QJ 207 N2MA

Four-point contact ball bearings with locating grooves

Four-point contact ball bearings with locating grooves can withstand higher axial loads and smaller radial loads in both directions. They can be operated at very high speeds and can withstand higher axial forces than deep groove ball bearings. The outer ring assembly with steel balls and cage can be mounted separately from the double half inner ring. Locating grooves can be used to prevent the outer ring from rotating.

  • High speed capability
  • Can withstand higher bi-directional axial loads and smaller radial loads
  • Requires much less axial space than double row angular contact ball bearings
  • Locating grooves can be used to prevent the outer ring from rotating

+86 13817962999

Overview
Technical Parameters

Overview

Skim Through

Size

Inner Diameter35.0mm
Outer Diameter72.0mm
Width17.0mm
Contact angle35.0°

Performance

Basic dynamic load rating49.0kN
Basic rated static load41.5kN
Limiting speed17000.0r/min
SKF Performance Rating SKF Explorer

Properties

Contact type Four-point contact
Number of columns 1
Locating feature, bearing outer ring Locating groove
Ring type Two-piece inner ring and integral outer ring
Cage Machined metal
Mating Configuration None
Universal Matching Bearing None
Axial clearance CN
Material, bearing Bearing steel
Coated without
Sealing Without
Lubricant without
Relubrication function without

Logistics

Net weight0.344kg
eClass Code 23-05-08-05
UNSPSC Code 31171538

Technical Parameters

Technical Parameters

Size

d35.0mm Hole diameter
D72.0mm Outer diameter
B17.0mm Width
d1 ≈44.0mm Diameter of inner ring retaining edge
D1 ≈59.0mm Outer ring flange diameter/seat inner diameter
a37.0mm Distance to load point
h3.5mm Depth of outer ring with positioning groove
b4.5mm Width of outer ring with locating groove
r0 min.0.5mm Positioning groove radius
r1,21.1mm Inner ring chamfer size

Shoulder size

da min.42.0mm Shaft shoulder diameter
Da max.65.0mm Bearing housing shoulder size
ra max.1.0mm Chamfering radius

Data calculation

SKF Performance Levels SKF Explorer
Basic dynamic load rating C49.0kN
Basic Static Load RatingC041.5kN
Fatigue Load LimitPu1.76kN
Limit speed17000.0r/min
Calculation coefficient A0.00473
Limit value e0.95
Calculation coefficient X0.6
Calculation factorY00.58
Calculation factorY10.66
Calculation factorY21.07

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