Ball bearing cross-references

Basic bearing cross-reference information.

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Glossary

  • Radial ball bearings will accommodate moderate to heavy radial loads and low to moderate thrust loads in either direction.
  • Deep groove radial bearings are manufactured as open type bearings for oil or grease lubrication. They are also available with metal shields and/or seals for use where moderate contamination is present in the operation.
  • Angular contact bearings are single row types used where radial and thrust loads are combined in the same application. They provide sufficient internal clearances to assume a specific contact angle under thrust loading and are available with angles of 15, 30 and 40 degrees.
  • Double row bearings are manufactured both as filling slot and Conrad types, in light and medium series. The filling slot type has higher load capacity but the Conrad type provides a quieter operation and should be used when noise is a consideration.
  • Self-Aligning bearings are manufactured with two rows of balls and one continuous spherical raceway in the outer ring. This allows for limited misalignment of the shaft and housing.
  • Maximum capacity bearings are filling slot type bearings used in applications involving heavy radial loads and low speeds where thrust loads are comparatively low. The incorporated filling slots in the inner and outer rings so they can be loaded with additional balls for greater capacity.
  • Mast guide bearings are bearings with a high load capacity, specially designed for use in fork lift trucks. These bearings are similar to single row or double row deep groove bearings but the outer race has a very thick cross-section which performs as a wheel or tire. Mast guide bearings can withstand heavy radial loads and occasional thrust loads. Mounted on the fork carriage they provide smooth action as the forks are raised and lowered.
  • Integral shaft bearings include a shaft with bearing races machined on its OD The outer bearing ring, cage and rolling elements are mounted directly on the shaft and an inner ring is not required. These are commonly referred to as water pump bearings since that is a major application for them.
  • Special bearings include Inch Series bearings, bearings made specifically for automotive air compressor applications and bearings made with special bore, width, or OD

Interchange - Single Row Deep Groove Ball Bearings

Photo courtesy of McMaster-Carr.

Photo courtesy of McMaster-Carr.

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Photo courtesy of McMaster-Carr.

Photo courtesy of McMaster-Carr.

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  Description NSK SKF Torr / Faf FAG MRC
P/N Inch Rxx Rxx Sxx Rxx Rxx
Extra small 6xx 6xx 3x 6xx 3x
Extra light 60xx 60xx 91xxK 60xx 1xxK
Light 62xx 62xx 2xx 62xx 2xxS
Medium 63xx 63xx 3xx 63xx 3xxS
Extra thin section 68xx 618xx -- 618xx --
Very thin section 69xx 619xx 93xxK 619xx --
Thin section 16xxx 16xxx -- 16xxx --
Maximum capacity, light BL2xx 2xx 2xxW 2xx 2xxM
Maximum capacity, medium BL3xx 3xx 3xxW 3xx 3xxM
Suffix Two seals (contact) DDU 2RS PP 2RSR ZZ
One seal (contact) DU RS P RSR Z
Two shields ZZ 2Z DD 2ZR FF
One shield Z Z D ZR F
Snap ring NR NR G NR G
Steel cage BLANK J BLANK BLANK BLANK
Brass Cage M M MBR M BRZ
Heat stabilized 200C X28 S1 -- S1 --
Tight clearance C2 C2 H C2 Tight
Normal clearance BLANK BLANK R BLANK Normal
Loose clearance C3 EM(C3) P C3 Loose
Extra loose clearance C4 C4 J C4 Extra Loose
Electric motor grade E QE6 -- -- --

Interchange - Double Row Ball Bearings

Photo courtesy of McMaster-Carr.

Photo courtesy of McMaster-Carr.

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Photo courtesy of McMaster-Carr.

Photo courtesy of McMaster-Carr.

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  Description NSK SKF Torr / Faf MRC
P/N Self-aligning, extra narrow 12xx 12xx -- --
Self-aligning, narrow 133xx 13xx -- --
Self-aligning, wide 22xx 22xx -- --
Self-aligning, extra wide 23xx 23xx -- --
Double row, maximum compliment, light 32xx 52xxE 52xxW 52xxM (K)
Double row, max. compliment, medium 33xx 53xxE 53xxW 53xxM (K)
Double row, conrad, light 52xx 52xxA 52xxK 52xxC(SBK)
Double row, conrad, medium 53xx 53xxA 53xxK 53xxC (SB)
Suffix Two seals 2RS 2RS1 -- --
Two shields ZZ 2Z -- FF
Snap ring NR NR G G
polyamide cage TNG TN9 pRB --
Steel cage J BLANK BLANK BLANK
Tapered bore K K -- --
Extra capacity E E -- --
Tight clearance C2 C2 H C2
Normal clearance BLANK BLANK R BLANK
Loose clearance C3 C3 p C3
Extra loose clearance C4 C4 J C4

Interchange - Angular Contact (ABEC 1 & 3) Ball Bearings

Photo courtesy of McMaster-Carr.

Photo courtesy of McMaster-Carr.

Direct link to image

Photo courtesy of McMaster-Carr.

Photo courtesy of McMaster-Carr.

Direct link to image

  Description NSK SKF Torr / Faf FAG MRC
P/N Light 72xx 72xx 72xx 72xx 72xx
Medium 73xx 73xx 73xx 73xx 73xx
Heavy 74xx 74xx 74xx 74xx 74xx
Suffix 40 deg. contact B B WN B pJ
30 deg. contact A -- -- -- BLANK
25 deg. contact A5 ACD -- E --
15 deg. contact C CD -- C R
Machined brass cage M M MBR Mp BRZ
pressed brass cage Y Y BLANK Yp --
polyamide cage TY p pRC TVp BKE
Steel cage W J -- Jp BLANK
Flush ground faces G G BLANK UO,UA DU
petrochemical BMpC BECBM -- -- pumppac*