What this part is:

MRC 103KSZZG single-row deep groove ball bearing with a rubber seal on each face and a snap ring on the outer ring. Unit Quantity: 4 Pcs. Four individual bearings.

Decoding the designation:

103 — MRC size code for the 17 mm bore extra-light section, ISO 6003 boundary dimensions.

KS — MRC 60xx-series deep groove construction.

ZZ — two rubber seals, one on each face. On MRC this code is an elastomer seal, not a metal shield.

G — snap ring fitted in an outer-ring groove for axial location in the housing.

Specifications:

Bore Diameter: 17 mm. Outside Diameter: 35 mm. Overall Width: 10 mm. Rolling Elements: Ball. Number Of Rows: 1. Closure Type: Contact seals both sides, nitrile rubber. Snap Ring: Yes. Internal Clearance: C3. Precision Class: ABEC 1. Dynamic Load Rating: 6,050 N (1,360 lbf). Static Load Rating: 3,250 N (730 lbf). Cage Material: Pressed steel. Bearing Material: Bearing steel. Item Weight: 0.11 lb. GTIN: 097741000307.

Dimensions and mounting:

Bore Diameter: 17 mm, cylindrical bore. Fillet Radius: 0.3 mm. The snap ring locates the bearing axially against the housing face.

Compatibility and replacement:

Cross-references: NSK 6003DDUNR, NTN 6003LLUNR, Koyo 6003-2RSNR. Base bearing: SKF 6003-2RSH, same 17 x 35 x 10 mm envelope. Carton and search variants: 103-KS-ZZ-G, 103 K S ZZ G, 6003-2RS-NR.

Frequently asked questions:

What are the dimensions of the MRC 103KSZZG?

Bore 17 mm, outside diameter 35 mm, width 10 mm.

Does it include a snap ring?

Yes. The outer ring carries a snap ring for axial location in the housing.

What are the load ratings?

Dynamic load rating 6,050 N (1,360 lbf) and static load rating 3,250 N (730 lbf).