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Sample Manipulation and Motion > Rotary Motion > Ferro-Magnetic Solid Shafts > 
Thread Mount Solid Shaft – KJLC Standard, Ferro-Magnetic Fluid Rotary Feedthroughs


Thread Mount Solid Shaft – KJLC Standard, Ferro-Magnetic Fluid Rotary Feedthroughs

These Ferro-Magnetic Fluids sealed rotary feedthroughs are sealed to a flat surface by a fluorocarbon o-ring. The operator mounts these drives to the vacuum chamber by screwing them into a corresponding threaded hole, or on some models by placing them in a suitable smooth-sided port in the chamber wall and using a capture nut. Some models are threaded only part way. They will accommodate various wall thicknesses when used with a sleeve or spacer over the unthreaded portion so that the nut compresses the o-ring.

In vacuum practice, the o-ring is compressed against the vacuum chamber's inner surface to limit virtual leaks. As shown in the dimensional drawings, most Ferro-Magnetic Fluid sealed feedthroughs are designed to be installed this way. A few, however, are intended to have the o-ring sealing against the atmosphere side surface. To reduce the virtual leaks associated with the thread, the feedthrough has a flat machined along the length of its threaded portion.

Please refer to the technical notes about loading, temperature, and other relevant information before specifying a feedthrough.

Features

  • Use a special magnetic fluid (ferrofluid) in place of an o-ring seal around dynamic parts
  • Fluid hermetically seals the shaft, making a liquid o-ring while a permanent magnet keeps the fluid in place
  • Ferrofluid magnetically held in stages formed by grooves machined into either the shaft or pole pieces
  • Unlike regular o-rings, the ferrofluid o-ring remains intact for years of operation despite the shaft's motion

Applications

  • Rotary stages
  • Barrels
  • Platens
  • Planetaries
  • Web coater rollers used in thin film deposition and etching processes

Specifications Table

Mounting Water Cooling
(locations)
Shaft O.D. Face Seal
O-Ring
Standard
1-14 UNS-2A Thread *
No
3/4"
O-V128
1-14 UNS-2A Thread *
Yes
(0.89", 1.74")
1/2"
O-V128
1-14 UNS-2A Thread *
No
1/2"
O-V128
1-14 UNS-2A Thread *
Yes
(0.89", 1.74")
3/4"
O-V128
5/16-24 UNF-2A Thread
No
3/16"
O-V012
7/16-20 UNF-2A Thread
No
1/4"
O-V015
Metric
M12 X 1.5 Thread
No
4mm
O-V015
M12 X 1.5 Thread
No
5mm
O-V015
M12 X 1.5 Thread
No
6mm
O-V015
M25 X 1.5 Thread
No
12mm
O-V220
M25 X 1.5 Thread
Yes
12mm
O-V220
M30 X 1.5 Thread
No
30mm
O-V226
M30 X 1.5 Thread
Yes
30mm
O-V226

NOTE: * Supplied with nut and washer.



Dimensional Drawings


Ordering Table

Model Dim
A
Dim
B
Dim
C
Dim
D
Dim
E
Dim
F
PartNo Price Add To
Cart
Model Dim
A
Dim
B
Dim
C
Dim
D
Dim
E
Dim
F
PartNo Price Add To
Cart
Standard (in.)
0.1875"
0.63"
2.562"
1.58"
0.482"
0.28"
KLFDTM018516 $625.00
Standard (in.)
0.25"
0.75"
3.437"
1.937"
0.75"
0.375"
KLFDTM025716 $710.00
Standard (in.)
0.50"
2.87"
8.812"
5.072"
1.25"
1.51"
KLFDTM050114 $940.00
Standard (in.)
0.50"
2.87"
8.812"
5.072"
1.25"
1.51"
KLFDTM050114W $1,300.00
Standard (in.)
0.75"
2.87"
8.812"
5.072"
1.25"
1.51"
KLFDTM075114 $1,240.00
Standard (in.)
0.75"
2.87"
8.812"
5.072"
1.25"
1.51"
KLFDTM075114W $1,420.00

NOTE: * Shaft mount measured 1" from process side face of feedthrough.

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