to quá bác. nhìn như gỗ ý
Composite bác ạ. Quora có bác so sánh ổ lăn với ổ trượt bác tham khảo thêm có gì hay:
1.
Rolling: Friction coefficient is lower.
Sliding: Friction is great.
2.
Rolling: Easy to sub-micron positioning.
Sliding: Difficult to achieve sub-micron positioning.
3.
Rolling: Easy to estimate life
Sliding: Difficult to estimate life
4.
Rolling: Easy to estimate rigidity
Sliding: Difficult to estimate rigidity
5.
Rolling: No play because of preload
Sliding: There is mechanical play
6.
Rolling: Wide range of use from low to high speed
Sliding: Unsuitable for extremely low and high speed
7.
Rolling: Long life through simple maintenance
Sliding: Precision is lost greatly by deteriorated guide surface
8.
Rolling: Can take shock load
Sliding: Poor in taking shock load
9.
Rolling: Require continuously lubricant supply
Sliding: Do Not require continuous lubricant supply