roller elements US HG Technology Corporation

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Series

Range

Cylindrical Bearing Roller and Tapered Bearing Roller

Cylindrical Roller Accuracy Grade Unit:μm
Roller Grade	Dw/mm		ΔRw	SDw	VDwL	VLwL	VDwmp	Surface Roughness/Ra
Roller Grade	＞	≤	(Roundn ess)	(End face run-out)	（Variation of lot diameter)	（Variation of lot Length)	（Variation of mean diameter)	Outer Diameter	End Face	Chamfer
G1	3	18	0.5	6	1.5	5	0.8	0.1	0.125	1.25
G1A	3	30	0.8	6	2	7	1.2	0.125	0.16	1.25
G2	3	50	1	6	2	10	1.5	0.125	0.2	1.25
G2A	10	160	1.3	6	3	13	2	0.16	0.25	2.5

Tapered Roller Accuracy Grade Unit:μm
Roller Grade	Dw/mm		Geometrical tolerance			Deviation of Angle of taper		Deviation of roller gauge lot diameter		Surface Roughness/Ra
			VDwsp	ΔRw	SDw	Δ2φ		VDwL	Δ2φL	Cone surface	Spherical substrate	Other surfaces
	Over	To	max			High	Low	max		max
Ⅰ	10	18	0.5		2.5	+1.0	-1.0	1.5	1.0	0.08	0.125	1.25
	18	30	0.8		3.0	+1.5	-1.5	2.0	1.5
	30	50	1.2		4.0	+2.0	-2.0	2.5	2.0	0.125	0.16
Ⅱ	10	18	1.2		4.0	+2.0	-2.0	2.5	2.0	0.125	0.16	2.5
	18	30	1.5		5.0	+2.5	-2.5	3.0	2.5
	30	160	2.0		6.0	+3.0	-3.0	3.5	3.0	0.16	0.20

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