Needle Rollers are mainly known as Rolling Element but also act as Bearing if to be used on hard shaft and housing. Needle rollers are used where radial load and medium speeds are encountered. Needle rollers can also be useful in applications where the bearing envelope dimensions need to be kept to a minimum. Needle rollers tend to have slightly rounded ends as a stress-relieving feature, improving performance and life characteristics.
Technical Specifications
MEC Needle Rollers are available in different designs as shown below:-
Cylindrical rollers are used in bearings where the majority load is in the radial direction. Although mostly cylindrical in shape, some specialist bearings have convex barrel shapes or concave profiles depending on the application type and conditions. Pure cylindrical roller bearings cannot support any load in an axial direction. If axial support is required a separate bearing arrangement will be required.
Technical SpecificationsMEC Cylindrical Rollers are available in designs as shown below:-
BPM
Diameter: from 3.00 mm to 10.0 mm
Length: from 3.00 mm to 25.0 mm
GRADE
DIAMETER TOLERANCE (µm)
SORTING GROUPS (µm)
ROUNDNESS DEVIATION (µm)
ROUGHNESS (µm)
ENDS RUNOUT (µm)
LENGTH TOLERANCE (mm)
SURFACE
ENDS
G2
+0 – 10
2
1.0
0.15
0.30
0.010
+0.000-0.050 mm
G5
+0 – 10
5
1.5
0.20
0.020
+0.000-0.100 mm
In addition to above mentioned specifications rolling elements with special tolerance limits (plus tolerances, hardness as low as 45 HRc etc) can be supplied on request.
In addition rollers can be provided with end drops (Type ZB) as a stress relieving feature thereby increasing life performance.
In addition rolling elements can be manufactured with different materials (Stainless Steel SS, Mild Steel MS) if the quantities required are sufficient for economical production.
