Timken 05185B Tapered Roller Bearing Cup Flanged
Brand:
Timken
- Regular price
- $80.00
- Sale price
- $80.00
- Regular price
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Description
SPECIFICATIONS
| Outside Diameter | 1.8504 in |
|---|---|
| Cup Width | 0.4375 in |
| Single or Double Cup | Single Cup |
| Flange Type | Flanged Cup |
| Compatible Cone | 05075, 05079, 05066, 05062, 05075X |
| Series | 05000 |
| ABMA Precision Rating | Class 2 |
| Flange Diameter | 2.0024 in |
| Lubrication Hole Type | No Hole |
| Finish/Coating | Uncoated |
| Manufacturer UPC Number | 53893164175 |
| Weight | 0.14 lbs |
How to Read a Timken Bearing Number
Timken uses two designation systems. Metric bearings follow the ISO standard — multiply the last two digits by 5 for bore diameter (special codes: 00=10mm, 01=12mm, 02=15mm, 03=17mm). Inch tapered roller bearings use Timken's own system with a duty-class prefix, angularity digit, and separate part numbers for the cone (inner ring + rollers + cage) and cup (outer ring). Suffixes are separated by spaces or dots.
LM11949 / LM11910
LM Light-Medium duty • 11949 Cone (inner ring) • 11910 Cup (outer ring) • Inch tapered roller bearing SET 2
22311 EMB W33 C3
223 Spherical roller, series 23 • 11 55mm bore • EMB Extended capacity brass cage • W33 Lubrication groove + 3 holes • C3 Greater than normal clearance
Prefixes & Type Codes
Bearing Type Codes (First Digit — Metric)
| Code | Bearing Type |
|---|---|
| 0 | Double row angular contact ball bearing |
| 1 | Self-aligning ball bearing |
| 2 | Spherical roller bearing |
| 3 | Tapered roller bearing (metric) |
| 4 | Double row deep groove ball bearing |
| 5 | Thrust ball bearing |
| 6 | Single row deep groove ball bearing |
| 7 | Single row angular contact ball bearing |
| 8 | Cylindrical roller thrust bearing |
Tapered Roller — Assembly Types
| Code | Assembly Type |
|---|---|
| TS | Single row — one cone + one cup |
| TSF | Single row with flanged cup |
| TSL | Single row with DUO-FACE Plus seal |
| TDO | Two-row, double outer ring (one double cup + two cones) |
| TDI | Two-row, double inner ring (one double cone + two cups) |
| TDIT | TDI with tapered bore for adapter mounting |
| TNA | Two-row, non-adjustable (inner ring faces abut) |
| TQO | Four-row, straight bore |
| TQOW | Four-row with cone face lubrication slots |
| TQI | Four-row, mixed cone configuration |
| TQIT | Four-row with tapered bore |
| 2TS-IM | Two TS bearings, indirect mounting with spacers |
| 2TS-DM | Two TS bearings, direct mounting (inner rings abutting) |
| SR | SET-RIGHT — two TS bearings with automated preset |
Tapered Roller — Duty Class (Inch System)
| Prefix | Duty Class |
|---|---|
| EL | Extra Light |
| LL | Light-Light (lighter than light) |
| L | Light |
| LM | Light-Medium |
| M | Medium |
| HM | Heavy-Medium |
| H | Heavy |
| HH | Heavy-Heavy (heavier than heavy) |
| EH | Extra Heavy |
Cone & Cup Terminology
| Term | Meaning |
|---|---|
| Cone | Inner ring assembly (inner ring + rollers + cage) — odd-numbered suffix |
| Cup | Outer ring — even-numbered suffix |
| D | Double cone or double cup |
| DA | Double cone or spherical OD double cup |
| DD | Special long double cone or cup |
| P | Puller groove in cone bore |
| G | Retainer groove in cone bore |
| SC | Square bore cone |
Cylindrical Roller Bearings
| Prefix | Configuration |
|---|---|
| NU | Outer ring two flanges, inner ring without flanges — radial load only |
| NJ | Inner ring one flange, outer ring two flanges — radial + one-direction axial |
| NUP | Outer ring two flanges, inner ring one flange + loose rib — light axial both directions |
| N | Inner ring two flanges, outer ring without flanges |
| NF | Inner ring without flanges, outer ring two flanges |
| NCF | Full complement (no cage) — maximum roller count, highest load capacity |
| RY / RX | Four-row cylindrical roller (rolling mill applications) |
Spherical Roller Bearing Series
| Series | Description |
|---|---|
| 222xx | Width series 2, light diameter |
| 223xx | Width series 2, medium diameter |
| 230xx | Width series 3, extra-light diameter |
| 231xx | Width series 3, light diameter |
| 232xx | Width series 3, medium diameter |
| 239xx | Width series 3, extra-wide |
| 240xx | Width series 4, extra-light diameter |
| 241xx | Width series 4, light diameter |
Needle Roller & Cam Followers
| Prefix | Type |
|---|---|
| HK | Drawn cup needle roller bearing, open ends (metric) |
| BK | Drawn cup needle roller bearing, closed end (metric) |
| B / J | Drawn cup needle roller bearing (inch) |
| NA | Machined needle roller bearing with inner ring |
| NK | Machined needle roller bearing without inner ring |
| IR | Separate inner ring for needle roller bearings |
| CR | Standard cam follower (stud type) |
| CRS | Cam follower, sealed |
| CRH | Cam follower, heavy series |
| YCR | Yoke roller (straddle mount) |
Thrust & Housed Unit Prefixes
| Prefix | Type |
|---|---|
| TVL | Angular contact ball thrust, single direction |
| DTVL | Angular contact ball thrust, double (both directions) |
| TP | Cylindrical roller thrust |
| TTHD | Heavy-duty tapered roller thrust |
