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Notes:
1. Kc is theoretical calculation value when preload Fp is 0.1Ca and axial load F is 0.3Ca.
2. when axial load F is not equal to 0.3Ca, Kc=K(F/0.3Ca)1/3. in formula: K is rigidity value shown in table
3. the normal working environment temperature for FFB type ball screw is ±60℃.
Code and spec
FFB
2004L-2FFB
2004-2FFB
2005-2FFB
2504-2FFB
2505-2FFB
2506-2FFB
3204-2FFB
3205-2FFB
5008-2
Nominal dia
d0
20
20
20
25
25
25
32
32
50
Basic lead
Ph0
4
4
5
4
5
6
4
5
8
Outer dia of ball screw
d1
19.3
19.1
19.5
24.1
24.5
23.9
31.1
31.5
48.6
Ball dia
dw
2.381
3
3.5
3
3.5
3.969
3
3.5
5
Bottom dia of ball screw
d2
17.5
16.9
16.9
21.9
21.9
20.9
28.9
28.9
44.9
Number of circles
n
2
2
2
2
2
2
2
2
2
Basic rated load KN
Dynamic load Ca KN
5.2
5.2
6.4
5.9
7.3
7.9
6.8
8.2
15.8
Static load C0aKN
10.2
10.2
12.2
13.5
15.7
15.8
18.6
21
44.6
Rigidity N/um
Kc
356
356
364
445
446
432
447
560
861
Mounting&
Connecting
dimensionD1(g6)
36
36
36
40
40
40
50
50
75
D2
36
36
36
40
40
40
50
50
75
L2
10
10
10
10
10
10
10
10
15
D3
62
62
62
66
66
66
76
82
118
B
11
11
11
11
11
11
11
13
18
D4
48
48
48
53
53
53
63
67
95
D5
5.8
5.8
5.8
5.8
5.8
5.8
5.8
7
11
D6
10
10
10
10
10
10
10
12
18
h
6
6
6
6
6
6
6
7
11
D7
42
42
42
46
46
46
56
62
90
M
M6
M6
M6
M6
M6
M6
M6
M6
M6
D8
25
25
25
30
30
30
38
38
60
L1
49
49
55
49
55
65
47
57
87
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