Self-lubricating Fluoroplastic Bearing
Characteristic of DF series self-lubricating PTFE bearings:
01 DF Series self-lubricating PTFE bearing can apply to no fuel or difficult to refuel places, can be used without maintenance or less maintenance.
02 Good wear resistance, small friction coefficient, long service life.
03 With the right amount of elastic-plastic, the pressure distributes in a wide contact surface, improve the bearing capacity.
04 Static and dynamic friction coefficient are similar, can eliminate the low-speed crawling, so as to ensure the accuracy of the mechanical work.
05 Can reduce the mechanical vibration, reduce noise, prevent pollution, improve working conditions.
06 The transfer membrane can be formed in the process of operation, to protect the grinding shaft from getting stuck.
07 The request hardness of the shaft is low, even the shaft without quenching can be used, thereby reducing the processing difficulty of the relevant parts.
Typical Application:
Large oxygenator
Industrial boiler
Gas equipment
Hydraulic equipment
There are four series DF self-lubricating bearings:
Fit-tolerance and dimension of the DF-P sliding bearings(unit:mm)

ID x OD |
ID(B) |
OD(A) |
(H) |
(R) |
(L) |
12 x 17 |
12 +0.14/+0.09 |
17 +0.07/+0.02 |
17 +0.018/0 |
12 0/-0.018 |
12 |
15 x 20 |
15 +0.15/+0.10 |
20 +0.07/+0.02 |
20 +0.021/0 |
15 0/-0.021 |
12 |
20 x 25 |
20 +0.20/+0.13 |
25 +0.08/+0.03 |
25 +0.021/0 |
20 0/-0.021 |
20 |
25 x 31 |
25 +0.21/+0.13 |
31 +0.08/+0.03 |
31 +0.023/0 |
25 0/-0.021 |
25 |
30 x 36 |
30 +0.21/+0.13 |
36 +0.08/+0.03 |
36 +0.023/0 |
30 0/-0.021 |
30 |
35 x 41 |
35 +0.22/+0.14 |
41 +0.08/+0.03 |
41 +0.023/0 |
35 0/-0.025 |
35 |
40 x 46 |
40 +0.22/+0.14 |
46 +0.08/+0.03 |
46 +0.023/0 |
40 0/-0.025 |
40 |
50 x 57 |
50 +0.24/+0.16 |
57 +0.08/+0.03 |
57 +0.030/0 |
50 0/-0.025 |
50 |
60 x 67 |
60 +0.26/+0.16 |
67 +0.10/+0.04 |
67 +0.030/0 |
60 0/-0.030 |
60 |
70 x 78 |
70 +0.31/+0.21 |
78 +0.10/+0.04 |
78 +0.030/0 |
70 0/-0.030 |
70 |
80 x 88 |
80 +0.31/+0.21 |
88 +0.10/+0.04 |
88 +0.035/0 |
80 0/-0.030 |
80 |
100 x 110 |
100 +0.36/+0.26 |
110 +0.11/+0.05 |
110 +0.035/0 |
100 0/-0.035 |
100 |
120 x 130 |
120 +0.37/+0.27 |
130 +0.12/+0.05 |
130 +0.035/0 |
120 0/-0.035 |
120 |
Fit-tolerance and dimension of the DF-F flange bearings(unit:mm)

