SKFDouble Row Angular Contact Ball Bearing — 25 mm ID, 62 mm OD, 25.4 mm Width, 30° Contact Angle, Open with Snap Ring, CN Clearance

Product Description

What this part is

SKF 5305ANR double row angular contact ball bearing. Bore Diameter: 25 mm (0.9843 in). Outside Diameter: 62 mm (2.4409 in). Overall Width: 25.4 mm (1.0000 in). Contact Angle: 30°. Number Of Rows: 2. Two rows of balls in a back-to-back (O) arrangement inside one-piece inner and outer rings, with a snap ring fitted in a groove in the outer ring. SKF’s metric designation for the same bearing is 3305 A-NR.

Decoding the designation

5305 — SKF and MRC US numbering for the ISO 3305 double row angular contact series, 25 mm bore, heavy (03) section.

A — SKF’s standard internal design for this series, pressed steel cage.

N — snap ring groove machined into the outside surface of the outer ring.

R — snap ring supplied fitted.

What these specs mean in practice

Dynamic Load Rating: 32,500 N (7,306 lbf). Static Load Rating: 22,000 N (4,946 lbf). Limiting Speed: 11,000 rpm. Reference Speed: 11,000 rpm. Cage Material: Pressed steel. Internal Clearance: CN. Bearing Material: Bearing steel. Item Weight: 0.351 kg (0.774 lb). SKF performance class: SKF Explorer.

A double row angular contact bearing carries radial load, axial load in both directions and tilting moment in the axial space of a single bearing. The two ball rows sit apart inside the bearing, so moment load is reacted within the bearing.

Locating (fixed) bearing: it sets the axial position of the shaft.

Mounting data

Mounting Arrangement: Back-to-back (O), integral to the bearing. The snap ring seats in a groove on the outside surface of the outer ring and locates the bearing axially in a through-bored housing.

Quantity and configuration

Unit Quantity: 1 Pc. A single one-piece double row bearing. The snap ring is supplied fitted.

Cross-references with snap ring

SKF 3305 A-NR is this bearing in SKF’s metric numbering. MRC 5305CG is the MRC-branded double row snap ring bearing on the same 25 x 62 x 25.4 mm envelope, with a 30° contact angle and steel cage; MRC lists it at 30,700 N dynamic and 10,000 rpm, against SKF’s 32,500 N and 11,000 rpm for the 5305 A-NR. Other makers’ 25 x 62 x 25.4 mm bearings with snap ring groove and snap ring: NTN 5305NR (25° contact angle), NTN 3305NR (32°), NSK 5305NRTNC3 (25°, polyamide cage, C3 clearance) and NSK 3305BNRTNC3 (40°, polyamide cage, C3 clearance). The SKF 5305 A has a 30° contact angle; a different angle changes axial load capacity and axial stiffness.

Same size without snap ring

SKF 3305 A, FAG 3305-BD-XL-TVH (polyamide cage), NSK 3305BTN (polyamide cage) and NTN 3305 have a plain outer ring and need a housing shoulder to locate the bearing axially.

Common spellings: 5305 A NR, 5305-ANR, 5305ANR, 5305-NR, 3305ANR, 3305 A NR. The carton on this stock is marked MRC 5305-SBG.

Frequently asked questions

Is a snap ring included? Yes. The snap ring is fitted in the outer ring groove.

What is the SKF metric number? 3305 A-NR. Without the snap ring it is 3305 A.

What is the contact angle? 30°.

Can I use a bearing without a snap ring? Only if the housing has a shoulder to locate the outer ring axially.