This page gives the comparative results of using the Raimondi and Boyd charts with the Java applet for determining characteristics of parallel shaft journal bearings with hydrodynamic lubrication.

d, mm	20	20	20	100	100	100	100	40	40	40
length	5	5	5	100	100	100	100	40	40	40
c	0.005	0.005	0.005	0.05	0.05	0.05	0.05	0.04	0.04	0.04
Load	10000	10000	10000	100000	100000	100000	100000	2500	2500	2500
Revs/s	100	100	100	20	20	20	20	30	30	30
Viscosity	0.01	0.01	0.01	0.1	0.1	0.1	0.1	0.0275	0.0275	0.0275
circ ints.		72	180		180	180	360		180
length ints.		16	16		32	20	100		16
Iterations		1000	1000		1000	5000	40000		2000
Oil hole dia, mm		0.5	0.5		5	5	5		4
Oil press, N/m2		100000	100000		100000	100000	100000		100000
ecc. ratio	0.925	0.925	0.93	0.47	0.47	0.47	0.47		0.59
Sommerfeld No.	0.04	0.04	0.04	0.2	0.2	0.2	0.2	0.132	0.132	0.132
Results:	Chart results	Applet results	Applet results	Chart results	Applet results	Applet results	Applet results	Chart results	Applet results	Applet results
Friction force, N		10.4	10.76						16.18
Attitude angle	17o	21.8	19	58.5	58.5	59.4	58.9	52	52
Resultant N		8600	9769		80048	99339	99923		2554
Av. Press, MPa		86	97.7		8	9.93	9.99		1.596
Coef. of Friction	0.0011	0.00104	0.001075	0.0046	0.0045	0.00449	0.00448	0.0066	0.00647
Friction power W	69.1	65.5	67.6	2890	2820	2820	2815		61
Oil flow l/s	0.0015	0.000146	0.000146	0.02	0.0148	0.01477	0.01478		0.00358
p/pmax	0.155	0.153	0.153	0.46	0.454	0.431	0.461		0.4054
Theta po, o	23	22	21.6	85	84.5	79.4	83.9	76	70
Theta pmax, o	7.6	7	7.6	17.6	16.5	17.4	16.9	18	18

David J Grieve, CEng, MIMechE, 17th December 2009