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Tpees for JF bush's grovves indentations
Lock types of JF wrapped bushes
The designing of oil indentations
In order to fully lubricate the bush when in the performance,the indentations with size as flows are recommended.They should be manufactured according to the standard below if withoutspecial requirements.
Bush O.D
From to
14~22
22!44
40~50
50~100
100~180
Lubricating Hole
3
3
3
6
7
The lubricating hole should be away from butt joint and loading area and designed to by easy-oil feeding as well.
Thickness of the JF double layer metal and their tolerances
Nominal Thickness
1
1.5
2
2.5
3
3.5
4
5
Thickness of steel backing
0.6
1
1.4
1.9
2.3
2.8
3.2
4
Thickness of bronze layer
0.4
0.5
0.6
0.6
0.7
0.7
0.8
1.0
Manufacturable Wall Thickness
1+0.25
+0.15
1.5+0.25
+0.15
2+0.25
+0.15
2.5+0.25
+0.15
3+0.25
+0.15
3.5+0.25
+0.15
4+0.25
+0.15
4+0.25
+0.15
Manufactured wall Thickness
1-0.025
1.5-0.03
2-0.035
2.5-0.04
3-0.045
3.5-0.05
4-0.055
4-0.06
Composition analysis of jf alloy
Chemical elements
HTB-800
HTB-720
HTB-700 
HTB-20
Cu
Remainder
Remainder
Remainder
0.7~1.3
Pb
9.0~11.0
21.0~27.0
26.0~33.0
-
Sn
9.0~11.0
3.0~4.5
0.5
17.5~22.5
Zn
0.5
0.5
0.5
-
P
0.1
0.1
0.1
 
Fe
0.7
0.7
0.7
0.7
Ni
0.5
0.5
0.5
0.1
Sb
0.2
0.2
0.2
-
Ai
-
-
-
Remainder
Si
-
-
-
0.7
Mn
-
-
-
0.7
Ti
-
-
-
0.2
Other
0.5
0.5
0.5
0.5
JF Bimetal bushing Physical Characteristics
Physical Characteristics
HTB-800
HTB-720
HTB-700
HTB-20
Load Limit
N/M*M
150
130
120
100
Tensile Strenghth N/mm2
150
150
200
200
Speed Limit Vmax m/s
5
10
15
25
Friction coef(Oil)
0.06~0.14
0.06~0.16
0.08~0.16
0.08~0.17
PV Limit
N/mm2 m/s
Grease
2.8
2.8
2.5
-
Oil
10
10
8
6
"Sapphire" Fatigue Clasee Mpa
125
115
105
85