| UCP | Pillow block housed unit, two-bolt |
| UCF | Four-bolt circular flange housed unit |
| UCFL | Two-bolt rectangular flange housed unit |
| UCT | Take-up unit (adjustable frame) |
| SAF | Split-block pillow block (spherical roller) |
| SNT | Plummer block housing |
Suffixes
Seals & Shields
| Suffix | Meaning |
|---|---|
| Z | Metal shield on one side |
| ZZ | Metal shields on both sides |
| RS | Contact (lip) seal on one side |
| 2RS | Contact (lip) seals on both sides |
| RZ | Non-contact (gap) seal on one side |
| 2RZ | Non-contact (gap) seals on both sides |
| L | DUO-FACE seal assembly (tapered roller bearings) |
| P / PP | Seals on one / both sides (angular contact types) |
Internal Clearance
| Suffix | Meaning |
|---|---|
| C2 | Clearance less than Normal |
| C0 | Normal clearance (default — usually omitted) |
| C3 | Clearance greater than Normal |
| C4 | Clearance greater than C3 |
| C5 | Clearance greater than C4 (loosest) |
Cylindrical roller clearance codes: R1 (tightest) • R2 • R3 (normal) • R4 • R5 (loosest)
Cage / Retainer Type
| Suffix | Meaning |
|---|---|
| M | Machined brass cage |
| TN1 | Polymer (polyamide / nylon) cage |
| EJ | Extended capacity, stamped nitrided steel cage (window type) |
| EM | Extended capacity, machined brass cage (finger type) |
| EMB | Brass cage, finger type, land piloted (spherical roller) |
| YM | One-piece brass cage, roller piloted (spherical roller) |
| YMB | One-piece brass cage, land piloted (spherical roller) |
| YMD | Two-piece brass cage, rows rotate independently (spherical roller) |
| PRC | Moulded reinforced nylon cage (super precision) |
| CR | Phenolic laminate cage (super precision) |
| MBR | Machined bronze retainer (super precision) |
Internal Design & Modifications
| Suffix | Meaning |
|---|---|
| A | Bore, radius, OD, or length differs from standard |
| C | Dimensionally different, non-interchangeable |
| E | Special characteristics, non-interchangeable |
| F | Polymer cage assembly (tapered roller) |
| H | Special cage, rollers, or internal geometry |
| CP | Flash chrome plated, otherwise interchangeable |
| HR | Hydra-rib cup (fluid-controlled roller guidance) |
| W800 | Vibratory / shaker screen modification (tighter tolerances, brass cage, upper C4 clearance) |
Snap Ring, Bore & Flange
| Suffix | Meaning |
|---|---|
| N | Snap ring groove in outer ring |
| NR | Snap ring groove with snap ring installed |
| K | Tapered bore, taper 1:12 (spherical roller) |
| K30 | Tapered bore, taper 1:30 |
| T | Tapered bore cone / tapered OD cup (tapered roller) |
| RB | Snap ring on OD of cup |
| B | Flanged cup (tapered roller) |
| X | Dimensions modified to ISO standard |
Tolerance / Precision Class
| Class | Meaning |
|---|---|
| #4 | Standard (least precise — inch tapered roller) |
| #2 | Standard, tighter than #4 |
| #3 | Precision — automotive grade (copper dot marking) |
| #0 | Precision — tighter than #3 |
| #00 | High precision |
| #000 | Ultra-high precision (tightest — inch tapered roller) |
ISO classes (metric): P0 (normal) • P6 (ABEC-3) • P5 (ABEC-5) • P4 (ABEC-7) • P2 (ABEC-9)
Heat Stabilization
| Suffix | Max Operating Temperature |
|---|---|
| S1 | Up to 200 °C (392 °F) |
| S2 | Up to 250 °C (482 °F) |
| S3 | Up to 300 °C (572 °F) |
| S4 | Up to 350 °C (662 °F) |
Materials
| Code | Meaning |
|---|---|
| (standard) | Case-carburized steel — hard surface, tough ductile core (Timken signature) |
| XX | Special steel cone or cup |
| XP | Special steel and process |
| DV | Double part in special steel |
| H / A | Stainless steel (deep groove / angular contact ball bearings) |
Lubrication Features
| Suffix | Meaning |
|---|---|
| W33 | Annular groove + three lubrication holes in outer ring |
| W30B | Face slots on inner ring for lubrication |
| W22 | Reduced tolerance on outside diameter |
| W45A | Tapped holes on outer ring face |
| S | Lubrication groove + 3 holes in outer ring (spherical roller) |
Matched Sets & Mounting
| Code | Meaning |
|---|---|
| DB | Back-to-back mounting (O arrangement) |
| DF | Face-to-face mounting (X arrangement) |
| DT | Tandem arrangement |
| SET | Matched cone + cup set (automotive wheel bearings, e.g. SET2, SET45) |
| SUL / DUL | Light preload — single / duplex (super precision) |
| SUM / DUM | Medium preload — single / duplex (super precision) |
| SUH / DUH | Heavy preload — single / duplex (super precision) |
Special Product Lines
| Name | Description |
|---|---|
| UNIPAC | Pre-set, pre-sealed, pre-lubricated two-row tapered roller package |
| MileMate | Premium matched cup/cone sets for commercial vehicle wheels |
| SET-RIGHT | Automated preset bearing assemblies |
| AP / AP-2 | Integrated pre-assembled, pre-lubricated bearing for rail/industrial |
| DUO-FACE | Integral seal system for tapered roller bearings |
| 454-Series | Enhanced surface finish for fuel efficiency |
| EnviroSpexx | Energy-efficient roller bearings, optimized internal geometry |
Need help choosing the right Timken bearing? Call us at 1 (248) 429‑9073 or use the chat below.
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