For Pricing and Days to Ship,Please Configure Online.
Hard Locking Bearing Nuts / Fine U Nuts
EA set of a nut and a special washer, the standard components to secure bearings.
Stainless
Steel
JLNSK
JLNS
Low Carbon Steel
No.10~20 303 Stainless Steel
No.25~50 304 Stainless Steel
HLB
HLBM
HLBC
304 Stainless Steel
-
HHardness
1018 Carbon Steel
Parker
-
D1
Electroless Nickel Plating
1045 Carbon Steel
22~28HRC
Thermal Refined
HLBU
2
S
Parker
304 Stainless Steel
HLBS
*Designed Offset (a) is provided between No. 2 Nut boss.
1
b
-
e
e1
B
l
B'
EFor Thin Type (HLBU), mount the second nut (upper nut) first, followed by the first one.
Part Number
Type
2Tooth Lock Washer for Bearing
B
25°
S1
T
30˚
<Thin>
HLBU(M25~50)
D1
V
44
50
56
61
11
12
13
14
8
9
10
11
Part Number
4.2
4.2
Screw Accuracy: JIS B0211 6H (Class 2)
1+2Set
(Steel)
JLNK
(Stainless Steel)
JLNSK
1Only
(Stainless Steel)
JLNS
No.
10
12
15
17
20
25
30
35
40
45
50
d1
10
12
15
17
20
25
30
35
40
45
50
4
5
6
7
8
9
10
11
d
14
18
21
24
28
34
41
48
53
60
65
Reference Mass (g)
S
T
3
4
2
5
6
2.5
2Tooth Lock Washer for Bearing
k
S1 S2
t
V
D3
8.5
21
3 3
2
10.5
25
13.5
28
1.0
15.5
4 4
32
18.5
36
23
42
5
2.5
27.5
5
49
32.5
57
1.2
37.5
62
6
6
42.5
69
47.5
74
Part Number
1+2Set
JLNK
1Only
JLN
Configure Online
1 -917
13
17
21
24
26
32
38
44
50
56
61
B
-
3
8
4
5.5
10
7
11
9
10
11
8
9
10
11
4
6
3
4.0
7
5
6
7
4
5
6
7
4.0
9.5
-
4.5
2.0
5
6
per Set (1+2)
per 1 pc. (1Only)
JLNK JLNSK JLN
JLNS
5.0
5.3
3.7
4.1
8.3
8.2
6.4
6.6
12.5
12.7
10
10.3
15.5
16.3
12.4
13
21.5
22.8
19
19.5
31.4
36.6
25
31.2
47.8
48.3
40
41.1
63.4
73.7
53
64.3
97.3
97.7
85
86.5
134.2
135
119
121
162.5
161.5
146.5
147
2.5
QStructure and Function of Hard Locking Baring Nut
Number of Teeth
9
13
15
17
Configure Online
Slot Width a Slot Depth b
4
5
JLN
JLNS
(1Only)
Unit Price
Unit Price
HLBM
HLBC
HLBS
-
HLB
10
12
15
17
20
25
30
35
40
45
50
13.5 14.5
16.0 17.5
10
18.0
17.0
19.0
21.0
12
14
16
18
19.5
18.5
20.5
22.5
QComparison with Conventional Products
Strong wedge effect occurs in this part.
2nd Nut Boss Eccentric Center
HLBU
P1
a
a b
1
Fig. -2
Wedge action does not change even when nuts are installed upside
E
down of the figure on the left.
P1
Fig.-1
Unlike standard bearing nut sets, no keyway
machining is required for toothed washers and
shafts.
2
-
P3
P2
Fig.-2
W
hen upper nut is tightened, stress is automatically applied in P1
arrow direction. Horizontal stress continues to increase with tightening
until upper nut closely contacts lower nut as shown in Fig.-2.
The nuts are fully locked by the wedge effect.
After nuts are tightened, internal stress remains distributed as
composite stress of P1 + P2 + P3 to resist external impact.
0
QFine U Nut®
Type
d -0.5
S ±0.2
MMaterial
Main Body
Friction Ring
FUNT
440C Stainless Steel Equivalent
FUNTC
1045 Carbon Steel Thermal Refined
(22~28HRC)
FUNTS
304 Stainless Steel
301
Stainless
Steel
H
h
Clamp
Friction Ring
M
30°
2
Part Number
Type
a
FUNT
FUNTC
FUNTS
2.5
7
-
Fig. -1
Screw Center of Bolt and Nut
Dim. of Tooth Lock Washer Mounting Groove (Reference)
D4
13
17
21
24
26
32
38
44
50
56
61
10.5
11.5 12.5
QPrecautions for Use
Machine chamfering (C=1 pitch equivalent) on the tip of male thread, whose precision grade is
JIS 6g (Class 2).
