Labyrinth metal seal

Metallic materials of GMN seal components series L/M guarantee highest resistance against coarse and fine contamination.

Metallic materials are suitable for temperatures up to 200 °C.

 

DI_BF_LM_M30_821x550

Series L/M

Design L

The L design is particularly suited for use with normal spray load for rotating shafts and hubs.

 

Technical data:
  • Outer ring: Aluminum (GD AlSi 12)
  • Inner ring: Non-alloy steel
  • Range of temperature: -40 °– 200 °C
  • Shaft diameter: 15 – 210 mm (customized solutions until max. 270 mm)
  • Width: 10, 14, 15, 20, 22 mm (depending on size)
  • Gap height: Constantly 0.2 – 0.5 mm (depending on size)
  • Sealing gap: Horizontal
  • Axial play: Sax see table of dimensions (total axial movement from one end position to the other)
  • Increased axial clearance: Sax – 1.5 x Sax (on request all types are also available with increased axial play) order name: L dxDxB with increased axial play
  • Radial clearance: Srad = Sax /tan (42.5°)
DI_BF_LM_1
DI_BF_LM_2

Design M with drainage groove

The M design has grooves on the circumference which are used to remove and return penetrated liquid during heavy and direct spray impact.

Technical data:

The technical data for the M design is the same as for the L design.

DI_BF_LM_3
DI_BF_LM_4

Characteristics

  • Frictionless

Thanks to their non-contact design, GMN labyrinth seals guarantee completely frictionless operation.

  • Wear-free

GMN seal components work completely wear-free and offer an unlimited service life.

  • Abrasion-free

The non-contact design of GMN seal components guarantees operation free from metal abrasion that fulfills the highest cleanliness requirements.

  • Effective

The small distance between the outer and inner ring of just approx. 0.2–0.5 mm guarantees a high sealing effect and highly effective protection from fouling.

  • Heat-free

Because no friction heat is generated, neither the seal nor the adjacent components or the lubricant are subjected to thermal loads.

  • Efficient

The frictionless design enables operation without performance losses. This means that the seal offers maximum sealing effect with reduced energy consumption even at high speeds.

  • Compact

GMN labyrinth seals achieve 2–4-layered labyrinths in the smallest space.

  • Effective

The low gap height creates an air cushion in the sealing gap at high circumferential speeds that increases the sealing effect.

  • Return

Drainage grooves on the outer ring return any penetrated liquids (M design).

15 - 20 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 15 X 26 X 8/3
15
26
8
24
0.5
63500
0.0152
301172
L 18 X 28 X 10
18
28
10
26
0.38
63500
0.0171
301176
L 18 X 28 X 10/3
18
28
10
26
0.38
56500
0.0171
301177
L 20 X 28 X 10
20
28
10
26
0.38
81000
0.0124
301178
L 20 X 28 X 10/3
20
28
10
26
0.57
81000
0.0124
301179
L 20 X 30 X 10
20
30
10
28
0.38
70500
0.0187
301180
L 20 X 30 X 10/3
20
30
10
28
0.6
70500
0.0187
301181

22 - 32 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 22 X 30 X 10
22
30
10
28
0.38
71000
0.0135
301182
L 22 X 30 X 10/3
22
30
10
28
0.57
71000
0.0135
301183
L 25 X 37 X 10
25
37
10
34
0.38
50500
0.0283
301185
L 25 X 37 X 10/3
25
37
10
34
0.5
50500
0.0283
301186
L 28 X 39 X 10
28
39
10
36
0.38
45500
0.0268
301187
L 28 X 39 X 10/3
28
39
10
36
0.8
45500
0.0268
301188
L 30 X 42 X 10
30
42
10
39
0.38
48500
0.0331
301189
L 30 X 42 X 10/3
30
42
10
39
0.57
48500
0.0331
301190
L 32 X 45 X 10
32
45
10
42
0.4
43000
0.0401
301192
L 32 X 45 X 10/3
32
45
10
42
0.6
43000
0.0401
301193

