1.Inside diameter of the bushing
Generally,the inside diameter of the bushing depends on the diameter of its mating axis.
2.Length of the bushing
The length of the bushing depends on the size of the pressure-shouldering surface.The longer the bushing,the less pressure at the surface,for the onger bushing, the load on the bushing is relatively lessened. But simultaneously, it may result in deviation contact or lower cooling efficiency and thus shorten the service life of the bushing. On the contrary, if the length of the bushing is too short,lubricating grease may quickly flow out of the bushing.Therefore,it hardly forms a grease film and capability of the bushing is accordingly debased./p>
A comparison of L/d's effect on the bushings,especially oil lubricating bushings
| Short bushing(d>L) | Comparison items | Long bushing(d<L) |
| Small |
Force on the oil film |
Great |
| Strong |
Cooling ability |
Weak |
| Can not be too high |
Surface pressure |
Can be high |
| High |
Safety aqainst beating deviation |
Low |
| Weak |
Bushing rigidity |
String |
| Weak |
Shock absorbing ability |
Strong |
| Small |
Space |
Large |
3.Bushing thickness
The main advantage of standard composite self-lubricating bushings rest with their thin wall thickness.Standard thickness can be 0.5mm2,0.75mm2;,1.0mm2,1.5mm2,2.0mm2,2.5mm2.
In thickness design of the non-standard gliding bushing,the designer could consult thefollowing proportion of SB and D.
A)For thin wall thickness gliding metallic bushing,proportion between SB and D equals to 0.03~0.06.
B)For thin wall thickness gliding metallic bushing, proportion between SB and D equals to 0.08~0.12
C)For plastic gliding bushing,proportion between SB and D equals to 0.1~0.12
4.Bushing Chamfer
In order to make fixing easier and avoid deviation load,the bushing must be inner and outer chamfered in the direction of its length.Dimension of the chamfer are showing in the following form.
| Wall thickness | Out Chamfer Dimension | Inner Chamfer Dimension |
| ≤0.5 |
Burr polished |
Burr polished |
| 0.75 |
0.5±0.3×20° |
0.3±0.2×45° |
| 1.0 |
0.6±0.3×20° |
0.3±0.2×45° |
| 1.5 |
0.6±0.3×20° |
0.4±0.2×45° |
| 2.0 |
1.2±0.3×20° |
0.6±0.2×45° |
| Weak |
Shock absorbing ability |
Strong |
| 2.5 |
1.8±0.3×20° |
0.6±0.2×45° |
