Catalogues - skf-spherical-plain-bearings-rod-ends-4407-ii-e

Catalogue SKF spherical plain bearings & rod ends (4407/II E)

www.skf.com

Page

/ 136

Contact the
Manufacturer

Where to buy
this product ?

Request
a Quote

/ 136

See other catalogues for SKF

Text version of the page

2 Recommendations

3 Product data

1 Product information

Page

Basic rating life

Page


	Table pT
	Type of load Factor	Permissible specific bearing load¹'
	- - N/mm²
	Constant load²' Single direction 1
	Variable load Alternating direction or pulsating magnitude at a frequency up to 0,5 Hz 0,25 over 0,5 up to 5 Hz 0,1	25 to 40 15 to 25
	2 Inertia forces should also be taken into consideration. ² For constant load, oscillating frequencies above 300 min^-1 and very short sliding distances, b₁ = 1 can no longer be used because of possible material fatigue; please contact SKF for guidance

Load direction factor b₁ for sliding contact surface combination steel/PTFE composite

Maintenance-free sliding contact surface combination steel/PTFE composite

bi b2 b3— pv

G = 60 f G_hwhere

G = basic rating life, number of oscillations

G_h = basic rating life, operating hours b = load direction factor Table ¡9 ) b₂ = temperature factor Diagram

P| )

b₃ = sliding factor Table m0 ) K_M = material constant TableF0) f = frequency of oscillation, min^-1p = specific bearing load, N/mm²v = mean sliding velocity, m/s

Temperature factor b₂ for sliding contact surface combination steel/PTFE composite

Diagram 19

1,0

0,8 0,6 0,4 0 ,2 J

80 100

t °C

Sliding factor b₃and constant KM for sliding contact surface combination steel/PTFE composite


Table 10
Bearing type Series	Bore diameter d Nominal over incl.		Sliding factor b₃	Constant K_M
-mm--
Radial bearings GEP FS GEC FSA	180 440 440	180 440 440	1 1,15 1,35 1 1,15	1 055 1 055 1 055 1 055 1 055
Angular contact bearings¹' GAC F -60		60	1 1,5	480 480
Thrust bearings GX F	60	60	1 1,5	670 670
Rod ends			1	530
¹⁾ For preloaded bearings which cannot be re-adjusted, b₃ always =

NB.

I.The basic rating life calculated using the above equation can be doubled by initial lubrication together with occasional relubri-cation, see under "Lubrication and maintenance".

2. Calculation of the rating life considers the influence of the load and sliding velocity. Under very light loads and/or low sliding velocities, the equations will give relatively long service lives. However, the influence of environmental factors such as contamination, damp or moisture and corrosion increases in importance the longer the life so that deviations from the calculated life occur and in many cases the calculated life will not be attained.

SKF