Jodhpur, Rajasthan, India Download catalog
Western Bearing HousePrecision bearings, Jodhpur, India
Self-aligning ball bearings
Overview

Self-aligning ball bearings from Western Bearing House

Self-aligning ball bearings have two rows of balls running on a common spherical raceway in the outer ring, so the inner ring, balls and cage can tilt to follow shaft deflection or mounting error. They run cool at moderate loads and are offered with cylindrical bore, or tapered bore for adapter sleeves.

Series
11
Catalogued sizes
306
Bore range
5–152.4 mm
O.D. up to
279 mm

Typical applications

Textile spinning framesWoodworking machineryAgricultural shaftsMaterial handling

Engineering features

  • Accommodates misalignment and shaft deflection
  • Cylindrical or tapered (1:12) bore
  • Adapter sleeve, clamping sleeve and nut
  • Metric and inch series
  • Hardness, dimensional and vibration tested
  • AISI 52100 / 100Cr6 steel, 60–64 HRC

Technical specifications

Construction, standards and dimension range for self-aligning ball bearings. Dimensions are converted to millimetres for inch series.

Self-aligning ball bearingsTechnical specification
Bearing typeSelf-aligning ball bearings
Designs and seriesDouble row, 1200, 1300, 2200, 2300 and 10400 series; inch RL, RM, TL and TM
Catalogued sizes306 sizes in 11 series
Bore range (d)5–152.4 mm
Outside diameter (D)19–279.4 mm
Width range (B)6–88 mm
Measurement systemMetric and inch
MaterialHigh-carbon chromium bearing steel, AISI 52100 / 100Cr6
HardnessThrough-hardened, 60–64 HRC
Precision classISO 492 / DIN 620 Normal (P0), P6 and P5
Radial clearanceC2, Normal, C3 and C4
CagePressed steel or polyamide
Bore typeCylindrical, or tapered (1:12) with adapter sleeve, clamping sleeve and nut
Quality testingHardness, dimensional, runout and vibration testing of every bearing
PackingAnti-corrosive VCI export wrapping
Typical applicationsTextile spinning frames, Woodworking machinery, Agricultural shafts, Material handling

Series overview

Every catalog series in this family. Select a series to open its full size and interchange table below.

SeriesSelf-aligning ball bearings: 11 series
SeriesDescriptionSystemSizesBore (d)O.D. (D)Width (B)Catalog page
Double row self-aligning ball bearings
Light series RL
Inch270.5–6 in1.3–10.5 in0.4–1.6 in19
Double row self-aligning ball bearings
Medium series RM
Inch280.5–6 in1.6–11 in0.6–2.3 in20
Double row self-aligning ball bearings
Light series 1200
Metric285–110 mm19–200 mm6–38 mm21
Double row self-aligning ball bearings
Medium series 1300
Metric2310–110 mm35–240 mm11–50 mm22
Double row self-aligning ball bearings
Heavy series 10400
Metric1817–100 mm62–265 mm17–60 mm23
Double row self-aligning ball bearings
Light & medium series 2200 & 2300
Metric4510–110 mm30–240 mm14–88 mm24
Double row self-aligning ball bearings
Light & medium series 4200 & 4300
Metric3410–80 mm30–170 mm14–58 mm25
Self-aligning ball bearings, taper bore
Light series with clamping sleeve and nut
Inch170.6–3.5 in2–7.2 in0.6–1.3 in26
Self-aligning ball bearings, taper bore
Medium series with clamping sleeve and nut
Inch170.6–3.5 in2.3–8.5 in0.7–1.8 in27
Self-aligning ball bearings, taper bore
Light series with clamping sleeve and nut
Metric3417–110 mm47–215 mm14–42 mm28
Self-aligning ball bearings, taper bore
Medium series with clamping sleeve and nut
Metric3517–110 mm52–260 mm15–53 mm29

Size and interchange tables

Bearing numbers with their equivalents and dimensions from our catalog. Select any row for its technical drawing and full cross-reference.

Series RMDouble row self-aligning ball bearings, medium series RM. Dimensions in inches.
Bearing number and equivalentsDimensions (in)
SKFRHPFAGRIVNBC / HoffmannBore dO.D. DWidth B
RM 4NMJ 1/2RM 4PBJ 4UMS 51/21 5/85/8
RM 5NMJ 5/8RM 5PBJ 5UMS 75/81 13/165/8
RM 6NMJ 3/4RM 6PBJ 6UMS 83/4211/16
RM 7NMJ 7/8RM 7PBJ 7UMS 97/82 1/411/16
RM 8NMJ 1RM 8PBJ 8UMS 1012 1/23/4
RM 9NMJ 1.1/8RM 9PBJ 9UMS 111 1/82 13/1613/16
RM 10NMJ 1.1/4RM 10PBJ 10UMS 121 1/43 1/87/8
RM 11NMJ 1.3/8RM 11PBJ 11UMS 12.1/21 3/83 1/27/8
RM 12NMJ 1.1/2RM 12PBJ 12UMS 131 1/23 3/415/16
RM 13NMJ 1.5/8RM 13PBJ 13UMS 13.1/21 5/8415/16
RM 14NMJ 1.3/4RM 14PBJ 14UMS 141 3/44 1/41 1/16
RM 15NMJ 1.7/8RM 15PBJ 15UMS 14.1/21 7/84 1/21 1/16
RM 16NMJ 2RM 16PBJ 16UMS 1524 1/21 1/16
RM 18NMJ 2.1/4RM 18PBJ 18UMS 162 1/451 1/4
RM 20NMJ 2.1/2RM 20PBJ 20UMS 172 1/25 1/21 1/4
RM 22NMJ 2.3/4RM 22PBJ 22UMS 182 3/46 1/41 3/8
RM 24NMJ 3RM 24PBJ 24UMS 19371 9/16
RM 26NMJ 3.1/4RM 26PBJ 26UMS 19.1/23 1/47 1/21 9/16
RM 27NMJ 3.31/8RM 27PBJ 27UMS 19.3/43 3/87 1/21 9/16
RM 28NMJ 3.1/2RM 28PBJ 28UMS 203 1/28 1/81 3/4
RM 30NMJ 3.3/4RM 30PBJ 30UMS 20.1/23 3/48 1/41 3/4
RM 32NMJ 4RM 32PBJ 32UMS 2148 1/21 3/4
RM 34NMJ 4.1/4RM 34PBJ 34UMS 21.1/24 1/48 3/41 3/4
RM 36NMJ 4.1/2RM 36PBJ 36UMS 224 1/29 3/82
RM 38NMJ 4.3/4RM 38PBJ 38UMS 22.1/24 3/4102
RM 40NMJ 5RM 40PBJ 40UMS 235102
RM 44NMJ 5.1/2RM 44PBJ 44UMS 23.1/25 1/2112
RM 48NMJ 6RM 48PBJ 48UMS 246112 1/4

Source: Western Bearing House product guide, page 20. Inch sizes are written as a whole number and fraction, for example 1 1/2.

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