Non-contact seals in CF design

Non-contact seals series CF are specifically designed for spindle bearings and offer highest efficiency with absolutely leak tightness within a minimized space of 6 mm width only.

The labyrinth design is a combination of gaps in axial and radial direction in five steps. The axial gaps are shielding while the radial gaps are providing back transport. A catching groove improves the seal efficiency – even without any shaft rotation.

The option of saving sealing air and increased maintenance intervals are offering a considerable commercial progress and advantage.

 

CF design for spindle ball bearings

Series CF 60 … S10

GMN non-contact seals Type CF 60 and CF 619 are produced according to the dimensions of ball bearing rows 60 and 619. They are made of steel, hardened and face-ground. The spindle bearing is pre-loaded directly through the CF seal’s inner ring

 

Technical data
  • Material: Steel
  • Hardness: HRC  ≥ 45
  • Plane-parallelism: ≤ 5 μm
  • Range of temperature: -40 °C – 170 °C
  • Speed limit: no limit
  • Series 60 diameter: 20 – 100 mm
  • Series 619 diameter: 40 – 80 mm
  • Width: 6 mm for all sizes
  • Gap seal: CF-Profile
  • Axial clearance: Sax = 1 mm
  • Radial clearance: Srad = 0,5 mm
CF_550x550
Labyrinthdichtung_TZ
Component tolerances:
  • Width W = 6 mm (0/-20 µm)
DI_CF_Bauteiltoleranzen_ENG_935x480

Characteristics

  • Installation-friendly

No adaptation of the connecting parts (other diameters or tolerances, hardnesses, shaft collar, etc.) required; can be installed directly next to the spindle bearing “sandwiched” between bearing and shaft nut

  • Insensitive to temperature

For operating temperatures up to 170 °C

  • Resistant

The hardened material is extremely resistant to abrasive particles and chips

  • Frictionless

Non-contact design of the inner and outer ring

  • Wear-free

Unlimited service life

  • Abrasion-free

Fulfills the highest cleanliness requirements

  • Unlimited speeds

No axial movement between the spindle bearing and shaft nut

  • Heat-free

No thermal stress for the seal and adjacent components

  • Efficient

Smooth operation with no performance losses fulfills the highest ecological and economical requirements

  • Compact

Narrow structural width of 6 mm for all shaft diameters enables space-saving solutions

  • Effective

High sealing effect against heavy spray loads over a large speed range – including when the shaft is at a standstill

CF 60, 20 - 45 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter e1
e1
[mm]
Gap diameter e2
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
CF 6004 S10
20
42
6
28
38
1
unlimited
0.051
307082
CF 6005 S10
25
47
6
33
43
1
unlimited
0.059
307085
CF 6006 S10
30
55
6
39
49
1
unlimited
0.079
307089
CF 6007 S10
35
62
6
45
55
1
unlimited
0.097
307093
CF 6008 S10
40
68
6
50
60
1
unlimited
0.113
307097
CF 6009 S10
45
75
6
55
65
1
unlimited
0.134
307101

CF 60, 50 - 70 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter e1
e1
[mm]
Gap diameter e2
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
CF 6010 S10
50
80
6
60
70
1
unlimited
0.145
307105
CF 6011 S10
55
90
6
67
77
1
unlimited
0.189
307109
CF 6012 S10
60
95
6
72
82
1
unlimited
0.202
307113
CF 6013 S10
65
100
6
77
87
1
unlimited
0.215
307117
CF 6014 S10
70
110
6
83
93
1
unlimited
0.268
307121

CF 60, 75 - 100 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter e1
e1
[mm]
Gap diameter e2
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
CF 6015 S10
75
115
6
89
99
1
unlimited
0.283
307125
CF 6016 S10
80
125
6
94
104
1
unlimited
0.343
307129
CF 6017 S10
85
130
6
100
110
1
unlimited
0.36
307133
CF 6018 S10
90
140
6
107
117
1
unlimited
0.428
307137
CF 6019 S10
95
145
6
112
122
1
unlimited
0.447
307141
CF 6020 S10
100
150
6
117
127
1
unlimited
0.465
307145

