TIMKEN bearing nomenclature

Timken Tapered Roller Bearing Nomenclature

Part numbering systems for single row radial tapered roller bearings (type TS) are internationally recognized. Several part numbering systems have been developed and can be classified according to either metric or inch systems. Inch system bearings are typically assigned individual part numbers for the inner ring and outer ring, while ISO (metric) bearings are assigned a unique part number for the entire bearing group, which includes the inner ring and outer ring. .

In all part numbering systems, the term bearing series is used to describe bearings with the same basic internal geometry (e.g. roller dimensions, inner ring and outer ring angles). Any inner ring (including roller set) can be combined with any outer ring of the same series, as long as the same type of bearing is used.

Timken Deep Groove Ball Bearing Nomenclature

TIMKEN product catalog

Series code

• 6: extra small
• 618: ultralight
• 619: ultralight
• 161: extra extra light
• 60: extra light
• 62: light
• 63: medium
• 64: heavy
• 160: extra light and thin type
• 620: wide light type
• 630: medium wide type

Hole code

• 00: 10mm
• 01: 12mm
• 02: 15mm
• 03: 17mm
• 04 and later: hole (mm) = code x 5

Common suffixes

• M: brass cage
• TN1: polymer cage
• H: Stainless steel bearing

Closings and resources

• Z: a shield
• ZZ: two shields
• RS: a contact seal
• 2RS: two contact seals
• RZ: a contactless seal
• 2RZ: two non-contact seals
• NR: elastic ring
• N: snap ring groove

Internal settlement

• C2: narrow
• C0/vacuum: normal
• C3: dissolved
• C4: extra loose
• C5: extra extra extra loose

Special code

for example, special grease or non-standard geometric features

TIMKEN Angular Contact Ball Bearings Nomenclature

prefixes

• A: stainless steel
• F: flanged outer ring
• H: tight fit
• J: Extra loose internal fit
• JJ: Extra extra loose inner fit
• L: internal self-aligning
• M: ABEC 3 Accuracy
• Q: Loose fit
• A: Normal fit
• S: Size type extra small in inches
• T: tight fit
• V: ABEC 5 Accuracy
• W: Wide type single line (same inner and outer width)
• WIR: single row, wide interior only

Numbers: series of basic types

• S1: 3, 5, 7, etc., single row inches, extra small
• 30: Single-line metric, extra small
• 100: single line, very large
• 200: single line, light
• 300: single line, medium
• 5200: double row, light
• 5300: double row, medium
• 7200: single row, corner contact, lightweight
• 7300: single row, corner contact, medium
• 7400: single line, corner contact, heavy
• 9100: single row, ultralight
• 9300: single row, ultralight
• XLS: size in inches, Conrad type

Tedious

• 04 and later: multiply the last two numbers by five to obtain the hole in millimeters
• 00: 10mm
• 01: 12mm
• 02: 15mm
• 03: 17mm

suffixes

• C1, C2, C3, etc.: manufacturing code – for Timken® use only
• FT: complete ball complement
• K: Conrad, slotless filler type
• W: Maximum capacity, fill slot type
• WI: angular contact, low outside shoulder
• WO: angular contact, low shoulder in
• WN: angular contact, low shoulder, inside and outside

Additional features

• B: spherical outer diameter
• BR: Bronze Casting Parade
• D: a shield
• DD: two shields
• G: Wireloc (circle)
• L: a mechanical seal
• LL: two mechanical seals
• MBR: machined bronze stop
• Q: a stamp
• PP: two seals
• PP2, 3, 4, etc.: Triple seals if the prefix letter is W (example: W208PPB5)
• A: A rubber floor seal
• RR: two rubber ground seals
• S: external self-alignment
• SMBR: silicon bronze iron seal
• T: a felt seal
• TT: two felt stamps

TIMKEN Super Precision Ball Bearings Nomenclature

Angular contact

contact angle

• 2 = 15°
• 3 = 25°

Accuracy class

• MM/MMV: very high accuracy between ABEC 7 (ISO P4) and ABEC 9 (ISO P2)
• MMX: ultra precision ABEC 9 (ISO P2)

C: hybrid ceramic

Series

• 9300: ultralight
• 9100: extra light
• 99100: extra light
• 200: light
• 300: medium

Construction

• K: Conrad
• WI: angular contact; low shoulder on the outer ring
• WO: angular contact; low shoulder on the inner ring
• WN: angular contact; low shoulder on both rings
• HX: angular contact; low shoulder on both rings

servant

• No seal recalls involve Timken® Fafnir® PRC
• PRB: molded nylon cage
• RPC: Molded Reinforced Nylon Cage
• CR: Phenolic (Composition) – Timken Fafnir Standard
• MBR: worked bronze
• VV: High Speed ​​Seals

Preload: Universal level ground

• * SUX: Single bearing, ultra-light
• *ON: Single bearing, lightweight
• * SOMA: Single bearing, medium
• * SUH: Single bearing, heavy
• DUX: duplex bearing pairs, ultralight
• DUL: Pair of duplex bearings, lightweight
• DUM: Duplex bearing pairs, medium
• DUH: Duplex bearing pairs, heavy
• TUX: triplex bearing set, ultralight
• TUL: triplex bearing set, lightweight
• TUM: triplex bearing set, medium
• TUH: triplex bearing set, heavy
• QUX: quadruplex bearing set, ultralight
• QUL: Quadruplex bearing assembly, lightweight
• QUM: Quadruplex Bearing Set, Medium
• QUH: Quadruplex bearing assembly, heavy

