This document provides specifications for various types of rubber buffers, including dimensions, material properties, and spring load characteristics. It lists the available sizes and dimensions of buffers types D and E, with information on standard and non-standard options. Tables show the compression characteristics and spring loads for different buffer sizes under various hardness levels of natural rubber compound. The document is from a company called GMT Rubber-Metal-Technic LTD that manufactures and sells industrial buffers.

1. Buffers Cont’d: Section 2
GMT RUBBER-METAL-TECHNIC LTD
Tel: (+44)(0)1943 870670 Fax: (+44)(0)1943 870631
E-Mail: sales@gmt.gb.com Website: www.gmt.gb.com
Buffer Type D
ØD
Compounds Produced:
H
Available Sizes
(Natural Rubber)
43° Shore A (soft)
57° Shore A (medium)
68° Shore A (hard)
L
= STANDARD STOCK
Dimensions Screw Thread
Special Screw
Dia/Ht (mm) Size x L (mm) Thread Size (mm)
Dimensions Screw Thread
Special Screw
Dia/Ht (mm) Size x L (mm) Thread Size (mm)
6/6
6/7
7/6
8/8
10/10
10/15
12/8
12/13
12/13.5
13/26
15/6
15/8
15/13
15/15
15/18
15/28
M3 x 6
M3 x 6
M3 x 6
M3 x 6
M4 x 10
M4 x 10
M4 x 12
M4 x 12
M4 x 12
M4 x 10
M4 x 13
M4 x 13
M4 x 13
M4 x 13
M4 x 13
M4 x 13
18/7.5
M6 x 16
20/5
20/12
20/13.5
20/15 *
20/20
20/23
20/25
25/5
25/6
25/8
25/13
25/15
25/17
25/20
25/25
25/28
30/5.5
30/10
30/15
30/17 *
30/20
30/25
30/28
30/30
30/40
30/55
M6 x 15
M6 x 15
M6 x 15
M6 x 15
M6 x 15
M6 x 15
M6 x 15
M6 x 18
M6 x 18
M6 x 18
M6 x 18
M6 x 18
M6 x 18
M6 x 18
M6 x 18
M6 x 18
M8 x 20
M8 x 20
M8 x 20
M8 x 20
M8 x 20
M8 x 20
M8 x 20
M8 x 20
M8 x 20
M8 x 20
40/5
40/6
40/10
40/15
40/18
40/20
40/28
40/38
40/40
40/50
50/17
50/21
50/27
50/36
50/42
50/45
70/42
70/45
M16
M16
M16
M16
M16
M16
M16 x 45
M16 x 45
M16 x 45
M20 x 45
M16 x 45
M16 x 45
M20 x 45
M20 x 45
250/48
*
M12 x 27
200/100
M8 x 8, M8 x 10
M8 x 13, M8 x 16
M8 x 18, M8 x 23
M8 x 27
M12 x 37
160/30
160/47
M6 x 6, M6 x 8
M6 x 10, M6 x 12
M6 x 15, M6 x 20
M12 x 27, M12 x 32
150/40
150/45
150/75
M6 x 8, M6 x 10
M6 x 12, M6 x 18
M6 x 20
M12 x 37
M12 x 37
M12 x 37
M12 x 37
100/35
100/40
100/50
100/100
125/38
125/60
M6 x 10
M10 x 25
80/40
M4 x 8, M4 x 10
M4 x 15, M5 x 15
M10 x 30
M10 x 30
75/15
75/25
75/36
75/51
M3 x 5, M5 x 5
M5 x 10
M8 x 23
M8 x 23
M8 x 23
M8 x 23
M8 x 23
M8 x 23
M8 x 23
M8 x 23
M8 x 23
M8 x 23
M10 x 28
M10 x 28
M10 x 28
M10 x 28
M10 x 28
M10 x 28
M20 x 45
x 45
x 45
x 45
x 45
x 45
x 45
M8 x 12, M8 x 13
M8 x 16, M8 x 28
M10 x 20
M8 x 23, M10 x 15
M10 x 20, M10 x 33
M12 x 27
M12 x 37, M16 x 37
These parts are only standard in natural rubber of hardness 57° Shore A
Note: Buffers can be manufactured in non-standard sizes, rubber hardness and various compounds, minimum order quantities may apply.
GMT RUBBER-METAL-TECHNIC LTD. The Sidings, Station Road, Guiseley, Leeds, West Yorkshire, LS20 8BX, U.K.
Page: 2.7
Version 2.0

2. Buffers Cont’d: Section 2
GMT RUBBER-METAL-TECHNIC LTD
Tel: (+44)(0)1943 870670 Fax: (+44)(0)1943 870631
E-Mail: sales@gmt.gb.com Website: www.gmt.gb.com
Buffer Type E
ØD
Compounds Produced:
(Natural Rubber)
43° Shore A (soft)
57° Shore A (medium)
68° Shore A (hard)
H
Available Sizes
= STANDARD STOCK
Dimensions Screw Thread
Special Screw
Dia/Ht (mm) Size x L (mm) Thread Size (mm)
6/6
6/7
7/6
8/8
10/10
10/15
12/13
12/13.5
13/26
15/13
15/15
15/18
15/28
20/12
20/13.5
20/15
20/20
20/23
20/25
25/13
25/15
25/17
25/20
25/25
25/28
30/15
30/17
30/20
30/25
30/28
30/30
30/40
30/55
40/15
40/18
40/20
40/28
40/38
40/40
40/50
M3
M3
M3
M3
M4
M4
M4
M4
M4
M4
M4
M4
M4
M6
M6
M6
M6
M6
M6
M6
M6
M6
M6
M6
M6
M8
M8
M8
M8
M8
M8
M8
M8
M8
M8
M8
M8
M8
M8
M8
Dimensions Screw Thread
Special Screw
Dia/Ht (mm) Size x L (mm) Thread Size (mm)
M10
M10
M12, M16
75/25
75/36
75/51
M12
M12
M12
M16
M12
100/35
100/40
100/50
100/100
125/38
125/60
M16
M16
M16
M16
M16
M16
150/40
150/45
150/75
M16
M16
M16
M20
160/30
160/47
M16
M16
M20
200/100
M20
250/48
M5
M8, M12
80/40
M5
M10
M10
M10
M10
M10
M10
70/42
70/45
M3, M5
50/17
50/21
50/27
50/36
50/42
50/45
M20
M12
M20
M10
Note: Buffers can be manufactured in non-standard sizes, rubber hardness and various compounds, minimum order quantities may apply.
GMT RUBBER-METAL-TECHNIC LTD. The Sidings, Station Road, Guiseley, Leeds, West Yorkshire, LS20 8BX, U.K.
Page: 2.8
Version 2.0

