High precision machined needle roller bearings NA4904

High precision machined needle roller bearings NA 4904

Single row needle roller bearing with machined rings, with flanges

Single row needle roller bearings incorporate cylindrical rollers that are small in diameter relative to their length. Owing to their large number of rollers, the bearings have a high load carrying capacity. The outer ring includes two integral flanges to guide the bearing axially and an annular groove with one or more lubrication holes to facilitate relubrication.

• High radial load carrying capacity

• High stiffness

• Low cross-sectional height

• Accommodate axial displacement in both directions

• Separable design

Drawing showing:

Part No details:

	For shaft diameter	Features
	in mm
NK	5 - 110	light series
NK..-D	14 - 55	Light series, with improved steel cage
NK..-TW	30	Light series, with plastic cage, two short needle rollers per cage pocket
NKS	20 - 75	heavy series
RNA49	14 - 160	dimension series 49, to DIN 617/ISO 1206
RNA48	120 - 415	dimension series 48, to DIN 617/ISO 1206
RNA69	16 - 35	dimension series 69
RNA69..-ZW	40 - 110	Dimension series 69, double row
RNA49..-RSR	14 - 58	dimension series 49, lip seal on one side
RNA49..-2RSR	14 - 58	dimension series 49, lip seals on both sides
NKI	5 - 100	light series
NKI..-TW	35 - 55	Light series, with plastic cage, two short needle rollers per cage pocket
NKIS	15 - 65	heavy series
NA49	10 - 140	dimension series 49, to DIN 617/ISO 1206
NA48	110 - 380	dimension series 48, to DIN 617/ISO 1206
NA69	12 - 30	dimension series 49, to DIN 617/ISO 1206
NA69..-ZW	32 - 95	Dimension series 69, double row
NA49..-RSR	10 - 50	dimension series 49, lip seal on one side
NA49..-2RSR	10 - 50	dimension series 49, lip seals on both sides
NAO	6 - 90	without ribs
NAO..-ZW-ASR1	25 - 30	without ribs, double row
RNAO	5 - 100	without ribs
RNAO..-ZW-ASR1	18 - 60	without ribs, double row
NCS	5/8 " - 4 1/2 "	machined raceway to ABMA 18.2 - 1982, inch sizes

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