RHP6305TBP4Precision Deep Groove Ball Bearing – Straight Bore, 25 mm ID, 62 mm OD, 17 mm Width, Open, ABEC 7, CN Clearance, Machined Phenolic Cage

Product Description

What this part is

RHP 6305TBP4 precision deep groove ball bearing, 63 dimension series, 25 mm bore x 62 mm outside diameter x 17 mm width. Bore: 25 mm. Outside Diameter: 62 mm. Overall Width: 17 mm. Bore Type: Straight. Number Of Rows: 1. Rolling Elements: Balls, 8 off, 10.319 mm ball diameter. Closure Type: Open. Precision Class: ABEC 7 (RHP EP7 / ISO Class 4). Internal Clearance: CN, normal. Cage Material: Machined laminated phenolic. Cage Type: Machined, one-piece, inner-ring guided. Design Units: Metric. Material: Chrome bearing steel.

Decoding the designation

6 marks a single-row radial deep groove ball bearing. 03 gives the medium dimension series and 05 the bore code, so the bore is 25 mm. T: phenolic resin cage. B: inner-ring guided cage location. P4: RHP EP7, equal to ISO tolerance class 4 and ABEC 7. The carton also carries the Fafnir spindle deep groove designation MM305K-CR. Searchable variants: 6305TB P4, 6305 T/TB P4, 6305TP4, MM-305-K, MM305K-CR.

What these specs mean in practice

Dynamic Load Rating: 22.6 kN (5,081 lbf). Static Load Rating: 11.2 kN (2,518 lbf). Item Weight: 0.235 kg (0.51 lb). Number Of Balls: 8. Ball Diameter: 10.319 mm. Calculation factor f0: 13.2. The 63 medium series puts a larger ball on the same 25 mm bore than a 62-series bearing, so the load ratings are roughly half again as high in the same shaft size. A deep groove bearing carries radial load and thrust in both directions through a single row of balls, and it has no contact angle. ABEC 7 running accuracy holds radial and axial runout far tighter than a standard-class bearing. The machined laminated phenolic cage is light and quiet, and is rated for continuous service to 120 °C. Lubricant: grease or oil. Maximum Operating Temperature: 120 °C. Minimum Operating Temperature: -30 °C.

Quantity and configuration

Unit Quantity: 1 Pc. Open on both faces.

Fitting notes

Diameter of Shaft Abutment: 31.5 mm minimum, 36 mm maximum. Diameter of Housing Abutment: 55.5 mm maximum. Chamfer Dimension: 1.1 mm minimum. Maximum Shaft or Housing Fillet Radius: 1 mm.

Interchange guidance

Same-envelope designations: Fafnir MM305K-CR, RHP 6305TP4. The 25 x 62 x 17 mm boundary is the ISO 6305 envelope, so any 6305 shares the fit; the ABEC 7 tolerance and the machined phenolic cage are what distinguish this execution.