35 - 45 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 35 X 47 X 10
35
47
10
44
0.4
39500
0.038
301194
L 35 X 47 X 10/3
35
47
10
44
0.55
39500
0.038
301195
L 40 X 52 X 10
40
52
10
49
0.4
33000
0.0429
301199
L 40 X 52 X 10/3
40
52
10
49
0.9
33000
0.0429
301200
L 42 X 55 X 10
42
55
10
52
0.4
30000
0.051
301204
L 42 X 55 X 10/3
42
55
10
52
0.6
30000
0.051
301205
L 45 X 55 X 10
45
55
10
52
0.4
30500
0.0349
301206
L 45 X 55 X 10/3
45
55
10
52
0.6
30500
0.0349
301207
L 45 X 62 X 10
45
62
10
59
0.4
24500
0.0821
301210
L 45 X 62 X 10/3
45
62
10
59
0.6
24500
0.0821
301211

48 - 58 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 48 X 62 X 10
48
62
10
59
0.4
24500
0.0647
301215
L 48 X 62 X 10/3
48
62
10
59
0.6
24500
0.0647
301216
L 50 X 62 X 10
50
62
10
59
0.4
28000
0.0526
301217
L 50 X 62 X 10/3
50
62
10
59
0.7
28000
0.0526
301218
L 52 X 68 X 10
52
68
10
3
0.4
24000
0.0852
301220
L 52 X 68 X 10/3
52
68
10
65
0.6
24000
0.0852
301221
L 55 X 68 X 10
55
68
10
65
0.4
24000
0.0653
301222
L 55 X 68 X 10/3
55
68
10
65
0.6
24000
0.0653
301223
L 58 X 72 X 10
58
72
10
68.5
0.4
22000
0.0742
301226
L 58 X 72 X 10/3
58
72
10
68.5
0.6
22000
0.0742
301227

60 - 65 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 60 X 72 X 10
60
72
10
68.5
0.4
22000
0.0596
301228
L 60 X 72 X 10/3
60
72
10
68.5
0.6
22000
0.0596
301229
L 60 X 80 X 10
60
80
10
76
0.4
18500
0.1275
301230
L 60 X 80 X 10/3
60
80
10
76
0.6
18500
0.1275
301231
L 63 X 80 X 10
63
80
10
76
0.4
18500
0.1046
301234
L 63 X 80 X 10/3
63
80
10
76
0.6
18500
0.1046
301235
L 65 X 80 X 10
65
80
10
76
0.4
18500
0.0888
301237
L 65 X 80 X 10/3
65
80
10
76
0.7
18500
0.0888
301238
L 65 X 85 X 10
65
85
10
81
0.42
17000
0.137
301240
L 65 X 85 X 10/3
65
85
10
81
0.7
17000
0.137
301241

68 - 72 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 68 X 85 X 10
68
85
10
81
0.42
16500
0.1122
301243
L 68 X 85 X 10/3
68
85
10
81
0.7
17000
0.1122
301244
L 70 X 85 X 10
70
85
10
81
0.42
16500
0.144
301247
L 70 X 85 X 10/3
70
85
10
81
0.7
16500
0.144
301248
L 70 X 90 X 10
70
90
10
86
0.42
15000
0.1464
301250
L 70 X 90 X 10/3
70
90
10
86
0.7
15000
0.1464
301251
L 72 X 90 X 10
72
90
10
86
0.42
15000
0.1288
301254
L 72 X 90 X 10/3
72
90
10
86
0.52
15000
0.1288
301255

75- 90 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 75 X 90 X 10
75
90
10
86
0.42
15000
0.1014
301257
L 75 X 90 X 10/3
75
90
10
86
0.6
15000
0.1014
301258
L 80 X 100 X 10
80
100
10
95
0.42
14500
0.1575
301266
L 80 X 100 X 10/3
80
100
10
95
0.7
14500
0.1575
301267
L 85 X 100 X 10
85
100
10
95
0.42
14500
0.106
301270
L 90 X 110 X 10
90
110
10
105
0.42
12000
0.1755
301272
L 90 X 110 X 10/3
90
110
10
105
0.52
12000
0.1755
301273

