- Products
Rolling element
1) Needle
FBX provides whole range of needles, the needle material is bearing steel, the hardness is HRC60～65, the surface roughness Ra is not more than 0.2. Its dimensional tolerance, outline precision and needle groups show as table1:
Table1 Dimensional Tolerance, Outline Precision and Needle Group μm
|
Tolerance grade
|
The maximum diameter vibration VDWL
|
Upper and lower vibration for preferential group average diameter Dwmp
|
The maximum roundness vibration
|
Length tolerance
|
|
G2
|
2
|
0/-2, -1/-3, -2/-4,
-3/-5, -4/-6, -5/-7,
-6/-8, -7/-9, -8/-10
|
1
|
h13
|
|
G3
|
3
|
0/-3, -1.5/-4.5, -3/-6,
-4.5/-7.5, -6/-9, -7/-10
|
1.5
|
|
|
G5
|
5
|
0/-5, -3/-8, -5/-10
|
2.5
|
The end radius of round edge needle is R=1/2 （Dw～Lw）
The chamfer dimension of flat edge needle as table2:
Table2 The corner dimension of flat end needle mm
|
Needle nominal diameter Dw
|
Corner Limit
|
|||
|
Over
|
To
|
Rmin
|
max
|
|
|
Radial
|
Axial
|
|||
|
|
1
|
0.1
|
0.3
|
0.5
|
|
1
|
1.5
|
0.1
|
0.4
|
0.6
|
|
1.5
|
3
|
0.1
|
0.6
|
0.8
|
|
3
|
6
|
0.1
|
0.9
|
1
|
Needle marks: P stand for flat end needle, Y for round end needle is ignored.
Example of mark: Falt end needle P2.5 x 9.8 G2
Round end needle 2.5 x 9.8 G2
2)Cylindrical Roller
The dimensional range for FBX cylindrical roller: Dw:3～30, Lw: 5～50; the roller material is GCr15, the hardness is HRC60～65; and the hardness is HRC60～64 the material is GCr15SiMn,; surface roughness Ra is not more than 0.2.
The cylindrical dimension tolerance, group diameter and length vibration, corner dimension and tolerance, outline tolerance and surface roughness are all in accordance with national standards GB/T4661.
Examples of mark: Cylindrical Roller 5 x 8 Ⅲ +3/-15.
This is standing for the diameter is 5, the length is 8, tolerance grade is G3, the average diameter vibration is +3 μ m, group average length of vibration is -15 μ m.
3)Pin
FBX also mass-produces piston pin and other pin for powertool. It is normally made of bearing steel. The precision, surface hardness and roughness are all in accordance with the related industrial standards, or up to user’s requirements.
The marking method for pin refers to the cylindrical roller. It uses “Pin” directly for the type representation, then there is” Diameter * Length”.
Example of mark: Pin5*8