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Tolerances for Mounted Ball Bearing Units from TRITAN OEM

Mounted bearing units for shaft sizes less than 2" have clearance fit-ups. Units for 2" and greater shaft sizes have light interference fit-ups.

Pillow block tolerance base to shaft is:

Bore	Tolerance
1/2 to 1-15/16 in	∓ .006 in
2 to 3-1/2 in	∓ .008 in

Inner and outer ring tolerances are shown in the tables below.

Inner Ring Tolerance (Metric and Inch)

MM				INCHES
Bore Diameter (d)		Tolerance		Bore Diameter (d)		Tolerance
Over	Inc.	+	-	Over	Inc.	+	-
10	18	0.015	0	0.394	0.709	0.0006	0
18	30	0.018	0	0.709	1.181	0.0007	0
30	50	0.021	0	1.181	1.969	0.0008	0
50	80	0.024	0	1.969	3.150	0.0009	0
80	120	0.028	0	3.150	4.724	0.0011	0
120	180	0.033	0	4.724	7.087	0.0013	0

Outer Ring Tolerance (Metric and Inch)

MM				INCHES
OD (D)		Tolerance		OD (D)		Tolerance
Over	Inc.	+	-	Over	Inc.	+	-
6	18	0	0.008	0.236	0.709	0	0.0003
18	30	0	0.009	0.709	1.181	0	0.00035
30	50	0	0.011	1.181	1.968	0	0.00045
50	80	0	0.013	1.968	3.150	0	0.0005
80	120	0	0.015	3.150	4.724	0	0.0006
120	150	0	0.018	4.724	5.905	0	0.0007