100 - 130 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 100 X 120 X 10
100
120
10
115
0.42
10500
0.1935
301278
L 100 X 120 X 10/3
100
120
10
115
0.6
10500
0.1935
301279
L 100 X 120 X 14
100
120
14
115
0.7
11000
0.2503
301282
L 100 X 120 X 14/3
100
120
14
115
1
11000
0.2503
301283
L 110 X 130 X 15
110
130
15
125
0.7
11500
0.2851
301285
L 110 X 130 X 15/3
110
130
15
125
1
11500
0.2851
301286
L 120 X 140 X 15
120
140
15
135
0.7
10000
0.3095
301293
L 120 X 140 X 15/3
120
140
15
135
1
10000
0.3095
301294
L 130 X 150 X 15
130
150
15
145
0.7
9000
0.3339
301297
L 130 X 150 X 15/3
130
150
15
145
1
9000
0.3339
301298

140 - 170 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 140 X 170 X 15
140
170
15
165
0.7
7000
0.6526
301301
L 140 X 170 X 15/3
140
170
15
165
1.2
7000
0.6526
301302
L 150 X 180 X 15
150
180
15
175
0.7
6500
0.6957
301304
L 150 X 180 X 15/3
150
180
15
175
1.2
6500
0.6957
301305
L 160 X 190 X 20
160
190
20
184.5
0.8
6000
0.9545
301306
L 160 X 190 X 20/3
160
190
20
184.5
1.3
6000
0.9545
301307
L 170 X 210 X 20
170
210
20
204.5
0.8
5000
1.5002
301309
L 170 X 210 X 20/3
170
210
20
204.5
1.3
5000
1.5002
301310

180 - 210 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
L 180 X 210 X 20
180
210
20
204.5
0.8
5000
1.0659
301312
L 180 X 210 X 20/3
180
210
20
204.5
1
5000
1.0659
301313
L 190 X 230 X 20
190
230
20
224.5
0.8
4500
1.6613
301316
L 190 X 230 X 20/3
190
230
20
224.5
1.3
4500
1.6613
301317
L 200 X 230 X 20
200
230
20
224.5
0.8
4500
1.1773
301318
L 200 X 230 X 20/3
200
230
20
224.5
1.2
4500
1.1773
301319
L 210 X 250 X 22
210
250
22
244.5
1
4000
1.9597
301321
L 210 X 250 X 22/3
210
250
22
244.5
1.3
4000
1.9597
301322
L 220 X 250 X 22 S
210
250
22
244.5
1
4000
1.3728
301325

15 - 20 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 15 X 26 X 8
15
26
8
3
24
0.35
63500
0.0152
301337
M 15 X 26 X 8/3
15
26
8
3
24
0.5
63500
0.0152
301338
M 18 X 28 X 10
18
28
10
3
26
0.38
56500
0.0171
301341
M 18 X 28 X 10/3
18
28
10
3
26
0.5
56500
0.0171
301342
M 20 X 28 X 10
20
28
10
3
26
0.38
81000
0.0124
301343
M 20 X 28 X 10/3
20
28
10
3
26
0.6
81000
0.0124
301344
M 20 X 30 X 10
20
30
10
3
28
0.38
70500
0.0187
301345
M 20 X 30 X 10/3
20
30
10
3
28
0.6
70500
0.0187
301346

22 - 32 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 22 X 30 X 10
22
30
10
3
28
0.38
71000
0.0135
301347
M 22 X 30 X 10/3
22
30
10
3
28
0.6
71000
0.0135
301348
M 25 X 37 X 10
25
37
10
3
34
0.38
50500
0.0283
301349
M 25 X 37 X 10/3
25
37
10
3
34
0.6
50500
0.0283
301350
M 28 X 39 X 10
28
39
10
3
36
0.38
45500
0.0268
301351
M 28 X 39 X 10/3
28
39
10
3
36
0.7
45500
0.0268
301352
M 30 X 42 X 10
30
42
10
3
39
0.38
48500
0.0331
301353
M 30 X 42 X 10/3
30
42
10
3
39
0.6
48500
0.0331
301354
M 32 X 45 X 10
32
45
10
3
42
0.4
43000
0.0401
301355
M 32 X 45 X 10/3
32
45
10
3
42
0.6
43000
0.0401
301356

