PTFE Stirrer Guides, Shaft D 8 mm, Joint: ST/NS 24/29, Cowie (CAT#: STEM-L-2499-LKN)

These stirrer guides are for use with glass, metal and PTFE stirrer shafts. A permanently loaded composite PTFE/PEEK seal and a specifically fabricated glass ball-bearing provide rigidity and smoothness operation. A series of types are available to fit standard ground-glass joint.
Note: PEEK has a very high level of chemical resistance with some susceptibility only to strong mineral acids.

High level of chemical resistance.
Anti-whip and reduced vibration.
Vacuum (~5mm Hg) and pressure (3-5psi) performance.
No shedding.
Self-release joint ring.
Maximum recommended speeds: continuous 500rpm, intermittent 800rpm.