KJLC Solid Shaft Rotary Feedthroughs
(Thread Mount)
These ferrofluid rotary feedthroughs are sealed by a fluorocarbon oring. The operator mounts these drives to the vacuum chamber by
screwing them into a corresponding threaded hole. On some models
the drive’s threaded end is inserted through a suitable diameter hole
in the chamber wall and retained with a 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.
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.
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 ferrofluid feedthroughs are designed to
be installed this way. A few, however, are intended to have the o-ring
sealing against the air surface. To reduce the virtual leaks associated
Features
• Special magnetic fluid in place of an
o-ring seal around dynamic parts
• Unlike typical o-rings, the ferrofluid
remains intact for years of operation
despite the shaft’s motion
Specifications (Imperial Inches)
Part No.
KLFDTM018516
KLFDTM025716
KLFDTM050114
KLFDTM050114W
KLFDTM075114
KLFDTM075114W
Mounting
Water Cooling
Shaft O.D.
Face Seal O-Ring
5/16-24 UNF-2A
7/16-20 UNF-2A
1-14 UNS-2A
1-14 UNS-2A
1-14 UNS-2A
1-14 UNS-2A
No
No
No
Yes
No
Yes
3/16
1/4
1/2
1/2
3/4
3/4
O-V012
O-V015
O-V128
O-V128
O-V128
O-V128
Applications Served
• Rotary stages
• Barrels
• Platens
Dimensions (Imperial inches)
Part No.
KLFDTM018516
KLFDTM025716
KLFDTM050114
KLFDTM050114W
KLFDTM075114
KLFDTM075114W
A
B
C
D
0.1875
0.25
0.50
0.50
0.75
0.75
0.63
0.75
2.87
2.87
2.87
2.87
2.562
3.437
8.812
8.812
8.812
8.812
E
• Planetaries
F
• Web coater rollers used in thin film
deposition and etching processes
1.58 0.482 0.28
1.937 0.75 0.375
5.072 1.25 1.51
5.072 1.25 1.51
5.072 1.25 1.51
5.072 1.25 1.51
Specifications (Metric Millimeters)
Part No.
Mounting
KLFDMTM04M12
KLFDMTM05M12
KLFDMTM06M12
KLFDMTM12M25
KLFDMTM12M25W
KLFDMTM20M30
KLFDMTM20M30W
M12 x 1.5
M12 x 1.5
M12 x 1.5
M25 X 1.5
M25 X 1.5
M30 X 1.5
M30 X 1.5
Water Cooling Shaft O.D. Face Seal O-Ring
No
No
No
No
Yes
No
Yes
4
5
6
12
12
30
30
O-V015
O-V015
O-V015
O-V220
O-V220
O-V226
O-V226
D
Dimensions (Metric Millimeters)
Part No.
A
B
KLFDMTM04M12
KLFDMTM05M12
KLFDMTM06M12
KLFDMTM12M25
KLFDMTM12M25W
KLFDMTM20M30
KLFDMTM20M30W
4
5
6
12
12
20
20
21 76.5
21 76.5
21 76.5
48 179
48 179
63 211
63 211
C
D
E
F
Keyway
46.5
46.5
46.5
109
109
121
121
15
15
15
30
30
35
35
10
10
10
35
35
39
39
N/A
N/A
N/A
2.50
2.50
3.50
3.50
3.970
3.970
5.970
5.970
W
W
W
W
x
x
x
x
A
D
D
D
D
x
x
x
x
20.0
20.0
25.0
25.0
L
L
L
L
E
B
F
C
Kurt J. Lesker Company
800.245.1656
www.lesker.com
[email protected]
Specifications (Metric Millimeters)
Part No.
KLFDMHOF1090
KLFDMHOF1090W
KLFDMHOF20105
KLFDMHOF20105W
KLFDMHOF25120
KLFDMHOF25120W
KLFDMHOF30120
KLFDMHOF30120W
KLFDMHOF40145
KLFDMHOF40145W
KLFDMHOF50160
KLFDMHOF50160W
KLFDMHOF75210
KLFDMHOF75210W
Mounting
Water Cooling
90 Flange
90 Flange
105 Flange
105 Flange
120 Flange
120 Flange
120 Flange
120 Flange
145 Flange
145 Flange
160 Flange
160 Flange
210 Flange
210 Flange
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Shaft O.D.