3. Buffers Cont’d: Section 2
GMT RUBBER-METAL-TECHNIC LTD
Tel: (+44)(0)1943 870670 Fax: (+44)(0)1943 870631
E-Mail: sales@gmt.gb.com Website: www.gmt.gb.com
Spring Characteristics For Types:
E
ØD
ØD
D
H
H
L
IMPORTANT NOTE: All values of load in the table shown apply to type D and E buffers. Reference should be made
to the beginning of this chapter for load calculations and to Section 1—Technical Information for selection examples.
Dia/Ht
(mm)
Compression
Characteristics
Def
(mm)
Dia/Ht
(mm)
Load (N)
43°
57°
68°
Compression
Characteristics
Def
(mm)
Dia/Ht
(mm)
Load (N)
43°
57°
68°
Compression
Characteristics
Def
(mm)
Load (N)
43°
57°
68°
0.4
8.3
15.9
22.1
0.9
83.0
115
167
1.3
308
553
805
0.9
1.3
18.7
27.0
35.7
51.6
49.7
71.8
1.8
2.7
166
249
231
346
333
500
2.5
3.8
592
900
1064
1617
1548
2352
23.7
47.5
67.3
43.7
87.5
124
64.0
128
181
56.5
113
170
104
209
313
194
299
448
243
487
730
443
887
1330
641
1282
1922
1.3
19.1
34.5
51
0.7
127
230
336
2.0
540
1014
1393
2.7
4.0
39.7
58.8
71.8
106
106
157
1.3
2.0
237
364
426
656
624
960
3.9
5.9
1054
1594
1977
2991
2717
4110
18/7.5
0.3
56.7
0.6
113.4
0.9
170.1
(MAX)
100
200
300
148
295
443
30/17
0.8
1.5
2.3
(MAX)
114
213
327
207
388
596
301
564
864
75/25
1.1
2.2
3.3
(MAX)
1228
2456
3683
2193
4387
6580
3143
6286
9429
20/12
0.5
47.3
1.0
94.6
1.5
142.0
(MAX)
87.8
176
263
125
250
375
30/20
0.9
1.8
2.7
(MAX)
99.5
199
298
180
359
539
261
522
783
75/36
1.7
3.3
5.0
(MAX)
789
1531
2319
1403
2724
4127
2034
3948
5982
10/10
25/20
(MAX)
15/13
0.6
1.2
1.7
(MAX)
25/28
(MAX)
15/28
20/13.5
20/23
20/25
1.3
2.6
3.9
(MAX)
50/42
(MAX)
30/15
(MAX)
0.6
50/27
2.0
4.0
6.0
(MAX)
70/42
(MAX)
(MAX)
46.2
84.1
127
1.3
83.3
157
248
2.4
610
1100
1592
1.2
92.3
1.7
130.8
(MAX)
168
238
254
360
2.6
3.9
(MAX)
167
250
314
471
496
744
4.8
7.2
(MAX)
1221
1831
2200
3300
3185
4777
1.1
37.9
2.1
72.4
3.2
110.3
(MAX)
70.1
134
204
103
196
298
1.3
2.6
3.9
(MAX)
171
342
512
309
617
926
451
902
1353
1.6
3.1
4.7
(MAX)
1827
3539
5366
3321
6434
9754
4813
9324
14137
38.1
73.1
68.3
131
98.9
190
1.8
3.6
152
303
273
546
400
801
1.8
3.6
1577
3154
2851
5702
4070
8140
3.5
111.2
(MAX)
199
289
5.4
(MAX)
454
818
1201
5.4
(MAX)
4730
8552
12210
1.2
2.3
30/28
40/28
40/38
75/51
100/35
100/40
0.6
25/13
85.7
156
227
0.8
484
877
1289
2.3
1240
2203
3277
1.1
1.7
157
243
286
442
415
642
1.5
2.3
907
1391
1645
2522
2417
3705
4.6
6.9
2480
3720
4406
6609
6555
9832
133
249
383
195
366
561
374
711
1086
678
1289
1967
980
1861
2841
943
1886
2829
1699
3397
5096
2456
4913
7369
50/17
(MAX)
25/17
0.8
73.7
1.5
138.3
2.3
212.0
(MAX)
(MAX)
50/21
1.0
1.9
2.9
(MAX)
100/50
(MAX)
4.8
9.6
100/100
14.4
(MAX)
Note: There is a possible deviation of ±20% in the above values due to production and hardness tolerances
GMT RUBBER-METAL-TECHNIC LTD. The Sidings, Station Road, Guiseley, Leeds, West Yorkshire, LS20 8BX, U.K.
Page: 2.9
Version 2.0