35 - 45 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 35 X 47 X 10
35
47
10
3
44
0.4
39500
0.038
301357
M 35 X 47 X 10/3
35
47
10
3
44
0.55
39500
0.038
301358
M 40 X 52 X 10
40
52
10
3
49
0.4
33000
0.0429
301360
M 40 X 52 X 10/3
40
52
10
3
49
0.9
33500
0.0429
301361
M 42 X 55 X 10
42
55
10
3
52
0.4
30000
0.051
301364
M 42 X 55 X 10/3
42
55
10
3
52
0.6
30000
0.051
301365
M 45 X 55 X 10
45
55
10
3
52
0.4
30500
0.0349
301366
M 45 X 55 X 10/3
45
55
10
3
52
0.6
30500
0.0349
301367
M 45 X 62 X 10
45
62
10
3
59
0.4
24500
0.0821
301369
M 45 X 62 X 10/3
45
62
10
3
59
0.6
24500
0.0821
301370

48 - 58 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 48 X 62 X 10
48
62
10
3
59
0.4
24500
0.0647
301371
M 48 X 62 X 10/3
48
62
10
3
59
0.7
24500
0.0647
301372
M 50 X 62 X 10
50
62
10
3
59
0.4
28000
0.0526
301373
M 50 X 62 X 10/3
50
62
10
3
59
0.7
28000
0.0526
301374
M 52 X 68 X 10
52
68
10
3
65
0.4
24000
0.0852
301376
M 52 X 68 X 10/3
52
68
10
3
65
0.6
24000
0.0852
301377
M 55 X 68 X 10
55
68
10
3
65
0.4
24000
0.0653
301378
M 55 X 68 X 10/3
55
68
10
3
65
0.6
24000
0.0653
301379
M 58 X 72 X 10
58
72
10
3
68.5
0.4
22000
0.0742
301384
M 58 X 72 X 10/3
58
72
10
3
68.5
0.6
22000
0.0742
301385

60 - 65 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 60 X 72 X 10
60
72
10
3
68.5
0.4
22000
0.0596
301387
M 60 X 72 X 10/3
60
72
10
3
68.5
0.6
22000
0.0596
301388
M 60 X 80 X 10
60
80
10
3
76
0.4
18500
0.1275
301389
M 60 X 80 X 10/3
60
80
10
3
76
0.6
18500
0.1275
301390
M 63 X 80 X 10
63
80
10
3
76
0.4
18500
0.1046
301392
M 63 X 80 X 10/3
63
80
10
3
76
0.6
18500
0.1046
301393
M 65 X 80 X 10
65
80
10
3
76
0.4
18500
0.0888
301394
M 65 X 80 X 10/3
65
80
10
3
76
0.7
18500
0.0888
301395
M 65 X 85 X 10
65
85
10
3
81
0.42
17000
0.137
301396
M 65 X 85 X 10/3
65
85
10
3
81
0.7
18500
0.137
301397

68 - 72 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 68 X 85 X 10
68
85
10
3
81
0.42
16500
0.1122
301400
M 68 X 85 X 10/3
68
85
10
3
81
0.6
16500
0.1122
301401
M 70 X 85 X 10
70
85
10
3
81
0.42
15000
0.144
301404
M 70 X 85 X 10/3
70
85
10
3
81
0.7
16500
0.144
301405
M 70 X 90 X 10
70
90
10
3
86
0.42
15000
0.1464
301406
M 70 X 90 X 10/3
70
90
10
3
86
0.7
15000
0.1464
301407
M 72 X 90 X 10
72
90
10
3
86
0.42
15000
0.1288
301409
M 72 X 90 X 10/3
72
90
10
3
86
0.52
15000
0.1288
301410

75- 90 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 75 X 90 X 10
75
90
10
3
86
0.42
15000
0.1014
301411
M 75 X 90 X 10/3
75
90
10
3
86
0.6
15000
0.1014
301412
M 80 X 100 X 10
80
100
10
3
95
0.42
14500
0.1575
301420
M 80 X 100 X 10/3
80
100
10
3
95
0.7
14500
0.1575
301421
M 85 X 100 X 10
85
100
10
3
95
0.42
14500
0.1063
301426
M 90 X 110 X 10
90
110
10
3
105
0.42
12000
0.1755
301428
M 90 X 110 X 10/3
90
110
10
3
105
0.52
12000
0.1755
301429
M 87 X 100 X 10
87
100
10
3
95
0.42
14500
0.1063
307219

