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(3) Shaft (D) and Swagelok nut
The shaft (D) is made of titanium alloy. The section sliding with the bearing is coated with
molten tungsten carbide to improve the wear resistance.
The Swagelok nut is made of stainless steel. It fastens the shaft (D) on the cover (see Fig. 4)
Shaft (D) is a critical component. Be careful of handling it so that it is not bent, etc.
(4) Seal tube head and seal
The shaft area of seal tube head is inserted in the (polyphenylene oxide resin). shaft up to
the core, and serves as a passage for sample etc. It is fastened on the shaft with left hand
threads. The material is stainless steel. The seal is mounted on the top of the seal tube head.
It is an important component in charge of letting in and out sample, etc. to and from spinning
rotor. The employed material is polyimid resin whose sealability is excellent at a high
peripheral speed (see Fig. 5 and 6).
Fig. 4 Shaft (D)
Fig. 5 Seal tube head
Fig. 6 Seal