Technical Load Capacity and Life


The load capacity and life expectancy of HepcoMotion ring slides, segments and track systems is determined by many factors including the ring size, the type and number of bearings, the presence of lubrication, the magnitude and direction of loads, the speed and the distance travelled.


It is usual to run systems at much less than the maximum load to prolong life, which can be calculated using the data and formulae in this section. For calculation purposes, systems fall into two categories, those where a carriage runs on a ring slide, segment or track system and those where a ring slide is captivated and rotates in a number of bearings (or the similar arrangement where the ring slide is stationary and the bearings and load rotate).


Where possible, systems should be oiled using Hepco lubricators 37 and/or the bleed lubrication system 52. This will greatly extend system life.


Systems with carriages


When calculating the life, first the load on each carriage should be resolved into the direct load components L1 and L2 and moment load components M, Mv and Ms.


Carriage Load Capacities


Capcities are shown for both 'dry' and 'lubricated' conditions - this refers to the bearing and slide 'V' contact, since all bearings are lubricated internally for life.


Values are based on shock-free duty.


Carriage Part


Number FCC 12 93


Dry System (Twin and DR Type Bearings) Lubricated System (Twin Type Bearings) Lubricated System (DR Type Bearings) L1(max)


L2(max) Ms(max) Mv(max) M(max) L1(max) L2(max) Ms(max) Mv(max) M(max) L1(max) L2(max) Ms(max) Mv(max)


N N Nm Nm Nm N N Nm Nm Nm N N Nm Nm Nm 90 90 0.5


FCC 12 127 90 90 0.5 FCC 20 143 180 180 1.6


1 1


2.5


1 240 240 1.3 2.7 2.7 1 240 240 1.3 2.6 2.6 2.5 500 400 4.5


FCC 20 210 180 180 1.6 2.7 2.7 500 400 4.5 8


5.5 6


Not Available Not Available


7 760 1200 7 7.5 760 1200 7


16 10 18 11


FCC 25 159 400 400 4.5 8.5 8.5 1280 1200 14 25 27 1600 3000 18 64 33 FCC 25 255 400 400 4.5


8 1280 1200 14 23 25 1600 3000 18 60 31


FCC 25 351 400 400 4.5 8.5 8.5 1280 1200 14 24 27 1600 3000 18 63 33 BCP 25


400 400 4.5 15 15 1280*1 1200*1 14*1 FCC 44 468 800 800 16 28 45*1 48*1 1600*1 3000*1 18*1 110*1 60*1 28 3200 2800 64 95 110 3600 6000 73 210 120


FCC 44 612 800 800 16 29 29 3200 2800 64 100 115 3600 6000 73 220 130 BCP 44


800 800 16 40 40 3200*1 2800*1 64*1 140*1 160*1 3600*1 6000*1 73*1 300*1 180*1


FCC 76 799 1800 1800 64 85 85 7200 6400 250 300 340 10000 10000 360 470 470 FCC 76 1033 1800 1800 64 105 105 7200 6400 250 360 410 10000 10000 360 570 570 FCC 76 1267 1800 1800 64 120 120 7200 6400 250 420 480 10000 10000 360 670 670 FCC 76 1501 1800 1800 64 140 140 7200 6400 250 480 550 10000 10000 360 770 770 BCP 76


The L2 & Mv load capacities for carriages using floating bearings


The L1 & Ms load capacities for carriages using floating bearings are zero (they are free to float in these directions). Please note that bogie carriages (BCP) are not available with floating bearings.


To determine life, calculate the load factor LF using equation [1] below, then use equation [3] or [4] to determine life for the system.


[1]


Notes: 1.


LF = L1 L1(max) + L2 L2(max) + Ms Ms(max) + Mv Mv(max) + M M(max) 1 or 0.8 for stainless steel


In heavily loaded applications using bogie carriages, the bogie swivel bearings can affect life. Applications for bogie carriages in which LF is more than 0.43, calculated using the *1


load figures from the table above, should be referred to Bishop-Wisecarver to confirm suitability.


2. When calculating L2 and Ms loadings, the centrifugal force must be included which acts radially outwards from the center of mass (COM) of the moving object. Its magnitude is F = DV2


/R, where V is the velocity of the COM in m/s, R is the distance of the COM from the ring axis in meters and D is the mass in kg. F is in N (newtons). 54 M(max) Mv M L1 Ms L2


1800 1800 64 115 115 7200*1 6400*1 250*1 415*1 460*1 10000*110000*1 360*1 650*1 650*1 36 are the same as is shown above for DR bearings.


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64