ID x OD |
ID(B) |
OD(A) |
(H) |
(R) |
F(±0.2) |
T (±0.1) |
L(±0.2) |
5 x 9 |
5 +0.09/+0.04 |
9 +0.06/+0.02 |
9 +0.015/0 |
5 0/-0.015 |
14 |
2.0 |
5 |
6 x 11 |
6 +0.10/+0.05 |
11 +0.06/+0.02 |
11 +0.015/0 |
6 0/-0.015 |
16 |
2.5 |
6 |
10 x 15 |
10 +0.12/+0.07 |
15 +0.07/+0.02 |
15 +0.018/0 |
10 0/-0.018 |
22 |
3.0 |
10 |
15 x 20 |
15 +0.15/+0.10 |
20 +0.07/+0.02 |
20 +0.018/0 |
15 0/-0.018 |
28 |
3.0 |
15 |
20 x 25 |
20 +0.18/+0.12 |
25 +0.08/+0.03 |
25 +0.021/0 |
20 0/-0.021 |
35 |
3.0 |
20 |
25 x 31 |
25 +0.20/+0.14 |
31 +0.08/+0.03 |
31 +0.023/0 |
25 0/-0.021 |
41 |
3.0 |
25 |
30 x 36 |
30 +0.21/+0.14 |
36 +0.08/+0.03 |
36 +0.023/0 |
30 0/-0.021 |
46 |
3.5 |
30 |
40 x 46 |
40 +0.22/+0.14 |
46 +0.08/+0.03 |
46 +0.025/0 |
40 0/-0.025 |
57 |
3.5 |
40 |
50 x 57 |
50 +0.24/+0.16 |
57 +0.08/+0.03 |
57 +0.025/0 |
50 0/-0.025 |
68 |
3.5 |
50 |
60 x 67 |
60 +0.26/+0.16 |
67 +0.10/+0.04 |
67 +0.030/0 |
60 0/-0.030 |
78 |
3.5 |
60 |
70 x 78 |
70 +0.28/+0.17 |
78 +0.10/+0.04 |
78 +0.030/0 |
70 0/-0.030 |
90 |
3.5 |
70 |
80 x 88 |
80 +0.31/+0.20 |
88 +0.10/+0.04 |
88 +0.035/0 |
80 0/-0.030 |
100 |
3.5 |
80 |
Fit-tolerance and dimension of the DF-T thrust bearings (unit:mm)

ID x OD |
ID(B) |
OD(A) |
L(±0.6) |
8 x 18 |
8 +0.12/0 |
18±0.07 |
1.5 |
10 x 12 |
10 +0.12/0 |
20±0.07 |
2.0 |
12 x 22 |
12 +0.12/0 |
22±0.07 |
2.0 |
15 x 28 |
15 +0.12/0 |
28±0.07 |
2.5 |
20 x 35 |
20 +0.12/0 |
35±0.07 |
2.5 |
30 x 50 |
30 +0.14/0 |
50±0.08 |
3.0 |
40 x 65 |
40 +0.14/0 |
65±0.08 |
3.0 |
50 x 80 |
50 +0.14/0 |
80±0.08 |
3.0 |
60 x 90 |
60 +0.15/0 |
90±0.08 |
3.5 |
80 x 120 |
80 +0.20/0 |
120±0.10 |
3.5 |
Fit-tolerance and dimension on the DF-L lined bearings (unit:mm)

ID X OD |
R |
H |
T(±0.03) |
T(±0.04) |
L(±0.2) |
8 x 12 |
8 0/-0.016 |
12 +0.15/0 |
0.8 |
2.0 |
8 |
12 x 16 |
12 0/-0.018 |
16 +0.18/0 |
1.0 |
2.0 |
12 |
16 x 20 |
16 0/-0.021 |
20 +0.21/0 |
1.0 |
2.0 |
16 |
20 x 24 |
20 0/-0.021 |
24 +0.21/0 |
1.0 |
2.0 |
20 |
25 x 30 |
25 0/-0.021 |
30 +0.25/0 |
1.2 |
2.5 |
25 |
30 x 35 |
30 0/-0.021 |
35 +0.25/0 |
1.2 |
2.5 |
30 |
40 x 45 |
40 0/-0.025 |
45 +0.30/0 |
1.2 |
2.5 |
40 |
50 x 55 |
50 0/-0.025 |
55 +0.30/0 |
1.2 |
2.5 |
50 |
Download PDF: Self-lubricating Fluoroplastic Bearing.pdf