NTN7202CGGNP4Precision Angular Contact Ball Bearing – 15 mm ID, 35 mm OD, 11 mm Width, Open, 15° Contact Angle, Normal Preload, ISO Class 4, Universal Flush Ground

Product Description

What this part is

NTN 7202CG/GNP4 single-row precision angular contact ball bearing. Bore: 15 mm. Outside Diameter: 35 mm. Overall Width: 11 mm. Number Of Rows: 1. Rolling Elements: Ball, steel. Bore Type: Straight. Closure Type: Open. Bearing Material: high carbon chrome steel. Series: 7200, ISO dimension series 02.

Decoding the designation

Contact Angle: 15°, given by the C. Mounting Arrangement: universal flush ground, given by the G, so any two bearings clamp together back-to-back, face-to-face or in tandem at the rated preload. Preload: normal, given by the GN. Precision Class: ISO Class 4, equivalent to P4 and ABEC 7. Searchable forms of the number: 7202CG/GNP4, 7202CGGNP4, 7202 C G GN P4, 7202CG-GNP4.

Cage and temperature

Cage Material: nylon. Cage Type: fibre-glass reinforced, moulded. Operating Temperature Range: −40 to 120 °C. Lubricant: grease or oil. A glass-reinforced nylon cage is light and low-friction, so it runs cooler at high speed than a metal cage and damps ball-pocket noise.

Mounting data

Shaft abutment diameter da min: 19.5 mm. Housing abutment diameter Da max: 30.5 mm. Housing abutment Db max: 32.5 mm. Bearing fillet radius r min: 0.6 mm. Fillet radius r1 min: 0.3 mm. Abutment fillet ras max: 0.6 mm. Abutment fillet r1as max: 0.3 mm. Inner ring recess diameter d1: 20.8 mm. Outer ring recess diameter D1: 29.0 mm.

What these specs mean in practice

A 15° contact angle favours speed and radial rigidity over thrust capacity, which is why it is the standard machine-tool spindle angle. ISO Class 4 holds bore, outside diameter, radial runout and face runout far tighter than a standard-class bearing, which is what keeps spindle runout down at speed. Normal preload is the middle setting in NTN’s ladder: enough to hold true rolling contact and angular stiffness, with less heat generation than a heavy setting.

Quantity and configuration

Unit Quantity: 1 Pc. Internal Clearance: N/A. The bearing is preload-set at manufacture rather than clearance-set, so no radial clearance class applies. Two bearings mounted as a universal flush-ground pair occupy a total width of 22 mm.

Interchange guidance

Carton designations carried on this part: 7202 C G GN P4 and 2MM202 WI CR. The Fafnir 2MM prefix on that carton cross gives the same 15° angle. The 15 x 35 x 11 mm envelope at 15° and P4 is shared with the SKF 7202 CD/P4A, the FAG B7202-C-T-P4S-UL and the NSK 7202CTRSU. A 7202A5, 7202AC or 7202E in this envelope carries a 25° contact angle, which makes it a related size rather than a substitution.