A3188: An example of a non-standard specification number

Timken High Precision Ball Bearings – Ball Screw Bearings

• MM: ABEC 7 (ISO P4) with narrower lateral runout
• BS: Ball screw support series designation by metric number
• Number of bearings in the set
  Duplex DU (2)
  TU triplex (3)
  QU quadruplex (4)
• Preload level
  I light
  medium M
  * Heavy H

• MM: ABEC 7 (ISO P4) with narrower lateral runout
• Ball screw holder series designation by number in inches
• Relative hole size:
  number
  biggest hole biggest
• Design: Timken® Fafnir® specific
• Series: High Capacity
• Number of bearings in the set:
  Duplex DU (2)
  TU triplex (3)
  QU quadruplex (4)
• Preload level:
  I light
  medium M
  * Heavy H

TIMKEN Cylindrical Roller Bearings Nomenclature

Metric/inch standard cylindrical roller bearing styles

The nomenclature of TIMKEN cylindrical bearings is based on ISO standard designations.

Catalog: TIMKEN cylindrical roller bearings

Dimensional series
Series Width + Series Diameter
10 = series 1 width; diameter series 0 (dimensional series 10)
2 = series width 0; diameter series 2 (dimensional series 02)
22 = series 2 width; diameter series 2 (dimensional series 22)
3 = series width 0; diameter series 3 (dimensional series 03)
23 = series 2 width; diameter series 3 (dimensional series 23)

Nomenclature of ABMA cylindrical roller bearings

• Series:
  two digits indicate the metric envelope size and
  three digits indicate the size of the envelope
• Changes:
  (the first two letters are assigned by Timken engineers)
  letter other than “O” in the first position indicates modification of the inner ring.
  The letter other than “O” in the second position indicates the modification of the outer ring.
• Internal radial clearance:
  R1
  R2
  R3 = Standard
  R4> R3
  R5> R4

Timken Full Complement Cylindrical Roller Bearing (NCF) Nomenclature

Size Series Series
width + diameter series
10 = series 1 width; diameter series 0 (dimensional series 10)
2 = series width 0; diameter series 2 (dimensional series 02)
22 = series 2 width; diameter series 2 (dimensional series 22)
3 = series width 0; diameter series 3 (dimensional series 03)
23 = series 2 width; diameter series 3 (dimensional series 23)

Timken Four Row Cylindrical Roller Bearing Nomenclature

• Identify the type of project:
  RY
  RYL
  RX
  RXL
• Modification codes:
  W33 = Holes and grooves in DE
  W30B = Front grooves on inner ring.
• Radial internal clearance (RIC):
  CF = semi-finished product
  C2
  C0 = default
  C3>C0
  C4>C3
  C5>C4
  C6 = Special game

TIMKEN spherical roller bearings nomenclature

• Common modifications and style codes:
  K = conical hole
  EJ = 2-piece steel cage – window type
  EM/YM = 1 piece brass cage – finger type,
  Roller-driven EMB/YMB = 1 piece of brass, finger type,
  Ground-Piloted YMD = 2-Piece Brass, Finger Type, Ground-Piloted
  W33 = 3 holes and slot in DE
  W800 = vibrating screen modification: – tighter bore diameter and outer diameter tolerances – brass cage – RIC on top 2/3 of specified clearance
• Radial internal clearance (RIC):
  C2
  C0= normal
  C3>C0
  C4>C3
  C5>C4
  C6 = special game

Nomenclature of SNK TIMKEN SNT spherical blocks

Nomenclature of TIMKEN SAF spherical roller bearings

• Two or four screw SAF pad, cast iron
• Heavy Duty Two or Four Bolt SAFD Pad, Ductile Iron
• Two or four screw SAFS cushion cover, cast steel
• SDAF Four Bolt Heavy Duty Cast Iron Pad
• SDAFD Four Bolt Heavy Type Cushion Cover, Ductile Iron
• SDAFS Heavy Duty Four Bolt Block Bracket, Cast Steel
• FSAF four-bolt damper block, cast iron (only when optional)
• FSAFD four-bolt bearing, ductile iron (only when optional)
• Four-bolt FSAFS, cast steel pad (only when optional)

TIMKEN thrust bearing nomenclature

Nomenclature of thrust ball bearings with cylindrical and tapered screw

TVL: Axial Angular Contact Ball Bearing

DTVL: Thrust angular contact ball bearing – upper and lower complement of balls

TP: Cylindrical roller thrust bearing

TPS: Cylindrical roller thrust bearing with self-aligning washer

TTSX: Thrust tapered roller bearing with convex profile guide

TTSV: Threaded tapered roller thrust bearing with concave profile raceway

TTSF: Thrust tapered roller bearing with flat top profile

Nomenclature of spherical thrust roller bearings

• Series size
  92 Light
  93 Medium
  94 Heavy
  95 Extra Heavy
• Standard capacity in white, brass cage
  EJ Extended capacity, steel cage
  EM Extended capacity, brass cage

TIMKEN Spherical Plain Bearing Nomenclature

• SF: normal spherical type (radial inches); single fracture outer ring
• SFH: normal spherical type (radial inches); single fracture outer ring, wide inner ring
• FFS: normal spherical type (radial inches); double fracture outer ring
• SBT: Spherical Normal Angular Contact Type (Radial Inch)
• For sale: normal spherical type (metric radial); single fracture outer ring
• FSH: normal spherical type (metric radial); single fracture outer ring, wide inner ring