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
Accepts
10
10
20
20
25
25
30
30
40
40
50
50
75
75
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
(-0.01
/
/
/
/
/
/
/
/
/
/
/
/
/
/
-0.03)
-0.03)
-0.03)
-0.03)
-0.03)
-0.03)
-0.03)
-0.03)
-0.03)
-0.03)
-0.03)
-0.03)
-0.04)
-0.04)
Face Seal O-Ring
Inner O-Ring
O-V223
O-V223
O-V226
O-V226
O-V229
O-V229
O-V232
O-V232
O-V235
O-V235
O-V238
O-V238
O-V250
O-V250
O-V012
O-V012
O-V019
O-V019
O-V022
O-V022
O-V025
O-V025
O-V129
O-V129
O-V135
O-V135
O-V149
O-V149
KJLC Solid Shaft Rotary Feedthroughs
(Baseplate Mount)
These ferrofluid rotary feedthroughs are sealed by a fluorocarbon o-ring. The operator
mounts these drives to the vacuum chamber by placing them in a suitable smooth-sided port in
the chamber wall, using a capture nut to secure the unit. 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 ferrofluid feedthroughs are designed to be installed this way. A few,
however, are intended to have the o-ring sealing against the air surface. To reduce the virtual
leaks associated with the thread, the feedthrough has a flat machined along the length of its
Specifications (Imperial Inches)
Part No.
Mounting
Shaft O.D.
Face Seal O-Ring
3/4" BP
1" BP
1" BP
1.5" BP
1" BP
1.5" BP
1/4"
1/4"
3/8"
3/8"
1/4"
1/4"
O-V026
O-V026
O-V026
O-V132
O-V026
O-V132
KLFDBP02575
KLFDBP02510
KLFDBP03710
KLFDBP03715
KLFDBP02510E
KLFDBP02515
KLFDBP02575
KLFDBP02510
KLFDBP03710
KLFDBP03715
KLFDBP02510E
KLFDBP02515
A
B
C
D
E
F
0.25
0.25
0.375
0.375
0.25
0.25
1.625
1.625
1.625
2.12
1.62
2.25
3.437
3.437
3.39
3.97
3.125
3.85
1.93
1.93
1.65
2.47
1.625
2.35
0.75
0.75
0.87
0.75
0.75
0.75
1.68
1.68
1.3
2.22
1.375
2.1
Part No.
Mounting
Shaft O.D.
Face Seal O-Ring
32 BP
38 BP
6
10
P35
P41
KLFDMBP0632
KLFDMBP1038
F
C
Specifications (Metric Millimeters)
Dimensions (Metric Millimeters)
Part No.
A
B
C
D
E
F
KLFDMBP0632
KLFDMBP1038
6
10
55
60
97.5
119.5
57.5
69.5
20
25
47.5
59.5
E
B
A
Dimensions (Imperial Inches)
Part No.
D
KJLC Solid Shaft Rotary Feedthroughs
(CF Flanged)
Designed to provide rotary motion under high vacuum, these ferrofluid
feedthroughs have ConFlat-compatible (CF) mounting flanges. Normal helium leak
detectors capable of detecting 1 x 10-11 std cc/sec of Helium flow detect no leakage for
CF mounts under static and dynamic testing. CF flanged rotary motion feedthroughs
routinely operate in the 10-6 torr range and, when properly prepared & installed, may be
used to mid 10-10 torr.
Specifications (Imperial Inches)
Part No.
KLFDCF025133
KLFDCF025275
KLFDCF025275W
KLFDCF037275
KLFDCF037275W
KLFDCF050275
Mounting
1.33
2.75
2.75
2.75
2.75
2.75
CF
CF
CF
CF
CF
CF
Shaft O.D.
Shaft O.D.
No
No
Yes
No
Yes
No
1/4
1/4
1/4
3/8
3/8
1/2
D
E
Dimensions (Imperial Inches)
Part No.