0 .5
-0
JLN
D2
2.5
D
(Steel)
No. MxPitch D1
(Fine)
10 10x0.75 18
12 12x1.0 22
15 15x1.0 25
17 17x1.0 28
20 20x1.0 32
25 25x1.5 38
30 30x1.5 45
35 35x1.5 52
40 40x1.5 58
45 45x1.5 65
50 50x1.5 70
JLNK JLNSK
(1+2Set)
M
b
Type
1Bearing Nut
3.5
-
7
Mass per
Set (g)
Standard Thin
15
17
23
29
43
0.05 72
45
11.5
103 63
13.5
150 100
15.5
170 140
17.5
240 201
19.5
285 250
Perpendicularity
of End Face
(Max.)
t
Configure Online
Part Number
6
Configure Online
HLB35
D3
d1
D4
k
M
D2
S2
52
58
65
70
18
22
25
28
32
38
45
52
58
65
70
Common to No. 1 and 2
Setting HeightL
2No. 2 Nut (Upper Nut)
B´
e1
b
Standard
Thin
S
T
Standard Thin Standard Thin Standard Thin
Min Max Min Max
0
S
10x0.75
12x1.0
15x1.0
17x1.0
20x1.0
25x1.5
30x1.5
35x1.5
40x1.5
45x1.5
50x1.5
D1
D1 -0.5
d
10
12
15
17
20
25
30
35
40
45
50
<Standard>
HLB (M10~50)
HLBM(M12~50)
HLBC(M10~50)
HLBS (M12~50)
1No. 1 Nut (Lower Nut)
B
e
D2
Standard Thin Standard Thin
18
13
6
22
17
25
21
2.7
7
28
24
32
26
8
38
32
10
7
3.7
45
38
MxPitch
(Fine)
D1
Screw Accuracy: JIS B0211 6H (Class 2)
T
1Bearing Nut
M
21
a*
1018 Carbon Steel
MMaterial
M
JLN
Type
Standard Thin Type
D2
D1
1Only
JLNK
S
QHard Locking Bearing Nuts
a*
1+2Set
Steel
2Tooth Lock Washer for Bearing
MMaterial
D1
Type
1Bearing Nut
MMaterial
T
Type
M
Bearing Nuts / Toothed Lock Washers for Bearings
3
QBearing Nuts and Toothed Lock Washers
· These 2 items are common parts for securing
bearings.
·N
ut loosening can be prevented by machining a
vertical groove (Keyway) on the thread of a rotary
shaft, and by tightening the nut and the shaft with
the tooth lock washer.
[Mounting Procedure]
(1)Assemble a bearing onto a rotary shaft.
(2)Fit the tooth lock washer tab (S2) in the groove of
the rotary shaft (a).
(3)Tighten the bearing nut.
(4)Fold the tooth lock washer tab (S1) to fit the groove
of the baring nut (S).
M
8
10
12
15
17
20
25
30
35
40
45
50
MxPitch
(Fine)
8x0.75
10x0.75
12x1.0
15x1.0
17x1.0
20x1.0
25x1.5
30x1.5
35x1.5
40x1.5
45x1.5
50x1.5
Part Number
FUNT10
QHard Lock Structure
As shown in the figure, stress P is caused
by the spring effect when Friction Ring
contacts the thread. The reaction force
P' together with P presses hard upon the
P´
threads, which creates friction torque
(prevailing torque) to prevent any free
P
motion.
EFine U Nut® is a registered trademark of FUJISEIMITSU CO., LTD.
D
D1
d
T
16
18
22
25
28
32
38
45
52
58
65
70
12
13.5
17
21
24
26
32
38
44
50
56
61
13
14.4
18.4
21.4
24.2
28.4
34
41
48
53
60
65
1.5
S
3
1.8
1.9
1.8
4
2
5
2.5
6
Configure Online
H
5.3
5.2
5.4
6.5
6.4
7.7
9.1
9.1
10.2
11.2
12.5
13.5
h
Perpendicularity of
End Face (Max.)
Screw Accuracy: JIS 6H (Class 2)
FUNT
4.3
±0.3
Unit Price
FUNTC
FUNTS
-
4
5
±0.5
6
0.05
7
±0.8
±1.0
8
9
10
11
Configure Online
QPrecautions for Use
· Machine chamfering (C=1 pitch equivalent) on the tip of male thread, whose precision grade is JIS 6g (Class 2).
· Use lubricant when threading in and out.
(Use extra high performance lubricant when shaft hardness is low.)
· For optimal performance, ensure that the complete thread portion is to extrude by 2 pitches or more from friction ring side.
· The perpendicularity of the plane end in the above table is effective only when tightened with twice or more than prevailing torque.
· Not usable with high speed impact wrenches.
· Not usable on machined thread portion of shafts (keyway, etc.).
· Screwing in from the friction ring side is impossible.
· Do not use when the deflection of friction rings or clamp part occurs.
1 -918