FAGNU1020EM1AP53 / NU1020-XL-M1ACylindrical Roller Bearing 100x150x24 mm Single Row Non-Locating NU Design Brass Cage P5 Accuracy C3 Clearance

Product Description

What this part is

A single-row cylindrical roller bearing, 100 mm bore × 150 mm outside diameter × 24 mm width, in the NU10 extra-light dimension series to DIN 5412-1. The NU design carries two integral ribs on the outer ring and a plain, ribless inner ring, so the roller and cage assembly can shift axially against the inner raceway. That makes it a non-locating bearing: it carries radial load only and lets the shaft expand thermally without loading itself axially.

Decoding the designation

NU indicates two ribs on the outer ring and no ribs on the inner ring, a non-locating design with an inner ring separable from the outer ring and roller set. The 10 marks the NU10 dimension series, an extra-light section of 24 mm width across a 25 mm radial envelope. The 20 is the bore code for a 100 mm bore. The E indicates a reinforced internal design, giving a larger roller complement and higher radial load capacity than the base design in the same envelope. M1A denotes a two-piece machined brass cage, roller-guided. P53 is the combination suffix for P5 dimensional and running accuracy together with C3 radial internal clearance.

What these specs mean in practice

P5 accuracy tightens bore, outside diameter and running-accuracy tolerances well inside normal class, which is what suits this bearing to machine-tool spindles, precision gearboxes and grinding heads where shaft runout is part of the specification. C3 clearance is greater than normal, which preserves operating clearance where the inner ring runs hotter than the housing or where an interference fit on the shaft closes some of the built-in clearance.

The two-piece machined brass cage is roller-guided and dimensionally stable at elevated temperature, and it tolerates oil-jet and oil-mist lubrication and rapid acceleration better than a pressed steel cage. The operating temperature window for the standard product is −30 °C to 150 °C.

Published ratings and mounting data

Basic dynamic load rating, radial (Cr), is 116 kN. Basic static load rating, radial (C0r), is 135 kN. Fatigue load limit, radial (Cur), is 17.7 kN. Reference speed is 4,150 rpm and limiting speed is 9,000 rpm. Mass is approximately 1.44 kg. Outer ring raceway diameter E is 137 mm and inner ring raceway diameter F is 113 mm. Minimum outer ring rib diameter D1 is 132.9 mm. Permissible axial displacement s is 2.9 mm. Shaft shoulder diameter da is 106 mm minimum and 111 mm maximum, and abutment shoulder db is 116 mm minimum. Housing shoulder diameter Da is 143 mm maximum. Chamfer dimensions are r 1.5 mm minimum and r1 1.1 mm minimum, with maximum recess radii ra 1.5 mm and ra1 1 mm.

Quantity and configuration

One bearing, open on both faces, no seals or shields, no snap ring groove. Complete assembly: outer ring, cage, roller set and separable inner ring.

Fitting notes

The separable inner ring allows the two halves to be mounted independently — inner ring onto the shaft, outer ring into the housing — and brought together on final assembly. The 2.9 mm axial displacement figure is the total float available between the roller set and the outer ring ribs, which sets how much thermal growth the position can absorb. Both rings seat against square shoulders within the da and Da limits above; radial lubricant supply reaches the roller set through the housing, since this design has no lubrication groove or holes in the outer ring.

Interchange guidance

The current Schaeffler designation for this bearing is NU1020-XL-M1A-P53. Same-envelope alternatives from other makers appear as NU1020 with equivalent brass-cage and accuracy suffixes. Related sizes rather than interchanges: NU1020-M1-C3 is the same geometry at normal tolerance class instead of P5, and NJ1020 and NUP1020 share the 100 × 150 × 24 mm envelope but locate the shaft axially, which is a different function.