KLFDCF025133
KLFDCF025275
KLFDCF025275W
KLFDCF037275
KLFDCF037275W
KLFDCF050275
A
B
C
D
E
0.25
0.25
0.25
0.375
0.375
0.5
0.75
1.5
1.5
1.5
1.5
2.375
3.25
4.06
4.06
4.06
4.56
8.656
1.75
2.56
2.56
2.56
3.06
4.906
0.75
0.75
0.75
0.75
0.75
1.25
A
B
C
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KJLC Solid Shaft Rotary Feedthroughs
(O-Ring Flanged)
These ferrofluid rotary feedthroughs are sealed by a fluorocarbon o-ring. The
operator mounts these drives to the vacuum chamber 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 ferrofluid
feedthroughs are designed to be installed this way. A few, however, are intended to have
the o-ring sealing against the air surface. To reduce the virtual leaks associated with the
thread, the feedthrough has a flat machined along the length of its threaded portion.
D
E
Dimensions (Imperial Inches)
Part No.
KLFDOF05060
KLFDOF05060W
KLFDOF05070W
KLFDOF07550W
KLFDOF07560
KLFDOF10060W
Mounting
6.00
6.00
7.00
5.00
6.00
6.00
Water Cooling
Shaft O.D.
Face Seal O-Ring
No
Yes
Yes
Yes
No
Yes
1/2
1/2
1/2
3/4
3/4
1
O-V234
O-V234
O-V351
O-V337
O-V234
O-V340
Flange
Flange
Flange
Flange
Flange
Flange
A
B
C
Specifications (Imperial Inches)
Part No.
KLFDOF05060
KLFDOF05060W
KLFDOF05070W
KLFDOF07550W
KLFDOF07560
KLFDOF10060W
A
0.50
0.50
0.50
0.75
0.75
1.00
B
C
2.87 6.03
2.87 6.03
5.00 16.32
3.00 9.39
2.87 6.03
4.00 12.625
D
E
Bolt Holes
Keyway
3.56
3.56
6.00
4.88
3.56
5.38
1.22
1.22
4.32
1.84
1.25
3.00
(4) x 0.75 OD on 4.75 BC
(4) x 0.75 OD on 4.75 BC
(6) x 0.406 OD on 6.00 BC
(6) x 0.406 OD on 6.00 BC
(4) x 0.75 OD on 4.75 BC
(6) x 0.406 OD on 5.00 BC
0.126 W x 0.077 D x 1.00 L
0.126 W x 0.077 D x 1.00 L
0.375 W x 0.210 D x 3.38 L
0.188 W x 0.114 D x 1.00 L (2.00 L Vac S)
0.188 W x 0.114 D x 1.00 L
0.250 W x 0.141 D x 2.50 L (3.50 L Vac S)
Specifications (Metric Millimeters)
Part No.
KLFDMOF0680
KLFDMOF1080
KLFDMOF1290
KLFDMOF20105
KLFDMOF30160
Mounting
Shaft O.D.
Face Seal O-Ring
80 Flange
80 Flange
90 Flange
105 Flange
160 Flange
6
10
12
20
30
O-V214
O-V217
O-V220
O-V226
O-V346
Dimensions (Metric Millimeters)
Part No.
A
B
C
D
E
Bolt Holes
KLFDMOF0680
KLFDMOF1080
KLFDMOF1290
KLFDMOF20105
KLFDMOF30160
6
10
12
20
30
38
44
48
63
105
97.5
119.5
133.5
151.5
321
57.5
69.5
73.5
81.5
141
20
25
30
35
90
(4) x 10 OD on 60 BC
(4) x 10 OD on 60 BC
(4) x 10 OD on 70 BC
(4) x 10 OD on 85 BC
(6) x 12 OD on 135 BC
Keyway
2.984
3.970
5.985
9.964
W
W
W
W
x
x
x
x
N/A
1.85
2.50
3.55
5.00
D
D
D
D
x
x
x
x
14.0
20.0
25.0
80.0
L
L
L
L
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