) Bevel: 25-30°
3) Lancet Point - Automated machine ground. Sharpened on lumen front. Consistent geometry and long run cost effectiveness. Various angles available.
4) Deflected point (Anti-Coring) - Used primarily to reduce coring during septum penetration. Huber point primary bevel is deflected behind the lumen to approximately parallel with the longitudinal axis. A "lab point style #2" deflection is bent in the lumen. Please call regarding process limitations.
5) Pencil Point - Rotary swaged to a minimal flat then hand sharpened and polished. Please call regarding process limitations.
6) Closed End Consistent Wall - Consistent wall closure at end via spinning and welding.
7) Welded "Ball" End - Cross section diagram reveals that welding process produces a spherical closed end.
8) Bullet Point - Tapered , non-sharp point. This point is also offered as a swaged reduction without complete closure at the end
9) Razor Edge - Proprietary technology provides vastly superior edge, used for biopsies & precision dispensing
10) Probe Point (Blunt End) - 90° cut at end of cannula (commonly known as lab point style #3)
11) Trocar - Three faces form a sharp point. Two piece welded assembly in tubing is typical.
© 2004 Vita Needle Company, Inc. • 919 Great Plain Avenue • Needham, MA 02492
Phone: 781-444-1780 • Fax 781-444-3956 • Email: sales@vitaneedle.com
