Home Page

The bearing load on the camshaft bearings due to the load. P. can be determined according to Cases (a) or (b). if the camshaft is supported by two bearings.

(ii) Disc cam with translating roller follower

a = pressure angle
Remaining notation as in Case (i), above.

P =    T         dq        lbs. =     Tw                         (9)
      cos a     dx                    v cos a

D200T34_1.jpg (6461 bytes)

The bearing load on the camshaft bearings due to the load, P, can be determined according to Cases (a) and (b), if the camshaft is supported by two bearings. Note that the force P in the above two cases is equivalent to a radial force, P. together with a torque about the cam axis.

(f) Spur Gears (External)

F = tangential force exerted by gear 1 on gear 2, lbs.
FR = radial force exerted by gear 1 on gear 2, lbs.
R1 = pitch radius of gear 1, in.
N1 = RPM of gear 1
T1 = torque on gear 1, in-lbs.
q =  pressure angle
H.P. = horsepower
      F = ( 63,025) H.P.                                                 
                    N1R1
      FR =  F tan  q                                                           

D200T34_2.jpg (10111 bytes)

Note that the forces F, FR, which are exerted on gear #2, result in reaction forces of the same  magnitude (but opposite direction) which act on gear #1. Hence magnitude of total radial load on gears
1 and 2 = (F² + FR²) ½                                                                                                                             (12)
In the case of shafts with two bearings, the corresponding bearing loads are given in Cases (a) and (b). Equations (10, 11, 12) remain unchanged for Internal gears.

T34   Next Page   Prev Page