BardenB7020CTP4SDULMatched Duplex Super-Precision Spindle Bearing Set – 100 mm ID, 150 mm OD, 24 mm Width, Open, 15°, Light Preload, P4S

Product Description

What this part is

Barden B7020CTP4SDUL matched duplex super-precision angular contact spindle bearing set. Bore: 100 mm. Outside diameter: 150 mm. Width: 24 mm per bearing, 48 mm across the pair. Base number: 7020. Single row per bearing, open, bearing steel rings and balls. The carton also carries the Barden house code 120 and the Fafnir designation 9120WI DUL for the same bearing. GTIN: 4012801451901. Searchable forms include B7020CTP4SDUL, B7020C-T-P4S-DUL, B-7020-C-T-P4S-DUL, B7020C and 9120WI.

Decoding the designation

Bore: 100 mm. The Barden house code on the carton reads 120, and Barden bore codes are multiplied by five, so code 20 gives a 100 mm bore, matching the 100 x 150 x 24 mm envelope. Contact Angle: 15°, from the C position. Cage: machined laminated phenolic, outer-ring guided, rated to 120 °C, from the T position. Precision Class: P4S, ABEC 7/9. Arrangement and preload: matched duplex pair at light preload, from the DUL position.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity, which is why it is the standard machine tool spindle angle. Dynamic Load Rating: 70.2 kN (15,800 lbf). Static Load Rating: 76.5 kN (17,200 lbf). Limiting Speed: 9,000 rpm. Operating temperature: –30 to +120 °C. Mass: 2.78 lb. P4S holds the bore and outside diameter to P4 tolerance and the running accuracy to P9, which is a tighter runout than P4 alone. The machined phenolic cage is light, self-lubricating and quiet at speed, and suits oil-mist and oil-air lubrication.

Quantity and configuration

Two pieces, supplied as a factory-matched duplex set. Ring faces are ground as a pair, so the light preload is reached by clamping the two bearings together against their shoulders. Total width across the pair: 48 mm.

Fitting notes

The two bearings are kept together and mounted in the orientation marked on their outer ring faces. Because preload is ground into the ring faces, this set carries no radial internal clearance class. Rings are clamped solid against the shaft shoulder and the housing shoulder.

Interchange guidance

Equivalents at the same envelope, angle, cage and light preload: SKF 7020 CD/P4ADGA, NSK 7020CTYNSULP4, GMN S6020CTA, FAG B7020-C-T-P4S-DUL. The 7020 A5 and 7020 ACD forms are a related size at 25° and carry different thrust and speed figures. The B7020CTP4SDUM and B7020CTP4SDUH are the same envelope at medium and heavy preload.