NSKN1014BTKRCC1P4Cylindrical Roller Bearing – 70 mm ID, 110 mm OD, 20 mm Width, Single Row, 1:12 Tapered Bore, Open, ABEC 7 / P4.

Product Description

What this part is

A single-row cylindrical roller bearing on a tapered bore, in NSK’s N10 super-precision machine tool series. Bore Diameter: 70 mm. Outside Diameter: 110 mm. Overall Width: 20 mm. Rolling Elements: Cylindrical Roller. Number Of Rows: 1. Bore Type: Tapered 1:12. Closure Type: Open. Precision Class: ABEC 7 / P4. Bearing Material: Bearing steel.

Decoding the designation

N — cylindrical roller bearing, N type. Two integral ribs on the inner ring, a plain ribless outer ring. The rollers and inner ring can move axially relative to the outer ring, so the bearing floats and carries radial load only.

1014 — the N10 light section at 70 mm bore, 110 mm outside diameter, 20 mm width.

K — 1:12 tapered bore. Bore Type: Tapered 1:12.

P4 — ISO tolerance class 4. Precision Class: ABEC 7 / P4.

What these specs mean in practice

A 20 mm width on a 70 mm bore puts this in the thin light section used for machine tool spindles, where radial stiffness and running accuracy matter more than load capacity.

ABEC 7 / P4 tightens bore, outside diameter, width and running-accuracy tolerances well beyond Normal class. That is the class range in which spindle runout is held to single-digit microns.

Mounting data

Bore Diameter: 2.7559 in. Outside Diameter: 4.3307 in. Overall Width: 0.7874 in. The 1:12 tapered bore seats directly on a matching tapered spindle journal. Driving the inner ring further up the taper expands it and sets radial clearance or preload, so no adapter sleeve is involved on this bearing type.

Quantity and configuration

Unit Quantity: 1 Pc.

Interchange guidance

The 70 mm bore on 110 mm outside diameter by 20 mm envelope is the ISO N10 series size, and the crosses listed are the tapered-bore super-precision designations other makers carry at that size.