100 - 130 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 100 X 120 X 10
100
120
10
4
115
0.42
10500
0.1935
301433
M 100 X 120 X 10/3
100
120
10
3
115
0.6
10500
0.1935
301434
M 110 X 130 X 15
110
130
15
5
125
0.7
9500
0.2851
301439
M 110 X 130 X 15/3
110
130
15
5
125
1
11500
0.2851
301440
M 120 X 140 X 15
120
140
15
5
135
0.7
10000
0.3095
301445
M 120 X 140 X 15/3
120
140
10
5
135
1
10000
0.3095
301446
M 130 X 150 X 15
130
150
15
5
145
0.7
9000
0.3339
301449
M 130 X 150 X 15/3
130
150
15
5
145
1
9000
0.3339
301450

140 - 170 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 140 X 170 X 15
140
170
15
5
165
0.7
7000
0.6526
301453
M 140 X 170 X 15/3
140
170
15
5
165
1.3
7000
0.6526
301454
M 150 X 180 X 15
150
180
15
5
175
0.7
6500
0.6957
301455
M 150 X 180 X 15/3
150
180
15
5
175
1.2
6500
0.6957
301456
M 160 X 190 X 20
160
190
20
5
184.5
0.8
6000
0.9545
301457
M 160 X 190 X 20/3
160
190
10
5
184.5
1.3
6000
0.9545
301458
M 170 X 210 X 20
170
210
20
5
204.5
0.8
5000
1.5002
301460
M 170 X 210 X 20/3
170
210
20
5
204.5
1.3
5000
1.5002
301461

180 - 210 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Groove width
c
[mm]
Gap diameter
e
[mm]
Axial clearance
Sax
[mm]
Max. speed
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
M 180 X 210 X 20
180
210
20
5
204.5
0.8
5000
1.0659
301463
M 180 X 210 X 20/3
180
210
20
5
204.5
1
5000
1.0659
301464
M 190 X 230 X 20
190
230
20
5
224.5
0.8
4500
1.6613
301468
M 190 X 230 X 20/3
190
230
20
5
224.5
1.3
4500
1.6613
301469
M 200 X 230 X 20
200
230
20
5
224.5
0.8
4500
1.1773
301470
M 200 X 230 X 20/3
200
230
20
5
224.5
1.2
4500
1.1773
301471
M 210 X 250 X 22
210
250
22
5
244.5
1
3500
1.9597
301473
M 210 X 250 X 22/3
210
250
22
5
244.5
1.3
4000
1.9597
301474

Specific installation instructions - series L/M

Surrounding structure (connecting parts)

Tolerances

Housing: K7, Shaft: h 6

Surface quality: Rz  ≤ 16 µm; Ra  ≤ 3.2 µm

Installation

“l” length (chamfering of shaft and housing) depending on the width “W”: l = 0.1 x W

Aluminum outer ring

The aluminum outer ring can be slightly non-round in delivery condition. When the seal is pressed in, the relatively easily malleable ring adapts to the roundness of the hub again.

For production-related reasons, the outer ring can be up to 0.1 mm wider than the inner ring.

GMN labyrinth metal seals are pressed with a calibrating ring (“zero dimension”). The outer ring then springs back again due to its elasticity.

 

Montage_englisch
Blindbild_2x550

Tandem arrangement (L design)

Two metal seals positioned next to each other guarantee absolute leak-tightness with an intermediate drain hole (distance min. 5 mm). Liquid between the seals is drained off reliably.

DI_BF_LM_MO_neu_550x550
Blindbild_2x550

Seals with drainage groove (M design)

In limited spaces that do not permit a tandem arrangement, the M model offers a compromise in compact design. Penetrated liquids are removed via grooves in the outer ring into a ring groove in the housing.

Width of the ring groove in the customer part: R = c + 1 mm (c = groove width)

DI_BF_LM_MO_550x550
Blindbild_2x550