Spring Pad Option - For Dynamic Preload
Part Number	Old Part Number	Description	Use with Bearing Part No.	Use with Bearing Old No.	Free Height A	Recommended Installed		Solid Height	Spring Load at Solid Height	Width B	Length C	D	E	Mounting Dimensions				S.H.C.S. Size K	S.H.C.S. Size J**
						Height	Spring Load							F	G	H	L
R987144775	21905	#4 SPRING PAD	R987144779	21050	0.408	0.390	200 lb	0.375	370 lb	0.84	2.62	2.00	0.16	2.3125	-	-	0.42	No.8	#4-40
					0.398	0.385	250 lb												.62" long
R987144812	21910	#6 SPRING PAD ASSEMBLY	R987144824	21100	0.480	0.454	400 lb	0.437	600 lb	0.97	3.75	2.50	0.16	3.4375	-	-	0.48	No.8	#4-40
					0.470	0.447	500 lb												.75" long
R987144853	21915	#9 SPRING PAD ASSEMBLY	R987144863	21150	0.539	0.517	800 lb	0.500	1500 lb	1.47	4.75	3.25	0.16	4.4375	0.234	1.000	-	No.8	#8-32
					0.529	0.510	1060 lb												1.00" long
R987144715	21920	#12 SPRING PAD ASSEMBLY	R987144726	21200	0.665	0.641	1600 lb	0.625	2700 lb	1.97	6.25	4.50	0.19	5.875	0.172	1.625	-	No.10	#10-32
					0.655	0.635	2000 lb												1.50" long
R987144736	21925	#18 SPRING PAD	R987144874	21250	0.868	0.832	3600 lb	0.812	5050 lb	2.97	8.75	6.50	0.31	8.125	0.266	2.437	-	0.25	.25-20
					0.858	0.822	4500 lb												2.00" long
* CAUTION - Do not use spring pad if the working load on the spring-mounted bearing exceeds installed spring load indicated above.
** Use only screw length J for fastening bearings to spring pad. Do not use longer screws.