CF 619, 40 - 55 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter e1
e1
[mm]
Gap diameter e2
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
CF 61908 S10
40
62
6
48
58
1
unlimited
0.084
307149
CF 61909 S10
45
68
6
53
63
1
unlimited
0.097
307153
CF 61910 S10
50
72
6
58
68
1
unlimited
0.1
307157
CF 61911 S10
55
80
6
63
73
1
unlimited
0.126
307161

CF 619, 60 - 80 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter e1
e1
[mm]
Gap diameter e2
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
CF 61912 S10
60
85
6
68
78
1
unlimited
0.135
307165
CF 61913 S10
65
90
6
73
83
1
unlimited
0.144
307169
CF 61914 S10
70
100
6
80
90
1
unlimited
0.19
307173
CF 61915 S10
75
105
6
85
95
1
unlimited
0.201
307177
CF 61916 S10
80
110
6
90
100
1
unlimited
0.212
307181

CF design for deep groove ball bearings

Series CF … A0

For effective sealing of standard deep groove ball bearings, GMN labyrinth seals in the design CF … A0 are produced from aluminum with unground flat surfaces in the dimensions of bearing series 62.

 

Technical data:
  • Material: Aluminum
  • Temperature range: -40 °C – 200 °C
  • Design: Main dimensions (shaft/hub) identical to roller bearings series 62
  • Shaft diameter: 10 – 50 mm
  • Width: constant 6 mm
  • Gap seal : CF profile
  • Axial play: Sax = 1 mm (entire axial movement)
  • Radial play: Srad = 0.5 mm (entire radial movement)
  • Connecting parts: Shaft k5 / hub J6
Labyrinthdichtung_TZ

Characteristics

  • Insensitive to temperature

For operating temperatures up to 200 °C

  • Suitable for high speeds

Low mass of the inner ring with rotating shaft

  • Frictionless

Non-contact design of the inner and outer ring

  • Wear-free

Unlimited service life

  • Abrasion-free

Fulfills the highest cleanliness requirements

  • Heat-free

No thermal stress for the seal and adjacent components

  • Efficient

    Smooth operation with no performance losses fulfills the highest ecological and economical requirements

  • Compact

    Narrow structural width of 6 mm for all shaft diameters enables space-saving solutions

  • Effective

    High sealing effect against heavy spray loads over a large speed range – including when the shaft is at a standstill

  • Installation-friendly

    No adaptation of the connecting parts (other diameters or tolerances, hardnesses, shaft collar, etc.) required

CF 62, 10 - 25 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter e1
e1
[mm]
Gap diameter e2
e2
[mm]
Axial clearance
Sax
[mm]
max. Speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
CF 6200 A0
10
30
6
17
27
1
66420
0.01
306787
CF 6201 A0
12
32
6
19
29
1
54330
0.011
306791
CF 6202 A0
15
35
6
22
32
1
46100
0.013
306795
CF 6203 A0
17
40
6
25
35
1
50200
0.017
306799
CF 6204 A0
20
47
6
29
39
1
45580
0.023
306803
CF 6205 A0
25
52
6
34
44
1
36570
0.026
306807

CF 62, 30 - 50 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter e1
e1
[mm]
Gap diameter e2
e2
[mm]
Axial clearance
Sax
[mm]
max. Speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
CF 6206 A0
30
62
6
42
52
1
32270
0.037
306811
CF 6207 A0
35
72
6
48
58
1
28090
0.05
306815
CF 6208 A0
40
80
6
54
64
1
24810
0.061
306819
CF 6209 A0
45
85
6
58
68
1
21980
0.066
306823
CF 6210 A0
50
90
6
63
73
1
19810
0.071
306827

Specific installation instruction CF

Positioning of the labyrinth

The larger sealing gap diameter (e2) faces the impact side.

DI_Gr_Montage11_550x550
Blindbild_2x550

Installation directly on the spindle bearing

The CF seal is hardened and ground plane parallel in the CF … S10 design. The seal is installed in direct contact with the spindle bearing. The bearing preload can be transferred directly onto the bearing via the seal.

DI_EN_MO_3_550x550
Blindbild_2x550

Freestanding installation

The inner and outer ring are pressed in together with an installation aid. This means that both rings are positioned centrally to each other and are not touching or in contact. The CF seal is positioned free-standing next to the bearing. No axial fixing is required (press fit). For higher speed requirements, the press fit to the shaft can be increased where necessary.

DI_Gr_Baufromen_CF_nr7_750x545.jpg
Blindbild_2x550