NTN 21312D1 Spherical Roller Bearing D= 60mm

SKU: NTN 21312D1


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NTN 21312D1 Spherical Roller Bearing D= 60mm

A roller bearing with an inner ring featuring a two-row raceway groove, an outer ring featuring a spherical raceway surface, and barrel-shaped rolling elements.
· The center of the outer ring raceway surface coincides with the centerline of the bearing. Self-aligning.
· Can even be used when inner ring and outer ring tilting exists due to shaft deflection or housing mounting errors.
· Used for locations where shaft and housing alignment is difficult.
· Shafts which deflect easily such as drive shafts.
· When there are large axial loads.
· Steel equipment, papermaking machinery, mining machinery, etc.
· Ideal for bearing radial load, axial load in 2 directions, and combined radial and axial loads.


Raceway Ring Shape Self-aligning roller Load Direction Radial
Inner Dia. d(Ø) 60 Outer Dia. D(Ø) 130
Width B(mm) 31 Inner/Outer Ring Material Steel
Number of Raceway Ring Rows Double Row Size Standards Metric System
Specifications/Environment Standard Rolling Element Material Steel
Outer Ring Type Flat Retainer Type Momi removing
Basic Load Rating: Dynamic Load(N) 167000 Bearing Ring With Oil Hole, Oil Groove
Internal Clearance Symbol NA Shaft Bore Config. Cylindrical Bore
Type of momi removing - Symbol of Bearing Ring Shape -
Revolution Frequency(rpm) 3400 Series Type 213
JAN code - Trusco code -
Mass(g) - RoHS 10

1. Design features and characteristics

Spherical roller bearings consist of an outer ring having a continuous spherical raceway and two rows of barrel-shaped rollers guided by an inner ring with two raceways. (Refer to Fig. 1) This bearing has self-aligning properties, and therefore is suited for use where misalignment between the inner and outer rings occurs from housing installation error or shaft bending.
Spherical roller bearings have a large capacity for radial loads, axial loads in either direction, and combined loads. They are also suited for applications where vibration and shock loads are encountered. When spherical roller bearings are used with a vertical shaft or under a large axial load, the load on the rollers of the row that is not subject to the axial load becomes small, and the resulting skidding on the rollers may result in wear. If the ratio of the axial load to the radial load exceeds the factor e in the dimension table (Fa/Fr > e), consult NTN Engineering.
In addition to spherical roller bearings with cylindrical bores, spherical roller bearings with tapered bores are also available. Bearings with tapered bores are specified by the suffix “K” at the end of the spherical roller bearing part number. The standard taper ratio is 1:12 for bearings with a “K” suffix; for bearings in series 240 and 241, the suffix “K30” indicates the taper ratio for a bearing is 1:30. Most tapered bore bearings incorporate the use of adapters and withdrawal sleeves for shaft mounting.




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