NSK7019CTRDUHP4YAngular Contact Ball Bearing Pair – 95 mm Bore, 145 mm OD, 24 mm Wide, 15° Contact Angle, ABEC 7, Heavy Preload, Phenolic Cage

Product Description

What this part is

NSK 7019CTRDUHP4Y super-precision angular contact ball bearings, supplied as a universally ground matched pair. Bore Diameter: 95 mm. Outside Diameter: 145 mm. Overall Width: 24 mm per bearing, 48 mm across the pair. Contact Angle: 15°. Precision Class: ABEC 7 / P4Y. Preload: Heavy, 2,350 N. Cage Material: Phenolic. Cage Type: Machined, outer-ring guided. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1 per bearing. Item Weight: 2.42 kg (5.34 lb) for the pair, 1.211 kg (2.67 lb) each. Series: 10. Unit Quantity: 2 Pcs.

Decoding the designation

70 — ISO dimension series 10 single-row angular contact ball bearing, the light spindle section.

19 — bore code. Multiplied by five it gives the 95 mm bore.

C — 15° contact angle, the high-speed choice in NSK’s super-precision range.

TR — laminated phenolic cage, outer-ring guided. Rated to 120 °C and chosen for quiet, high-speed running.

DU — universally ground paired unit. The two bearings are matched at manufacture and mount back-to-back, face-to-face or in tandem.

H — heavy preload, 2,350 N axial for this size and angle.

P4Y — NSK’s special accuracy class, held tighter than P4 for running accuracy.

What these specs mean in practice

Dynamic Load Rating: 73,500 N per bearing. Static Load Rating: 73,000 N per bearing. On the 70-series section at this bore the two figures sit close together, which is normal for a light-section super-precision bearing rather than a heavy industrial one.

Limiting Speed: 8,600 rpm grease; 14,000 rpm oil. Those are the single-bearing figures under a light spring preload. NSK applies a 0.40 factor to a heavy-preload back-to-back pair and 0.95 to a spring-loaded tandem pair, so the arrangement decides the working ceiling as much as the bearing does.

Preload: Heavy, 2,350 N. Axial stiffness at that preload is 246 N/µm. Heavy preload buys stiffness and positional accuracy and costs speed and running temperature; light preload does the reverse.

Contact Angle: 15°. Shallow, so the load path runs closer to radial and the bearing tolerates high speed. A 25° execution of the same size carries more thrust and turns slower.

Cage Material: Phenolic. Laminated fabric-base phenolic, machined and guided on the outer ring land, running to a 120 °C ceiling.

Lubricant: grease or oil. NSK quotes the oil figure for an oil/air system and the grease figure for a premium high-speed synthetic grease.

Mounting data

Chamfer r min: 1.5 mm. Chamfer r1 min: 1.0 mm. Shaft abutment d1 min: 104 mm. Housing abutment D1 max: 136 mm, D2 max: 139 mm. Effective load centre a: 28.1 mm from the bearing face. Internal volume: 51.8 cm³, which sets the grease charge. Pitch circle diameter for lubrication jets: 113.3 mm.

Grease quantity runs at 30 percent of internal volume below 60 percent of the set’s maximum speed, 20 percent above that, and 10 to 15 percent above 80 percent.

Each ring is marked at its high point of radial runout — a burnished spot on the inner ring face, a V line on the outer diameter. Aligning those marks and opposing them to the shaft and housing eccentricities minimises assembled runout.

Quantity and configuration

Two bearings, factory matched. Unit Quantity: 2 Pcs. Mounting Arrangement: universally matchable, back-to-back, face-to-face or tandem.

Interchange guidance

Every cross below sits on the same 95 x 145 x 24 mm envelope at 15°. Precision class, preload level and cage material are the variables, and each cross states where it differs from this execution.

RHP builds the identical bearing on the same NSK drawing, so an RHP 7019CTRDUHP4 is a straight interchange. A polyamide- or nylon-caged execution changes the temperature ceiling; a light- or medium-preload set changes the stiffness and the speed limit.

GTIN: 029176588181.

Searchable forms of the number: 7019CTRDUHP4Y, 7019-C-TR-DUH-P4Y, 7019 CTR DUH P4Y, 7019C, 71919 is a different section.